Publications
| Title | Abstract | Year Filter | PMID(sorted descending) Filter |
|---|
| leaf litter processing and energy flow through macroinvertebrates in a woodland pond (switzerland). | energy generated by leaf litter processing and its flow through the associated macroinvertebrate community was quantified in a pond near geneva (switzerland). annual density, biomass, and production on oak (quercus robur) leaf litter were assessed for all macroinvertebrate taxa with emphasis on predators. empirical energetic relations provided an energy budget for the macroinvertebrate community. on 1 m(2) of pond bottom, the processing of 5641 kj of oak leaf litter resulted in 8.5% of leachate ... | 1993 | 28312452 |
| food, feeding rates and assimilation in woodland snails. | analyses of the faeces of seven species of woodland, litterdwelling snails (marpessa laminata, clausilia bidentata, oxychilus cellarius, o. alliarius, discus rotundatus, arianta arbustorum and hygromia striolata), showed that all feed predominently on higher plant material, be it living or dead. h. striolata and a. arbustorum took more chlorophyll-containing plant material than the other species, d. rotundatus had a significant amount of fungus in its faeces, while the faeces of o. cellarius and ... | 1970 | 28309717 |
| the decomposition of branch-wood in the canopy and floor of a mixed deciduous woodland. | the pattern of decomposition of branch-wood greater than 2 cm diameter is described for a one hectare site at meathop wood, cumbria, based on studies carried out as part of the ibp between 1967 and 1972. three phases of decomposition are recognised. following the death of branches in the canopy and their colonisation by fungi, decomposition proceeded at an average annual loss rate of about 8.4%. wood at branch-fall had on average lost about 40% of its original dry weight. on the forest floor the ... | 1976 | 28309258 |
| the chemical composition of plant galls: are levels of nutrients and secondary compounds controlled by the gall-former? | the chemical composition of galled and ungalled plant tissue was compared in a series of experiments. gall and adjacent plant tissue was analysed for 20 species of gall-former on 11 different plant species. there were clear differences between galled and ungalled tissue in levels of nutrients and secondary compounds. gall tissue generally contained lower levels of nitrogen and higher levels of phenolic compounds than ungalled plant tissue. the gall tissue produced by the same plant in response t ... | 1998 | 28308028 |
| the shifting phenological landscape: within- and between-species variation in leaf emergence in a mixed-deciduous woodland. | many organisms rely on synchronizing the timing of their life-history events with those of other trophic levels-known as phenological matching-for survival or successful reproduction. in temperate deciduous forests, the extent of matching with the budburst date of key tree species is of particular relevance for many herbivorous insects and, in turn, insectivorous birds. in order to understand the ecological and evolutionary forces operating in these systems, we require knowledge of the factors i ... | 2017 | 28303184 |
| a novel dendrochronological approach reveals drivers of carbon sequestration in tree species of riparian forests across spatiotemporal scales. | aboveground carbon (c) sequestration in trees is important in global c dynamics, but reliable techniques for its modeling in highly productive and heterogeneous ecosystems are limited. we applied an extended dendrochronological approach to disentangle the functioning of drivers from the atmosphere (temperature, precipitation), the lithosphere (sedimentation rate), the hydrosphere (groundwater table, river water level fluctuation), the biosphere (tree characteristics), and the anthroposphere (dik ... | 2017 | 27653780 |
| α-glucosidase inhibition and antioxidant activity of an oenological commercial tannin. extraction, fractionation and analysis by hplc/esi-ms/ms and (1)h nmr. | two batches of the oenological tannin tan'activ r, (toasted oak wood - quercus robur), were extracted with ethanol. a fractionation on xad-16 afforded four fractions for each extract. extracts and fractions were evaluated for antioxidant activity (dpph), polyphenol content (gae) and yeast α-glucosidase inhibitory activity. comparable results were obtained for both columns, fractions x1b and x2b showing the highest antioxidant activity. fractions x1c and x2c notably inhibited α-glucosidase, with ... | 2017 | 27542449 |
| transcriptome analysis in oak uncovers a strong impact of endogenous rhythmic growth on the interaction with plant-parasitic nematodes. | pedunculate oak (quercus robur l.), an important forest tree in temperate ecosystems, displays an endogenous rhythmic growth pattern, characterized by alternating shoot and root growth flushes paralleled by oscillations in carbon allocation to below- and aboveground tissues. however, these common plant traits so far have largely been neglected as a determining factor for the outcome of plant biotic interactions. this study investigates the response of oak to migratory root-parasitic nematodes in ... | 2016 | 27520023 |
| in vitro dermo-cosmetic evaluation of bark extracts from common temperate trees. | wood residues produced from forestry activities represent an interesting source of biologically active, high value-added secondary metabolites. in this study, 30 extracts from 10 barks of deciduous and coniferous tree species were investigated for their potential dermo-cosmetic use. the extracts were obtained from fagus sylvatica, quercus robur, alnus glutinosa, prunus avium, acer pseudoplatanus, fraxinus excelsior, populus robusta, larix decidua, picea abies, and populus tremula after three suc ... | 2016 | 27352384 |
| linking xylem water storage with anatomical parameters in five temperate tree species. | the release of water from storage compartments to the transpiration stream is an important functional mechanism that provides the buffering of sudden fluctuations in water potential. the ability of tissues to release water per change in water potential, referred to as hydraulic capacitance, is assumed to be associated with the anatomy of storage tissues. however, information about how specific anatomical parameters determine capacitance is limited. in this study, we measured sapwood capacitance ... | 2016 | 27083523 |
| tree age effects on fine root biomass and morphology over chronosequences of fagus sylvatica, quercus robur and alnus glutinosa stands. | there are few data on fine root biomass and morphology change in relation to stand age. based on chronosequences for beech (9-140 years old), oak (11-140 years) and alder (4-76 years old) we aimed to examine how stand age affects fine root biomass and morphology. soil cores from depths of 0-15 cm and 16-30 cm were used for the study. in contrast to previously published studies that suggested that maximum fine root biomass is reached at the canopy closure stage of stand development, we found almo ... | 2016 | 26859755 |
| predicting bird phenology from space: satellite-derived vegetation green-up signal uncovers spatial variation in phenological synchrony between birds and their environment. | population-level studies of how tit species (parus spp.) track the changing phenology of their caterpillar food source have provided a model system allowing inference into how populations can adjust to changing climates, but are often limited because they implicitly assume all individuals experience similar environments. ecologists are increasingly using satellite-derived data to quantify aspects of animals' environments, but so far studies examining phenology have generally done so at large spa ... | 2015 | 26640682 |
| comparison of δ(18)o and δ(13)c values between tree-ring whole wood and cellulose in five species growing under two different site conditions. | we investigated the applicability of tree-ring whole-wood material for δ(18)o and δ(13)c analysis in comparison with the more time- and resource-intensive use of cellulose, by considering possible variability between (i) five different tree species (fagus sylvatica, quercus robur, picea abies, abies alba, pseudotsuga menziesii), (ii) two sites that differ in soil moisture, and (iii) climate conditions within a 10-year period. | 2015 | 26522315 |
| influence of catchment vegetation on mercury accumulation in lake sediments from a long-term perspective. | organic matter (om) cycling has a large impact on the cycling of mercury (hg) in the environment. hence, it is important to have a thorough understanding on how changes in, e.g., catchment vegetation - through its effect on om cycling - affect the behavior of hg. to test whether shifts in vegetation had an effect on hg-transport to lakes we investigated a sediment record from herrenwieser see (southern germany). this lake has a well-defined holocene vegetation history: at ~8700years bp corylus a ... | 2015 | 26363145 |
| large scale transcriptome analysis reveals interplay between development of forest trees and a beneficial mycorrhiza helper bacterium. | pedunculate oak, quercus robur is an abundant forest tree species that hosts a large and diverse community of beneficial ectomycorrhizal fungi (emfs), whereby ectomycorrhiza (em) formation is stimulated by mycorrhiza helper bacteria such as streptomyces sp. ach 505. oaks typically grow rhythmically, with alternating root flushes (rfs) and shoot flushes (sfs). we explored the poorly understood mechanisms by which oaks integrate signals induced by their beneficial microbes and endogenous rhythmic ... | 2015 | 26328611 |
| explaining the variability of the photochemical reflectance index (pri) at the canopy-scale: disentangling the effects of phenological and physiological changes. | assessing photosynthesis rates at the ecosystem scale and over large regions is important for tracking the global carbon cycle and remote sensing has provided new and useful approaches for performing this assessment. the photochemical reflectance index (pri) is a good estimator of short-term light-use efficiency (lue) at the leaf scale; however, confounding factors appear at larger temporal and spatial scales. in this study, canopy-scale pri variability was investigated for three species (fagus ... | 2015 | 26295453 |
| home advantage? decomposition across the freshwater-estuarine transition zone varies with litter origin and local salinity. | expected increases in the frequency and intensity of storm surges and river flooding may greatly affect the relative salinity of estuarine environments over the coming decades. in this experiment we used detritus from three contrasting environments (marine fucus vesiculosus; estuarine spartina anglica; terrestrial quercus robur) to test the prediction that the decomposition of the different types of litter would be highest in the environment with which they are associated. patterns of decomposit ... | 2015 | 26247807 |
| psychiatric disorders and polyphenols: can they be helpful in therapy? | the prevalence of psychiatric disorders permanently increases. polyphenolic compounds can be involved in modulation of mental health including brain plasticity, behaviour, mood, depression, and cognition. in addition to their antioxidant ability other biomodulating properties have been observed. in the pathogenesis of depression disturbance in neurotransmitters, increased inflammatory processes, defects in neurogenesis and synaptic plasticity, mitochondrial dysfunction, and redox imbalance are o ... | 2015 | 26180581 |
| transpiration of urban trees and its cooling effect in a high latitude city. | an important ecosystem service provided by urban trees is the cooling effect caused by their transpiration. the aim of this study was to quantify the magnitude of daytime and night-time transpiration of common urban tree species in a high latitude city (gothenburg, sweden), to analyse the influence of weather conditions and surface permeability on the tree transpiration, and to find out whether tree transpiration contributed to daytime or nocturnal cooling. stomatal conductance and leaf transpir ... | 2016 | 26048702 |
| leaf mineral nutrient remobilization during leaf senescence and modulation by nutrient deficiency. | higher plants have to cope with fluctuating mineral resource availability. however, strategies such as stimulation of root growth, increased transporter activities, and nutrient storage and remobilization have been mostly studied for only a few macronutrients. leaves of cultivated crops (zea mays, brassica napus, pisum sativum, triticum aestivum, hordeum vulgare) and tree species (quercus robur, populus nigra, alnus glutinosa) grown under field conditions were harvested regularly during their li ... | 2015 | 26029223 |
| fungal planet description sheets: 281-319. | novel species of fungi described in the present study include the following from south africa: alanphillipsia aloeicola from aloe sp., arxiella dolichandrae from dolichandra unguiscati, ganoderma austroafricanum from jacaranda mimosifolia, phacidiella podocarpi and phaeosphaeria podocarpi from podocarpus latifolius, phyllosticta mimusopisicola from mimusops zeyheri and sphaerulina pelargonii from pelargonium sp. furthermore, barssia maroccana is described from cedrus atlantica (morocco), codinae ... | 2014 | 25737601 |
| tree species affect cation exchange capacity (cec) and cation binding properties of organic matter in acid forest soils. | soil organic matter (som) in forest soil is of major importance for cation binding and acid buffering, but its characteristics may differ among soils under different tree species. we investigated acidity, cation exchange properties and al bonding to som in stands of scots pine, pedunculate oak, norway spruce, european beech and common hornbeam in southern poland. the content of total carbon (ct) was by far the major contributor to total cation exchange capacity (cect) even in loamy soils and a s ... | 2015 | 25596350 |
| tree species composition affects the abundance of rowan (sorbus aucuparia l.) in urban forests in finland. | recent studies have shown a considerable increase in the abundance of rowan (sorbus aucuparia) saplings in urban forests in finland, yet the reasons for this increase are not well understood. here we investigated whether canopy cover or tree species composition, i.e., the basal areas of different tree species in norway spruce dominated urban forests, affects the abundances of rowan seedlings, saplings and trees. altogether 24 urban forest patches were investigated. we sampled the number of rowan ... | 2015 | 25588119 |
| negative and positive interactions among plants: effects of competitors and litter on seedling emergence and growth of forest and grassland species. | living plant neighbours, but also their dead aboveground remains (i.e. litter), may individually exert negative or positive effects on plant recruitment. although living plants and litter co-occur in most ecosystems, few studies have addressed their combined effects, and conclusions are ambivalent. therefore, we examined the response in terms of seedling emergence and growth of herbaceous grassland and forest species to different litter types and amounts and the presence of competitors. we condu ... | 2015 | 25381837 |
| urban tree effects on soil organic carbon. | urban trees sequester carbon into biomass and provide many ecosystem service benefits aboveground leading to worldwide tree planting schemes. since soils hold ∼75% of ecosystem organic carbon, understanding the effect of urban trees on soil organic carbon (soc) and soil properties that underpin belowground ecosystem services is vital. we use an observational study to investigate effects of three important tree genera and mixed-species woodlands on soil properties (to 1 m depth) compared to adjac ... | 2014 | 25003872 |
| role of human gut microbiota metabolism in the anti-inflammatory effect of traditionally used ellagitannin-rich plant materials. | ellagitannin-rich plant materials are widely used in traditional medicine as effective, internally used anti-inflammatory agents. due to the not well-established bioavailability of ellagitannins, the mechanisms of observed therapeutic effects following oral administration still remain unclear. the aim of the study was to evaluate if selected ellagitannin-rich plant materials could be the source of bioavailable gut microbiota metabolites, i.e. urolithins, together with determination of the anti-i ... | 2014 | 24969824 |
| tree mineral nutrition is deteriorating in europe. | the response of forest ecosystems to increased atmospheric co2 is constrained by nutrient availability. it is thus crucial to account for nutrient limitation when studying the forest response to climate change. the objectives of this study were to describe the nutritional status of the main european tree species, to identify growth-limiting nutrients and to assess changes in tree nutrition during the past two decades. we analysed the foliar nutrition data collected during 1992-2009 on the intens ... | 2015 | 24920268 |
| antibacterial and quorum sensing regulatory activities of some traditional eastern-european medicinal plants. | the objective of this study was to screen extracts of twenty eastern european medicinal plants, using wild-type and reporter chromobacterium violaceum bioassays, for novel components that target bacterial cells and their quorum sensing (qs) communication systems. three types of activity and their combinations were revealed: (i) direct antimicrobial growth-inhibitory activity, (ii) non-specific and specific pro-qs activities, (iii) anti-qs activity. among seven plant extracts showing direct growt ... | 2014 | 24914718 |
| elemental concentrations in deposited dust on leaves along an urbanization gradient. | environmental health is an essential component of the quality of life in modern societies. monitoring of environmental quality and the assessment of environmental risks are often species based on the elemental concentration of deposited dust. our result suggested that stomata size and distribution were the most important factors influencing the accumulation of air contaminants in leaves. we found that the leaves' surfaces of acer negundo and celtis occidentalis were covered by a large number of ... | 2014 | 24875264 |
| variation in leaf flushing date influences autumnal senescence and next year's flushing date in two temperate tree species. | recent temperature increases have elicited strong phenological shifts in temperate tree species, with subsequent effects on photosynthesis. here, we assess the impact of advanced leaf flushing in a winter warming experiment on the current year's senescence and next year's leaf flushing dates in two common tree species: quercus robur l. and fagus sylvatica l. results suggest that earlier leaf flushing translated into earlier senescence, thereby partially offsetting the lengthening of the growing ... | 2014 | 24799708 |
| streptomyces-induced resistance against oak powdery mildew involves host plant responses in defense, photosynthesis, and secondary metabolism pathways. | rhizobacteria are known to induce defense responses in plants without causing disease symptoms, resulting in increased resistance to plant pathogens. this study investigated how streptomyces sp. strain ach 505 suppressed oak powdery mildew infection in pedunculate oak, by analyzing rna-seq data from singly- and co-inoculated oaks. we found that this streptomyces strain elicited a systemic defense response in oak that was, in part, enhanced upon pathogen challenge. in addition to induction of the ... | 2014 | 24779643 |
| apoplastic and symplastic phloem loading in quercus robur and fraxinus excelsior. | whereas most of the research on phloem loading is performed on herbaceous plants, less is known about phloem loading strategies in trees. in this study, the phloem loading mechanisms of quercus robur and fraxinus excelsior were analysed. the following features were examined: the minor vein structure, the sugar concentrations in phloem sap by the laser-aphid-stylet technique, the distribution of photoassimilates in the mesophyll cells by non-aqueous fractionation, gradients of sugar concentration ... | 2014 | 24591056 |
| a comparative study of physiological and morphological seedling traits associated with shade tolerance in introduced red oak (quercus rubra) and native hardwood tree species in southwestern germany. | northern red oak (quercus rubra l.), a moderately shade-tolerant tree species, is failing to regenerate throughout its native north american range, while successful recruitment in central europe has been observed since its introduction. to examine whether comparative photosynthetic performance could explain the regeneration success of this non-native species in central europe, we compared the physiological and morphological seedling traits of red oak with three co-occurring tree species under th ... | 2014 | 24531297 |
| identification of ugt84a13 as a candidate enzyme for the first committed step of gallotannin biosynthesis in pedunculate oak (quercus robur). | a cdna encoding the ester-forming hydroxybenzoic acid glucosyltransferase ugt84a13 was isolated from a cdna library of quercus robur swelling buds and young leaves. the enzyme displayed high sequence identity to resveratrol/hydroxycinnamate and hydroxybenzoate/hydroxycinnamate glucosyltransferases from vitis species and clustered to the phylogenetic group l of plant glucosyltransferases, mainly involved in the formation of 1-o-β-d-glucose esters. in silico transcriptome analysis confirmed expres ... | 2014 | 24412325 |
| changes in the ige-reacting protein profiles of acer negundo, platanus x acerifolia and quercus robur pollen in response to ozone treatment. | this study aims to investigate the effects of o3 in protein content and immunoglobulin e (ige)-binding profiles of acer negundo, platanus x acerifolia and quercus robur pollen. pollen was exposed to o3 in an environmental chamber, at half, equal and four times the limit value for the human health protection in europe. pollen total soluble protein was determined with coomassie protein assay reagent, and the antigenic and allergenic properties were investigated by sds-page and immunological techni ... | 2014 | 24382092 |
| [effect of plant extracts on cytotoxic activity of vibrio cholerae hemolysin]. | study of plant extracts that have the ability to neutralize cytotoxic activity of hemolysin. | 2013 | 24341209 |
| plasmodesmata and pit development in secondary xylem elements. | developing pit membranes of secondary xylem elements in drimys winteri, fagus sylvatica, quercus robur, sorbus aucuparia, tilia vulgaris and trochodendron aralioides have been examined by transmission electron microscopy. absence of plasmodesmata from the membranes of vessel elements and tracheids indicates that their pits develop independently of these structures. on the other hand, plasmodesmata are abundant in pit membranes between fibres, parenchyma cells, and combinations of these cell type ... | 1982 | 24271775 |
| consistency of observations of forest tree defoliation in three european countries. | the crown densities of 186 trees of five common european tree species (norway spruce (picea abies), silver fir (abies alba), scots pine (pinus sylvestris), oak (quercus robur) and beech (fagus sylvatica) were assessed simultaneously by observation teams from france, germany and the united kingdom. major differences in the scores existed, with the maximum difference on any one tree being 45%. differences tended to be consistent, with the french team scoring more lightly than the german team and t ... | 1993 | 24227454 |
| do climate and soil influence phenotypic variability in leaf litter, microbial decomposition and shredder consumption? | we tested the hypothesis that water stress and soil nutrient availability drive leaf-litter quality for decomposers and detritivores by relating chemical and physical leaf-litter properties and decomposability of alnus glutinosa and quercus robur, sampled together with edaphic parameters, across wide european climatic gradients. by regressing principal components analysis of leaf traits [n, p, condensed tannins, lignin, specific leaf area (sla)] against environmental and soil parameters, we foun ... | 2014 | 24221083 |
| a comparative study into the chemical constitution of cutins and suberins from picea abies (l.) karst., quercus robur l., and fagus sylvatica l. | the compositions of bf3/ch3oh depolymerisates of cutins and suberins from leaf and periderm samples from picea abies [l.] karst., quercus robur l., and fagus sylvatica l., respectively, were determined by quantitative capillary gas chromatography/mass spectroscopy. long-chain monobasic, ω-hydroxymonobasic, dihydroxymonobasic, trihydroxymonobasic and epoxyhydroxymonobasic alkanoic acids constituted the major aliphatic monomers of leaf cutins. the total amounts of cutin monomers ranged from 629 mg ... | 1991 | 24186347 |
| detection and quantification of a mycorrhization helper bacterium and a mycorrhizal fungus in plant-soil microcosms at different levels of complexity. | host plant roots, mycorrhizal mycelium and microbes are important and potentially interacting factors shaping the performance of mycorrhization helper bacteria (mhb). we investigated the impact of a soil microbial community on the interaction between the extraradical mycelium of the ectomycorrhizal fungus piloderma croceum and the mhb streptomyces sp. ach 505 in both the presence and the absence of pedunculate oak microcuttings. | 2013 | 24025151 |
| [formation peculiarities of quercus robur l. acorn mycobiota under conditions of kyiv polissya]. | the structure of mycobiota (epiphytic and from inner tissues) of q. robur acorns (580 samples) under conditions of kyiv polissya was studied. acorn samples were collected from oak trees during vegetation period. the epiphytes and mycobiota isolated from inner tissues of acorns was represented by 38 and 20 species, respectively. the majority of fungi were isolated in july. cosmopolitan and non-specific species acremonium sp., alternaria alternata, cladosporium cladosporioides, trichoderma harzian ... | 2013 | 24006787 |
| consistency of defoliation data of the national training courses for the forest condition survey in germany from 1992 to 2012. | the consistency of visual assessment of tree defoliation, which represents the most widely used indicator for tree condition, has frequently been in the focus of scientific criticism. thus, the objective of the present study was to examine the consistency of the defoliation data from the annual national training courses for the forest condition survey in germany from 1992 to 2012. defoliation assessments were carried out in stands of beech (fagus sylvatica), oak (quercus robur and quercus petrae ... | 2014 | 23955498 |
| physical and chemical properties of some imported woods and their degradation by termites. | the influence of physical and chemical properties of 20 species of imported wood on degradation of the wood by termites under field conditions was studied. the wood species studied were: sycamore maple, acer pseudoplatanus l. (sapindales: sapindaceae) (from two countries), camphor, dryobalanops aromatic c.f.gaertner (malvales: dipterocarpaceae), beech, fagus grandifolia ehrhart (fagales: fagaceae), f. sylvatica l. (from two countries), oak, quercus robur l., ash, fraxinus angustifolia vahl (lami ... | 2013 | 23906349 |
| relationship between photochemical reflectance index and leaf ecophysiological and biochemical parameters under two different water statuses: towards a rapid and efficient correction method using real-time measurements. | the use of the photochemical reflectance index (pri) as a promising proxy of light use efficiency (lue) has been extensively studied, and some issues have been identified, notably the sensitivity of pri to leaf pigment composition and the variability in pri response to lue because of stress. in this study, we introduce a method that enables us to track the short-term pri response to lue changes because of photosynthetically active radiation (par) changes. the analysis of these short-term relatio ... | 2014 | 23906049 |
| sustainable bio-production of styrene from forest waste. | a strain of penicillium expansum was studied for the production of styrene using forest waste biomass as a feeding substrate. the fungal strain was cultivated on bark of various trees supplemented with yeast extract and the volatiles produced were collected on tenax ta and analyzed by gas chromatography-mass spectrometry. fungus cultured on grated soft bark of pine (pinus sylvestris) stems (gpb) and mature bark of oak (quercus robur) supplemented with yeast extract produced relatively the highes ... | 2013 | 23899574 |
| using sex pheromone and a multi-scale approach to predict the distribution of a rare saproxylic beetle. | the european red click beetle, elater ferrugineus l., is associated with wood mould in old hollow deciduous trees. as a result of severe habitat fragmentation caused by human disturbance, it is threatened throughout its distribution range. a new pheromone-based survey method, which is very efficient in detecting the species, was used in the present study to relate the occurrence of e. ferrugineus to the density of deciduous trees. the latter data were from a recently completed regional survey in ... | 2013 | 23840415 |
| chlorophyll fluorescence kinetics, photosynthetic activity, and pigment composition of blue-shade and half-shade leaves as compared to sun and shade leaves of different trees. | the chlorophyll (chl) fluorescence induction kinetics, net photosynthetic co2 fixation rates p n, and composition of photosynthetic pigments of differently light exposed leaves of several trees were comparatively measured to determine the differences in photosynthetic activity and pigment adaptation of leaves. the functional measurements were carried out with sun, half-shade and shade leaves of seven different trees species. these were: acer platanoides l., ginkgo biloba l., fagus sylvatica l., ... | 2013 | 23670216 |
| differential radial growth patterns between beech (fagus sylvatica l.) and oak (quercus robur l.) on periodically waterlogged soils. | climate scenarios for northern central europe project rising temperatures and increasing frequency and intensity of droughts but also a shift in precipitation pattern with more humid winters. this in turn may result in soil waterlogging during the following spring, leading to increasing stress for trees growing on hydric sites. the influence of waterlogging on growth of common beech and pedunculate oak has been studied intensively on seedlings under experimental conditions. however, the question ... | 2013 | 23564694 |
| metal uptake and allocation in trees grown on contaminated land: implications for biomass production. | phytostabilization aims to reduce environmental and health risks arising from contaminated soil. to be economically attractive, plants used for phytostabilization should produce valuable biomass. this study investigated the biomass production and metal allocation to foliage and wood of willow (salix viminalis l.), poplar (populus monviso), birch (betula pendula), and oak (quercus robur) on five different soils contaminated with trace elements (te), with varying high concentrations of cu, zn, cd, ... | 2013 | 23487987 |
| odor, gaseous and pm10 emissions from small scale combustion of wood types indigenous to central europe. | in this study, we investigated the emissions, including odor, from log wood stoves, burning wood types indigenous to mid-european countries such as austria, czech republic, hungary, slovak republic, slovenia, switzerland, as well as baden-württemberg and bavaria (germany) and south tyrol (italy). the investigations were performed with a modern, certified, 8 kw, manually fired log wood stove, and the results were compared to emissions from a modern 9 kw pellet stove. the examined wood types were ... | 2012 | 23471123 |
| forest floor leachate fluxes under six different tree species on a metal contaminated site. | trees play an important role in the biogeochemical cycling of metals, although the influence of different tree species on the mobilization of metals is not yet clear. this study examined effects of six tree species on fluxes of cd, zn, doc, h(+) and base cations in forest floor leachates on a metal polluted site in belgium. forest floor leachates were sampled with zero-tension lysimeters in a 12-year-old post-agricultural forest on a sandy soil. the tree species included were silver birch (betul ... | 2013 | 23376521 |
| mast pulses shape trophic interactions between fluctuating rodent populations in a primeval forest. | how different functional responses of consumers exploiting pulsed resources affect community dynamics is an ongoing question in ecology. tree masting is a common resource pulse in terrestrial ecosystems that can drive rodent population cycles. using stable isotope (δ(13)c, δ(15)n) analyses, we investigated the dietary response of two fluctuating rodent species, the yellow-necked mouse apodemus flavicollis and the bank vole myodes glareolus, to mast events in białowieża forest (ne poland). rodent ... | 2012 | 23251475 |
| volatile fingerprints of seeds of four species indicate the involvement of alcoholic fermentation, lipid peroxidation, and maillard reactions in seed deterioration during ageing and desiccation stress. | the volatile compounds released by orthodox (desiccation-tolerant) seeds during ageing can be analysed using gas chromatography-mass spectrometry (gc-ms). comparison of three legume species (pisum sativum, lathyrus pratensis, and cytisus scoparius) during artificial ageing at 60% relative humidity and 50 °c revealed variation in the seed volatile fingerprint between species, although in all species the overall volatile concentration increased with storage period, and changes could be detected pr ... | 2012 | 23175670 |
| comparative mapping in the fagaceae and beyond with est-ssrs. | genetic markers and linkage mapping are basic prerequisites for comparative genetic analyses, qtl detection and map-based cloning. a large number of mapping populations have been developed for oak, but few gene-based markers are available for constructing integrated genetic linkage maps and comparing gene order and qtl location across related species. | 2012 | 22931513 |
| mycorrhiza analyses in new zealand truffières reveal frequent but variable persistence of tuber melanosporum in co-existence with other truffle species. | this study compiles the results from an examination of mycorrhizae on root samples from tuber melanosporum truffières in new zealand. samples were taken over 5 years from 328 trees in 43 truffières established with nursery-inoculated trees. mycorrhizae were analysed using a combination of morphological and molecular techniques, focusing on the identification of tuber species. results show that 49% of the trees, and nearly 90% of the truffières, retained t. melanosporum mycorrhizae up to 21 years ... | 2013 | 22752459 |
| survey of microfungi in the landschaftspark duisburg-nord (germany). | during an excursion in the landschaftspark duisburg-nord in 2009 and 2010 we were able to collect and identify more than 100 specimens of microfungi on different parts of cultivated and wild plant species. we found parasitic and saprophytic microfungi on trees, bushes and herbaceous plants. some of them have been observed only rarely until now. most of the collected microfungi species belong to the classes of ascomycetes, basidiomycetes and deuteromycetes - for example leptosphaeria modesta (des ... | 2011 | 22702187 |
| mycorrhization of quercus robur l., quercus cerris l. and corylus avellana l. seedlings with tuber macrosporum vittad. | tuber macrosporum vittad. is not a common truffle species, but with remarkable organoleptic qualities and much economic interest. after the addition of truffle spore slurry, 30 seedlings of quercus robur l., quercus cerris l. and corylus avellana l. were grown inside a greenhouse for 11 months before evaluation of the mycorrhizal level. two different potting mixes were used: a natural soil-based potting mix for q. robur, q. cerris and c. avellana and a peat-based potting mix for q. robur. quercu ... | 2012 | 22565651 |
| light-mediated k(leaf) induction and contribution of both the pip1s and pip2s aquaporins in five tree species: walnut (juglans regia) case study. | understanding the response of leaf hydraulic conductance (k(leaf)) to light is a challenge in elucidating plant-water relationships. recent data have shown that the effect of light on k(leaf) is not systematically related to aquaporin regulation, leading to conflicting conclusions. here we investigated the relationship between light, k(leaf), and aquaporin transcript levels in five tree species (juglans regia l., fagus sylvatica l., quercus robur l., salix alba l. and populus tremula l.) grown i ... | 2012 | 22544048 |
| effect of flooding on c metabolism of flood-tolerant (quercus robur) and non-tolerant (fagus sylvatica) tree species. | flooding is assumed to cause an energy crisis in plants because-due to a lack of o(2)-mitochondrial respiration is replaced by alcoholic fermentation which yields considerably less energy equivalents. in the present study, the effect of flooding on the carbon metabolism of flooding-tolerant pedunculate oak (quercus robur l.) and flooding-sensitive european beech (fagus sylvatica l.) seedlings was characterized. whereas soluble carbohydrate concentrations dropped in roots of f. sylvatica, they we ... | 2012 | 22367762 |
| factors affecting soil fauna feeding activity in a fragmented lowland temperate deciduous woodland. | british temperate broadleaf woodlands have been widely fragmented since the advent of modern agriculture and development. as a result, a higher proportion of woodland area is now subject to edge effects which can alter the efficiency of ecosystem functions. these areas are particularly sensitive to drought. decomposition of detritus and nutrient cycling are driven by soil microbe and fauna coactivity. the bait lamina assay was used to assess soil fauna trophic activity in the upper soil horizons ... | 2012 | 22235311 |
| cross-kingdom interactions matter: fungal-mediated interactions structure an insect community on oak. | ecology letters (2012) abstract: although phytophagous insects and plant pathogens frequently share the same host plant, interactions among such phylogenetically distant taxa have received limited attention. here, we place pathogens and insects in the context of a multitrophic-level community. focusing on the invasive powdery mildew erysiphe alphitoides and the insect community on oak (quercus robur), we demonstrate that mildew-insect interactions may be mediated by both the host plant and by na ... | 2012 | 22221681 |
| modelling the effect of temperature, water activity and ph on the growth of serpula lacrymans. | to predict the risk factors for building infestation by serpula lacrymans, which is one of the most destructive fungi causing timber decay in buildings. | 2011 | 21951641 |
| Liberomyces gen. nov. with two new species of endophytic coelomycetes from broad-leaved trees. | During a study of endophytic and saprotrophic fungi in the sapwood and phloem of broad-leaved trees (Salix alba, Quercus robur, Ulmus laevis, Alnus glutinosa, Betula pendula), fungi belonging to an anamorphic coelomycetous genus not attributable to a described taxon were detected and isolated in pure culture. The new genus Liberomyces with two species, L. saliciphilus and L. macrosporus, is described. Both species have subglobose conidiomata containing holoblastic sympodial conidiogenous cells. ... | 2011 | 21937729 |
| assessment of fly ash-aided phytostabilisation of highly contaminated soils after an 8-year field trial part 2. influence on plants. | aided phytostabilisation is a cost-efficient technique to manage metal-contaminated areas, particularly in the presence of extensive pollution. plant establishment and survival in highly metal-contaminated soils are crucial for phytostabilisation success, as metal toxicity for plants is widely reported. a relevant phytostabilisation solution must limit metal transfer through the food chain. therefore, this study aimed at evaluating the long-term efficiency of aided phytostabilisation on former a ... | 2011 | 21871650 |
| bird predation enhances tree seedling resistance to insect herbivores in contrasting forest habitats. | according to the associational resistance hypothesis, neighbouring plants are expected to influence both the insect herbivore communities and their natural enemies. however, this has rarely been tested for the effects of canopy trees on herbivory of seedlings. one possible mechanism responsible for associational resistance is the indirect impact of natural enemies on insect herbivory, such as insectivorous birds. but it remains unclear to what extent such trophic cascades are influenced by the c ... | 2011 | 21811874 |
| analysis of bac end sequences in oak, a keystone forest tree species, providing insight into the composition of its genome. | one of the key goals of oak genomics research is to identify genes of adaptive significance. this information may help to improve the conservation of adaptive genetic variation and the management of forests to increase their health and productivity. deep-coverage large-insert genomic libraries are a crucial tool for attaining this objective. we report herein the construction of a bac library for quercus robur, its characterization and an analysis of bac end sequences. | 2011 | 21645357 |
| ectomycorrhizal fungal communities of native and non-native pinus and quercus species in a common garden of 35-year-old trees. | non-native tree species have been widely planted or have become naturalized in most forested landscapes. it is not clear if native trees species collectively differ in ectomycorrhizal fungal (emf) diversity and communities from that of non-native tree species. alternatively, emf species community similarity may be more determined by host plant phylogeny than by whether the plant is native or non-native. we examined these unknowns by comparing two genera, native and non-native quercus robur and q ... | 2011 | 21573837 |
| effect of controlled inoculation with specific mycorrhizal fungi from the urban environment on growth and physiology of containerized shade tree species growing under different water regimes. | the aim of this work was to evaluate the effects of selected mycorrhiza obtained in the urban environment on growth, leaf gas exchange, and drought tolerance of containerized plants growing in the nursery. two-year-old uniform acer campestre l., tilia cordata mill., and quercus robur l. were inoculated with a mixture of infected roots and mycelium of selected arbuscular (maple, linden) and/or ectomycorrhiza (linden, oak) fungi and grown in well-watered or water shortage conditions. plant biomass ... | 2011 | 21472449 |
| how reliable is the double-ended pressure sleeve technique for assessing xylem vulnerability to cavitation in woody angiosperms? | the reliability of a double-ended pressure sleeve technique was evaluated on three woody angiosperm species with contrasting maximum vessel lengths. vulnerability curves (vcs) were constructed by varying sample length and the size of the pressure sleeves. vcs were compared against curves obtained with reference techniques. for the two diffuse-porous species, betula pendula and prunus persica, vcs built with shoot segments shorter than maximum vessel length strongly overestimated species vulnerab ... | 2011 | 21401617 |
| fungus symbionts colonizing the galleries of the ambrosia beetle platypus quercivorus. | isolations were made to determine the fungal symbionts colonizing platypus quercivorus beetle galleries of dead or dying quercus laurifolia, castanopsis cuspidata, quercus serrata, quercus crispula, and quercus robur. for these studies, logs from oak wilt-killed trees were collected from kyoto prefecture, japan. fungi were isolated from the: (1) entrances of beetle galleries, (2) vertical galleries, (3) lateral galleries, and (4) the larval cradle of p. quercivorus in each host tree. among the f ... | 2011 | 21384214 |
| regeneration of transgenic plants by agrobacterium-mediated transformation of somatic embryos of juvenile and mature quercus robur. | a protocol was developed for genetic transformation of somatic embryos derived from juvenile and mature quercus robur trees. optimal transformation conditions were evaluated on the basis of the results of transient gus expression assays with five oak embryogenic lines and a strain of agrobacterium tumefaciens (eha105) harbouring a p35sgusint plasmid containing a nptii and a uida (gus) genes. for stable transformation, embryo clumps at globular/torpedo stages (4-10 mg) were inoculated with eha105 ... | 2010 | 20972795 |
| a fast and cost-effective approach to develop and map est-ssr markers: oak as a case study. | expressed sequence tags (ests) are a source of simple sequence repeats (ssrs) that can be used to develop molecular markers for genetic studies. the availability of ests for quercus robur and quercus petraea provided a unique opportunity to develop microsatellite markers to accelerate research aimed at studying adaptation of these long-lived species to their environment. as a first step toward the construction of a ssr-based linkage map of oak for quantitative trait locus (qtl) mapping, we descr ... | 2010 | 20950475 |
| can we predict indirect interactions from quantitative food webs?--an experimental approach. | 1. shared enemies may link the dynamics of their prey. recently, quantitative food webs have been used to infer that herbivorous insect species attacked by the same major parasitoid species will affect each other negatively through apparent competition. nonetheless, theoretical work predicts several alternative outcomes, including positive effects. 2. in this paper, we use an experimental approach to link food web patterns to realized population dynamics. first, we construct a quantitative food ... | 2011 | 20796204 |
| velocity and pattern of ice propagation and deep supercooling in woody stems of castanea sativa, morus nigra and quercus robur measured by idta. | infrared differential thermal analysis (idta) was used to monitor the velocity and pattern of ice propagation and deep supercooling of xylem parenchyma cells (xpcs) during freezing of stems of castanea sativa l., morus nigra l. and quercus robur l. that exhibit a macro- and ring-porous xylem. measurements were conducted on the surface of cross- and longitudinal stem sections. during high-temperature freezing exotherms (htes; -2.8 to -9.4°c), initial freezing was mainly observed in the youngest y ... | 2010 | 20616300 |
| population differentiation of sessile oak at the altitudinal front of migration in the french pyrenees. | to assess the effects of altitude on the level and structure of genetic diversity, a genetic survey was conducted in 12 populations of sessile oak (quercus petraea) located between 130 and 1660 m in two parallel valleys on the northern side of the pyrenees mountains. genetic diversity was monitored at 16 nuclear microsatellite loci and 5 chloroplast dna (cpdna) markers. the cpdna survey suggested that extant populations in both valleys shared the same source populations from the plain. there was ... | 2010 | 20561196 |
| [mycobiota of quercus robur l. from the oak forest in the zhytomyr region]. | different organs of 155 samples of conditionally healthy and sick oaks were examined for mycological contamination. the isolated microscopic fungi belonged to 129 species of different taxonomic groups. the pathogenic complex was represented by 30 fungi species, however most of these species were isolated in single cases. roots, wood, bast and bark were not affected by the phytopathogenic fungi species that can cause the death of the trees. mycobiota of branches and sprouts was similar to that of ... | 2009 | 20458934 |
| changes in leaf phenology of three european oak species in response to experimental climate change. | *because the phenology of trees is strongly driven by environmental factors such as temperature, climate change has already altered the vegetative and reproductive phenology of many species, especially in the temperate zone. here, we aimed to determine whether projected levels of warming for the upcoming decades will lead to linear changes in the phenology of trees or to more complex responses. *we report the results of a 3-yr common garden experiment designed to study the phenological response ... | 2010 | 20406403 |
| ectomycorrhizal identity determines respiration and concentrations of nitrogen and non-structural carbohydrates in root tips: a test using pinus sylvestris and quercus robur saplings. | fine roots play a significant role in plant and ecosystem respiration (rs); therefore, understanding factors controlling that process is important both to advancing understanding and potentially in modelling carbon (c) budgets. however, very little is known about the extent to which ectomycorrhizal (ecm) identity may influence rs or the underlying chemistry that may determine those rates. in order to test these relationships, we examined rs, measured as o(2) consumption, of first-order ecm root ... | 2010 | 20304781 |
| biodiversity and new records of microfungi in the ruhrarea (north rhine westfalia), germany. | during our investigations of the microflora in nrw (duisburg, düsseldorf and essen incl. the greenhouse of the botanical garden) in 2007 and 2008, we were able to collect and identify about 55 species on trees, bushes and ornamental plants as parasites and saprophytes. some of these species are new for germany or have been only rarely found until now. most of the species belong the ascomycotina, basidiomycotina and deuteromycotina for example arthrocladiella mougeotii (lév.) vassilkov. on lycium ... | 2009 | 20222564 |
| development and verification of a water and sugar transport model using measured stem diameter variations. | in trees, water and sugars are transported by xylem and phloem conduits which are hydraulically linked. a simultaneous study of both flows is interesting, since they concurrently influence important processes such as stomatal regulation and growth. a few mathematical models have already been developed to investigate the influence of both hydraulically coupled flows. however, none of these models has so far been tested using real measured field data. in the present study, a comprehensive whole-tr ... | 2010 | 20176887 |
| changing climate and the phenological response of great tit and collared flycatcher populations in floodplain forest ecosystems in central europe. | this study is based on 47 years of observations (1961-2007) on two common bird species, the great tit (parus major) and the collared flycatcher (ficedula albicollis), and a dominant tree species in their habitat, the english oak (quercus robur). the study took place at four research sites in the czech republic located in full-grown, multi-aged floodplain forests with no forestry management. an increase in air temperature over the evaluated period clearly influenced the length of phenological pha ... | 2010 | 20099374 |
| fine root decomposition rates do not mirror those of leaf litter among temperate tree species. | elucidating the function of and patterns among plant traits above ground has been a major research focus, while the patterns and functioning of belowground traits remain less well understood. even less well known is whether species differences in leaf traits and their associated biogeochemical effects are mirrored by differences in root traits and their effects. we studied fine root decomposition and n dynamics in a common garden study of 11 temperate european and north american tree species (ab ... | 2010 | 19882174 |
| ectomycorrhizal fungal communities of pedunculate and sessile oak seedlings from bare-root forest nurseries. | in this study, we present the detailed molecular investigation of the ectomycorrhizal (ecm) community of quercus petraea and quercus robur seedlings grown in bare-root forest nurseries. in all tested oak samples, mycorrhizal colonization was nearly 100%. morphological observation and molecular investigations (sequencing of fungal its rdna) revealed a total of 23 mycorrhizal taxa. the most frequent and abundant fungal taxa were hebeloma sacchariolens, tuber sp., and peziza sp.; from the detected ... | 2010 | 19756776 |
| in vitro anticancer potential of tree extracts from the walloon region forest. | forty-eight extracts from 16 common belgian trees from the walloon region forest were evaluated for in vitro growth inhibitory activity against the human lovo colon cancer, pc3 prostate cancer, and u373 glioblastoma cell lines. our study was performed with the aim of selecting plant candidates in order to later isolate new anticancer compounds from an easily affordable tree material. extracts from alnus glutinosa (stem bark), carpinus betulus (leaves and stem bark), castanea sativa (stem bark), ... | 2009 | 19579185 |
| terpenoid emissions from quercus robur. a case study of galicia (nw spain). | isoprene and monoterpenes emission fluxes emitted by quercus robur seedlings were measured at a leaf scale in the field. isoprene emissions were always predominant over the monoterpene ones, alpha-pinene, beta-pinene and camphene being the most abundant emitted monoterpenes. emission fluxes were normalised at standard conditions of temperature and photosynthetically active radiation, par, (30 degrees c and 1000 micromol m(-2) s(-1) respectively) using temperature and light dependent algorithms. ... | 2009 | 19513459 |
| bacteria associated with oak and ash on a tce-contaminated site: characterization of isolates with potential to avoid evapotranspiration of tce. | along transects under a mixed woodland of english oak (quercus robur) and common ash (fraxinus excelsior) growing on a trichloroethylene (tce)-contaminated groundwater plume, sharp decreases in tce concentrations were observed, while transects outside the planted area did not show this remarkable decrease. this suggested a possibly active role of the trees and their associated bacteria in the remediation process. therefore, the cultivable bacterial communities associated with both tree species g ... | 2009 | 19401827 |
| determination of screw and nail withdrawal resistance of some important wood species. | in this study, screw and nail withdrawal resistance of fir (abies nordmanniana), oak (quercus robur l.) black pine (pinus nigra arnold) and stone pine (pinus pinea l.) wood were determined and compared. the data represent the testing of withdrawal resistance of three types of screws as smart, serrated and conventional and common nails. the specimens were prepared according to ts 6094 standards. the dimensions of the specimens were 5x5x15cm and for all of the directions. moreover, the specimens w ... | 2008 | 19325775 |
| complex climate controls on 20th century oak growth in central-west germany. | we analyze interannual to multi-decadal growth variations of 555 oak trees from central-west germany. a network of 13 pedunculate oak (quercus robur l.) and 33 sessile oak (quercus petraea (matt.) liebl.) site chronologies is compared with gridded temperature, precipitation, cloud-cover, vapor pressure and drought (i.e., palmer drought severity index, pdsi) fluctuations. a hierarchic cluster analysis identifies three groups for each oak species differentiated by ecologic settings. when high prec ... | 2009 | 19203931 |
| comparative study of antioxidant properties and total phenolic content of 30 plant extracts of industrial interest using dpph, abts, frap, sod, and orac assays. | aqueous extracts of 30 plants were investigated for their antioxidant properties using dpph and abts radical scavenging capacity assay, oxygen radical absorbance capacity (orac) assay, superoxide dismutase (sod) assay, and ferric reducing antioxidant potential (frap) assay. total phenolic content was also determined by the folin-ciocalteu method. antioxidant properties and total phenolic content differed significantly among selected plants. it was found that oak (quercus robur), pine (pinus mari ... | 2009 | 19199445 |
| pollen allergenic potential nature of some trees species: a multidisciplinary approach using aerobiological, immunochemical and hospital admissions data. | trees are considered producers of allergenic pollen. the aims of this work were to characterize the aerobiology of the platanus, acer, salix, quercus, betula and populus pollen, linking it with monthly emergency hospital admissions and to identify the different reactivity levels in sensitized patients. this information would be of great importance to evaluate the convenience of changing the inventory of pollen producer trees related to the risk of allergenic reactions. the study was conducted in ... | 2009 | 19147130 |
| validation of the stomatal flux approach for the assessment of ozone visible injury in young forest trees. results from the top (transboundary ozone pollution) experiment at curno, italy. | this paper summarises some of the main results of a two-year experiment carried out in an open-top chambers facility in northern italy. seedlings of populus nigra, fagus sylvatica, quercus robur and fraxinus excelsior have been subjected to different ozone treatments (charcoal-filtered and non-filtered air) and soil moisture regimes (irrigated and non-irrigated plots). stomatal conductance models were applied and parameterised under south alpine environmental conditions and stomatal ozone fluxes ... | 2009 | 19019512 |
| conductimetric analysis of the ion binding properties of three leaf extracts of chestnut (castanea sativa), eucalyptus (eucalyptus globulus) and oak (quercus robur). | humic materials extracted from tree leaves of chestnut (castanea sativa), eucalyptus (eucalyptus globulus) and oak (quercus robur) were analyzed by performing conductimetric titrations. values between about 84 and 236 mus cm(-1) for the molar conductivity and between 0.42 and 0.74 for the charge distribution parameter were obtained when the concentrations of the extract are increased from 40 to 100 mg 1(-1). these variations were explained by using the counterion condensation theory, and the dis ... | 1995 | 18966432 |
| range of phytoplasma concentrations in various plant hosts as determined by competitive polymerase chain reaction. | abstract for competitive polymerase chain reaction (pcr), an internal standard dna template was developed that consisted of a highly conserved, internally deleted 16s rdna fragment of an aster yellows phytoplasma. the internal standard was calibrated using a quantified culture of acholeplasma laidlawii. serial dilutions of the internal standard and fixed amounts of target templates from infected plants were coamplified with the same primers, and the products obtained were quantified using an enz ... | 2000 | 18944479 |
| prediction and mapping of the impact of winter temperature on the development of phytophthora cinnamomi-induced cankers on red and pedunculate oak in france. | abstract phytophthora cinnamomi is the causal agent of a perennial canker that develops on the lower bole on northern red oak and pedunculate oak. the disease has a limited range in europe, being reported only in southwest france. this limited distribution is probably linked to the susceptibility of p. cinnamomi to frost. a model was developed in previous work to estimate the impact of temperatures of <0 degrees c on the winter survival of p. cinnamomi in trunk cortical tissues and on the subseq ... | 2004 | 18943102 |
| comparison of forest edge effects on throughfall deposition in different forest types. | this study examined the influence of distance to the forest edge, forest type, and time on cl-, so4(2-), no3(-), and nh4+ throughfall deposition in forest edges. the forests were dominated by pedunculate oak, silver birch, or corsican/austrian pine, and were situated in two regions of flanders (belgium). along transects, throughfall deposition was monitored at distances of 0-128 m from the forest edge. a repeated-measures analysis demonstrated that time, forest type, and distance to the forest e ... | 2008 | 18783861 |
| phytophthora gallica sp. nov., a new species from rhizosphere soil of declining oak and reed stands in france and germany. | a non-papillate, slow-growing phytophthora species, which could not be assigned to any existing taxon, was isolated from rhizosphere soil of a declining oak in northeast france, and from the rhizosphere of phragmites australis at lake constance in south-west germany in 1998 and 2004, respectively. we describe this species, previously informally designated phytophthora taxon 'g', as phytophthora gallica sp. nov. morphology, growth rates, and pathogenicity against cuttings of riparian tree species ... | 2008 | 18693002 |
| evidence from population genetics that the ectomycorrhizal basidiomycete laccaria amethystina is an actual multihost symbiont. | it is commonly assumed that ectomycorrhizal (ecm) fungi associated with temperate forest tree roots are not host-specific. because this assumption relies on species delineations based on fruitbodies morphology or ribosomal dna sequences, host-specific, cryptic biological species cannot be ruled out. to demonstrate that laccaria amethystina has true generalist abilities, we sampled 510 fruitbodies on three french sites situated 150-450 km away from each other. at each site, populations from monos ... | 2008 | 18489549 |
| spatial population structure of a specialist leaf-mining moth. | 1. the spatial structure of natural populations may profoundly influence their dynamics. depending on the frequency of movements among local populations and the consequent balance between local and regional population processes, earlier work has attempted to classify metapopulations into clear-cut categories, ranging from patchy populations to sets of remnant populations. in an alternative, dichotomous scheme, local populations have been classified as self-sustaining populations generating a sur ... | 2008 | 18422557 |
| new tuber species found in poland. | new information from a survey of truffles carried out in southern part of poland in september 2007 is presented. the fruit bodies of tuber aestivum, t. excavatum, t. rufum and one unidentified tuber sp. were found. the soil chemistry of the five t. aestivum sites was analysed. our inventory showed that t. aestivum prefers the mixed forest with host-trees such as: quercus robur, corylus avellana, carpinus betulus, fagus silvaticus and tilia cordata. selection of local inocula of t. aestivum for t ... | 2008 | 18414906 |