Publications
| Title | Abstract | Year Filter | PMID(sorted descending) Filter |
|---|
| comparative analysis of transcript abundance in pinus sylvestris after challenge with a saprotrophic, pathogenic or mutualistic fungus. | to investigate functional differences in the recognition and response mechanisms of conifer roots to fungi with different trophic strategies, pinus sylvestris l. was challenged with a saprotrophic fungus trichoderma aureoviride rifai. the results were compared with separate studies investigating pine interactions with a pathogen, heterobasidion annosum (fr.) bref. sensu stricto and an ectomycorrhizal symbiont, laccaria bicolor maire (orton). global changes in the expression of 2109 conifer genes ... | 2008 | 18381269 |
| contribution of ambient ozone to scots pine defoliation and reduced growth in the central european forests: a lithuanian case study. | the study aimed to explore if changes in crown defoliation and stem growth of scots pines (pinus sylvestris l.) could be related to changes in ambient ozone (o(3)) concentration in central europe. to meet this objective the study was performed in 3 lithuanian national parks, close to the icp integrated monitoring stations from which data on meteorology and pollution were provided. contribution of peak o(3) concentrations to the integrated impact of acidifying compounds and meteorological paramet ... | 2008 | 18378053 |
| the essential oil qualitative and quantitative composition in the needles of pinus sylvestris l. growing along industrial transects. | the aim of this study was to evaluate composition of the essential oils in the needles of pinus sylvestris growing in the areas affected by a cement factory (cf), and an oil refinery (or). volatile components of the needles were analyzed by gc and gc/ms. the most heavily polluted cf stand had significantly higher concentration of gamma-terpinene, caryophyllene oxide in the current-year needles, while higher concentration of delta-3-carene, alpha-terpinene, gamma-terpinene and terpinolene was doc ... | 2008 | 18372084 |
| climate warming will reduce growth and survival of scots pine except in the far north. | tree growth and survival were assessed in 283 populations of scots pine (pinus sylvestris l.) originating from a broad geographic range and grown at 90 common-garden experimental sites across europe, and in 101 populations grown at 14 sites in north america. growth and survival were analysed in response to climatic transfer distance, the difference in mean annual temperature (mat) between the site and the population origin. differences among populations at each site, and across sites for regiona ... | 2008 | 18363717 |
| [effects of ectomycorrhizal fungi on alleviating the decline of pinus sylvestris var. mongolica plantations on keerqin sandy land]. | based on the observations of air temperature, soil temperature, and root systems of pinus sylvestris var. mongolica plantations on southeastern keerqin sandy land, the decline mechanisms of the plantations were analyzed from the aspect of the effects of temperature on the growth and survival of ectomycorrhizal fungi (ecm). the results indicated that ecm could hardly survive with in 0-5 cm soil layer because of its high temperature environment, but the temperature condition in 20-40 cm soil layer ... | 2007 | 18333441 |
| [estimation of carbon release from shrubs, herbages and litters in daxing' an mountains by forest fires in 1980-1999,]. | by using emission factor (ef), this paper estimated the carbon release and the emission of carbon-containing gases from the shrubs, herbages and litters in main forest types in daxing' an mountains by forest fires in 1980-1999. the results showed that the ef of shrubs, herbages and litters differed in different forest types, with the maximum and minimum ef of co2 being 93.08% and 82.56%, respectively in ledum palustre - larix gmelinii forest and pinus sylvestris var. mongolica forest, the maximu ... | 2007 | 18333434 |
| transcriptional analysis of pinus sylvestris roots challenged with the ectomycorrhizal fungus laccaria bicolor. | symbiotic ectomycorrhizal associations of fungi with forest trees play important and economically significant roles in the nutrition, growth and health of boreal forest trees, as well as in nutrient cycling. the ecology and physiology of ectomycorrhizal associations with pinus sp are very well documented but very little is known about the molecular mechanisms behind these mutualistic interactions with gymnosperms as compared to angiosperms. | 2008 | 18298811 |
| persisting soil drought reduces leaf specific conductivity in scots pine (pinus sylvestris) and pubescent oak (quercus pubescens). | leaf specific conductivity (lsc; the ratio of stem conductivity (k(p)) to leaf area (a(l))), a measure of the hydraulic capacity of the stem to supply leaves with water, varies with soil water content. empirical evidence for lsc responses to drought is ambiguous, because previously published results were subject to many confounding factors. we tested how lsc of similar-sized trees of the same population, under similar climatic conditions, responds to persistently wet or dry soil. scots pine (pin ... | 2008 | 18244940 |
| the potential for using the needle litter of scotch pine (pinus sylvestris l.) as a raw material for particleboard manufacturing. | particleboard panels were made from various wood particle/needle litter of scotch pine (pinus sylvestris l.) mixtures bonded with urea formaldehyde resin. litter was characterized by having higher solubility's in alcohol-benzene, with diluting alkali and hot water, and resulted in lower ph values than those of wood particles. the mechanical properties (modulus of rupture, modulus of elasticity, and internal bond strength) of boards containing up to 6.25% litter were lower than those of panels ma ... | 2008 | 18242082 |
| soil temperature and intermittent frost modulate the rate of recovery of photosynthesis in scots pine under simulated spring conditions. | an earlier onset of photosynthesis in spring for boreal forest trees is predicted as the climate warms, yet the importance of soil vs air temperatures for spring recovery remains to be determined. effects of various soil- and air-temperature conditions on spring recovery of photosynthesis in scots pine (pinus sylvestris) seedlings were assessed under controlled environmental conditions. using winter-acclimated seedlings, photosynthetic responses were followed after transfer to different simulate ... | 2008 | 18181961 |
| photoperiodic control of leaf growth and cambial activity in pinus sylvestris. | 1949 | 18132285 | |
| predicting the decline in daily maximum transpiration rate of two pine stands during drought based on constant minimum leaf water potential and plant hydraulic conductance. | the effect of drought on forest water use is often estimated with models, but comprehensive models require many parameters, and simple models may not be sufficiently flexible. many tree species, pinus species in particular, have been shown to maintain a constant minimum leaf water potential above the critical threshold for xylem embolism during drought. in such cases, prediction of the relative decline in daily maximum transpiration rate with decreasing soil water content is relatively straightf ... | 2008 | 18055437 |
| demographic history has influenced nucleotide diversity in european pinus sylvestris populations. | to infer the role of natural selection in shaping standing genetic diversity, it is necessary to assess the genomewide impact of demographic history on nucleotide diversity. in this study we analyzed sequence diversity of 16 nuclear loci in eight pinus sylvestris populations. populations were divided into four geographical groups on the basis of their current location and the geographical history of the region: northern europe, central europe, spain, and turkey. there were no among-group differe ... | 2007 | 18039881 |
| glacial vicariance in eurasia: mitochondrial dna evidence from scots pine for a complex heritage involving genetically distinct refugia at mid-northern latitudes and in asia minor. | at the last glacial maximum, fennoscandia was covered by an ice sheet while the tundra occupied most of the rest of northern eurasia. more or less disjunct refugial populations of plants were dispersed in southern europe, often trapped between mountain ranges and seas. genetic and paleobotanical evidences indicate that these populations have contributed much to holocene recolonization of more northern latitudes. less supportive evidence has been found for the existence of glacial populations loc ... | 2007 | 18034901 |
| conifer ovulate cones accumulate pollen principally by simple impaction. | in many pine species (family pinaceae), ovulate cones structurally resemble a turbine, which has been widely interpreted as an adaptation for improving pollination by producing complex aerodynamic effects. we tested the turbine interpretation by quantifying patterns of pollen accumulation on ovulate cones in a wind tunnel and by using simulation models based on computational fluid dynamics. we used computer-aided design and computed tomography to create computational fluid dynamics model cones. ... | 2007 | 17986613 |
| screening analyses of pinosylvin stilbenes, resin acids and lignans in norwegian conifers. | the content and distribution of stilbenes and resin acids in scots pine (pinus sylvestris) and spruce (picea abies), sampled in central norway, have been examined. the contents of pinosylvin stilbenes in pine heartwood/living knots were 0.2-2/2-8 %(w/w). no stilbenes could be detected in spruce (picea abies). the resin acid contents of pine sapwood/heartwood and knots were 1-4 and 5-10 % (w/w), respectively. minor amounts of resin acids (<0.2/<0.04 %w/w) were identified in spruce wood/knots. the ... | 2006 | 17962750 |
| the utility of pinus sylvestris l. in dendrochemical investigations: pollution impact of lead mining and smelting in darley dale, derbyshire, uk. | this research investigates atmospheric pollution from an isolated and increasingly productive lead-smelting site by examining the dendrochemistry of pinus sylvestris growing in the local environment and at control sites. tree increment cores and soil in the rooting environment were analysed for lead content. inter-site comparisons of lead-in-soil suggest that contamination of the soil may be a less important pathway for lead inclusion within wood than pathways via bark or needles. levels of lead ... | 2008 | 17959285 |
| determination of roadside noise reduction effectiveness of pinus sylvestris l. and populus nigra l. in erzurum, turkey. | this study was carried out to determine the noise-reduction effectiveness of the pinus sylvestris l. and populus nigra l. trees along the e-80 state highway in erzurum-turkey. noise values were taken at three measurement points; open (without trees and taken as control), the urban forests of pure p. sylvestris l. and p. nigra l. areas, and at four different distances; 0 (near the noise source), 25, 50 and 75 m from the noise source. at the distance of 25 m from the source, the noise value was 78 ... | 2008 | 17957489 |
| high temporal resolution tracing of photosynthate carbon from the tree canopy to forest soil microorganisms. | half of the biological activity in forest soils is supported by recent tree photosynthate, but no study has traced in detail this flux of carbon from the canopy to soil microorganisms in the field. using (13)co(2), we pulse-labelled over 1.5 h a 50-m(2) patch of 4-m-tall boreal pinus sylvestris forest in a 200-m(3) chamber. tracer levels peaked after 24 h in soluble carbohydrates in the phloem at a height of 0.3 m, after 2-4 d in soil respiratory efflux, after 4-7 d in ectomycorrhizal roots, and ... | 2008 | 17944822 |
| effect of vegetation type on throughfall deposition and seepage flux. | this paper compares different vegetation types (coniferous and deciduous forest, grassed and pure heathland) in terms of input (throughfall deposition) and output (seepage flux) in a region with intermediate nitrogen load (+/-20kg nha(-1)y(-1) via bulk precipitation) in comparable conditions in north belgium. coniferous forest (two plots pinus sylvestris and two plots pinus nigra) received significantly higher nitrogen and sulphur throughfall deposition than deciduous forest and heathland. grass ... | 2008 | 17942204 |
| estimating the onset of cambial activity in scots pine in northern finland by means of the heat-sum approach. | we estimated the date of onset (date(est)) of cambial activity by the pinning method in scots pine (pinus sylvestris l.) trees at vanttauskoski (site 1) and laanila (site 2) near the latitudinal limit of scots pine in northern finland. in each year and at each site, observations were made on a different set of five trees. the estimated dates of onset of cambial activity were compared with the corresponding heat sums, calculated in degree-days according to two models. within years, date(est) vari ... | 2008 | 17938119 |
| stored water use and transpiration in scots pine: a modeling analysis with anafore. | we estimated daily use of stored water by scots pine (pinus sylvestris l.) trees growing in a temperate climate with the anafore model (analysis of forest ecosystems) and compared the simulation results with sap flow measurements. the original model was expanded with a dynamic water flow and storage model that simulates sap flow dynamics in an individual tree. anafore was able to accurately simulate diurnal patterns of measured sap flow under microclimatic conditions that differ from those of th ... | 2007 | 17938099 |
| woody plant richness and ndvi response to drought events in catalonian (northeastern spain) forests. | the role of species diversity on ecosystem resistance in the face of strong environmental fluctuations has been addressed from both theoretical and experimental viewpoints to reveal a variety of positive and negative relationships. here we explore empirically the relationship between the richness of forest woody species and canopy resistance to extreme drought episodes. we compare richness data from an extensive forest inventory to a temporal series of satellite imagery that estimated drought im ... | 2007 | 17918405 |
| [research advances in mathematical model of coniferous trees cold hardiness]. | plant cold hardiness has complicated attributes. this paper introduced the research advances in establishing the dynamic models of coniferous trees cold hardiness, with the advantages and disadvantages of the models presented and the further studies suggested. in the models established initially, temperature was concerned as the only environmental factor affecting the cold hardiness, and the concept of stationary level of cold hardiness was introduced. due to the obvious prediction errors of the ... | 2007 | 17886659 |
| kinetic and thermodynamic studies of the biosorption of cr(vi) by pinus sylvestris linn. | biosorption equilibrium, kinetics and thermodynamics of chromium(vi) ions onto cone biomass were studied in a batch system with respect to temperature and initial metal ion concentration. the biosorption efficiency of chromium ions to the cone biomass decreased as the initial concentration of metal ions was increased. but cone biomass of pinus sylvestris linn. exhibited the highest cr(vi) uptake capacity at 45 degrees c. the biosorption efficiency increased from 67% to 84% with an increase in te ... | 2008 | 17875365 |
| rapid changes in the range limits of scots pine 4000 years ago. | paleoecological data provide estimates of response rates to past climate changes. fossil pinus sylvestris stumps in far northern scotland demonstrate former presence of pine trees where conventional pollen evidence of pine forests is lacking. radiocarbon, dendrochronological, and fine temporal-resolution palynological data show that pine forests were present for about four centuries some 4000 years ago; the forests expanded and then retreated rapidly some 70 to 80 kilometers. despite the rapidit ... | 1991 | 17840866 |
| a lead isotopic assessment of tree bark as a biomonitor of contemporary atmospheric lead. | the outermost bark layer of trees, predominantly scots pine (pinus sylvestris), was sampled at 82 non-urban locations from six arbitrarily designated areas (northwest, northeast, central highlands, central and east, central and southwest, southeast), throughout scotland during 2002-2003 and analysed for lead concentration and stable lead isotopes by flame atomic absorption spectrometry (aas) and inductively coupled plasma-mass spectrometry (icp-ms), respectively. the mean lead concentration and ... | 2007 | 17727921 |
| fine root morphological adaptations in scots pine, norway spruce and silver birch along a latitudinal gradient in boreal forests. | variability in short root morphology of the three main tree species of europe's boreal forest (norway spruce (picea abies l. karst.), scots pine (pinus sylvestris l.) and silver birch (betula pendula roth)) was investigated in four stands along a latitudinal gradient from northern finland to southern estonia. silver birch and scots pine were present in three stands and norway spruce was present in all stands. for three fertile norway spruce stands, fine root biomass and number of root tips per s ... | 2007 | 17669752 |
| transcript profiling of a conifer pathosystem: response of pinus sylvestris root tissues to pathogen (heterobasidion annosum) invasion. | the mechanisms underlying defence reactions to a pathogen attack, though well studied in crop plants, are poorly understood in conifers. to analyze changes in gene transcript abundance in pinus sylvestris l. root tissues infected by heterobasidion annosum (fr.) bref. s.l., a cdna microarray containing 2109 ests from p. taeda l. was used. mixed model statistical analysis identified 179 expressed sequence tags differentially expressed at 1, 5 or 15 days post inoculation. in general, the total numb ... | 2007 | 17669735 |
| remediation of heavy metal-contaminated forest soil using recycled organic matter and native woody plants. | the main aim of this study was to determine how the application of a mulch cover (a mixture of household biocompost and woodchips) onto heavy metal-polluted forest soil affects (i) long-term survival and growth of planted dwarf shrubs and tree seedlings and (ii) natural revegetation. native woody plants (pinus sylvestris, betula pubescens, empetrum nigrum, and arctostaphylos uva-ursi) were planted in mulch pockets on mulch-covered and uncovered plots in summer 1996 in a highly polluted scots pin ... | 2007 | 17596623 |
| pronounced ecological separation between two closely related lineages of the polyporous fungus gloeoporus taxicola. | gloeoporus taxicola is a saprotrophic polypore that produces annual fruit bodies, in scandinavia exclusively on coniferous wood. in this study, we demonstrate the existence of two ecotypes of g. taxicola in norway; a coastal lowland form fruiting on dead logs and dying branches of standing pinus sylvestris, and a highland form largely fruiting on trunks of picea abies in moist, old-growth forests. thus, a distinct ecological separation has happened between the two forms both concerning substrate ... | 2007 | 17590324 |
| cloning of pinus sylvestris scarecrow gene and its expression pattern in the pine root system, mycorrhiza and npa-treated short roots. | the scarecrow (scr) gene is central to root radial patterning. its expression has not been investigated in conifers with morphologically different root types. additional interest in scr functions in the pinus sylvestris root system comes from the effect of ectomycorrhiza formation on the short root apical structure. here, the p. sylvestris scr gene (psyscr) was cloned and its expression investigated by northern blot and in situ hybridization of primary, lateral and short roots and mycorrhiza. sh ... | 2007 | 17587372 |
| growth and mycorrhizal community structure of pinus sylvestris seedlings following the addition of forest litter. | we report the effects of pine and oak litter on species composition and diversity of mycorrhizal fungi colonizing 2-year-old pinus sylvestris l. seedlings grown in a bare-root nursery in lithuania. a layer of pine or oak litter was placed on the surface of the nursery bed soil to mimic natural litter cover. oak litter amendment appeared to be most favorable for seedling survival, with a 73% survival rate, in contrast to the untreated mineral bed soil (44%). the concentrations of total n, p, k, c ... | 2007 | 17575001 |
| [characteristics of morphogenesis and growth processes of conifers in the chernobyl nuclear accident zone]. | in the article we present data on the study of morphogenesis and of growth processes of scotch pine (pinus sylvestris l.) and of norwey spruce (picea abies (l.) karst.) vegetative organs after radiation exposure in the chernobyl nuclear accident zone. the anomalies in morphogenesis processes at different absorbed doses are described in detail. it is established that the death of pine forest began under absorbed dose 80-100 gy and more, mass yellowing of needles at 50-60 gy, and maximal morphosis ... | 2007 | 17571730 |
| identification of quantitative trait loci affecting virulence in the basidiomycete heterobasidion annosum s.l. | identification of virulence factors of phytopathogens is important for the fundamental understanding of infection and disease progress in plants and for the development of control strategies. we have identified quantitative trait loci (qtl) for virulence on 1-year-old pinus sylvestris and 2-year-old picea abies seedlings and positioned them on a genetic linkage map of the necrotrophic phytopathogen heterobasidion annosum sensu lato (s.l.), a major root rot pathogen on conifers. the virulence of ... | 2007 | 17569047 |
| 13c discriminations of pinus sylvestris vs. pinus ponderosa at a dry site in brandenburg (eastern germany): 100-year growth comparison. | the carbon isotope composition (delta(13)c, per thousand) and discrimination (delta, per thousand) of old grown north american pinus ponderosa dougl. ex p. et c. laws. and european pinus sylvestris l. were determined using trees grown under almost identical growing conditions in a mixed stand in bralitz, northeast germany. single-tree delta(13)c analyses of tree-ring cellulose of both species were carried out at a yearly resolution for the period 1901-2001 and the results compared with growth (b ... | 2007 | 17558749 |
| intra-annual height increment of pinus sylvestris at high latitudes in finland. | intra-annual height growth of scots pine (pinus sylvestris l.) in four stands was followed for up to four growing seasons (2000-2003) in the northern boreal zone in lapland. elongation of the leader shoot correlated with temperature sum expressed as degree-days. total length of the leader shoot correlated with growth rate but not with duration of the height-growth period. the longer the annual shoot at the end of the season, the greater the height increment per degree- and growing day. height-gr ... | 2007 | 17545134 |
| elevated temperature and co(2) concentration effects on xylem anatomy of scots pine. | we studied the effects of elevated temperature and carbon dioxide concentration ([co(2)]) alone and together on wood anatomy of 20-year-old scots pine (pinus sylvestris l.) trees. the study was conducted in 16 closed chambers, providing a factorial combination of two temperature regimes and two co(2) concentrations (ambient and elevated), with four trees in each treatment. the climate scenario included a doubling of [co(2)] and a corresponding increase of 2-6 degrees c in temperature at the site ... | 2007 | 17545132 |
| anchorage of mature conifers: resistive turning moment, root-soil plate geometry and root growth orientation. | eighty-four mature norway spruce (picea abies l. karst), silver fir (abies alba mill) and scots pine (pinus sylvestris l.) trees were winched over to determine the maximum resistive turning moment (m(a)) of the root-soil system, the root-soil plate geometry, the azimuthal orientation of root growth, and the occurrence of root rot. the calculation of m(a), based on digital image tracking of stem deflection, accounted not only for the force application and its changing geometry, but also for the w ... | 2007 | 17545122 |
| mycorrhizal fungi and ectomycorrhiza associated bacteria isolated from an industrial desert soil protect pine seedlings against cd(ii) impact. | effects of mycorrhization with amanita rubescens or hebeloma sinapizans and dual inoculation with the fungi and ectomycorrhiza associated bacteria (emab) pseudomonas putida or bacillus cereus on seedling growth and accumulation of cd(ii) in pinus sylvestris were studied. both fungal and bacterial species were isolated from roots of pines growing in an industrial area polluted with high concentrations of heavy metals. during mycorrhization, a. rubescens colonized higher number of pine seedlings t ... | 2007 | 17541824 |
| specific and unspecific responses of plants to cold and drought stress. | different environmental stresses to a plant may result in similar responses at the cellular and molecular level. this is due to the fact that the impacts of the stressors trigger similar strains and downstream signal transduction chains. a good example for an unspecific response is the reaction to stressors which induce water deficiency e.g.drought, salinity and cold, especially frost. the stabilizing effect of liquid water on the membrane bilayer can be supported by compatible solutes and speci ... | 2007 | 17536169 |
| assessment of growth and stemwood quality of scots pine on territory influenced by alkaline industrial dust. | long-term influence of alkaline dust (ph 12.3-12.7) pollution emitted over 40 years from a cement plant in estonia was the reason of alkalisation (ph 6.7-7.9) and high concentrations of k, ca and mg in the soil of affected territories. although dust emission has diminished during the last 10 years, the imbalances in nutrition substrate and their influence on the growth of trees are notable up to now. the study of morphological and physical properties of 70-80-year-old scots pine (pinus sylvestri ... | 2008 | 17508259 |
| ectomycorrhizal colonization of naturally regenerating pinus sylvestris l. seedlings growing in different micro-habitats in boreal forest. | we investigated the species richness and composition of ectomycorrhizal (em) fungi colonizing pinus sylvestris l. seedlings naturally regenerating in boreal forest, in three different microhabitats: on forest ground, on decaying stumps, and within moss layer on erratic boulders. we tested the hypothesis that habitat differences would affect the composition of the em community of regenerating pine seedlings. in total, 16 em species were detected, from which none occurred on seedlings growing in a ... | 2007 | 17503091 |
| mistletoe lectin is not the only cytotoxic component in fermented preparations of viscum album from white fir (abies pectinata). | preparations of mistletoe (viscum album) are the form of cancer treatment that is most frequently used in the complementary medicine. previous work has shown that these preparations are able to exert cytotoxic effects on carcinoma cells, the extent of which might be influenced by the host tree species and by the content of mistletoe lectin. | 2007 | 17493268 |
| the effects of heat treatment on some technological properties of scots pine (pinus sylvestris l.) wood. | heat treatment is often applied to wood species to improve their dimensional stability. this study examined the effect of heat treatment on certain mechanical properties of scots pine (pinus sylvestris l.), which has industrially high usage potential and large plantations in turkey. wood specimens obtained from bolu, turkey, were subjected to heat treatment under atmospheric pressure at varying temperatures (120, 150 and 180 degrees c) for varying durations (2, 6 and 10h). the test results of he ... | 2008 | 17482811 |
| long-term fire frequency not linked to prehistoric occupations in northern swedish boreal forest. | knowledge of past fire regimes is crucial for understanding the changes in fire frequency that are likely to occur during the coming decades as a result of global warming and land-use change. this is a key issue for the sustainable management of forest biodiversity because fire regimes may be controlled by vegetation, human activities, and/or climate. the present paper aims to reconstruct the pattern of fire frequency over the holocene at three sites located in the same region in the northern sw ... | 2007 | 17479764 |
| six-year time course of light-use efficiency, carbon gain and growth of beech saplings (fagus sylvatica) planted under a scots pine (pinus sylvestris) shelterwood. | two-year-old fagus sylvatica l. saplings were planted under the cover of a pinus sylvestris l. stand in the french massif central. the stand was differentially thinned to obtain a gradient of transmitted photosynthetically active radiation (par(t); 0-0.35). eighteen fagus saplings were sampled in this gradient, and their growth (basal stem diameter increment) was recorded over six years. over the same period, morphological parameters (leaf area, number and arrangement in space) were monitored by ... | 2007 | 17472934 |
| a sesquineolignan with a spirodienone structure from pinus sylvestris l. | 2007 | 17455178 | |
| plasticity in hydraulic architecture of scots pine across eurasia. | widespread tree species must show physiological and structural plasticity to deal with contrasting water balance conditions. to investigate these plasticity mechanisms, a meta-analysis of pinus sylvestris l. sap flow and its response to environmental variables was conducted using datasets from across its whole geographical range. for each site, a jarvis-type, multiplicative model was used to fit the relationship between sap flow and photosynthetically active radiation, vapour pressure deficit (d ... | 2007 | 17453248 |
| soil co2 efflux in a mixed pine-oak forest in valsaín (central spain). | soil-surface co2 efflux and its spatial and temporal variation were investigated in a southern mediterranean, mixed pine-oak forest ecosystem on the northern slopes of the sierra de guadarrama in spain from february 2006 to july 2006. measurements of soil co2 efflux, soil temperatures, and moisture were conducted in nine 1963-m2 sampling plots distributed in a gradient around the ecotone between pinus sylvestris l. and quercus pyrenaica lam. forest stands. total soil organic matter, walkey-black ... | 2007 | 17450294 |
| changes in the essential oil composition in the needles of scots pine (pinus sylvestris l.) under anthropogenic stress. | unfavorable anthropogenic factors, such as air pollution, lead to biochemical responses in trees. changes in the amounts of secondary metabolites may be early indicators of invisible injuries. the aim of this study was to evaluate composition of the essential oils in the needles of scots pine (pinus sylvestris l.) growing in the areas affected by pollutant emissions of main factories in lithuania: a nitrogen fertilizer factory (nff), a cement factory (cf), and an oil refinery (or). totally, 14 p ... | 2007 | 17450291 |
| did the ambient ozone affect stem increment of scots pines (pinus sylvestris l.) on territories under regional pollution load? step iii of lithuanian studies. | this study aimed to explore if changes in stem increment of scots pines (pinus sylvestris l.) could be related to changes in ambient ozone concentration when the impact of tree dendrometric parameters (age, diameter) and crown defoliation are accounted for. more than 200 dominant and codominant trees from 12 pine stands, for which crown defoliation had been assessed since 1994, were chosen for increment boring and basal area increment computing. stands are located in lithuanian national parks, w ... | 2007 | 17450281 |
| reduction of ethylene emission from scots pine elicited by insect egg secretion. | pinus sylvestris l. is known to activate indirect defence in response to attack by an herbivorous sawfly. egg deposition by the sawfly diprion pini l. induces pine to release, three days after egg laying, locally and systemically terpenoid volatiles that attract parasitoids to kill the eggs. the elicitor of the pine's response is located in the sawfly's oviduct secretion enveloping the eggs after deposition. application of this secretion on twigs with artificially conducted ovipositional woundin ... | 2007 | 17431023 |
| assessing the risk caused by ground level ozone to european forest trees: a case study in pine, beech and oak across different climate regions. | two different indices have been proposed for estimation of the risk caused to forest trees across europe by ground-level ozone, (i) the concentration based aot40 index (accumulated over a threshold of 40 ppb) and (ii) the recently developed flux based afsty index (accumulated stomatal flux above a flux threshold y). this paper compares the aot40 and afsty indices for three forest trees species at different locations in europe. the afsty index is estimated using the do(3)se (deposition of ozone a ... | 2007 | 17412465 |
| evaporative enrichment and time lags between delta18o of leaf water and organic pools in a pine stand. | understanding ecosystem water fluxes has gained increasing attention, as climate scenarios predict a drier environment for many parts of the world. evaporative enrichment of (18)o (delta(18)o) of leaf water and subsequent enrichment of plant organic matter can be used to characterize environmental and physiological factors that control evaporation, based on a recently established mechanistic model. in a pinus sylvestris forest, we measured the dynamics of oxygen isotopic composition (delta(18)o) ... | 2007 | 17407532 |
| harmful effects of atmospheric nitrous acid on the physiological status of scots pine trees. | an open top chamber experiment was carried out in the summer of 2003 to examine the effect of nitrous acid (hono) gas on the physiological status of scots pine saplings (pinus sylvestris). four-year-old pine trees were exposed to two different levels of hono gas (at ca. 2.5 ppb and 5.0 ppb) and a control (filtered air) from early evening to early morning (18:00-6:00), in duplicate open top chambers. significant decreases in the ratios of chlorophylls a to b, an increase in the carbon to nitrogen ... | 2007 | 17400347 |
| wood-decay fungi in fine living roots of conifer seedlings. | the mycorrhizal basidiomycetes are known to have multiple, independent evolutionary origins from saprotrophic ancestors. to date, a number of studies have revealed functional resemblance of mycorrhizal fungi to free-living saprotrophs, but information on the ability of saprotrophic fungi to perform as mycorrhizal symbionts is scarce. here, the objective was to investigate the ability of three wood-decay fungi, phlebiopsis gigantea, phlebia centrifuga and hypholoma fasciculare, to colonize fine r ... | 2007 | 17388906 |
| [studies on diterpenes in needles of pinus sylvestris]. | to research the constituents in needles of pinus sylvestris. | 2006 | 17348188 |
| distribution of cren- and euryarchaeota in scots pine mycorrhizospheres and boreal forest humus. | archaeal 16s rrna gene sequences have been found in a variety of moderate-temperature habitats including soil and rhizospheres. in this study, the differences of archaeal communities associated with scots pine (pinus sylvestris l.) short roots, different types of mycorrhizospheric compartments, and uncolonized boreal forest humus were tested by direct dna extraction, polymerase chain reaction-denaturing gradient gel electrophoresis (pcr-dgge), and sequencing. the results indicated that mycorrhiz ... | 2007 | 17334967 |
| the trophic structure of bark-living oribatid mite communities analysed with stable isotopes ((15)n, (13)c) indicates strong niche differentiation. | the aim of the present study was to identify food sources of bark-living oribatid mites to investigate if trophic niche differentiation contributes to the diversity of bark living oribatida. we measured the natural variation in stable isotope ratios ((15)n/(14)n, (13)c/(12)c) in oribatid mites from the bark of oak (quercus robur), beech (fagus sylvatica), spruce (picea abies) and pine (pinus sylvestris) trees and their potential food sources, i.e., the covering vegetation of the bark (bryophytes ... | 2007 | 17333459 |
| [decline of protective forest and its prevention strategies from viewpoint of restoration ecology: taking pinus sylvestris var. mongolica plantation in zhanggutai as an example]. | aimed at the decline of protective forest in china, and applying the key principles of restoration ecology, such as ecological succession, disturbance, and population density, etc., this paper assessed the rationality of designing elements of protective forest in decision-making level, and analyzed its relationships with the decline of the forest, taking pinus sylvestris var. mongolica plantation in zhanggutai sandy land as an example. it was considered that the disagreement of large-scale affor ... | 2006 | 17330456 |
| soil phosphorus forms as quality indicators of soils under different vegetation covers. | the type of vegetation cover determines the physicochemical and biological properties of the soil over which they are developing. the objective of this study was to determine the effect of different vegetation covers on the forms of soil phosphorus, in order to know which of these forms can be used as a soil quality indicator. the experimental area was located on the acidic plateau at the north of palencia (north spain), where an area was selected vegetation covers very close to each other: pine ... | 2007 | 17307240 |
| afforestation of abandoned farmland with conifer seedlings inoculated with three ectomycorrhizal fungi - impact on plant performance and ectomycorrhizal community. | the aim of a 3-year study was to investigate whether inoculation of pinus sylvestris l. and picea abies (l.) karst. seedlings with mycorrhizas of cenococcum geophilum fr., piceirhiza bicolorata, and hebeloma crustuliniforme (bull.) quel. has any impact on: 1) survival and growth of outplanted seedlings on abandoned agricultural land, and 2) subsequent mycorrhizal community development. for inoculation, the root system of each plant was wrapped in a filter paper containing mycelium, overlaid with ... | 2007 | 17277941 |
| assessment and implications of intraspecific and phenological variability in monoterpenes of scots pine (pinus sylvestris) foliage. | scots pine populations contain individuals with widely differing amounts and composition of monoterpenes and exist as one of two chemotypes: with or without delta3-carene. we investigated the significance for ecological studies of two types of variation in monoterpenes: (1) the inherent variability in the concentration of monoterpenes or their relative amounts in needles of seedlings, saplings, and mature trees; and (2) phenological variation in developing needles. the relative composition of ne ... | 2007 | 17268824 |
| root penetration through sealing layers at mine deposit sites. | to prevent acid mine drainage arising from oxygen and water penetration of sulphide-rich mine tailings, the tailings are covered with layers of dry sealing material. plant roots have a great ability to penetrate dense materials, and if the roots are able to penetrate the sealing layer of a tailings deposit, its oxygen-shielding properties could be reduced. the objective of this study was to evaluate whether plant roots are able to penetrate sealing layers covering mine tailings deposits. root pe ... | 2006 | 17253002 |
| spatial separation of litter decomposition and mycorrhizal nitrogen uptake in a boreal forest. | our understanding of how saprotrophic and mycorrhizal fungi interact to re-circulate carbon and nutrients from plant litter and soil organic matter is limited by poor understanding of their spatiotemporal dynamics. in order to investigate how different functional groups of fungi contribute to carbon and nitrogen cycling at different stages of decomposition, we studied changes in fungal community composition along vertical profiles through a pinus sylvestris forest soil. we combined molecular ide ... | 2007 | 17244056 |
| the radial increment and stemwood element concentrations of scots pine in the area influenced by the narva power plants in northeast estonia. | in the northeastern part of estonia, near the town of narva, there are two large oil shale fueled power plants, baltic pp and estonian pp. on burning oil shale the main atmospheric pollutants are fly ash, sulphur oxides and nitrogen oxides. the radial increment was measured and concentrations of ca and cu were estimated in the stemwood of scots pine (pinus sylvestris l.) from four sites in the influence area of the narva power plants. increment cores were taken also from two sites in an unpollut ... | 2007 | 17242973 |
| developmental and genetic variation in nuclear microsatellite stability during somatic embryogenesis in pine. | genotypic instability is commonly observed in plants derived from tissue culture and is at least partly due to in vitro-induced stress. in this work, the issues of whether genetic instability induced by in vitro stress varies among families and if genetic instability influences the adaptation to in vitro conditions and embryo development have been addressed. by comparing the stability of four variable nuclear microsatellite loci in embryogenic cultures and zygotic embryos of pinus sylvestris, a ... | 2007 | 17237161 |
| temporal trends and spatial distribution of pcdd, pcdf, and pcb in pine and spruce shoots. | in germany, there is a lack of consistent and comparable data for the time dependent behaviour and spatial distribution of dioxin-like and indicator pcb in ambient air, deposition and plants. the aim of this study was to improve the data on pcdd/pcdf, dioxin-like pcb and non dioxin-like pcb in spruce and pine shoots from different locations and years by retrospective monitoring. the survey was conducted with archived samples of one-year old spruce shoots (picea abies) and pine shoots (pinus sylv ... | 2007 | 17222447 |
| total and component carbon fluxes of a scots pine ecosystem from chamber measurements and eddy covariance. | distinguishing between, and quantifying, the different components of ecosystem c fluxes is critical in predicting the responses of ecosystem c cycling to climate change. the aims of this study were to quantify the photosynthetic and respiratory fluxes of a 50-year-old scots pine (pinus sylvestris) ecosystem, and to distinguish respiration of branches with needles from that of stems, and that of soil. | 2007 | 17218344 |
| low nitrification rates in acid scots pine forest soils are due to ph-related factors. | in a previous study, ammonia-oxidizing bacteria (aob)-like sequences were detected in the fragmentation layer of acid scots pine (pinus sylvestris l.) forest soils (ph 2.9-3.4) with high nitrification rates (>11.0 microg g-1 dry soil week-1), but were not detected in soils with low nitrification rates (<0.5 microg g-1 dry soil week-1). in the present study, we investigated whether this low nitrification rate has a biotic cause (complete absence of aob) or an abiotic cause (unfavorable environmen ... | 2007 | 17186151 |
| fire and green-tree retention in conservation of red-listed and rare deadwood-dependent beetles in finnish boreal forests. | habitat loss, fragmentation, and declining habitat quality have created an extinction debt in boreal forests, which could be partly reversed by deliberately improving the habitat quality in managed areas outside reserves. we studied the effects of green-tree retention and controlled burning on red-listed and rare, deadwood-dependent (saproxylic) beetles in a large-scale field experiment in eastern finland. our factorial study design included 24 sites dominated by scots pine (pinus sylvestris l.) ... | 2006 | 17181806 |
| the role of genetic and chemical variation of pinus sylvestris seedlings in influencing slug herbivory. | this study investigated the genetic and chemical basis of resistance of pinus sylvestris seedlings to herbivory by a generalist mollusc, arion ater. using feeding trials with captive animals, we examined selective herbivory by a. ater of young p. sylvestris seedlings of different genotypes and correlated preferences with seedling monoterpene levels. we also investigated the feeding responses of a. ater to artificial diets laced with two monoterpenes, delta(3)-carene and alpha-pinene. logistic re ... | 2007 | 17180371 |
| assessing environmental and physiological controls over water relations in a scots pine (pinus sylvestris l.) stand through analyses of stable isotope composition of water and organic matter. | this study investigated the influence of meteorological, pedospheric and physiological factors on the water relations of scots pine, as characterized by the origin of water taken up, by xylem transport as well as by carbon isotope discrimination (delta13c) and oxygen isotope enrichment (delta18o) of newly assimilated organic matter. for more than 1 year, we quantified delta2h and delta18o of potential water sources and xylem water as well as delta13c and delta18o in twig and trunk phloem organic ... | 2007 | 17177880 |
| enantiomeric monoterpene emissions from natural and damaged scots pine in a boreal coniferous forest measured using solid-phase microextraction and gas chromatography/mass spectrometry. | in order to develop a valuable method for accurate screening of biogenic emissions from undisturbed living plants or for plant-insect interactions, solid-phase microextraction (spme) has been combined with dynamic branch enclosure cuvettes and enantioselective gc/ms. the study was conducted at hyytiälä forest station, finland within a boreal coniferous forest dominated by scots pine (pinus sylvestris). the spme method was optimized for monoterpenes by testing three fibre coatings: polydimethylsi ... | 2007 | 17174316 |
| plant size, not age, regulates growth and gas exchange in grafted scots pine trees. | we studied the effect of scion donor-tree age on the physiology and growth of 6- to 7-year-old grafted scots pine (pinus sylvestris l.) trees (4 and 5 years after grafting). physiological measurements included photosynthethetic rate, stomatal conductance, transpiration, whole plant hydraulic conductance, needle nitrogen concentration and carbon isotope composition. growth measurements included total and component biomasses, relative growth rates and growth efficiency. scion donor trees ranged in ... | 2007 | 17169908 |
| coordination of psas1 and psaspg expression controls timing of re-allocated n utilization in hypocotyls of pine seedlings. | during pine seed germination, a large amount of n mobilized from the storage proteins is re-allocated in the hypocotyl as free asparagine, as a result of the high levels of asparagine synthetase (as) encoded by the psas1 gene. to determine the role of this re-allocated n reserve, a full-length cdna encoding l: -asparaginase (aspg) has been cloned from scots pine (pinus sylvestris l.) seedlings and characterized. like other n-terminal nucleophile hydrolases, pine aspg requires a post-translationa ... | 2007 | 17123103 |
| suillus variegatus causes significant changes in the content of individual polyamines and flavonoids in scots pine seedlings during mycorrhiza formation in vitro. | changes in the concentrations of individual flavonoids and polyamines (pas) in scots pine (pinus sylvestris l.) cotyledonary seedlings were studied during the establishment of an ectomycorrhizal (ecm) symbiosis with two suillus variegatus strains in vitro. both flavonoids and pas were analysed after 3, 7, and 14 d in dual culture, and changes in concentrations were compared with growth of the seedlings. both s. variegatus strains caused similar responses in scots pine seedlings. free putrescine ... | 2007 | 17118971 |
| effects of clear-cutting and soil preparation on natural 15n abundance in the soil and needles of two boreal conifer tree species. | this study presents the impacts of clear-cutting and site preparation on soil and needle 15n-fractionation of scots pine (pinus sylvestris, l.) and norway spruce (picea abies (l.), karst). three microsites on different methods of site preparation were used: (i) mound (broken o/e/b horizons piled upside down over undisturbed humus), (ii) deep (exposed c-horizon) and (iii) shallow (exposed e/b horizon). we found significant differences between species, between closed forest and clear-cuts as well ... | 2006 | 17090488 |
| [seasonal development of phloem in scots pine stems]. | the formation of phloem was studied for two years in stems of 50 to 60 year old trees of scots pine (pinus sylvestris l.) growing in nature. the development of phloem of the current year begins 10 to 20 days before the xylem formation and is completed with the termination of shoot growth in the end of june. observations over the seasonal activity of cambium producing sieve-like cells of phloem and duration of their differentiation as compared to the xylem derivatives of cambium have shown that t ... | 2006 | 17066978 |
| [rhizosphere effects of pinus sylvestris var. mongolica on soil phosphorus transformation]. | to understand the phosphorus (p) mobilization mechanism of mongolian pine (pinus sylvestris var. mongolica) on a p-deficient semi-arid sandy soil of northern china, this paper compared the p fractions and acid phosphomonoesterase (ap) activity in the bulk and rhizosphere soils under different age mongolian pine plantations. the results showed that when compared with the bulk soil, the organic c, labile organic p, and organic c/p ratio increased significantly, microbial and ap activities improved ... | 2006 | 17066687 |
| short delay in timing of emergence determines establishment success in pinus sylvestris across microhabitats. | the date of emergence may have far-reaching implications for seedling performance. seedlings emerging early in the growing season often have a greater rate of survival or grow better if early emergence provides advantages with respect to an environmental cue. as a result, the benefits of early emergence may be lost if the environmental stress creating the differences among cohorts disappears. the experimental manipulation under field conditions of the factors that constitute the main sources of ... | 2006 | 17056614 |
| compound response of marine and terrestrial ecosystems to varying climate: pre-anthropogenic perspective from bivalve shell growth increments and tree-rings. | annual growth increments were examined from shells of the ocean quahog (arctica islandica l.) from northwest norway and from tree-ring samples of the scots pine (pinus sylvestris l.) from nearby coastal areas. the reconstructed annual growth increments were used to compare growth variability in marine and terrestrial ecosystems. spatiotemporal comparison of the growth records showed statistically significant correlation during the 19th century a.d., indicative of ecosystem-independent response t ... | 2007 | 17045331 |
| zinc-tolerant suillus bovinus improves growth of zn-exposed pinus sylvestris seedlings. | scots pine (pinus sylvestris l.) seedlings inoculated or not (nm) by a zn-sensitive or a zn-tolerant isolate of the ectomycorrhizal fungus suillus bovinus (l. fr.) roussel were exposed to 0.1 or 150 mum zn(2+) for 9 months. we hypothesized that inoculation with a zn-tolerant s. bovinus isolate should result in added zn resistance of the host plant. plant and fungal growth as well as nutrient profiles and photosynthetic pigments in pine needles were quantified. in nm plants and in plants colonize ... | 2006 | 17033817 |
| tree species effects on decomposition and forest floor dynamics in a common garden. | we studied the effects of tree species on leaf litter decomposition and forest floor dynamics in a common garden experiment of 14 tree species (abies alba, acer platanoides, acer pseudoplatanus, betula pendula, carpinus betulus, fagus sylvatica, larix decidua, picea abies, pinus nigra, pinus sylvestris, pseudotsuga menziesii, quercus robur, quercus rubra, and tilia cordata) in southwestern poland. we used three simultaneous litter bag experiments to tease apart species effects on decomposition v ... | 2006 | 16995629 |
| mycorrhization helper bacteria: a case of specificity for altering ectomycorrhiza architecture but not ectomycorrhiza formation. | mycorrhization helper bacteria (mhb), isolated from phylogenetically distinct ectomycorrhizal symbioses involving lactarius rufus, laccaria bicolor or suillus luteus, were tested for fungus specificity to enhance l. rufus-pinus sylvestris or l. bicolor-p. sylvestris mycorrhiza formation. as mhb isolated from the l. rufus and s. luteus mycorrhiza were originally characterised using a microcosm system, we assessed their ability to enhance mycorrhiza formation in a glasshouse system in order to det ... | 2006 | 16983568 |
| tree height and age-related decline in growth in scots pine (pinus sylvestris l.). | growth and seasonal water use was measured amongst trees growing in an old growth scots pine forest in the scottish highlands. three sites which differed in their recent management history and contained old and naturally regenerated young trees growing together were monitored in the field. our results showed a clear decrease in growth efficiency with age, from values of around 0.25 kg m(-2) leaves year(-1) in approximately 25-year-old trees to less than 0.1 kg m(-2) leaves year(-1) in trees over ... | 2007 | 16983553 |
| consistency of polyamine profiles and expression of arginine decarboxylase in mitosis during zygotic embryogenesis of scots pine. | in this study, we show that both arginine decarboxylase (adc) protein and mrna transcript are present at different phases of mitosis in scots pine (pinus sylvestris) zygotic embryogenesis. we also examined the consistency of polyamine (pa) profiles with the effective temperature sum, the latter indicating the developmental stage of the embryos. pa metabolism was analyzed by fitting statistical regression models to the data of free and soluble conjugated pas, to the enzyme activities of adc and o ... | 2006 | 16963525 |
| [comparative analysis of genetic heterogeneity of seed progenies in the isolated population of pinus sylvestris var. cretacea kalenicz. ex kom. in donbass]. | the article provides the analysis of the maintenance stability of genetic structure of generatively young and middle-aged trees in seed progenies formed during two years in donbass population of pinus sylvestris var. cretacea kalenicz. ex kom. protected in ukraine. the analysis has been carried out at 10 allozyme loci. allele and genotype diversity of the trees is reproduced annually in seed progenies in spite of the low values of outcrossing coefficient (ts = 0,371-0,687; tm = 0,731-0,790) and ... | 2006 | 16933848 |
| effects of group size and pine defence chemicals on diprionid sawfly survival against ant predation. | the defence chemicals and behavioural adaptations (gregariousness and active defensive behaviour) of pine sawfly larvae may be effective against ant predation. however, previous studies have tested their defences against very few species of ants, and few experiments have explored ant predation in nature. we studied how larval group size (groups of 5 and 20 in neodiprion sertifer and 10, 20 and 40 in diprion pini) and variation in levels of defence chemicals in the host tree (scots pine, pinus sy ... | 2006 | 16924548 |
| ectomycorrhizal weathering of the soil minerals muscovite and hornblende. | ectomycorrhizal fungi are hypothesized to enhance mineral weathering in forest soils. several studies have shown an increased uptake of mineral-derived nutrients by trees when in symbiosis with ectomycorrhizal fungi. however, it is difficult to determine from these studies if the improved nutrient uptake is the result of increased weathering or better exploitation of the substrate by the ectomycorrhizal fungi. in a pot experiment, pinus sylvestris (scots pine) seedlings were grown with or withou ... | 2006 | 16918551 |
| characterization of culturable bacterial populations associating with pinus sylvestris--suillus bovinus mycorrhizospheres. | bacterial isolations were carried out on pinus sylvestris--suillus bovinus mycorrhizospheres obtained directly from boreal pine forest. when samples were taken during dry weather, the numbers of bacterial colony-forming units were significantly higher in uncolonized short roots and external mycelia than in mycorrhizal roots and soil outside the mycorrhizosphere. in contrast, the colony-forming unit counts were similar in all hypogeous samples after rainy weather. culturable bacteria were absent ... | 2006 | 16917536 |
| influence of fungal infection and wounding on contents and enantiomeric compositions of monoterpenes in phloem of pinus sylvestris. | to identify chemical resistant markers induced by fungal or mechanical injury, young trees of scots pine (pinus sylvestris) were subjected to inoculations of blue stain fungi associated with the pine shoot beetles tomicus piniperda and t. minor. among the 20 trees selected for chemical analyses, 16 were divided into four groups: one as control and three were pretreated by wounding only, or by inoculation with either the blue stain fungus leptographium wingfieldii or ophiostoma canum. four wk aft ... | 2006 | 16900432 |
| environmental and developmental effects on the biosynthesis of uv-b screening pigments in scots pine (pinus sylvestris l.) needles. | the major uv-b screening pigments of the epidermal layer of scots pine (pinus sylvestris) needles are flavonol 3-o-glycosides (f3gs) esterified with hydroxycinnamic acids at positions 3" and 6". acylation is the last step in biosynthesis and is catalysed by position-specific hydroxycinnamoyl transferases (3" and 6"hct). the uv-b dependence of these enzyme activities was studied in primary needles of scots pine seedlings grown under different uv-b conditions in environmentally controlled sun simu ... | 2006 | 16898012 |
| polycyclic aromatic hydrocarbons in pine and spruce shoots-temporal trends and spatial distribution. | in the framework of the german environmental specimen bank one-year old spruce shoots (picea abies) and pine shoots (pinus sylvestris) serve as bioindicators for the atmospheric pollution. sampling is performed in two urbanized areas in western and eastern germany (warndt and duebener heide, respectively), and in seven different rural locations. prior to archiving conifer shoots are continuously analyzed for a set of 17 individual polycyclic aromatic hydrocarbons (pahs). the results from the two ... | 2006 | 16896464 |
| [effect of accumulating fluorine and sulphur compounds on the content of chlorophyll in pine needles (pinus sylvestris l.) from some areas of southern poland in 2001-2003]. | concentrations of f(-), s and chlorophyll in needles of pines growing near metallurgical works and power plants were determined. a statistically significant positive correlation between f(-) (in the range of 4.32 to 21.98 microg f(-)/g d.m.) and chlorophyll and a negative correlation between s (in the range of 1094 to 2150 microg s/g d.m.) and chlorophyll was found. this result suggests an antagonistic interaction between f(-) and s in pine needles. | 2004 | 16892589 |
| [long-term effects of different planting proportion on forest landscape in great hing' anling mountains after the catastrophic fire in 1987]. | with landis model, this paper simulated the long-term dynamics of 100% larch (p1) 70% larch and 30% mongolian scotch pine (p2), 50% larch and 50% mongolian scotch pine (p3), 30% larch and 70% mongolian scotch pine (p4), and 100% mongolian scotch pine (p5) in the tuqiang forest bureau at the northern slope of great hing' anling mountains after the catastrophic fire in 1987, taking the forest under natural regeneration as the reference. the results showed that at the early, medium, and late stages ... | 2006 | 16883815 |
| functional traits and plasticity in response to light in seedlings of four iberian forest tree species. | we investigated the differential roles of physiological and morphological features on seedling survivorship along an experimental irradiance gradient in four dominant species of cool temperate-mediterranean forests (quercus robur l., quercus pyrenaica willd., pinus sylvestris l. and pinus pinaster ait.). the lowest photochemical efficiency (f(v)/f(m) in dark-adapted leaves) was reached in deep shade (1% of full sunlight) in all species except q. robur, which had the lowest photochemical efficien ... | 2006 | 16877327 |
| host selection in tomicus piniperda l.: composition of monoterpene hydrocarbons in relation to attack frequency in the shoot feeding phase. | the aim of this study was to investigate the host selection capacity of the pine shoot beetle, tomicus piniperda, in the shoot-feeding phase and analyze the chiral and non-chiral host volatiles by means of gc-ms and 2d-gc in five pinus species originating from france (pinus sylvestris, p. halepensis, p. nigra laricio, p. pinaster maritima, p. pinaster mesogeensis). dominating monoterpenes were (-)-alpha-pinene, (+)-alpha-pinene, (-)-beta-pinene and (+)-3-carene. the amounts of the enantiomers va ... | 2006 | 16869505 |
| [radiation and genetic consequences of ionizing irradiation on population of pinus sylvestris l. within the zone of the chernobyl npp]. | main results of the nineteen year radiation-genetic monitoring of radiobiological, of cytogenetic, and of genetic parameters of pinus sylvestris l. of forest plantation from the chernobyl meltdown area are presented. the acute ionizing irradiation at doses >1 gy induces the formation of morphoses and of depressed growth; at doses >2 gy, the reproductive ability of the trees declined. the radiobiological parameters shown linear or close to it dose-dependence relationship. the acute irradiation at ... | 2006 | 16869158 |