| elevated co2 and ozone reduce nitrogen acquisition by pinus halepensis from its mycorrhizal symbiont. | the effects of 700 µmol mol-1 co2 and 200 nmol mol-1 ozone on photosynthesis in pinus halepensis seedlings and on n translocation from its mycorrhizal symbiont, paxillus involutus, were studied under nutrient-poor conditions. after 79 days of exposure, ozone reduced and elevated co2 increased net assimilation rate. however, the effect was dependent on daily accumulated exposure. no statistically significant differences in total plant mass accumulation were observed, although ozone-treated plants ... | 2001 | 11240914 |
| does tree diversity increase wood production in pine forests? | recent experimental advances on the positive effect of species richness on ecosystem productivity highlight the need to explore this relationship in communities other than grasslands and using non-synthetic experiments. we investigated whether wood production in forests dominated by aleppo pine (pinus halepensis) and pyrenean scots pine (pinus sylvestris) differed between monospecific and mixed forests (2-5 species) using the ecological and forest inventory of catalonia (iefc) database which con ... | 2003 | 12698352 |
| phenolic compounds content in pinus halepensis mill. needles: a bioindicator of air pollution. | foliar phenol concentrations (total and simple phenols) were determined in aleppo pine (pinus halepensis mill.) needles collected in june 2000, from 6 sites affected by various forms of atmospheric pollutants (no, no(2), no(x), o(3) and so(2)) monitored during two months. results show an increase in total phenol content with exposure to sulphur dioxide and a reduction with exposure to nitrogen oxide pollution. p-coumaric acid, syringic acid and 4-hydroxybenzoic acid concentrations increase with ... | 2003 | 12729707 |
| effects of nitrogen deposition on nitrogen cycling in an aleppo pine stand in athens, greece. | high levels of nitrogen deposition measured in throughfall fluxes in 2002, reaching 38 kg ha(-1) year(-1), affected the biogeochemical cycle of n in an aleppo pine (pinus halepensis) stand situated in athens, the capital of greece. the n fluxes in bulk deposition were far lower than those in throughfall indicating high levels of dry deposition in the city of athens. the amounts of n in litterfall and those stored in the forest floor and mineral soil were not high, while the mean residence time o ... | 2004 | 15081728 |
| spatial pattern of ozone injury in aleppo pine related to air pollution dynamics in a coastal-mountain region of eastern spain. | in eastern spain, studies combining the tracking and meso-scale circulations of air pollutants with the evaluation of their effects on plants have been undertaken since 1994. meso-scale processes are very important from the point of view of how and where forest ecosystems are affected by point sources and regional air pollution in the mediterranean area. the first results of these field surveys show that in 1994, 1995 and 1996, the distribution pattern of ozone visual injury (chlorotic mottle) i ... | 2000 | 15092954 |
| association between tree-ring and needle delta13c and leaf gas exchange in pinus halepensis under semi-arid conditions. | associations between delta13c values and leaf gas exchanges and tree-ring or needle growth, used in ecophysiological compositions, can be complex depending on the relative timing of co2 uptake and subsequent redistribution and allocation of carbon to needle and stem components. for palaeoenvironmental and dendroecological studies it is often interpreted in terms of a simple model of delta13c fractionation in c3 plants. however, in spite of potential complicating factors, few studies have actuall ... | 2005 | 15868163 |
| winter photoinhibition in the field involves different processes in four co-occurring mediterranean tree species. | photoinhibition was examined in four co-occurring mediterranean evergreen tree species during two consecutive winters. in response to low temperatures and saturating light, juniperus phoenicea l., pinus halepensis mill., quercus coccifera l. and q. ilex ssp. ballota (desf.) samp. exhibited marked chronic photoinhibition, indicated by low predawn maximal photochemical efficiency of photosystem ii (psii) (fv/fm). low fv/fm values were correlated with high concentrations of xanthophyll cycle compon ... | 2004 | 15234895 |
| fatty acids and ultrastructure of ozone-exposed aleppo pine (pinus halepensis mill.) needles. | fifteen or 18-month-old aleppo pine seedlings were fumigated with different concentrations and doses of ozone over a period of 2-16 days in controlled-environmental growth chambers. the total fatty acid content and ultrastructure of the current year needles were subsequently analysed. in acute, high concentration exposures, significant reductions in the levels of linolenic acid were detected. increases in myristic or palmitic acid were common in needles exposed to lower concentrations of ozone. ... | 1995 | 15091598 |
| geographical variation in water relations, hydraulic architecture and terpene composition of aleppo pine seedlings from italian provinces. | ecotypic variations in leaf conductance, soil-to-leaf hydraulic conductance, components of tissue water potential, hydraulic architecture parameters and xylem embolism were examined in greenhouse-grown two-year-old aleppo pine (pinus halepensis mill.) seedlings from six origins representing the geographic range of the species in italy. cortical resin composition of the seedlings was also determined. measurements were made on well-watered seedlings and on seedlings subjected to recurring severe d ... | 1997 | 14759863 |
| phenols and flavonoids in aleppo pine needles as bioindicators of air pollution. | the aim of the present study is to assess whether certain ecophysiological responses (contents of total phenols, total proanthocyanidins, and total and simple flavonols), in the needles of aleppo pines (pinus halepensis mill.) may be valid bioindicators for the assessment of the air quality. samples were taken at five natural sites polluted by various pollutants (no, no2, other nox, so2, and o3). the results show a decrease in total phenol concentrations with levels of nitrogen oxide pollutions ... | 2003 | 14674550 |
| bioaccumulation of copper, iron, and zinc by pinus halepensis (miller). | | 2005 | 16094884 |
| kenaf (hibiscus cannabinus l.) core and rice hulls as components of container media for growing pinus halepensis m. seedlings. | the feasibility of replacing peat or perlite with rice hulls and ground kenaf core to grow a mediterranean species (pinus halepensis m.), was investigated. treatments involved the following growing media: 70 peat:30 perlite as a control, 70 peat:30 rice hulls, 50 peat:50 rice hulls, kenaf (100%) and 60 kenaf:20 peat:20 rice hulls. the seedlings' quality and the physical and chemical properties of the substrates were evaluated. after this, the seedlings were planted in the field and their field p ... | 2006 | 16203133 |
| enterobacter cloacae, an obligatory endophyte of pollen grains of mediterranean pines. | enterobacter cloacae was found to be associated with the pollen of several mediterranean pines. the bacterium was detected only in mature pollen of pinus halepensis, p. brutia, and p. pinea. e. cloacae is considered to be an obligatory endophyte based on its occurrence in disinfected male cones and the successful inoculation of seedlings of the above 3 species with e. cloacae as1 isolated from pollen of p. halepensis used as a model strain. strain as1 was able to produce indolyl-3-acetic acid (i ... | 2005 | 16295659 |
| studies on the structure of the plant wax nonacosan-10-ol, the main component of epicuticular wax conifers. | the main component presents in the epicuticular waxes of needles of pinus halepensis and the most of conifers, the secondary alcohol nonacosan-10-ol, has been investigated by x-ray diffraction and differential scanning calorimetry. the results obtained from these physical techniques permitted to establish a definitive structural model of the molecular arrangement of this wax, basically in good agreement with the model formulated by other authors from theoretical formulations. biological implicat ... | 2003 | 14599581 |
| complex population genetic structure in the endemic canary island pine revealed using chloroplast microsatellite markers. | the canary archipelago, located on the northwestern atlantic coast of africa, is comprised of seven islands aligned from east to west, plus seven minor islets. all the islands were formed by volcanic eruptions and their geological history is well documented providing a historical framework to study colonization events. the canary island pine ( pinus canariensis c. sm.), nowadays restricted to the westernmost canary islands (gran canaria, tenerife, la gomera, la palma and el hierro), is considere ... | 2003 | 14523525 |
| delta(13)c and tree-ring width reflect different drought responses in quercus ilex and pinus halepensis. | holm oak (quercus ilexl.) and aleppo pine (pinus halepensismill) are representative of two different functional types of trees extensively found in the mediterranean: evergreen sclerophyllous and drought-adapted conifers. the former is considered a partially drought-tolerant species, whereas the latter is a typically drought-avoiding, water-saving species. we postulated that contrasting strategies in response to water deficits in q. ilex and p. halepensis would lead to a differential sensitivity ... | 2003 | 14505023 |
| background ozone monitoring and phytodetection in the greater rural area of corinth--greece. | natural background ozone levels were monitored in three places within the greater rural area of corinth, namely bogdani hill, astronomical observatory of krionerion, and kiato, and compared with ambient ozone monitored in the metropolitan area of athens. measurements were made sequentially, for a few weeks at each place, during the summer of 2000. in addition, ozone phytodetection, using tobacco (nicotiana tabacum l.) plants of the bel-w3 and zichnomirodata varieties, was conducted in 12 places ... | 2003 | 12697182 |
| regulation of phosphoenolpyruvate carboxylase in pinus halepensis needles submitted to ozone and water stress. | effects of ozone and/or drought stresses on phosphoenolpyruvate carboxylase (pepc, ec 4.1.1.31) regulation in pinus halepensis mill. needles were assessed over 3 months in controlled conditions. whereas moderated water stress applied to aleppo pine had no effect on pepc activity compared to the control, which was probably related to the high tolerance of this species to drought, ozone stress induced a dramatic increase of pepc activity in pine needles. this stimulation of the anaplerotic pathway ... | 2003 | 12675734 |
| energy dissipation in drought-avoiding and drought-tolerant tree species at midday during the mediterranean summer. | photosynthetic performance was monitored during two consecutive summers in four co-occurring evergreen mediterranean tree species growing on a south-facing rocky slope. in response to midday water stress, the drought-avoiding species pinus halepensis mill. exhibited marked stomatal closure (g(s)) but no changes in stem water potential (psi(s)), whereas the drought-tolerant species quercus coccifera l., q. ilex ssp. ballota (desf.) samp. and juniperus phoenicea l. displayed declines in midday g(s ... | 2000 | 12651481 |
| molecular characterization and evaluation of mycorrhizal capacity of suillus isolates from central spain for the selection of fungal inoculants. | suillus fungal specimens of pine forests from a mediterranean area of central spain (madrid region) were studied based on molecular and physiological analysis of sporocarps to obtain fungal native inocula to produce mycorrhizal pinus halepensis miller in nursery. variation within the internal transcribed spacer (its) region of the ribosomal rna genes of suillus was examined by restriction fragment length polymorphism (rflp) and direct sequencing of polymerase chain reaction products. ribosomal d ... | 2006 | 16896798 |
| physiological response of pinus halepensis needles under ozone and water stress conditions. | the aim of this study was to evaluate how physiological processes of potted pinus halepensis plants, grown under controlled conditions, were affected by ozone (o3) and/or water stress, integrating the gas exchange and biochemical data with fluorescence ojip polyphasic transient data. plants submitted to only water stress (t1) and with ozone (t3) showed a strong decrease in stomatal conductance and gas exchange, coinciding with a reduction of maximum yield of photochemistry (varphipo) and very ne ... | 2001 | 12060303 |
| simulation of stomatal conductance for aleppo pine to estimate its ozone uptake. | the data from a previous experiment carried out in open-top chambers to assess the effects of ozone (o3) exposure on growth and physiology of aleppo pine (pinus halepensis mill.) were re-assessed to test the performance of the emep o3 stomatal conductance model used to estimate tree o3 uptake at a european scale. aleppo pine seedlings were exposed during three consecutive years to three different o3 treatments: charcoal filtered air, non-filtered air and non-filtered air supplemented with 40 nl ... | 2007 | 17029685 |
| seasonal patterns of non-terpenoid c6-c10 voc emission from seven mediterranean woody species. | the seasonal pattern of non-terpenoid c6-c10 voc emission by seven mediterranean woody species (bupleurum fruticosum, cistus albidus, pinus halepensis, arbutus unedo, erica arborea, quercus coccifera, and q. ilex) was studied under field conditions. branch chamber samples were sorbed on carbotrap and analyzed by thermal desorption in combination with gc-ms. these non-terpenoid c6-c10 voc emissions were large, almost of similar magnitude to those of terpenes. overall, maximum values were recorded ... | 2001 | 11592412 |
| ozone treatment affects pigment precursor metabolism in pine seedlings. | five-week-old seedlings of pinus halepensis mill. and pinus brutia ten. were exposed to air polluted with ozone (o3) (250 nl l-1, 12 h day-1 for 4 days) or to ambient air containing ca 10-20 nl l-1 o3, in the light (180 &mgr;mol m-2 s-1 photosynthetic photon flux density [ppfd], 12 h day-1) and then fed for 24 h in the light (100 &mgr;mol m-2 s-1 ppfd) with various radioactive precursors of chlorophyll (chl) and carotene biosynthesis: 5-[4-14c]-aminolevulinic acid (14c-ala), l-[14c(u)]-glutamic ... | 2001 | 11454235 |
| relationship between carbohydrate concentration and root growth potential in coniferous seedlings from three climates during cold hardening and dehardening. | greenhouse-cultured, container-grown seedlings of aleppo pine (pinus halepensis mill.), radiata pine (pinus radiata d. don), and interior douglas-fir (pseudotsuga menziesii var. glauca (beissn.) franco) were cold acclimated and deacclimated in growth chambers over 24 weeks. needle and root cold hardiness and root growth potential (rgp) were measured weekly. root, needle and stem analyses for soluble sugars and starch were performed biweekly. in all tissues, there was a close correspondence betwe ... | 2000 | 11269961 |
| characterization of nuclear microsatellites in pinus halepensis mill. and their inheritance in p. halepensis and pinus brutia ten. | | 2000 | 11123630 |
| the use of aleppo pine needles as a bio-monitor of heavy metals in the atmosphere. | the needles of aleppo pine (pinus halepensis l.) tree were tested as a possible bio-monitor of heavy metal pollution in amman city, jordan. concentrations of pb, cd, cu and zn were determined in soils, unwashed and washed needles collected from different sites of the city, viz. industrial, residential and on the roadside of a busy high way. the analyte concentrations were compared with that of samples from the control site (uncontaminated area that was 60 km away from amman city). the results of ... | 2007 | 17363145 |
| impacts of urban levels of ozone on pinus halepensis foliage. | between may and september, 1996, seedlings of pinus halepensis were placed at a site adjacent to an automated air pollution monitoring station within the urban area of florence. additional 'control' plants were placed in chambers ventilated with charcoal/purafil(r)-filtered air. all trees were well watered throughout the whole experimental period. during the exposure period, ambient levels of sulphur dioxide were very low, whilst the accumulated hourly exposure to ozone above 40 ppb (i.e. aot40) ... | 2000 | 10927130 |
| antioxidative defense and photoprotection in pinus halepensis induced by mediterranean conditions and ozone exposure. | pigment levels and antioxidative stress-related metabolites were determined over a period of two years in pinus halepensis to characterize the response of some plant protective processes to both environmental stresses and 03 exposure. two-year-old-aleppo pine seedlings were grown in open-top chambers under optimal nutrient and water conditions and exposed to different 03 levels: charcoal filtered air, non-filtered air and nonfiltered air plus 40 ppb o3 10 h/day. in summer an activation of photop ... | 1999 | 10694042 |
| seasonal patterns of terpene content and emission from seven mediterranean woody species in field conditions. | the seasonal pattern of terpene content and emission by seven mediterranean woody species was studied under field conditions. emission rates were normalized at 30 degrees c and 1000 µmol.m.s pfd (photosynthetic photon flux density). bupleurum fruticosum, pinus halepensis, and cistus albidus stored large amounts of terpenes (0.01-1.77% [dry matter]) with maximum values in autumn and minimum values in spring. they emitted large amounts of terpenes (2-40 µg.g dm.h), but with no clear seasonal trend ... | 2000 | 10636836 |
| hypersensitivity to pollen allergens on the adriatic coast. | in central south croatia, i.e., the adriatic coast with the city of split at the center, year-long pollen concentrations in the air were determined for typical local plants, and the area's plant pollination calendar was established. high concentrations of parietaria officinalis pollen dominated during the year (up to 20% from april to june). pollens of pistacia lentiscus, olea europaea, pinus halepensis, juniperus oxycedrus, mimosa and cistus monspeliensis were found in lower concentrations and ... | 1994 | 7921334 |
| implications of foliar terpene content and hydration on leaf flammability of quercus ilex and pinus halepensis. | we investigated the implications of foliar hydration and terpene content on leaf flammability in two widely distributed forest species of the mediterranean basin, quercus ilex, which does not store terpenes, and pinus halepensis, a terpene-storing species. the experiments were carried out in plants grown under different water regimes that generated a wide range of foliar hydration and terpene contents. we monitored the temperatures and time elapsed to reach the smoke, pyrolysis and flame phases. ... | 2008 | 18211552 |
| isozyme variation and heterozygosity in pinus halepensis l. | the genetic polymorphism of a population of pinus halepensis was studied using 12 electrophoretically detectable enzyme systems encoded by 7 monomorphic and 10 polymorphic loci. an estimation of population parameters revealed a relatively high average heterozygosity (h = 0.179). the total variation present in the population was partitioned into a high amount of genetic variation within groups, with only 1.3-4.4% of the total variation resulting from genic differences among groups. | 1983 | 6870776 |
| ultrasound-assisted removal of malachite green from aqueous solution by dead pine needles. | the dead needles of aleppo pine (pinus halepensis) were tested as a possible sorbent for the removal of malachite green from aqueous solutions in the absence and presence of ultrasound. batch process was employed for sorption kinetic and equilibrium studies. sorption experiments indicated that the sorption capacity was dependent of operating variables. both the rate and the amount of malachite green sorption are markedly increased in the presence of the ultrasonic field. the dye removal with the ... | 2008 | 18296099 |
| morphological and physiological damage by surfactant-polluted seaspray on pinus pinea and pinus halepensis. | this paper reports morphological and physiological damage caused by polluted seaspray to coastal pine forests in liguria (northern italy) and suggests the most reliable parameters for surfactant-pollution biomonitoring. concentrations of surfactants in surface seawater, seaspray, and that deposited on pinus halepensis and pinus pinea needles were determined in samples from five sites. decline of the pines in the western part of liguria was greater than in the east, and was associated with higher ... | 2005 | 15952519 |
| fatty acid composition of two tunisian pine seed oils. | oils were extracted from fully ripen pinus pinea l. and pinus halepensis mill seeds and fatty acid composition has been established by capillary gas chromatography. seeds are rich in lipids, 34.63-48.12% on a dry weight basis. qualitatively, fatty acid composition of both species is identical. for p. halepensis linoleic acid is the major fatty acid (56.06% of total fatty acids) followed by oleic (24.03%) and palmitic (5.23%) acids. for p. pinea, the same fatty acids are found with the proportion ... | 2005 | 15932286 |
| the geographic selection mosaic for squirrels, crossbills and aleppo pine. | the interactions between many species are structured in a geographic mosaic of populations among which selection is divergent. here we tested the hypothesis that such a geographic selection mosaic arises for common crossbills (loxia curvirostra) feeding on seeds in the cones of aleppo pine (pinus halepensis) because of geographic variation in the occurrence of european red squirrels (sciurus vulgaris). on the iberian peninsula, sciurus exerted directional selection favouring larger cones with la ... | 2005 | 15715841 |
| biodiversity of the chemical constituents in the epiphytic lichenized ascomycete ramalina lacera grown on difference substrates crataegus sinaicus, pinus halepensis, and quercus calliprinos. | the identification and evaluation of lichen metabolite production by the epiphytic lichenized ascomycete ramalina lacera collected from different substrates: crataegus sinaicus, pinus halepensis, and quercus calliprinos. | 2008 | 19219208 |
| 'candidatus phytoplasma pini', a novel taxon from pinus silvestris and pinus halepensis. | pinus silvestris and pinus halepensis trees grown in germany and spain, respectively, showing abnormal shoot branching, dwarfed needles and other symptoms were examined for the presence of plant-pathogenic mollicutes (phytoplasmas). while phytoplasmas could not be detected unambiguously with microscopical methods, pcr amplification using universal phytoplasma primers yielded positive results. samples collected from symptomatic and non-symptomatic plant parts of both symptomatic pinus silvestris ... | 2005 | 15653891 |
| seasonal carbon storage and growth in mediterranean tree seedlings under different water conditions. | in all mediterranean-type ecosystems, evergreen and deciduous trees differing in wood anatomy, growth pattern and leaf habit coexist, suggesting distinct adaptative responses to environmental constraints. this study examined the effects of summer water stress on carbon (c) storage and growth in seedlings of three coexisting mediterranean trees that differed in phenology and wood anatomy characteristics: quercus ilex subsp. ballota (desf.) samp., quercus faginea lam. and pinus halepensis l. seedl ... | 2009 | 19574258 |
| hypersensitivity to pollen allergens on the adriatic coast. | this paper describes a study of air concentrations of pollens and a calendar of pollination around the town of split on the croatian adriatic in 1994. high pollen concentrations of parietaria officinalis dominated during the year (up to 20% from april to june) followed by the pollens of pistacia lentiscus, olea europaea, pinus halepensis, juniperus oxycedrus, acacia baileyana, artemisia vulgaris, ambrosia elatior and cistus monspeliensis. in 1994-95, skin prick tests using commercially available ... | 2004 | 15285462 |
| compensation processes of aleppo pine (pinus halepensis mill.) to ozone exposure and drought stress. | a long-term experiment was performed to study the effects of o3 and drought-stress (ds) on aleppo pine seedlings (pinus halepensis mill.) exposed in open-top chambers. ozone reduced gas exchange rates, ribulose-1,5-biphosphate carboxylase/oxygenase activity (rubisco), aboveground c and needle n concentrations and c/n ratio and ca concentrations of the twigs under 3 mm (twigs<3) and the aerial biomass. also it increased phosphoenolpyruvate carboxylase (pepc) and n and k concentrations of the twig ... | 2005 | 16005763 |
| trace element accumulation in the moss hypnum cupressiforme hedw. and the trees quercus ilex l. and pinus halepensis mill. in catalonia. | we studied trace element accumulation in the moss hypnum cupressiforme and the widely distributed mediterranean trees quercus ilex and pinus halepensis located at increasing distances from the barcelona metropolitan area. hypnum cupressiforme, quercus ilex and, to a somewhat lesser extent, pinus halepensis, have proved to be adequate as possible accumulative monitoring species in relation to trace elements pollution. no significant effects of crown orientation were found. one-year old leaves gen ... | 2005 | 16018901 |
| case study: inorganic pollutants associated with particulate matter from an area near a petrochemical plant. | the area of gela (sicily, italy) contains one of the largest petroleum refineries in europe and also has several oil fields both on land and offshore. this paper discusses how the oil refinery and traffic-related air pollution affect the chemical composition of airborne particulate matter over the town of gela, using pine needles and urban road dust as the means of survey. forty-one samples of pine needles from pinus halepensis (mill.) and two composite samples of roadway dust, each subdivided i ... | 2005 | 16053924 |
| colonisation of pinus halepensis roots by pseudomonas fluorescens and interaction with the ectomycorrhizal fungus suillus granulatus. | colonisation of pinus halepensis roots by gfp-tagged pseudomonas fluorescens aur6 was monitored by epifluorescence microscopy and dilution plating. aur6-gfp was able to colonise and proliferate on p. halepensis roots. co-inoculation with the ectomycorrhizal fungus suillus granulatus did not affect the bacterial colonisation pattern whereas it had an effect on bacterial density. bacterial counts increased during the first 20 days of seedling growth, irrespective of seedlings being mycorrhizal or ... | 2004 | 16329878 |
| molecular markers detecting an ectomycorrhizal suillus collinitus strain on pinus halepensis roots suggest successful inoculation and persistence in mediterranean nursery and plantation. | survival of the ectomycorrhizal fungal strain suillus collinitus sc-32 on pinus halepensis after inoculation and outplanting was monitored in a mediterranean plantation. three molecular fingerprints were developed: rflp of the internal transcribed spacer ribosomal dna, intersimple sequence repeat, and a specific sequence-characterized amplified region marker. the inoculant was demonstrated to survive on inoculated seedlings 4 years after outplanting (56 months after inoculation), although s. col ... | 2006 | 16420623 |
| a common mode of attraction of larvae and adults of insect predators to the sex pheromone of their prey (hemiptera: matsucoccidae). | the attraction of several adult predators, genera elatophilus, hemerobius and sympherobius, to the sex pheromones of pine bast scales, matsucoccus cockerell, has already been demonstrated. here, the hypothesis that the larvae of these predators are similarly attracted to the host prey sex pheromone is tested. the response of predators was tested in field trials using pine tree arenas baited with the sex pheromones of m. josephi bodenheimer & harpaz, m. feytaudi ducasse and m. matsumurae kuwana. ... | 2006 | 16556339 |
| response of pinus halepensis mill. seedlings to biosolids enriched with cu, ni and zn in three mediterranean forest soils. | we investigated the response of pinus halepensis seedlings to the application of biosolids enriched with cu, ni and zn on three mediterranean forest soils under semiarid conditions. one-year-old seedlings were planted in lysimeters on soils developed from marl, limestone and sandstone which were left unamended, amended with biosolids, or amended with biosolids enriched in cu, ni and zn. enriched biosolids increased plant heavy metal concentration, but always below phytotoxic levels. seedlings re ... | 2007 | 16678319 |
| the use of compost in afforestation of mediterranean areas: effects on soil properties and young tree seedlings. | in mediterranean frequently burnt areas, fire and erosion result in the decrease of soil fertility, so afforestation is a major concern. we carried out an in situ experiment of compost amendment to improve survival and growth of planted tree seedlings. one-year-tree seedlings of native species (quercus ilex, pinus halepensis and pinus pinea) were planted on a frequently burnt calcareous site. three rates of fresh co-composted sewage sludge and greenwastes (control without compost, 20 and 40 kg m ... | 2006 | 16762400 |
| sensitivity of mediterranean woody seedlings to copper, nickel and zinc. | the restoration of heavy metal contaminated areas requires information on the response of native plant species to these contaminants. the sensitivity of most mediterranean woody species to heavy metals has not been established, and little is known about phytotoxic thresholds and environmental risks. we have evaluated the response of four plant species commonly used in ecological restoration, pinus halepensis, pistacia lentiscus, juniperus oxycedrus, and rhamnus alaternus, grown in nutrient solut ... | 2007 | 16870229 |
| leptographium tereforme sp. nov. and other ophiostomatales isolated from the root-feeding bark beetle hylurgus ligniperda in california. | the redhaired pine bark beetle hylurgus ligniperda (f.) is native to europe but was discovered in los angeles, california, in 2003. this root-and stump-feeding beetle is a common vector of ophiostomatales, which are potential tree pathogens or causes of blue stain of conifer sapwood. in this study ophiostomatales were isolated on a cycloheximide-amended medium from 118 adult h. ligniperda collected from infested logs of pinus halepensis and p. pinea at two sites in california. in total eight spe ... | 2010 | 20943533 |
| the biogenic volatile organic compounds emission inventory in france: application to plant ecosystems in the berre-marseilles area (france). | an inventory describing the fluxes of volatile organic compounds (vocs), isoprene and monoterpenes, and other vocs (ovocs) from the biosphere to the atmosphere, has been constructed within the framework of the escompte project (field experiments to constrain models of atmospheric pollution and transport of emissions). the area concerned, located around berre-marseilles, is a mediterranean region frequently subject to high ozone concentrations. the inventory has been developed using a fine scale ... | 2006 | 17011024 |
| the strait of gibraltar as a major biogeographic barrier in mediterranean conifers: a comparative phylogeographic survey. | the strait of gibraltar (sg) is reputed for being both a bridge and a geographic barrier to biological exchanges between europe and africa. major genetic breaks associated with this strait have been identified in various taxa, but it is unknown whether these disjunctions have been produced simultaneously or by independent biogeographic processes. here, the genetic structure of five conifers distributed on both sides of the sg was investigated using mitochondrial (nad1 b/c, nad5-1, nad5-4 and nad ... | 2010 | 21073588 |
| analysis of spatial genetic structure in an expanding pinus halepensis population reveals development of fine-scale genetic clustering over time. | we analysed the change of spatial genetic structure (sgs) of reproductive individuals over time in an expanding pinus halepensis population. to our knowledge, this is the first empirical study to analyse the temporal component of sgs by following the dynamics of successive cohorts of the same population over time, rather than analysing different age cohorts at a single time. sgs is influenced by various factors including restricted gene dispersal, microenvironmental selection, mating patterns an ... | 2006 | 17032261 |
| water deficit stress induces different monoterpene and sesquiterpene emission changes in mediterranean species. relationship between terpene emissions and plant water potential. | the effects of water deficit stress and plant water potential (psi) on monoterpene and sesquiterpene leaf emissions from rosmarinus officinalis, pinus halepensis, cistus albidus and quercus coccifera were studied over 11 days of water withholding (from t(1) to t(11)), after substrates had achieved their field capacity (control pots: t(0)). volatile compounds were sampled from the same twig per plant all throughout the study, using a dynamic bag enclosure system. volatiles, collected in tenax ta, ... | 2007 | 17156816 |
| distribution and sources of pahs using three pine species along the ebro river. | needles of three pine species (pinus halepensis, pinus pinea and pinus nigra) were analysed to assess the occurrence of polycyclic aromatic hydrocarbons (pahs) in 34 sites located throughout the ebro river, in northeast spain. overall, the concentration varied between 55 and 808 ng g(?-?1) (dry weight). the three- and four-ring pahs were the most representative, with phenanthrene having 43% of the total pah load and naphthalene showing a high incidence in rural areas. despite matrix apparent sim ... | 2011 | 21465131 |
| pinus halepensis invasion in mountain pampean grassland: effects of feral horses grazing on seedling establishment. | we evaluated the mechanisms that determine the increasing abundance of pinus halepensis in mountain pampean grasslands in argentina that is associated with the continuous presence of feral horses. we hypothesized that direct and indirect effects of feral horse grazing on grassland may affect the establishment of p. halepensis. we conducted a field experiment to evaluate this hypothesis, studying the response of seedling emergence, survival and growth to herbaceous vegetation defoliation and soil ... | 2011 | 21477801 |
| effect of intraspecific competition and substrate type on terpene emissions from some mediterranean plant species. | competition is an important factor that has been extensively reported in the mediterranean area. there is evidence that leaf terpene accumulation may vary between plants growing on calcareous and siliceous soils. in the present study, leaf terpene emissions from potted seedlings of pinus halepensis, cistus albidus, and quercus coccifera, growing under natural environmental conditions on calcareous and siliceous substrates, were studied by using a bag enclosure method. in both substrates, seedlin ... | 2007 | 17195116 |
| plant coexistence alters terpene emission and content of mediterranean species. | there is evidence that secondary metabolism may modulate plant interactions and is modified by different biotic stress agents, such as herbivores or pathogens. however, it is poorly understood whether secondary metabolism is altered during competition among plants. the intraspecific and interspecific coexistence of some mediterranean potted seedlings, namely rosmarinus officinalis, pinus halepensis, cistus albidus and quercus coccifera was investigated through their terpene accumulation within l ... | 2007 | 17258247 |
| use of dendrochronological method in pinus halepensis to estimate the soil erosion in the south east of madrid (spain). | the rate of soil erosion in pine forests (pinus halepensis) located in the southeast of madrid has been estimated using dendrochronological analysis based on the change in ring-growth pattern from concentric to eccentric when the root is exposed. using 49 roots spread across five inclined areas, it has been found that the length and direction of the hillsides, as well as their vegetation cover affect the rate of erosion, while the slope itself does not. the erosion rates found for the different ... | 2007 | 17379273 |
| invasion of pinus halepensis mill. following a wildfire in an argentine grassland nature reserve. | the ernesto tornquist nature reserve is a relict of native pampas vegetation in argentina. alien trees were introduced to the reserve in the 1950s, mainly to "improve" the natural landscape, resulting in the arrival of a totally new life form. in 1987, a fire affected an area planted with pinus halepensis resulting in its massive expansion. in 1999, we removed trees from 17 circular plots of 10 m diameter placed systematically within the area that was colonized after the fire. trunks were cut 20 ... | 2008 | 17467146 |
| inoculation of pinus halepensis mill. with selected ectomycorrhizal fungi improves seedling establishment 2 years after planting in a degraded gypsum soil. | vegetative inoculum of amanita ovoidea (bull.) link and three isolates of suillus collinitus (fr.) kuntze, as well as spore inoculum of rhizopogon roseolus (corda) th. m. fr. and s. collinitus, were evaluated for the production of pinus halepensis mill. in nursery and for the establishment of seedlings in a degraded gypsum soil. in nursery, most of the fungi significantly improved the height of seedlings and modified the accumulation of nutrients in needles. the percentage of ectomycorrhizas (es ... | 2007 | 17874144 |
| 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 |
| sensitivity of terpene emissions to drought and fertilization in terpene-storing pinus halepensis and non-storing quercus ilex. | we studied the effects of water stress, fertilization and time course on foliar volatile terpene emission rates by quercus ilex and pinus halepensis in a garden experiment. the terpenes mostly emitted by both species were alpha-pinene, beta-pinene, beta-myrcene and delta(3)-carene. p. halepensis emission rates (average 31.45 microg g(-1) dm h(-1)) were similar to those of q. ilex (average 31.71 microg g(-1) dm h(-1)). the effects of drought (reduction to one-third of full watering) and fertiliza ... | 2007 | 18251893 |
| physiology-phenology interactions in a productive semi-arid pine forest. | this study explored possible advantages conferred by the phase shift between leaf phenology and photosynthesis seasonality in a semi-arid pinus halepensis forest system, not seen in temperate sites. leaf-scale measurements of gas exchange, nitrogen and phenology were used on daily, seasonal and annual time-scales. peak photosynthesis was in late winter, when high soil moisture, mild temperatures and low leaf vapour pressure deficit (d(l)) allowed high rates associated with high water- and nitrog ... | 2008 | 18331428 |
| production and diversity of volatile terpenes from plants on calcareous and siliceous soils: effect of soil nutrients. | fertilizer effects on terpene production have been noted in numerous reports. in contrast, only a few studies have studied the response of leaf terpene content to naturally different soil fertility levels. terpene content, as determined by gas chromatography/mass spectrometry/flame ionization detector, and growth of pinus halepensis, rosmarinus officinalis, and cistus albidus were studied on calcareous and siliceous soils under field conditions. the effect of nitrogen (n) and extractable phospho ... | 2008 | 18670820 |
| water stress responses of two mediterranean tree species influenced by native soil microorganisms and inoculation with a plant growth promoting rhizobacterium. | soil microorganisms, such as plant growth-promoting rhizobacteria (pgpr), play crucial roles in plant growth, but their influence on plant water relations remains poorly explored. we studied the effects of native soil microorganisms and inoculation with the pgpr strain aur6 of pseudomonas fluorescens on water stress responses of seedlings of the drought-avoiding pinus halepensis mill. and the drought-tolerant quercus coccifera l. plant growth, nutrient concentrations and physiology (maximum phot ... | 2008 | 18765374 |
| description of bakernema dauniense n. sp. (nematoda: criconematidae) from italy. | bakernema dauniense n. sp., a bisexual species from the rhizosphere of pinus halepensis mill. in italy, is described and illustrated. primary differentiating characteristics of the female are body annules bearing short, membranous projections 1.4-2.2 mum long, an anterior vulval lip slightly overlapping the posterior, and a linearly arcuate vagina. the juvenile differs markedly from adults by having annules with a beaded margin, which lack membranous projections. generic and specific relationshi ... | 1992 | 19283202 |
| variations in allelochemical composition of leachates of different organs and maturity stages of pinus halepensis. | we investigated changes in the occurrence of allelochemicals from leachates of different pinus halepensis organs taking into account the stages of pine stand age (i.e., young < 15-years-old, middle age +/- 30-years, and old > 60-years-old). gc-ms analysis of aqueous extracts revealed approx. 59 components from needles and roots. the major constituents were divided into different phytochemical groups-phenolics (50%), fatty acids (44%), and terpenoids. further analyses were carried out to characte ... | 2009 | 19629599 |
| patterns of polymorphism resulting from long-range colonization in the mediterranean conifer aleppo pine. | *the evolutionary outcomes of range expansion/contraction depend on the biological system considered and the interactions among the evolutionary forces in place. in this study, we examined the demographic history and the local polymorphism patterns of candidate genes linked to drought tolerance of a widespread mediterranean conifer (pinus halepensis). *to that end, we used cpssrs and coalescence modelling of nuclear genes to infer the demographic history of natural populations covering the speci ... | 2009 | 19732348 |
| equilibrium and kinetics of cadmium adsorption from aqueous solutions using untreated pinus halepensis sawdust. | untreated pinus halepensis sawdust has been investigated as an adsorbent for the removal of cadmium from aqueous solutions. batch experiments were carried out to investigate the effect of ph, adsorbent dose, contact time, and metal concentration on sorption efficiency. the favorable ph for maximum cadmium adsorption was at 9.0. for the investigated cadmium concentrations (1-50mg/l), maximum adsorption rates were achieved almost in the 10-20 min of contact. an adsorbent dose of 10 g/l was optimum ... | 2010 | 19735976 |
| plastic bimodal xylogenesis in conifers from continental mediterranean climates. | *seasonal radial-increment and xylogenesis data can help to elucidate how climate modulates wood formation in conifers. few xylogenesis studies have assessed how plastic xylogenesis is in sympatric conifer species from continental mediterranean areas, where low winter temperatures and summer drought constrain growth. *here, we analysed intra-annual patterns of secondary growth in sympatric conifer species (juniperus thurifera, pinus halepensis and pinus sylvestris). two field sites (xeric and me ... | 2010 | 19895415 |
| environmental benefits of using magnesium carbonate minerals as new wildfire retardants instead of commercially available, phosphate-based compounds. | a serial batch leaching experiment has been carried out to evaluate the release of elements from the ash of pinus halepensis needles burned under two test conditions-with and without treatment of the forest species with the carbonate minerals (huntite and hydromagnesite) in aqueous solution (ph 6). the ash (before and after leaching) and leachates were analyzed using atomic absorption spectroscopy and x-ray diffraction. compared with data from samples treated with the commercially available, pho ... | 2010 | 20033757 |
| sensitivity to zinc of mediterranean woody species important for restoration. | heavy metals have increased in natural woodlands and shrublands over the last several decades as a consequence of anthropogenic activities. however, our knowledge of the effects of these elements on woody species is scarce. in this study, we examined the responses of six mediterranean woody species to increasing levels of zinc in hydroponic culture and discussed the possible implications for the restoration of contaminated sites. the species used, pinus pinea l., pinus pinaster ait., pinus halep ... | 2010 | 20189221 |
| visible and microscopic needle alterations of mature aleppo pine (pinus halepensis) trees growing on an ozone gradient in eastern spain. | visible injuries and 42 microscopic features of tissue and cell structure were quantified in needles of mature aleppo pine (pinus halepensis) growing at four field sites located on a natural ozone gradient in eastern spain. principal component analysis was used to find out if the forest sites differed from each other, to determine the reasons for the site differences and to evaluate the relations between the parameters studied. in previous-year needles, the first principal component (pc) was des ... | 2010 | 20215119 |
| two new media pinus halepensis seed agar and blackberry agar for rapid identification of cryptococcus neoformans. | abstract cryptococcus neoformans is an encapsulated yeast-like fungus that causes life-threatening infections, particularly in immunocompromised patients. the formation of brown pigment on many media described in the literature, such as that in niger seed (guizotia abyssinica) agar, has been used to identify c. neoformans. the present study compares melanin production by clinical and environmental isolates of c. neoformans and other medically important yeast on two new media, pinus halepensis se ... | 2010 | 20406400 |
| plant and soil carbon accumulation following fire in mediterranean woodlands in spain. | we measured plant and soil carbon (c) storage following canopy-replacing wildfires in woodlands of northeastern spain that include an understory of shrubs dominated by quercus coccifera and an overstory of pinus halepensis trees. established plant succession models predict rapid shrub recovery in these ecosystems, and we build on this model by contrasting shrub succession with long-term c storage in soils, trees, and the whole ecosystem. we used chronosequence and repeated sampling approaches to ... | 2010 | 20499102 |
| chios mastic, a natural supplement for zinc to enhance male sexuality and prostate function. | mastic is a natural resin extracted from the stem of the evergreen tree pistacia lentiscus var. chia (duham) (anacardiaceae). for a long time, mastic has been esteemed for its aphrodisiac properties. to test this hypothesis, the trace element zinc was determined while the quantity released after a certain time of chewing was studied. for comparison, three commercial chewing-gums were analyzed as well. a portion of natural mastic or commercial gum was uniformly chewed for 1, 2, 3, and 4 h and the ... | 2010 | 20645755 |
| genetic signals of ancient decline in aleppo pine populations at the species' southwestern margins in the mediterranean basin. | microsatellite markers were used to characterize the structure of genetic diversity in natural moroccan aleppo pine (pinus halepensis mill.) populations, the most southwesterly marginal populations of the species in the mediterranean basin. twenty-two natural populations and one artificial population, located in four regions covering most of the natural range of p. halepensis in the country, were sampled. across this range, towards the south and west (and towards high altitudes) the populations ... | 2010 | 21039454 |
| evaluating post-fire forest resilience using gis and multi-criteria analysis: an example from cape sounion national park, greece. | forest fires are one of the major causes of ecological disturbance in the mediterranean climate ecosystems of the world. despite the fact that a lot of resources have been invested in fire prevention and suppression, the number of fires occurring in the mediterranean basin in the recent decades has continued to markedly increase. the understanding of the relationship between landscape and fire lies, among others, in the identification of the system's post-fire resilience. in our study, ecologica ... | 2011 | 21298266 |
| leaf +¦-¦ôü©o of remaining trees is affected by thinning intensity in a semiarid pine forest. | silvicultural thinning usually improves the water status of remaining trees in water-limited forests. we evaluated the usefulness of a dual stable isotope approach (+¦-¦-¦c, +¦-¦ôü©o) for comparing the physiological performance of remaining trees between forest stands subjected to two different thinning intensities (moderate versus heavy) in a 60-year-old pinus halepensis mill. plantation in semiarid southeastern spain. we measured bulk leaf +¦-¦-¦c and +¦-¦ôü©o, foliar elemental concentrations, ... | 2011 | 21388417 |
| ceratonia siliqua (carob) trees as natural habitat and source of infection by cryptococcus gattii in the mediterranean environment. | recent cryptococcus gattii infections in humans and animals, including several outbreaks in goats, were the basis of this environmental survey in six provinces of spain. a total of 479 samples from 20 tree species were studied. cryptococcus gattii was found for the first time in autochthonous mediterranean trees in spain. fourteen isolates of this pathogen were obtained from seven trees of three different species: 12 from carob (ceratonia siliqua), one from mediterranean stone pine (pinus halepe ... | 2011 | 21521012 |
| relationships between tree size, crown shape, gender segregation and sex allocation in pinus halepensis, a mediterranean pine tree. | background and aims sex allocation has been studied mainly in small herbaceous plants but much less in monoecious wind-pollinated trees. the aim of this study was to explore changes in gender segregation and sex allocation by pinus halepensis, a mediterranean lowland pine tree, within tree crowns and between trees differing in their size or crown shape. methods the production of new male and female cones and sex allocation of biomass, nitrogen and phosphorus were studied. the relationship betwee ... | 2011 | 21586528 |
| increase in water-use efficiency and underlying processes in pine forests across a precipitation gradient in the dry mediterranean region over the past 30 years. | motivated by persistent predictions of warming and drying in the entire mediterranean and other regions, we have examined the interactions of intrinsic water-use efficiency (w (i)) with environmental conditions in pinus halepensis. we used 30-year (1974-2003) tree-ring records of basal area increment (bai) and cellulose (13)c and (18)o composition, complemented by short-term physiological measurements, from three sites across a precipitation (p) gradient (280-700 mm) in israel. the results show ... | 2011 | 21590331 |
| to grow or to seed: ecotypic variation in reproductive allocation and cone production by young female aleppo pine (pinus halepensis, pinaceae). | age and size at the first reproduction and the reproductive allocation of plants are linked to different life history strategies. aleppo pine only reproduces through seed, and, as such, early female reproduction confers high fitness in its infertile highly fire-prone habitats along the mediterranean coast because life expectancy is short. we investigated the extent of ecotypic differentiation in female reproductive allocation and examined the relation between early female reproduction and vegeta ... | 2008 | 21632409 |
| identification of various laccases induced by anthracene and contribution to its degradation in a mediterranean coastal pine litter. | mediterranean coastal ecosystems are known to be highly subject to natural and anthropic environmental stress. in this study, we examine the effects of anthracene as a common pollutant on the total microbial communities from a pinus halepensis litter of a typical mediterranean coastal site (les calanques, marseille). the main objective was to identify the microbial factors leading the resilience of this ecosystem. two questions were addressed: (i) how lignin-degrading enzymes (laccase, lignin-pe ... | 2011 | 21663935 |
| genetic evidence for a janzen-connell recruitment pattern in reproductive offspring of pinus halepensis trees. | effective seed dispersal, combining both dispersal and postdispersal (establishment) processes, determines population dynamics and colonization ability in plants. according to the janzen-connell (jc) model, high mortality near the mother plant shifts the offspring establishment distribution farther away from the mother plant relative to the seed dispersal distribution. yet, extending this prediction to the distribution of mature (reproductive) offspring remains a challenge for long-living plants ... | 2011 | 21801257 |
| evaluation of antileishmanial, cytotoxic and antioxidant activities of essential oils extracted from plants issued from the leishmaniasis-endemic region of sned (tunisia). | in this study, we tested 10 essential oils (eos) extracted from 10 plants issued from sned region (tunisia) to evaluate both their leishmanicidal effects against leishmania major and l. infantum, and their cytotoxicity against murine macrophage cell line raw 264.7 (atcc, tib-71). the antioxidant activity was also monitored by the ddph method, while the chemical composition of active eo was assessed by gc-ms analysis. the results showed that the eos obtained from thymus hirtus sp. algeriensis (ri ... | 2011 | 21740286 |
| pine needles as passive bio-samplers to determine polybrominated diphenyl ethers. | eight polybrominated diphenyl ethers (pbdes) were determined in pine needles of three species (pinus halepensis, pinus pinea and pinus nigra) collected in the ne spain in an attempt to use this matrix for the biomonitoring of airborne pbdes. the method used was based in ultrasonic extraction followed by alumina and florisil clean-up and determination by gas chromatography coupled to mass spectrometry in negative chemical ionization. recoveries were between 99% and 138%, limits of detection betwe ... | 2011 | 21742367 |
| hydraulic adjustments underlying drought resistance of pinus halepensis. | drought-induced tree mortality has increased over the last decades in forests around the globe. our objective was to investigate under controlled conditions the hydraulic adjustments underlying the observed ability of pinus halepensis to survive seasonal drought under semi-arid conditions. one hundred 18-month saplings were exposed in the greenhouse to 10 different drought treatments, simulating combinations of intensities (fraction of water supply relative to control) and durations (period with ... | 2011 | 21712236 |
| the combined effects of pseudomonas fluorescens and tuber melanosporum on the quality of pinus halepensis seedlings. | the ecological, economic and social values of the ectomycorrhizal fungi of the black truffle found in the rural mediterranean are well known. the inoculation of pinus halepensis seedlings with mycorrhizal fungi and rhizobacteria can improve the morphology and physiology of the seedlings and benefit the regeneration of arid regions and the reintroduction of inocula of mycorrhizal fungi into these areas. some rhizobacteria can improve the establishment and functioning of ectomycorrhizal symbiosis. ... | 2011 | 22068563 |
| Instantaneous and historical temperature effects on alpha-pinene emissions in Pinus halepensis and Quercus ilex. | We compared the role of instantaneous temperature and temperature history in the determination of alpha-pinene emissions in Mediterranean conifer Pinus halepensis that stores monoterpenes in resin ducts, and in Mediterranean broad-leaved evergreen Quercus ilex that lacks such specialized storage structures. In both species, alpha-pinene emission rates (E) exhibited a significant exponential correlation with leaf temperature and the rates of photosynthetic electron transport (Jco2+o2) started to ... | 2011 | 21888223 |
| appraisal on the wound healing and anti-inflammatory activities of the essential oils obtained from the cones and needles of pinus species by in vivo and in vitro experimental models. | according to ethnobotanical data, pinus species have been used against rheumatic pain and for wound healing in turkish folk medicine. essential oils from the cones and needles of five different pinus species (pinus brutia ten., pinus halepensis mill., pinus nigra arn., pinus pinea l. and pinus sylvestris l.) were evaluated for their in vivo wound healing and anti-inflammatory activities. | 2011 | 22155393 |
| Effects of forest plantations on the genetic composition of conspecific native Aleppo pine populations. | Afforestation is a common and widespread management practice throughout the world, yet its implications for the genetic diversity of native populations are still poorly understood. We examined the effect of Aleppo pine (Pinus halepensis) plantations on the genetic composition of nearby conspecific native populations. We focused on two native populations in Israel with different levels of isolation from the surrounding plantations and compared the genetic diversity of naturally established young ... | 2011 | 22151559 |
| the full path of janzen-connell effects: genetic tracking of seeds to adult plant recruitment. | the janzen-connell (j-c) model (janzen 1970; connell 1971) has been a dominant yet controversial paradigm for forest community dynamics for four decades, especially in the tropics. with increasing distance from the parent plant, the density of dispersed seeds decreases and, because of a reduced impact of distance- and density-responsive seed and seedling enemies, propagule survival increases, resulting in peak recruitment at some distance from the parent and little recruitment near adult conspec ... | 2011 | 21951419 |
| Environmental distribution of PAHs in pine needles, soils, and sediments. | INTRODUCTION: The content of 16 polycyclic aromatic hydrocarbons (PAHs) was determined in 60 samples from three environmental matrices (soils, sediments, and pine needles) in an effort to assess their distribution on a river basin scale. METHODS: A sampling campaign was carried out in 2006, selecting urban, industrial, and agricultural sampling sites along the northeast of Spain. Techniques used included pressurized liquid extraction and solid-liquid ultrasonic extraction followed by gas chromat ... | 2011 | 21909968 |
| stand structure modulates the long-term vulnerability of pinus halepensis to climatic drought in a semiarid mediterranean ecosystem. | we investigated whether stand structure modulates the long-term physiological performance and growth of pinus halepensis mill. in a semiarid mediterranean ecosystem. tree radial growth and carbon and oxygen stable isotope composition of latewood (δ(13) c(lw) and δ(18) o(lw) , respectively) from 1967 to 2007 were measured in p. halepensis trees from two sharply contrasting stand types: open woodlands with widely scattered trees versus dense afforested stands. in both stand types, tree radial gro ... | 2011 | 22146000 |
| fatty acid profiles, antioxidant compounds and antiradical properties of pinus halepensis mill. cones and seeds. | background: pinus halepensis (aleppo pine) is a widespread tree that can be found in both natural and urban environments. a discrimination study based on the antioxidant compounds, antioxidant capacity and fatty acid (fa) profile of p. halepensis cones (phc) and seeds (phs) was performed. results: the total amount of phenols was about 72-fold higher in phc extract than in phs extract (p < 0.001). anthocyanin and carotenoid contents were 10- and 12-fold higher respectively in phc extract. phc and ... | 2012 | 22228540 |
| combination of fospeg-ipdt and a natural antioxidant compound prevents photosensitivity in a murine prostate cancer tumour model. | the aim of the present research was to investigate the potential use of a natural compound rich in antioxidant agents, derived from pinus halepensis (p. halepensis), to prevent pdt induced photosensitivity. the present research progressed in two levels. the first one evolved the optimization of fospeg-interstitial photodynamic therapy (ipdt) in a prostate cancer animal model. in the second one, p. halepensis bark extract, was evaluated for its potential use to prevent photosensitivity. | 2011 | 22594979 |
| nutritional quality of fresh and heated aleppo pine (pinus halepensis mill.) seed oil: trans-fatty acid isomers profiles and antioxidant properties. | numerous studies have focused on trans fatty acids (tfa) technologically produced by partial hydrogenation of oils. however, tfa can also be present in fresh oils. for this reason, cis fatty acid (cfa), tfa and conjugated linoleic acid (cla) of fresh and heated aleppo pine seed oil (apso) at frying temperature (180 °c) were evaluated and correlated with the antioxidant characteristics. results showed that fresh apso had a low oleic/linoleic ratio o/l (0.4). total tfa in fresh apso reached 1%. th ... | 2012 | 25114334 |