Trees最新文献

{"title":"Structural and compositional acclimation of forests to extended drought: results of the KROOF throughfall exclusion experiment in Norway spruce and European beech","authors":"Hans Pretzsch,&nbsp;Shamim Ahmed,&nbsp;Thomas Rötzer,&nbsp;Gerhard Schmied,&nbsp;Torben Hilmers","doi":"10.1007/s00468-023-02435-z","DOIUrl":"10.1007/s00468-023-02435-z","url":null,"abstract":"<div><p>Drought effects on tree growth and mortality are widely studied, but scant knowledge exists on its impact on stand density, size variation, or mixing proportions. Grasping drought's influence on structural and compositional diversity is crucial for stand dynamics, ecosystem services, and silvicultural adaptation. We relied on KROOF, a 5-year throughfall exclusion experiment in a mature Norway spruce (<i>Picea abies</i>) and European beech (<i>Fagus sylvatica</i>) stand, to analyze its impact on structural and compositional attributes, including Stand Density Index (SDI), Growth Dominance Coefficient (GDC), and species mixing proportion. Our study demonstrates that drought-induced growth reduction and tree loss decreased SDI by 27%, mixing proportion by 41% at Norway spruce’s expense, and homogenized stand structure. Furthermore, we reveal that stand density, mixing proportion, and structural diversity were more affected in Norway spruce, stabilizing growth at the stand level. Extended drought significantly altered growth partitioning in favor of smaller trees, with a 70% reduction in growth-size relationship slope and a 157% decrease in GDC. Species-level analysis indicated a stronger partitioning shift towards smaller trees, particularly in Norway spruce. We discuss that longer drought periods may trigger acclimation at tree and stand levels, potentially underestimated when based solely on individual drought years. Sustained stress could induce acclimation across various levels, from the stand to the species cohort, tree, and organ. Maintaining structural and compositional diversity may mitigate future drought stress effects on growth, mortality, and stand structure, as exemplified by the extended experimental drought. We suggest silvicultural approaches better attuned to natural processes amid climate change.</p></div>","PeriodicalId":805,"journal":{"name":"Trees","volume":"37 5","pages":"1443 - 1463"},"PeriodicalIF":2.3,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00468-023-02435-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"6551616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Vigor and viability during seed storage of three Campomanesia species endemic to southern Brazil","authors":"Rosa Angelica Elias,&nbsp;Daniela Goeten,&nbsp;Maycon Morais da Silva,&nbsp;Amanda Santos,&nbsp;Neusa Steiner","doi":"10.1007/s00468-023-02433-1","DOIUrl":"10.1007/s00468-023-02433-1","url":null,"abstract":"<div><h3>Key message</h3><p><i>Campomanesia</i> spp produce seeds with high viability and vigor which\u0000are tolerant to desiccation but not to cold temperature.</p><h3>Abstract</h3><p>The genus <i>Campomanesia</i> has ecological and economic importance in the Atlantic Forest, but 19 of its species are on the red list of threatened species of the International Union for Conservation of Nature (IUCN). There is a lack of studies on seed biology and considerable urgency in developing strategies for their ex-situ conservation and subsequent use in restoration. In this study, we analyzed the viability and vigor in seeds of three <i>Campomanesia</i> species under different temperatures to determine the ideal conditions for storage. Additionally, we analyzed the factors that influence their response in storage. Differences in germination, tetrazolium and germination speed index were compared for three <i>Campomanesia</i> species with different distributions in the Brazilian Atlantic Forest (<i>C. xanthocarpa</i>, <i>C. reitziana</i> and <i>C. littoralis</i>). Seeds of three species were stored in two water contents, three temperatures, for six period and liquid nitrogen. The three species presented seeds sensitive to freezing (−20 °C and liquid nitrogen). <i>C. xanthocarpa</i> seeds showed a short life during storage at 25 °C and 8 °C. <i>C. reitziana</i> and <i>C. littoralis</i> seeds with initial water content showed high germination up to 120 days of storage at 8 °C and these values were higher than seeds with water content of 0.16 g H₂O. g dw^− 1 stored under the same conditions. Finally, our results of the characterization of the tolerance to drying and the behavior during storage at different temperatures of <i>C. xanthocarpa</i>, <i>C. littoralis</i> and <i>C. reitziana</i> are the base line for the generation of successful conservation strategies, both in situ and ex situ.</p></div>","PeriodicalId":805,"journal":{"name":"Trees","volume":"37 5","pages":"1417 - 1433"},"PeriodicalIF":2.3,"publicationDate":"2023-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"6551715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geographic differentiation of Abies alba, A. x borisii-regis, and A. cephalonica populations at the Balkan Peninsula based on needle morpho-anatomy","authors":"Zorica S. Mitić,&nbsp;Jelena S. Nikolić,&nbsp;Marina Z. Jušković,&nbsp;Vladimir N. Ranđelović,&nbsp;Biljana M. Nikolić,&nbsp;Bojan K. Zlatković","doi":"10.1007/s00468-023-02436-y","DOIUrl":"10.1007/s00468-023-02436-y","url":null,"abstract":"<div><h3>Key message</h3><p>This study identified 10 fir populations that may be hybridogenous. The immediate activities on conservation of these polymorphic fir populations should be supported as hybrids may be ecologically and economically superior to the parent species.</p><h3>Abstract</h3><p>This is the first report on morpho-anatomical differentiation of both lower-rank and upper-rank needles in <i>Abies alba</i>, <i>A.</i> x <i>borisii-regis,</i> and <i>A. cephalonica</i>, using 18 native populations from almost the entire assumed hybrid zone in the Balkan Peninsula. The 35 morpho-anatomical characteristics were analyzed biometrically, and 18 with the application of multivariate statistical analysis. Clinal pattern in distribution of morpho-anatomical variation over the broader transition zone between the putative parent species was observed. Furthermore, the results of the biometric analyses justify the validity of this method for differentiating between the eastern <i>A. alba</i> lineage and <i>A. cephalonica</i>, for both needle types. Thus, the results of this study show clear differences between <i>A. alba</i> and <i>A. cephalonica</i>, but unstable characteristics of <i>A.</i> x <i>borisii-regis</i>. This finding supports the hypothesis that <i>A.</i> x <i>borisii-regis</i> is an unstabilized taxon produced by recent hybridization and introgression between <i>A. alba</i> and <i>A. cephalonica</i>. Based on the multivariate statistical analysis, 10 of the studied fir populations may be hybridogenous within a wider geographical area (southwestern and southern Bulgaria, southernmost North Macedonia and almost the entire Greece). The obtained results did not indicate a hybrid status for two fir populations from Peloponnese and one from the Cephalonia Island (pure <i>A. cephalonica</i> populations), which partly agrees with the recent molecular data.</p></div>","PeriodicalId":805,"journal":{"name":"Trees","volume":"37 5","pages":"1465 - 1481"},"PeriodicalIF":2.3,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"6551685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Intraspecific identification of some pomegranate (Punica granatum L.) genotypes based on DNA barcoding and morpho-biochemical characteristics","authors":"Behrouz Moradi Ashour,&nbsp;Mohammad Rabiei,&nbsp;Behrouz Shiran","doi":"10.1007/s00468-023-02434-0","DOIUrl":"10.1007/s00468-023-02434-0","url":null,"abstract":"<p>Accurate identification of genotypes and their relationships is one of the major challenges in the study of plant taxonomy, especially at the subspecies level. For this purpose, molecular, biochemical, and morphological markers are commonly used in different plant species. In the present study, the sequences of three DNA barcode regions, including the ITS, <i>trn</i>l<i>-</i>F, and <i>mat</i>K regions, and all their possible combinations were examined in 21 pomegranate (<i>Punica granatum</i> L.) accessions. In addition, 18 morphological and biochemical characteristics of the genotypes were measured simultaneously to confirm the distinctions. The results show that the combination of three barcode regions (ITS + <i>trn</i>l<i>-</i>F + <i>mat</i>K) has the highest efficiency due to the highest number of variable sites as well as parsimony informative sites. Considering the phylogenetic trees obtained from the barcode regions and the morpho-biochemical traits, it can be seen that genotype 808 is clearly different from the other genotypes. Of the genotypes studied in this experiment, ten genotypes were classified into close groups based on their geographic origin in both the barcode and morpho-biochemical clusters. However, genotypes 709, 712, and 708, which were grown in different geographical areas, had similar characteristics, so they were grouped in close branches in both dendrograms. This suggests that the simultaneous use of molecular and morphological markers is essential for distinguishing pomegranate genotypes.</p>","PeriodicalId":805,"journal":{"name":"Trees","volume":"37 5","pages":"1435 - 1442"},"PeriodicalIF":2.3,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"6551679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Little vertical and circumferential variations in stem xylem water δ2H and δ18O in three tree species","authors":"Seth E. Younger,&nbsp;L. G. Monda,&nbsp;C. R. Jackson,&nbsp;J. Blake,&nbsp;D. P. Aubrey","doi":"10.1007/s00468-023-02431-3","DOIUrl":"10.1007/s00468-023-02431-3","url":null,"abstract":"<div>\u0000 \u0000 <span>AbstractSection</span>\u0000 Key message\u0000 <p>Little vertical or circumferential variation in within-tree xylem water δ²H and δ¹⁸O within three tree species.</p>\u0000 \u0000 <span>AbstractSection</span>\u0000 Abstract\u0000 <p>Vertical and circumferential patterns of xylem water isotope signatures in large trees are rarely characterized but may influence interpretation of water source investigations and soil/xylem water isotope offsets. To examine vertical and circumferential variation in xylem water δ²H and δ¹⁸O, we collected xylem tissue at 5 heights (0, 1, 4, 7 and 10 m) from three replicate trees of three species with contrasting xylem anatomy, two angiosperms (<i>Liquidambar styraciflua</i> and <i>Quercus nigra</i>) and one gymnosperm (<i>Pinus taeda</i>). Concurrently, we also determined δ²H and δ¹⁸O of groundwater, soil water, and recent precipitation. On a different day, we collected circumferential samples at 1 m from the same trees to test for sectorality effects. Water from stem and soil samples were cryogenically extracted and analyzed for δ²H and δ¹⁸O. Mean xylem water δ²H and δ¹⁸O were significantly different between species, both vertically and circumferentially. We did not find significant (<i>p</i> = 0.05) systematic variation in δ²H or δ¹⁸O with height. We found no significant evidence for sectorality effects on δ²H, δ¹⁸O. Variances of vertical synoptic xylem water δ²H or δ¹⁸O were similar between species, 7.2–10.4‰ for δ²H and 0.58–0.81‰ for δ¹⁸O. Circumferential variances were also similar between species, 4.0–6.0 for δ²H and 0.37–0.44 for δ¹⁸O. A mixing model showed that sweetgum, water oak and loblolly pine, were drawing most of their water from deep soil from 45 to 190 cm (84.7, 68.4 and 53.2%, respectively) however, soil water-excess values indicate δ²H fractionation effects on these estimates. Dual isotope mixing model evaluation with single and multiple sample configurations showed that source water estimates were not affected by within tree variability of xylem water signatures. Xylem water δ²H and δ¹⁸O variability with height or circumference, was 3.2 and 2.7 times less than between tree variation because of transient temporal and spatial processes and is, therefore, not likely to affect interpretations of water sourcing in these three species.</p>\u0000 \u0000 </div>","PeriodicalId":805,"journal":{"name":"Trees","volume":"37 5","pages":"1401 - 1415"},"PeriodicalIF":2.3,"publicationDate":"2023-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"6551509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Specific leaf area (SLA) serves as a proxy to predict total carbon content in understory individuals of the neotropical canopy palm Socratea exorrhiza","authors":"Gerardo Avalos","doi":"10.1007/s00468-023-02430-4","DOIUrl":"10.1007/s00468-023-02430-4","url":null,"abstract":"<div>\u0000 \u0000 <span>AbstractSection</span>\u0000 Key message\u0000 <p>Specific leaf area (SLA, cm²g^− 1) is a fundamental leaf economics spectrum trait, which predicted the total carbon sequestered at the individual level in understory palms of Socratea exorrhiza.</p>\u0000 \u0000 <span>AbstractSection</span>\u0000 Abstract\u0000 <p>Evaluating intraspecific and ontogenetic variation in SLA is critical to understand how functional traits influence plant fitness and regeneration strategies. SLA is usually expressed as an average value per species. Its variation across ontogenetic stages and environmental gradients is poorly known, particularly in palms. I measured SLA in 112 palms of <i>Socratea exorrhiza</i> in the understory of a tropical rainforest in Costa Rica. Total carbon content sequestered per palm (kg) was estimated from an allometric equation. I determined the regression between Ln SLA and Ln carbon content, and then used principal components to summarize the regeneration strategy of <i>S. exorrhiza</i> by examining the allometry of stem length and diameter, number of fronds, number of stilt roots, stilt root cone height, slenderness ratio, SLA, and carbon content. SLA predicted total sequestered carbon (slope = − 4.33, <i>r</i>² = 0. 52). Smaller values of SLA were associated with increased carbon content and larger palms. Two components explained 77% of the variation in functional traits. The first (76%) was dominated by stem diameter, height, stilt root cone, and carbon content (negatively associated with SLA) and reflected palm size; the second (15%) was dominated by slenderness ratio and number of leaves and reflected allocation to growth in height. The inverse relationship between SLA and sequestered carbon is consistent with the initial shade tolerant, conservative resource use strategy of <i>S. exorrhiza</i>.</p>\u0000 \u0000 </div>","PeriodicalId":805,"journal":{"name":"Trees","volume":"37 6","pages":"1831 - 1840"},"PeriodicalIF":2.3,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41725248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Healing of bark wounds in Norway spruce seedlings can be negatively affected by treatment with methyl jasmonate","authors":"Yayuan Chen,&nbsp;Christer Björkman,&nbsp;Helena Bylund,&nbsp;Niklas Björklund,&nbsp;Karl-Anders Högberg,&nbsp;Adriana Puentes","doi":"10.1007/s00468-023-02428-y","DOIUrl":"10.1007/s00468-023-02428-y","url":null,"abstract":"<div><h3>Key message</h3><p>Treatment with methyl jasmonate can slow down the healing of stem bark wounds in Norway spruce seedlings.</p><h3>Abstract</h3><p>In woody plants, healing of bark wounds is a tolerance trait involved in recovery from stem damage. Yet, little is known on how wound healing may be affected by plant protection treatments such as methyl jasmonate application (MeJA, a plant hormone triggering increased resistance to pests). Here, we examined if MeJA can affect healing of an existing and a subsequently inflicted stem wound on Norway spruce (<i>Picea abies</i>) seedlings, the effect of treatment on plant growth, and potential trade-offs between healing and resistance to insect damage. Seedlings from 18 full-sib families were mechanically wounded (or not) on the lower stem and treated with MeJA (or water) one week after. Two months later, another wound was inflicted and wound area was measured during six months. Growth of non-wounded and wounded seedlings were compared, and correlations between family estimates of healing rates and field insect damage were examined. We found that MeJA slowed down wound healing. For the first and second wound, respectively, MeJA-treated seedlings experienced 15% and 9% slower healing rates, and wounds remained 58% and 69% larger in size compared to water-treated seedlings. Stem wounding and MeJA together were more detrimental to seedling diameter than height growth, relative to each treatment alone. Finally, resistance to field insect damage and wound healing rates were not significantly correlated. We conclude that MeJA-mediated seedling protection may trade-off with bark wound healing, which may be negative for seedling vigor. However, further studies are needed to evaluate if such effects outweigh the benefits that MeJA provides.</p></div>","PeriodicalId":805,"journal":{"name":"Trees","volume":"37 5","pages":"1369 - 1384"},"PeriodicalIF":2.3,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00468-023-02428-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"6551497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Non-structural carbohydrate concentrations in contrasting dry and wet years in early- and late-successional boreal forest trees","authors":"Choimaa Dulamsuren,&nbsp;Gurbazar Byamba-Yondon,&nbsp;Shagjjav Oyungerel,&nbsp;Renate Nitschke,&nbsp;Tobias Gebauer","doi":"10.1007/s00468-023-02420-6","DOIUrl":"10.1007/s00468-023-02420-6","url":null,"abstract":"<div><h3>Key message</h3><p>Patterns of non-structural carbohydrate allocation in dry and wet differ between birch and larch in southern boreal forest.</p><h3>Abstract</h3><p>An increasing area of boreal forests is currently switching from temperature to drought limitation. It is not sufficiently known how the trees’ non-structural carbohydrate (NSC) pools are affected by alternating dry and wet phases in drought-prone boreal forests and how NSC concentrations are related to growth responses. In the southern boreal forests of Mongolia, NSC concentrations (including soluble sugars and starch) were determined enzymatically in the stemwood of two tree species during a drought year (2017) that was preceded by another drought in 2015 and two subsequent wet years (2018/19). <i>Betula platyphylla</i> as a broadleaved pioneer tree showed reduced radial stem increment in the drought year and rapidly increasing growth in the following wet years. It had low concentrations of NSC and of soluble sugars in particular, suggesting that most assimilate were invested into growth in this early successional tree. <i>Larix sibirica</i> as a late-successional conifer also showed reduced growth in the drought year, but lagged reductions in NSC concentrations and less pronounced growth releases than birch in 2018/19, suggesting a longer aftereffect of the drought than in birch. Larch maintained much higher NSC concentrations throughout the three studied growing seasons, including the drought episode in 2017. The NSC pool in larch was primarily formed by soluble sugars in sapwood and heartwood. In contrast to birch, larch showed a high allocation priority for assimilates in soluble sugars before investment in biomass, which explains the aftereffect of the drought on both growth and NSC. We conclude that the high soluble sugar concentrations in larch are a key determinant of the extreme drought and cold tolerance of <i>L. sibirica</i> and, therefore, growth has lower allocation priority for carbon compared to birch.</p></div>","PeriodicalId":805,"journal":{"name":"Trees","volume":"37 5","pages":"1315 - 1332"},"PeriodicalIF":2.3,"publicationDate":"2023-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00468-023-02420-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"6551741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Different rootstocks can change the photosynthetic performance of the ‘Uba’ mango scion after recurrent drought events","authors":"Leonardo Faria-Silva,&nbsp;Diolina Moura Silva","doi":"10.1007/s00468-023-02429-x","DOIUrl":"10.1007/s00468-023-02429-x","url":null,"abstract":"<div><h3>Key message</h3><p>PI_TOTAL, PI_ABS, DI₀/RC, and δ<i>R</i>₀ are good markers of water stress in mango trees, demonstrating that consecutive drought cycles can develop differential acclimatization, depending on the rootstock used.</p><h3>Abstract</h3><p>Drought stress is one of the premier limitations to global agricultural production due to the complexity of the water-limiting environment and changing climate. In addition to indicating plant drought stress, photosynthetic performance is also determined by the scion/rootstock combination. The chlorophyll <i>a</i> fluorescence analysis is a reliable method to identify the most promising rootstock in the production of ‘Uba’ mango seedlings. We tested the hypothesis that different rootstocks can change the physiological responses related to chlorophyll <i>a</i> fluorescence, gas exchange, and proline content of different combinations of mango scion/rootstocks after three consecutive drought cycles, identifying the most vigorous rootstock with the ability to generate ‘Uba’ mango trees with greater differential resistance to drought. The Oleo rootstock (UC2/Oleo combination) has the greatest ability to imprint differential drought resistance in ‘Uba’ mango scions, generating plants with more vigor and better resistance to water deficit. The results suggest that the plant’s consecutive cycles of drought have been “learned” as a resistance mechanism to cope with severe water shortages in the future.</p></div>","PeriodicalId":805,"journal":{"name":"Trees","volume":"37 5","pages":"1385 - 1399"},"PeriodicalIF":2.3,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"6551575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Relevance of organic vs. inorganic nitrogen in intra- and interspecific competition of seven central European tree species","authors":"Judy Simon","doi":"10.1007/s00468-023-02418-0","DOIUrl":"10.1007/s00468-023-02418-0","url":null,"abstract":"<div><h3>Key message</h3><p>\u0000 <b>When competing for nitrogen with other tree species, organic N is more important than inorganic N for most species</b>\u0000 </p><h3>Abstract</h3><p>Competition for nitrogen (N) in the rhizosphere is a key process regulating a seedling´s chances for growth and survival. However, only few studies have investigated this at the individual species´ level when using a community approach. In this study, ¹⁵N incubation experiments were conducted to quantify inorganic (i.e. ammonium and nitrate) and organic (i.e. glutamine-N and arginine-N) net N-uptake capacity of seven temperate woody species co-occurring on calcareous substrate and to investigate the consequences of intra- vs. interspecific competition in a woody seedling community. The results showed that short-term net inorganic and organic N uptake capacity was unrelated to a seedling´s fast or slow growth. Furthermore, competition with other tree species did not change a seedlings´ overall capacity to take up inorganic and organic N sources. Organic N was preferred over inorganic N for most species and the preferences for specific N source shifted with competition regime and tree species. Overall, this study indicates the importance of organic N sources for N uptake in woody seedlings.</p></div>","PeriodicalId":805,"journal":{"name":"Trees","volume":"37 5","pages":"1583 - 1591"},"PeriodicalIF":2.3,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00468-023-02418-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"6551690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}