Tree physiology最新文献_第9页

Mechanistic insights into leaf senescence regulation in woody plants: a molecular perspective. 木本植物叶片衰老调控的机理透视：分子视角。

IF 3.5 2区农林科学

Tree physiology Pub Date : 2024-12-16 DOI: 10.1093/treephys/tpae150

Ruxue Zhang, Murao Zhang, Shuya Tan, Zhonghai Li

引用次数: 0

Changes in morphological and physiological traits of urban trees in response to elevated temperatures within an Urban Heat Island. 城市热岛温度升高对城市树木形态和生理特征的影响。

IF 3.5 2区农林科学

Tree physiology Pub Date : 2024-12-16 DOI: 10.1093/treephys/tpae145

Johanna Andrea Martínez-Villa, Alain Paquette, Kenneth J Feeley, Paula Andrea Morales-Morales, Christian Messier, Sandra M Durán

{"title":"Changes in morphological and physiological traits of urban trees in response to elevated temperatures within an Urban Heat Island.","authors":"Johanna Andrea Martínez-Villa, Alain Paquette, Kenneth J Feeley, Paula Andrea Morales-Morales, Christian Messier, Sandra M Durán","doi":"10.1093/treephys/tpae145","DOIUrl":"10.1093/treephys/tpae145","url":null,"abstract":"Urban heat islands (UHIs) are a common phenomenon in metropolitan areas worldwide where the air temperature is significantly higher in urban areas than in surrounding suburban, rural or natural areas. Mitigation strategies to counteract UHI effects include increasing tree cover and green spaces to reduce heat. The successful application of these approaches necessitates a deep understanding of the thermal tolerances in urban trees and their susceptibility to elevated urban temperatures. We evaluated how the photosynthetic thermal optimum (Topt), photosynthetic heat tolerance (T50) and key leaf thermoregulatory morphological traits (leaf area [LA], specific leaf area, leaf width, thickness and leaf dry matter content) differ between conspecific trees growing in 'hot' (UHI) vs 'cool' parts of Montreal, Canada (with a difference of 3.4 °C in air temperature), to assess the ability of seven common tree species to acclimation to higher temperatures. We hypothesized that individuals with hotter growing temperatures would exhibit higher Topt and T50, as well as leaf thermoregulatory morphological traits aligned with conservative strategies (e.g., reduced LA and increased leaf mass) compared with their counterparts in the cooler parts of the city. Contrary to our a priori hypotheses, LA increased with growing temperatures and only four of the seven species had higher T50 and only three had higher Topt values in the hotter area. These results suggest that many tree species cannot acclimate to elevated temperatures and that the important services they provide, such as carbon capture, can be negatively affected by high temperatures caused by climate change and/or the UHI effect. The ability vs inability of tree species to acclimate to high temperatures should be considered when implementing long term tree planting programs in urban areas.","PeriodicalId":23286,"journal":{"name":"Tree physiology","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11647596/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142628967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydraulic and structural traits of trees across light gradients in the Amazon secondary forest. 亚马逊次生林中不同光照梯度树木的水力和结构特征。

IF 3.5 2区农林科学

Tree physiology Pub Date : 2024-12-16 DOI: 10.1093/treephys/tpae146

Debora Coelho-Silva, Zilza T M Guimarães, Diego S Podadera, Guilherme S Modolo, Sergio Rossi, Marciel J Ferreira, Carmen R Marcati

{"title":"Hydraulic and structural traits of trees across light gradients in the Amazon secondary forest.","authors":"Debora Coelho-Silva, Zilza T M Guimarães, Diego S Podadera, Guilherme S Modolo, Sergio Rossi, Marciel J Ferreira, Carmen R Marcati","doi":"10.1093/treephys/tpae146","DOIUrl":"10.1093/treephys/tpae146","url":null,"abstract":"Amazonian species are generally unable to adapt to long drought periods, indicating a low capacity to adjust their hydraulic traits. Secondary forests account for 20% of forest cover in the Amazon, making natural regeneration species crucial under climate change scenarios. In this study, we compared the hydraulic traits of five species, including non-pioneers (Bertholletia excelsa Bonpl., Carapa guianensis Aubl., Hymenaea courbaril L.) and pioneers [Cedrela fissilis Vell., Tabebuia rosea (Bertol.) Bertero ex A.DC.], across light conditions (understory, intermediate, gap) in a 22-year-old secondary forest in Central Amazon, Brazil. Twenty-five saplings were planted and monitored in 3 plots × 5 blocks. Five years after the plantation, we assessed growth, wood density, leaf water potential at predawn and midday, xylem embolism resistance (P50), and hydraulic safety margins (HSM). The leaf water potential ranged from -2.9 to 0 MPa. The non-pioneer species C. guianensis and H. courbaril exhibited the lowest P50 (-4.06 MPa), indicating higher embolism resistance, whereas the pioneer T. rosea had the highest P50 (-1.25 MPa), indicating lower resistance. The HSM varied from -1.60 to 3.26 MPa, with lower values in gap conditions during the dry period (-1.60 MPa), especially affecting pioneer species. Wood density was influenced by both light and species type, with non-pioneers showing a generally higher density, with H. courbaril reaching 0.75 g cm-3 in the understory while the pioneer T. rosea showed the lowest density (0.27 g cm-3). These results highlight that light conditions affect hydraulic traits differently across species strategies, especially during early growth. Non-pioneer, slow-growing native species appear more resilient to light variation, making them suitable for future plantations aimed at climate adaptation in secondary forests.","PeriodicalId":23286,"journal":{"name":"Tree physiology","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142628969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Testing meaningful hypotheses in Tree Physiology. 检验树木生理学中有意义的假设。

IF 3.5 2区农林科学

Tree physiology Pub Date : 2024-12-16 DOI: 10.1093/treephys/tpae165

Maurizio Mencuccini

引用次数: 0

Do trees use stemflow water? A manipulative experiment on Singleleaf piñon and Utah juniper in Great Basin woodlands. 树木会利用茎流水吗？对大盆地林地中的单叶杉和犹他桧进行的操纵实验。

IF 3.5 2区农林科学

Tree physiology Pub Date : 2024-12-16 DOI: 10.1093/treephys/tpae143

Keirith A Snyder, Amira C Morrow, Tamzen K Stringham, Scott T Allen

{"title":"Do trees use stemflow water? A manipulative experiment on Singleleaf piñon and Utah juniper in Great Basin woodlands.","authors":"Keirith A Snyder, Amira C Morrow, Tamzen K Stringham, Scott T Allen","doi":"10.1093/treephys/tpae143","DOIUrl":"10.1093/treephys/tpae143","url":null,"abstract":"It has been postulated that stemflow, precipitation that flows from plant crowns down along branches and stems to soils, benefits plants that generate it because it increases plant-available soil water near the base of the plant; however, little direct evidence supports this postulation. Were plants' crowns to preferentially route water to their roots, woody plants with large canopies could benefit. For example, piñon and juniper tree encroachment into sagebrush steppe ecosystems could be facilitated by intercepted precipitation routed to tree roots as stemflow, hypothetically reducing water available for shrubs and grasses. We tested whether Great Basin piñon and juniper trees use and benefit from stemflow. In a drier-than-average and wetter-than-average water year, isotopically labeled water was applied to tree stems to simulate stemflow. Both species took up stemflow, with label signals peaking and receding over 2-4 days. Despite this uptake, no alleviation of water stress was detected in the drier year. The stemflow uptake resulted in some water stress alleviation in the wetter year, specifically for piñons, which took up water from deeper in the soil profile than did junipers. Mixing model analyses suggested that stemflow was a small fraction of the water in stems (⁓0-2%), but an order-of-magnitude larger fraction of the stemflow was transpired in those few days after addition. These findings represent a novel demonstration of the rapid uptake and use of stemflow that infiltrates the rhizosphere, but they also prompt questions about the remaining stemflow's fate and why alleviation of water stress was so minor.","PeriodicalId":23286,"journal":{"name":"Tree physiology","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142839478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrated analysis of miRNA-mRNA regulatory networks in Anoectochilus roxburghii in response to blue laser light. 蓝激光照射下野樱草miRNA-mRNA调控网络的综合分析

IF 3.5 2区农林科学

Tree physiology Pub Date : 2024-12-16 DOI: 10.1093/treephys/tpae144

Hansheng Li, Chunzhen Cheng, Mulan Chen, Yuqing Li, Jinkun Li, Wei Ye, Gang Sun

{"title":"Integrated analysis of miRNA-mRNA regulatory networks in Anoectochilus roxburghii in response to blue laser light.","authors":"Hansheng Li, Chunzhen Cheng, Mulan Chen, Yuqing Li, Jinkun Li, Wei Ye, Gang Sun","doi":"10.1093/treephys/tpae144","DOIUrl":"10.1093/treephys/tpae144","url":null,"abstract":"Anoectochilus roxburghii (Wall.) Lind. has significant medicinal and economic value, and the social demand for this species is increasing annually. Laser light sources have different luminescent mechanisms compared with ordinary light sources and are also important factors regulating the synthesis of functional metabolites in A. roxburghii. However, the regulatory mechanism through which A. roxburghii responds to blue laser light has not been investigated. Previous studies have shown that blue-laser treatment results in more red leaves than blue- or white-light treatment. Here, the differences in the effects of laser treatment on A. roxburghii were analyzed by transcriptome sequencing. Gene Ontology analysis revealed that the membranes, calcium ion binding, brassinosteroid-mediated signaling pathway and response to salicylic acid play important roles in the response of A. roxburghii to blue laser light. Kyoto Encyclopedia of Genes and Genomes analysis revealed the involvement of multiple pathways in the response to blue-laser treatment, and among these, beta biosynthesis, flavone and flavonol biosynthesis, thiamine metabolism, limonene and pinene biosynthesis, and peroxisomes play core roles. Cytoscape interaction analysis of the differentially expressed miRNA targets indicated that novel_miR_66, novel_miR_78 and novel_miR_212 were most likely involved in the effect of blue laser light on A. roxburghii. Metabolic content measurements showed that blue laser light increased the beet red pigment, thiamine, total flavonoid and limonene contents, and qPCR analysis confirmed that novel_miR_21, novel_miR_66, novel_miR_188 and novel_miR_194 might participate in the blue-laser signaling network through their target genes and thereby regulate the functional metabolite accumulation in A. roxburghii. This study provides a scientific basis for high-yield A. roxburghii production.","PeriodicalId":23286,"journal":{"name":"Tree physiology","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142839396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CsCBF2 contributes to cold repression of chlorophyll and carotenoid biosynthesis in albino Camellia sinensis cv. Baiye 1. CsCBF2有助于抑制白化山茶白叶1号叶绿素和类胡萝卜素的生物合成。

IF 3.5 2区农林科学

Tree physiology Pub Date : 2024-12-16 DOI: 10.1093/treephys/tpae149

Xin Cheng, Ying Sun, Yijia Wang, Xuyang Liu, Jingjie Cao, Dandan Li, Dan Yang, Chao Zhuo, Xiaochun Wan, Linlin Liu

{"title":"CsCBF2 contributes to cold repression of chlorophyll and carotenoid biosynthesis in albino Camellia sinensis cv. Baiye 1.","authors":"Xin Cheng, Ying Sun, Yijia Wang, Xuyang Liu, Jingjie Cao, Dandan Li, Dan Yang, Chao Zhuo, Xiaochun Wan, Linlin Liu","doi":"10.1093/treephys/tpae149","DOIUrl":"10.1093/treephys/tpae149","url":null,"abstract":"C-repeat binding factors (CsCBFs) play a pivotal role in regulating cold response in higher plants. Camellia sinensis cv. Baiye 1, a representative albino tea cultivar, has been identified as temperature-sensitive based on long-term observations by tea farmers. However, it remains unclear whether CsCBFs are involved in temperature-mediated albinism and seasonal greening in 'Baiye 1', and the mechanisms by which CBFs regulate cold responses in albino leaves are unknown. In this study, we demonstrate that CsCBF2 suppresses the seasonal greening of albino leaves by inhibiting chlorophyll and carotenoid biosynthesis under cold stress. In tea plantations, the accumulation of chlorophylls and carotenoids in the albino shoots of 'Baiye 1' is closely correlated with the effective accumulated temperature during its seasonal greening process. Weighted Gene Co-expression Network Analysis revealed negative associations between CsCBF expression and chlorophylls, carotenoids, as well as their biosynthetic genes REVEILLE 1 (CsRVE1) and Zeaxanthin epoxidase 1 (CsZEP1) under temperature fluctuations during seasonal greening. Cold-induced upregulation of CsCBF2 expression and decreased chlorophyll and carotenoids under controlled climate conditions. Transient suppression of CsCBF2 by antisense oligodeoxynucleotides elevated expressions of target genes and increased chlorophylls and carotenoids. CBF-binding cis-elements were identified in CsRVE1, Protochlorophyllide oxidoreductase A (CsPORA) and CsZEP1 promoters. Luciferase assays suggested CsCBF2 binding to the CRT/DRE cis-elements and repressing expression of CsRVE1, CsPORA and CsZEP1. These findings highlight CsCBF2 as a key transcriptional repressor involved in the seasonal greening of albino 'Baiye 1' under cold stress by modulating cold responses and inhibiting genes associated with chlorophyll and carotenoid biosynthesis.","PeriodicalId":23286,"journal":{"name":"Tree physiology","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142682768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bark water vapor conductance varies among temperate forest tree species and is affected by flooding and stem bending. 不同温带森林树种树皮水蒸气传导性不同，受洪水和树干弯曲的影响。

IF 3.5 2区农林科学

Tree physiology Pub Date : 2024-12-10 DOI: 10.1093/treephys/tpae156

Yinuo Zhou, Grace Rosseau, Viet Dao, Brett T Wolfe

{"title":"Bark water vapor conductance varies among temperate forest tree species and is affected by flooding and stem bending.","authors":"Yinuo Zhou, Grace Rosseau, Viet Dao, Brett T Wolfe","doi":"10.1093/treephys/tpae156","DOIUrl":"https://doi.org/10.1093/treephys/tpae156","url":null,"abstract":"Bark water vapor conductance (gbark) modulates forest transpiration during droughts, when leaf transpiration is highly reduced. If disturbances such as windstorms and floods impact gbark, they could affect tree performance during subsequent droughts. Bark traits, particularly lenticel traits, likely drive variation in gbark and may influence the effects of disturbances on gbark. We assessed variation in gbark and bark traits in tree branches of 15 tree species in a temperate forest in Louisiana, USA, and performed experiments to test whether gbark in tree branches was affected by bending (simulating wind) and whether gbark of tree saplings was affected by soil flooding. Among tree species, mean branch gbark ranged from 2.22 to 12.02 mmol m-2 s-1. Stem bending increased gbark by 23% compared to unbent controls. Although gbark was unaffected by 38 days of flooding, after 69 days post-flood it was reduced by 41% compared to unflooded controls. The relationships between gbark and bark traits, including bark thickness, lenticel density, and lenticel size, were inconsistent across the survey and experiments. Together, these results show that gbark is variable among species and mutable. Uncovering the drivers of gbark variation within and among trees, including exposure to extreme weather events, will inform projections of forest dynamics under climate change.","PeriodicalId":23286,"journal":{"name":"Tree physiology","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142808049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Initial stomatal conductance increases photosynthetic induction of trees leaves more from sunlit than from shaded environments: a meta-analysis. 初始气孔导度对树叶光合作用诱导的增加作用，来自阳光环境的大于来自阴影环境的：荟萃分析

IF 3.5 2区农林科学

Tree physiology Pub Date : 2024-11-05 DOI: 10.1093/treephys/tpae128

Huixing Kang, Yuan Yu, Xinran Ke, Hajime Tomimatsu, Dongliang Xiong, Louis Santiago, Qingmin Han, Reki Kardiman, Yanhong Tang

{"title":"Initial stomatal conductance increases photosynthetic induction of trees leaves more from sunlit than from shaded environments: a meta-analysis.","authors":"Huixing Kang, Yuan Yu, Xinran Ke, Hajime Tomimatsu, Dongliang Xiong, Louis Santiago, Qingmin Han, Reki Kardiman, Yanhong Tang","doi":"10.1093/treephys/tpae128","DOIUrl":"10.1093/treephys/tpae128","url":null,"abstract":"It has long been held that tree species/leaves from shaded environments show faster rate of photosynthetic induction than species/leaves from sunlit environments, but the evidence so far is conflicting and the underlying mechanisms are still under debate. To address the debate, we compiled a dataset for 87 tree species and compared the initial increasing slope during the first 2-min induction (SA) and stomatal and biochemical characteristics between sun and shade species from the same study, and those between sun and shade leaves within the same species. In 77% of between-species comparisons, the species with high steady-state photosynthetic rate in the high light (Af) exhibited a larger SA than the species with low Af. In 67% within-species comparisons, the sun leaves exhibited a larger SA than the shade leaves. However, in only a few instances did the sun species/leaves more rapidly achieve 50% of full induction, with an even smaller SA, than the shade species/leaves. At both the species and leaf level, SA increased with increasing initial stomatal conductance before induction (gsi). Despite exhibiting reduced intrinsic water-use efficiency in low light, a large SA proportionally enhances photosynthetic carbon gain during the first 2-min induction in the sun species and leaves. Thus, in terms of the increase in absolute rate of photosynthesis, tree species/leaves from sunlit environments display faster photosynthetic induction responses than those from shaded environments. Our results call for re-consideration of contrasting photosynthetic strategies in photosynthetic adaption/acclimation to dynamic light environments across species.","PeriodicalId":23286,"journal":{"name":"Tree physiology","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142372959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Isotopic steady state or non-steady state transpiration? Insights from whole-tree chambers. 同位素稳态或非稳态蒸腾作用？来自整棵树腔室的启示

IF 3.5 2区农林科学

Tree physiology Pub Date : 2024-11-05 DOI: 10.1093/treephys/tpae125

Richard Harwood, Lucas A Cernusak, John E Drake, Craig V M Barton, Mark G Tjoelker, Margaret M Barbour

引用次数: 0