Trees最新文献 - Book学术

Radial water transfer from sapwood to inner bark during day time: evidence from diurnal variations in water isotope composition and isotope tracing 白天从边材向树皮内部的径向水转移：来自水同位素组成和同位素示踪的日变化证据

IF 2.1 3区农林科学

Trees Pub Date : 2025-05-22 DOI: 10.1007/s00468-025-02630-0

Daniel Epron, Yan Xia, Reno Yoshida, Masanori Katsuyama, Wakana A. Azuma, Yoshiko Kosugi, Satoshi Nagai, Masako Dannoura

{"title":"Radial water transfer from sapwood to inner bark during day time: evidence from diurnal variations in water isotope composition and isotope tracing","authors":"Daniel Epron, Yan Xia, Reno Yoshida, Masanori Katsuyama, Wakana A. Azuma, Yoshiko Kosugi, Satoshi Nagai, Masako Dannoura","doi":"10.1007/s00468-025-02630-0","DOIUrl":"10.1007/s00468-025-02630-0","url":null,"abstract":"<div><h3>Key message</h3><p>Osmotically-driven radial transfer of water from xylem to phloem occurs during the day in the branches of hinoki cypress, even though branch diameter shrinks.</p><h3>Abstract</h3><p>The hydraulic coupling between xylem and phloem has been explicitly included in theoretical models of phloem transport; however, the predicted radial water transfer from xylem to phloem during the day has not yet been demonstrated experimentally. In a first experiment, we tested the hypothesis of a water transfer from xylem to the inner bark during the day, assuming that, if the transfer does not occur, phloem water would be isotopically enriched due to an influx of enriched water concomitant with sugar loading in the foliage. The inner bark water from branches of mature hinoki cypress was, however, only slightly enriched in <sup>18</sup>O in the afternoon compared to sapwood water (δ<sup>18</sup>O of − 6.3 and − 6.6‰ respectively), but much less than foliage water (16.0‰ at noon and 18.9‰ in the afternoon). This suggests that the isotopically enriched leaf water concurrently loaded with sugars in the leaf phloem was mixed with the unenriched xylem water. In a second experiment, to confirm that water transfer from xylem to the inner bark during the day occurs in branches, deuterium-enriched water was sprinkled on the soil. Concomitant deuterium enrichment of xylem and inner bark water extracted from branches was observed during the day after labelling, earlier than in leaves, when branches were still shrinking. This provides experimental support for theoretical models of phloem transport that have predicted radial transfer of water from xylem to phloem along the path.</p></div>","PeriodicalId":805,"journal":{"name":"Trees","volume":"39 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117555","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}

引用次数: 0

Effects of stand structure and soil nutrient status on tree growth and forest production: evidence from a forest management experiment in a mixed oak forest 林分结构和土壤养分状况对树木生长和森林生产的影响：来自混交林森林经营试验的证据

IF 2.1 3区农林科学

Trees Pub Date : 2025-05-16 DOI: 10.1007/s00468-025-02627-9

Peilin Xie, Qin Su, Yutian Xin, Klaus von Gadow, Xun Lv, Wenzhen Liu, Qinglin Chang, Pan Wan, Anan Cao, Peng Wang, Xiaolong Shi, Huijing Ma

{"title":"Effects of stand structure and soil nutrient status on tree growth and forest production: evidence from a forest management experiment in a mixed oak forest","authors":"Peilin Xie, Qin Su, Yutian Xin, Klaus von Gadow, Xun Lv, Wenzhen Liu, Qinglin Chang, Pan Wan, Anan Cao, Peng Wang, Xiaolong Shi, Huijing Ma","doi":"10.1007/s00468-025-02627-9","DOIUrl":"10.1007/s00468-025-02627-9","url":null,"abstract":"<div><p>Forest management aims to improve the growing conditions of trees to ensure the sustainable utilization of forest resources. This study compares the effects of different forest management practices on tree growth, forest production, stand structure, and soil nutrient status. We selected a mixed oak forest in the western part of the Qinling Mountains range in China and implemented three forest management practices: target tree forest management (TTFM), structure-based forest management (SBFM), and secondary forest comprehensive silviculture (SFCS). As expected, all three management practices significantly reduce stand mortality rate compared to the unmanaged plots. And these three management practices mainly influenced biomass by affecting soil available potassium, basal area by adjusting tree species diversity, and stand mortality rate by varying spatial structure and tree size diversity. Stand structure and soil nutrient status explained 63.1% and 36.5% of the variation in tree growth and forest production, respectively. Spatial structure, tree size diversity, and tree species diversity explained 34.5%, 26.6%, and 26.6% of the variation in tree growth and forest production, respectively. The results show that managed plots, especially the SBFM, had a positive impact on tree growth and forest production compared with the unmanaged plots. Furthermore, compared to soil nutrient status, stand structure, especially spatial structure, plays a more significant role in tree growth and forest production.</p></div>","PeriodicalId":805,"journal":{"name":"Trees","volume":"39 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073866","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}

引用次数: 0

Cambial activity in five species of the tropical dry forest: dynamics of seasonal changes in the cambial region 五种热带干旱林的形成层活动：形成层区域的季节变化动态

IF 2.1 3区农林科学

Trees Pub Date : 2025-05-15 DOI: 10.1007/s00468-025-02628-8

Marco V. Alvarado, Teresa Terrazas, Alicia Rojas-Leal

{"title":"Cambial activity in five species of the tropical dry forest: dynamics of seasonal changes in the cambial region","authors":"Marco V. Alvarado, Teresa Terrazas, Alicia Rojas-Leal","doi":"10.1007/s00468-025-02628-8","DOIUrl":"10.1007/s00468-025-02628-8","url":null,"abstract":"<div><h3>Key message</h3><p>This study in tropical dry forests reveals cambial activity varies by species and site, linked to rainfall patterns, impacting tree growth and highlighting importance of xylem and phloem development consideration.</p><h3>Abstract</h3><p>Ecological studies on cell division in the vascular cambium have emerged as a key need for understanding tree growth dynamics in tropical dry forests, as well as the effects of year-to-year variation in precipitation. To address this gap, we selected five representative tree species from the tropical dry forest to study dynamics in vascular cambium cell division. The study was conducted at three sites in Mexico with different rainfall regimes from May 2022 to May 2023. Monthly samples were collected, and anatomical features were recorded during cambial activity. The beginning and end of cambial activity were established, and differences between species and sites were analyzed. Linear and exponential models were tested to fit the data. The cambium remained active for six to nine months. Cell divisions toward the phloem maintained cambial activity until the dry season, and in 2023, cambial reactivation occurred with the formation of new phloem. The number of cells in the cambial region showed high monthly variation, with a rapid increase during the first months of the rainy season and a peak between July and November. Cell numbers gradually decreased toward the end of the dry season. Tree species showed low variation between sites. Site analysis supported the adjustment of different growth models and growth rates across sites. Cell divisions were faster at the site with the least precipitation and slower at the wetter site. This study highlights the importance of considering xylem and phloem formation when studying cambial activity, providing valuable insights into tropical dry forest ecology.</p></div>","PeriodicalId":805,"journal":{"name":"Trees","volume":"39 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00468-025-02628-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073704","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}

引用次数: 0

Association of the internal trunk condition of Spathodea campanulata P. Beauv. with tomograms and visual parameters of fall risk 鸡血藤干内状况的关联研究。有断层扫描和跌倒风险的视觉参数

IF 2.1 3区农林科学

Trees Pub Date : 2025-05-05 DOI: 10.1007/s00468-025-02625-x

Tamílis das Graças Emerick, Angeline Martini, Marina Moura de Souza

{"title":"Association of the internal trunk condition of Spathodea campanulata P. Beauv. with tomograms and visual parameters of fall risk","authors":"Tamílis das Graças Emerick, Angeline Martini, Marina Moura de Souza","doi":"10.1007/s00468-025-02625-x","DOIUrl":"10.1007/s00468-025-02625-x","url":null,"abstract":"<div><h3>Key message</h3><p>Visual inspection parameters for predicting the risk of urban trees falling match the actual internal condition of the stem, as well as the results of tomograms (SoT and ERT).</p><h3>Abstract</h3><p>Eliminating the risk of tree falls in urban areas is economically and technically unfeasible. Effective management requires reliable tools to guide interventions and maximize urban forest benefits. This study examined the relationship between visual analysis and the internal condition of <i>Spathodea campanulata</i> trunks, using sonic (SoT) and electrical resistance (ERT) tomograms. The trunk sections from 30 removed trees at UFV (Viçosa-MG) were analyzed. The cavities appeared in 26.7% of cases, cracks in 20%, and wood deterioration in 10%. Tomograms aligned with cutting results in 70% of cases, with sonic tomography being easier for cavity detection and electrical tomography more accurate for wood deterioration. It was not possible to define a visual analysis methodology with association with the problems evidenced in the section. Combining tomographic and visual inspections enhances tree fall risk assessments.</p></div>","PeriodicalId":805,"journal":{"name":"Trees","volume":"39 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908695","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}

引用次数: 0

A case study on the climate-growth signal stability and plasticity in European oak from ecologically contrasting sites – implications for dendroclimatological studies 生态对比地点欧洲橡树气候生长信号稳定性和可塑性的案例研究——对树木气候学研究的启示

IF 2.1 3区农林科学

Trees Pub Date : 2025-05-03 DOI: 10.1007/s00468-025-02620-2

Niels Bleicher, Georg von Arx

{"title":"A case study on the climate-growth signal stability and plasticity in European oak from ecologically contrasting sites – implications for dendroclimatological studies","authors":"Niels Bleicher, Georg von Arx","doi":"10.1007/s00468-025-02620-2","DOIUrl":"10.1007/s00468-025-02620-2","url":null,"abstract":"<div><h3>Key message</h3><p>A multi-parameter-study of quantitative wood anatomy of oak reveals site-dependent climate-growth relations. Many of these are unstable, making climate reconstructions based on oak questionable. Winter temperatures may be an exception.</p><h3>Abstract</h3><p>In Europe, oak tree-ring chronologies spanning millennia offer considerable potential for dendroclimatology. However, site conditions might influence the climate-growth relationships, particularly for species such as lowland European oak (Quercus robur/petraea) that grow under a range of soil moisture conditions. The inclusion of sub-fossil or archaeological samples in chronologies often introduces uncertainty regarding the soil moisture regime in which the trees grew, potentially impacting the contained signal and the suitability of millennia-long oak chronologies as paleoclimate proxies. Here, we present a rare example of a multi-parameter study on the quantitative wood anatomy of oak. We analysed the climate-growth relationships of earlywood vessel sizes, earlywood width and latewood width in trees from five nearby stands situated on wet and dry soils in north-eastern Switzerland that experienced the same atmospheric conditions. We observed a large variety of climate-growth relationships. And we observed both signal plasticity (variability of climate growth relationships between site categories) and classical signal instability over time. In fact, the only stable relationships are between earlywood vessel sizes in trees on wet soils and winter/early spring temperatures. The relationship between late spring/early summer precipitation and latewood width on dry soils is probably stable as well but less reliable. In both cases, the correlation coefficient reaches values as high as <i>r</i> = 0.6. We suggest that signal instability needs to be explored with further and larger datasets before oak can be reliably used as a paleoclimate proxy.</p></div>","PeriodicalId":805,"journal":{"name":"Trees","volume":"39 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143902808","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}

引用次数: 0

Is local the best? Phenotypic plasticity vs local adaptation in a reciprocal transplant experiment with white spruce in Alaska 本地的最好吗？阿拉斯加白云杉的表型可塑性与本地适应性的相互移植实验

IF 2.1 3区农林科学

Trees Pub Date : 2025-05-02 DOI: 10.1007/s00468-025-02626-w

Melanie Zacharias, Timo Pampuch, Andreas Burger, Mario Trouillier, David Würth, Saroj Basnet, Kerstin Haldan, Carl Roland, Martin Schnittler, Manuela Bog, Jürgen Kreyling, Martin Wilmking

{"title":"Is local the best? Phenotypic plasticity vs local adaptation in a reciprocal transplant experiment with white spruce in Alaska","authors":"Melanie Zacharias, Timo Pampuch, Andreas Burger, Mario Trouillier, David Würth, Saroj Basnet, Kerstin Haldan, Carl Roland, Martin Schnittler, Manuela Bog, Jürgen Kreyling, Martin Wilmking","doi":"10.1007/s00468-025-02626-w","DOIUrl":"10.1007/s00468-025-02626-w","url":null,"abstract":"<div><h3>Key message</h3><p><b>Provenances show a high phenotypic plasticity and the ability to grow beyond the cold treeline. Local is best can still be applied.</b></p><h3>Abstract</h3><p>Boreal forests situated in high latitudes face heightened susceptibility to climate extremes and global warming. Understanding the relative influence of adaptation mechanisms like phenotypic plasticity or local adaptation on key traits is crucial to better understand and project species distribution, forest growth and vitality. To address this, we conducted a reciprocal transplant experiment featuring two white spruce (<i>Picea glauca</i> [Moench] Voss) provenances in Alaska, representing cold and dry treelines. Trees from each provenance were reciprocally transplanted across a gradient spanning from dry bluff sites, dry treelines via old-growth forests to cold-limited treelines and beyond. From 2015 to 2022, we monitored survival, vitality, growth, and various needle morphology traits. Results showed that the dry provenance had a superior performance in its home environment. Whereas both provenances performed similarly at the cold site. Survival and vitality rates indicated that elevated temperatures favoured tree growth. Seedling survival and growth are possible beyond the current cold treeline. Further, needle morphology traits were more influenced by the current environment than by origin, thus showing a high phenotypic plasticity. Nevertheless, significant differences in needle morphology among provenances hinted at a genetic base of these traits. Results suggested that local is best can still be applied.</p></div>","PeriodicalId":805,"journal":{"name":"Trees","volume":"39 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00468-025-02626-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143900664","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}

引用次数: 0

Aluminum accumulation in Miconia species of the Atlantic rainforest: phylogenetic insights and soil interactions 大西洋雨林中Miconia物种的铝积累：系统发育的见解和土壤的相互作用

IF 2.1 3区农林科学

Trees Pub Date : 2025-04-29 DOI: 10.1007/s00468-025-02623-z

Luá Taibo Timpone, Lucas F. Bacci, Renato Goldenberg, Gustavo Habermann

{"title":"Aluminum accumulation in Miconia species of the Atlantic rainforest: phylogenetic insights and soil interactions","authors":"Luá Taibo Timpone, Lucas F. Bacci, Renato Goldenberg, Gustavo Habermann","doi":"10.1007/s00468-025-02623-z","DOIUrl":"10.1007/s00468-025-02623-z","url":null,"abstract":"<div><h3>Key message</h3><p><i>Miconia</i> predominantly accumulates Al regardless of soil saturation, though certain clades within this high-accumulating group may exhibit distinctly lower Al concentrations in their leaves.</p><h3>Abstract</h3><p>In acidic soils (pH < 5.0), aluminum (Al) occurs as Al<sup>3+</sup>, which is toxic to most plants. Tolerant species include Al avoiders and those that accumulate Al in the leaves without toxicity symptoms. The genus <i>Miconia</i> (Melastomataceae), mainly found in moist forests, includes Al-accumulators from the Cerrado vegetation in South America. To explore Al accumulation, we collected <i>Miconia</i> species in four Atlantic rainforest areas, southeastern Brazil, hypothesizing that soil Al saturation (m%) could explain the leaf Al concentration. Both parameters were measured, and a phylogenetic analysis was conducted among the species to ascertain whether Al accumulation resulted from m% or was species dependent. The 27 species found grow on dystrophic soils with m% above 70%. Despite expecting non-accumulators (reported at 15% in the genus), all 27 species were Al-accumulators, some exceeding 25,000 mg Al kg<sup>−1</sup> dry leaf, which did not cluster in any specific group in the phylogenetic analysis. Three species (<i>M. willdenowii</i>, <i>M. brunnea</i>, and <i>M. flammea</i>) might have lost the ability to accumulate Al above 1,500 mg kg<sup>−1</sup>. When the same species occurred at different sites, m% did not drive Al accumulation. Accumulation of Al in <i>Miconia</i> within the Atlantic rainforest stands at a 20-fold higher accumulation range when compared to <i>Miconia</i> spp. from Cerrado. Leaf Al accumulation in <i>Miconia</i> species within the Atlantic rainforest appears to remain unaffected by m%. Within a group where a high capacity for Al accumulation seems to be prevalent, species in certain clades may exhibit distinctly lower Al concentration in their leaves.</p></div>","PeriodicalId":805,"journal":{"name":"Trees","volume":"39 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143888666","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}

引用次数: 0

Silver birch (Betula pendula Roth) response to polycyclic aromatic hydrocarbons: implications for growth patterns and secondary metabolite production 白桦（Betula pendula Roth）对多环芳烃的反应：对生长模式和次生代谢物生产的影响

IF 2.1 3区农林科学

Trees Pub Date : 2025-04-25 DOI: 10.1007/s00468-025-02622-0

Greta Striganavičiūtė, Thomas Hoffmann, Wilfried Schwab, Vaida Sirgedaitė-Šėžienė

{"title":"Silver birch (Betula pendula Roth) response to polycyclic aromatic hydrocarbons: implications for growth patterns and secondary metabolite production","authors":"Greta Striganavičiūtė, Thomas Hoffmann, Wilfried Schwab, Vaida Sirgedaitė-Šėžienė","doi":"10.1007/s00468-025-02622-0","DOIUrl":"10.1007/s00468-025-02622-0","url":null,"abstract":"<div><p>Birches (<i>Betula</i>) are crucial trees in Northern Europe, enhancing forest resilience and biodiversity, and aiding in pollutant removal through phytoremediation. Industrialization and urbanization introduce polycyclic aromatic hydrocarbons (PAHs), threatening birch ecosystems and human health. This study investigated the impact of PAHs on the growth and secondary metabolite levels of silver birch (<i>Betula pendula</i> Roth) seedlings from four half-sib families (genetic groups). Seedlings were exposed to phenanthrene, pyrene, naphthalene, and fluoranthene at varying concentrations. Thirty-six compounds from birch leaf extracts were identified using LC–MS analysis, including catechin, quercitrin, caffeoylquinic acid. Significant findings included a reduction in shoot and root lengths, with phenanthrene at 200 µg L<sup>−1</sup> reducing shoot growth by up to 85% and root length by 69% in some families. Total phenol content increased in most families at higher pollutant concentrations, whereas total flavonoid content generally decreased. Notably, (epi)gallocatechin levels increased by up to 200% with naphthalene exposure, and catechin levels increased tenfold in some cases. The results underscore the differential responses among half-sib families to PAH exposure, with higher concentrations generally causing more pronounced negative effects on both growth and secondary metabolism. These findings emphasize the significance of secondary metabolites in plant–environment interactions, where alterations due to PAH exposure could affect birch resilience, and, consequently, the broader ecosystem functions they support.</p></div>","PeriodicalId":805,"journal":{"name":"Trees","volume":"39 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875263","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}

引用次数: 0

The dynamic regulation response to salt stress in poplar 杨树对盐胁迫的动态调控响应

IF 2.1 3区农林科学

Trees Pub Date : 2025-04-18 DOI: 10.1007/s00468-025-02619-9

Wenfang Dong, Xinyu Wang, Kaiye Yang, Hao Zhang, Yuting Ding, Wenshuo Gao, Xiaojin Lei, Caiqiu Gao

{"title":"The dynamic regulation response to salt stress in poplar","authors":"Wenfang Dong, Xinyu Wang, Kaiye Yang, Hao Zhang, Yuting Ding, Wenshuo Gao, Xiaojin Lei, Caiqiu Gao","doi":"10.1007/s00468-025-02619-9","DOIUrl":"10.1007/s00468-025-02619-9","url":null,"abstract":"<div><h3>Key message</h3><p>This study focuses on poplar root's dynamic salt stress responses, finding that Hsp20s may play an important role and screening its upstream regulators.</p><h3>Abstract</h3><p><i>Populus davidiana</i> × <i>P. alba</i>, an excellent tree species, which is widely planted in China, has been seriously affected by salt stress. In this study, the response of poplar roots to salt stress was deeply studied by time-course transcriptome, and a large number of differentially expressed genes (DEGs) were identified at different times. Through weighted gene co-expression network analysis (WGCNA), it was discovered that oxidative and osmotic stress regulation played a crucial role in resisting salt stress in the early salt stress response (3–6 h), and nitrogen metabolize and transport genes were identified as hub genes. At the middle stage of salt stress (12–24 h), the plants initiated extensive reprogramming to adapt to stress, and the transcription factors (TFs), WRKY53, MYB13 and NFXL1, were identified as hub genes. After 48 h of salt stress, seven <i>PdaHsp20</i> genes were identified as hub genes, which may alleviate the damage of salt stress. The genome-wide analysis of Hsp20s showed that the Hsp20 proteins were divided into 11 groups. A three-layer gene regulatory network with <i>PdaHsp20s</i> as the underlying gene was constructed and the unique <i>PdaERF72</i> was found by association analysis with the co-expression network, which may have important functions in regulating <i>PdaHsp20s</i> under salt stress. The expression level analysis of <i>PdaERF72</i> and <i>PdaHsp20s</i>, which have a direct connection with it, also indicated that some of them may have a negative regulation relationship after salt stress. In a word, poplar dynamically responds to salt stress, and different hub genes play a role in different stress stages, which provided a new perspective to reveal the response mechanism of poplar to salt stress.</p></div>","PeriodicalId":805,"journal":{"name":"Trees","volume":"39 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848989","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}

引用次数: 0

Enhancing Cercis siliquastrum seedling quality to meet ecological challenges in afforestation: influence of the combined effects of light, water stress, and zeolite amendment 提高茜草幼苗质量应对造林生态挑战：光、水胁迫和沸石改性联合效应的影响

IF 2.1 3区农林科学

Trees Pub Date : 2025-04-18 DOI: 10.1007/s00468-025-02621-1

Mehdi Heydari, Mehdi Anbari, Abdolali Karamshahi, Somayeh Hajinia, Orsolya Valkó, Bernard Prévosto

{"title":"Enhancing Cercis siliquastrum seedling quality to meet ecological challenges in afforestation: influence of the combined effects of light, water stress, and zeolite amendment","authors":"Mehdi Heydari, Mehdi Anbari, Abdolali Karamshahi, Somayeh Hajinia, Orsolya Valkó, Bernard Prévosto","doi":"10.1007/s00468-025-02621-1","DOIUrl":"10.1007/s00468-025-02621-1","url":null,"abstract":"<div><p>The production of high-quality seedlings is crucial for successful afforestation efforts, particularly in arid and semi-arid regions where drought stress is a major ecological challenge. Light and water stress are interrelated and have a major impact on seedling growth and development. The combined effects of light (25, 50, 75, and 100% of full sunlight) and water stress (field capacity of 100, 75, and 50%) on the morpho-physiological characteristics of <i>Cercis siliquatrum</i> seedlings were investigated in a controlled nursery experiment. Additionally, the effect of zeolite on seedling quality was evaluated. The amount of proline greatly increased with water stress, whereas light had no effect. The highest values of morphological traits were obtained in conditions without water stress and light intensity of 50% and above, whereas water deficit had the most negative effect on seedling quality in low light (L25). The use of zeolite reduced the negative effects of drought stress on seedlings and increased the seedling quality index by 15%. Additionally, zeolite increased the number of leaves (+ 13.5%), leaf dry matter (+ 7.9%), leaf area (12.1%), stem diameter (13.4%), stem length (+ 12.6%), stem dry matter (+ %), root length (+ 21.7%), and root dry matter (+ 12.3%). The results support the interplay hypothesis, which predicts stronger drought effects under both full light and heavy shade conditions compared to moderate shade. Our results also suggest that <i>Cercis siliquastrum</i> is a heliophyte species that thrives in moderate to high light conditions. We also recommended the application of zeolite amendment to reduce the negative effects of drought stress and promote seedling growth and quality.</p></div>","PeriodicalId":805,"journal":{"name":"Trees","volume":"39 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848990","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}

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