Plant Diversity最新文献

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Chromosome-level genome assembly and population genomics analysis of Camellia rubituberculata provide insights into adaptation to karst habitats. 茶树染色体水平的基因组组装和群体基因组学分析为茶树适应喀斯特生境提供了新的思路。
IF 5.9 1区 生物学
Plant Diversity Pub Date : 2025-09-11 eCollection Date: 2026-03-01 DOI: 10.1016/j.pld.2025.09.004
Chao Yan, Ming-Tai An, Ming Tang, Xin-Xiang Bai, Xu Xiao, Zhao-Hui Ran, Zhi Li
{"title":"Chromosome-level genome assembly and population genomics analysis of <i>Camellia rubituberculata</i> provide insights into adaptation to karst habitats.","authors":"Chao Yan, Ming-Tai An, Ming Tang, Xin-Xiang Bai, Xu Xiao, Zhao-Hui Ran, Zhi Li","doi":"10.1016/j.pld.2025.09.004","DOIUrl":"10.1016/j.pld.2025.09.004","url":null,"abstract":"<p><p>Karst flora confined to isolated 'habitat islands' evolve specialized adaptations and unique traits, serving as ideal models for investigating adaptive evolution and species diversification mechanisms. <i>Camellia rubituberculata</i>, endemic to the karst habitats of Guizhou, China, can serve as a model for adaptive evolution and diversity in karst-endemic woody species. However, the lack of a chromosome-level genome for this species has limited in-depth studies on its adaptations to karst and posed a barrier to its genetic improvement. In this study, a chromosome-level genome assembly of <i>C. rubituberculata</i> was generated, with 15 pseudo-chromosomes and a genome size of 2.50 Gb (scaffold N50 = 168.34 Mb, 55,302 protein-coding genes). Comparative genomics revealed two whole-genome duplications (WGDs), namely, an ancient γ-event (∼120 Mya) and a subsequent genus-wide event (∼86 Mya), after which gene families linked to karst adaptation (e.g., photosynthesis) were significantly expanded. Selective sweep analysis showed that selected genes were associated with phytohormone transmission and metabolism. Genes functionally annotated as involved in stress responses-including SAUR, BSK, NCL, CDPK, and NDPK-participate in calcium homeostasis and ion transport pathways under karst-specific stresses. MYB transcription factors, which are crucial in plant responses to stresses, including drought, may be key for adaptation to the high salinity and drought stress in karst environments. The divergent selection in wild and cultivated groups highlight key adaptations in plant hormone transduction and calcium transport. By elucidating karst adaptation in <i>C. rubituberculata</i>, this work establishes essential genomic resources for advancing genetic evolution research and molecular breeding across <i>Camellia</i> species.</p>","PeriodicalId":20224,"journal":{"name":"Plant Diversity","volume":"48 2","pages":"246-261"},"PeriodicalIF":5.9,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13071458/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147691880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Complex plastome structural variation caused by intermolecular and intramolecular recombination accounts for leaf variegation in Heptapleurum ellipticum. 分子间和分子内重组引起的复杂质体结构变异是七胸膜叶片杂化的主要原因。
IF 5.9 1区 生物学
Plant Diversity Pub Date : 2025-09-08 eCollection Date: 2026-01-01 DOI: 10.1016/j.pld.2025.09.003
Kainan Ma, Shuaixi Zhou, Ying Liu, Renchao Zhou
{"title":"Complex plastome structural variation caused by intermolecular and intramolecular recombination accounts for leaf variegation in <i>Heptapleurum ellipticum</i>.","authors":"Kainan Ma, Shuaixi Zhou, Ying Liu, Renchao Zhou","doi":"10.1016/j.pld.2025.09.003","DOIUrl":"10.1016/j.pld.2025.09.003","url":null,"abstract":"<p><p>Plastome variation, including single spontaneous nucleotide substitutions and single insertions/deletions, is the major source of leaf variegation in plants. Additionally, one recent study has showed that a simple plastome structural variation, which is induced by one pair of small inverted repeats, can also result in leaf variegation. Here we show a complex plastome structural variation caused by intermolecular and intramolecular recombination across three pairs of small inverted repeats accounts for leaf variegation in a widely cultivated shrub <i>Heptapleurum ellipticum</i> (Araliaceae). This plastome structural variation contains two deletions and two duplications, resulting in dramatic expansion of IRs, substantial contraction of LSC and loss of 11 genes that essential for photosynthesis. Plastome heteroplasmy was detected in both green and albino sectors of variegated leaves. Relative to green sectors, albino sectors in the variegated leaves exhibit significantly reduced expression for the 11 genes lost in the mutated plastome as well as 26 other genes, but significantly increased expression for one gene related to translation apparatus. Optical and transmission electron microscopy observations showed that mesophyll cells of albino sectors possess plastids lacking grana lamellae, which likely carry the mutated plastome and contribute to albinism. In both sectors, the first layer of spongy mesophyll cells beneath the lower epidermis contains normal chloroplasts, suggesting periclinal division of the lower epidermis during development. Our study demonstrates that multiple small repeats can collectively mediate intra- and inter-molecular recombination in plastome and offers a new mechanism accounting for leaf variegation in plants.</p>","PeriodicalId":20224,"journal":{"name":"Plant Diversity","volume":"48 1","pages":"140-150"},"PeriodicalIF":5.9,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12918204/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147271792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spatially biased collections and the failure to cover all wild genetic clusters in plant populations under ex situ conservation. 在迁地保护下的植物种群中存在空间偏差和未能覆盖所有野生遗传簇。
IF 5.9 1区 生物学
Plant Diversity Pub Date : 2025-09-04 eCollection Date: 2026-01-01 DOI: 10.1016/j.pld.2025.09.001
Zhiqiang Xiao, Hui Liu, Guiyun Huang, Di Wu, Liwen Qiu, Jinhua Wu, Xinzeng Wei, Mingxi Jiang
{"title":"Spatially biased collections and the failure to cover all wild genetic clusters in plant populations under <i>ex situ</i> conservation.","authors":"Zhiqiang Xiao, Hui Liu, Guiyun Huang, Di Wu, Liwen Qiu, Jinhua Wu, Xinzeng Wei, Mingxi Jiang","doi":"10.1016/j.pld.2025.09.001","DOIUrl":"10.1016/j.pld.2025.09.001","url":null,"abstract":"<p><p>Successful <i>ex situ</i> conservation of plant populations requires a high degree of genetic representativeness. However, spatially biased sampling in <i>ex situ</i> conservation efforts may fail to capture all wild genetic clusters for species with range-wide genetic structure. To investigate the extent of spatially biased sampling in living collections and the coverage of wild genetic clusters in plant populations under <i>ex situ</i> conservation worldwide, we combined a global synthesis of <i>ex situ</i> conservation efforts with a case study of an endangered riparian plant species, <i>Myricaria laxiflora</i>. Our analysis of <i>ex situ</i> conservation worldwide revealed that the majority (82.6%) of <i>ex situ</i> populations fail to cover all wild genetic clusters, largely due to spatially biased sampling with low geographic coverage. Our case study of <i>M. laxiflora</i> showed that genetic diversity differed between the <i>ex situ</i> and upstream populations, while it was comparable between <i>ex situ</i> populations and other wild populations. However, current <i>ex situ</i> populations did not cover all wild genetic clusters, as the upstream genetic cluster was previously uncollected. Our study suggests that the failure to cover all wild genetic clusters in <i>ex situ</i> populations is a widespread issue, and <i>ex situ</i> populations with high genetic diversity can also fail to cover all wild genetic clusters. In future <i>ex situ</i> conservation programs, both the importance of high genetic diversity and the high coverage of wild genetic clusters should be prioritized.</p>","PeriodicalId":20224,"journal":{"name":"Plant Diversity","volume":"48 1","pages":"75-83"},"PeriodicalIF":5.9,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12918182/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147271793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Differences in leaf heat and drought tolerance but not cold tolerance between karst and non-karst forest plants. 喀斯特与非喀斯特森林植物叶片耐热性和耐旱性的差异,但不包括耐寒性。
IF 5.9 1区 生物学
Plant Diversity Pub Date : 2025-08-26 eCollection Date: 2026-03-01 DOI: 10.1016/j.pld.2025.08.006
Qiufeng Ning, Yin Wen, Hui Liu, Jiawei Li, Yunpeng Nie
{"title":"Differences in leaf heat and drought tolerance but not cold tolerance between karst and non-karst forest plants.","authors":"Qiufeng Ning, Yin Wen, Hui Liu, Jiawei Li, Yunpeng Nie","doi":"10.1016/j.pld.2025.08.006","DOIUrl":"10.1016/j.pld.2025.08.006","url":null,"abstract":"<p><p>Ongoing climate change and increasingly frequent extreme precipitation events pose greater threats to plant survival. Plants in the karst environment may face heightened risks because shallow soils and poor water retention amplify drought and temperature stresses, yet their physiological tolerances remain poorly understood. In this study, we aimed to investigate the leaf physiological tolerance strategies to drought and temperature stress in plants from karst versus non-karst forests, and to quantify the relative contributions of lithology and phylogeny to variation in these tolerances. In this study, we measured leaf photosynthetic heat and cold tolerance, leaf turgor loss points, and morphological and anatomical traits in 39 dominant woody species from karst and non-karst forests in Guangxi, China. We used Welch's t-tests to compare leaf trait differences between forest types, evaluated the trait relationships with Pearson correlation analysis, and partitioned the contributions of lithology and phylogeny to trait variation using phylogenetic eigenvector regression (PVR). Karst species exhibited more negative leaf turgor loss points (π<sub>tlp</sub>) and lower heat tolerance (T50<sub>heat</sub>) than non-karst species, whereas cold tolerance (T50<sub>cold</sub>) did not differ between habitats. Leaf thickness (LT) and leaf mass per area (LMA) were positively correlated with T50<sub>heat</sub>, suggesting that higher structural investments enhance heat tolerance, but are not correlated with T50<sub>cold</sub> and π<sub>tlp</sub>. Phylogeny predominantly explains the variation in T50<sub>cold</sub> and the second principal component (PC2), whereas lithology primarily drove variation in π<sub>tlp</sub> and T50<sub>heat</sub>. Because karst species have lower heat tolerance, they may face a higher risk of thermal damage under future climate warming.</p>","PeriodicalId":20224,"journal":{"name":"Plant Diversity","volume":"48 2","pages":"363-372"},"PeriodicalIF":5.9,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13071437/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147691829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Soil nutrients and heavy metals jointly shape spontaneous plant functional groups in abandoned mining areas. 土壤养分和重金属共同塑造了废弃矿区自发的植物功能群。
IF 5.9 1区 生物学
Plant Diversity Pub Date : 2025-08-26 eCollection Date: 2026-03-01 DOI: 10.1016/j.pld.2025.08.007
Xin-Qi Yuan, Yin-Jie Li, Yao Zhao, Fu-Xiang Peng, Wen-Jing Zhang, Chang-E Liu, Chang-Qun Duan
{"title":"Soil nutrients and heavy metals jointly shape spontaneous plant functional groups in abandoned mining areas.","authors":"Xin-Qi Yuan, Yin-Jie Li, Yao Zhao, Fu-Xiang Peng, Wen-Jing Zhang, Chang-E Liu, Chang-Qun Duan","doi":"10.1016/j.pld.2025.08.007","DOIUrl":"10.1016/j.pld.2025.08.007","url":null,"abstract":"<p><p>Ecological recovery of abandoned mining areas requires developing and implementing effective nature-based solutions. However, ecological processes that underlie the establishment, development, and long-term persistence of plant functional groups within natural plant communities remain poorly understood. Here, we hypothesized that local plant species in abandoned mining areas respond to the harsh environmental conditions of contaminated soils by adjusting their functional traits and survival strategies, thereby enhancing the stability of spontaneous plant communities through the development of distinct plant functional groups. To test this hypothesis, we assessed the responses of plant functional groups to heavy metal contamination and identified both environmental factors and functional traits that influence these plant functional groups. We found that heavy metal pollution induced shifts in plant functional groups and overall community composition. Specifically, stress-tolerant plant abundance fluctuated and declined; ruderal plant abundance initially decreased before increasing; and competitor plant abundance increased. The environmental factors that influenced plant functional group abundance include soil pH, heavy metal concentrations, and nutrient content. Overall, our results specifically indicate that the successional replacement of plant functional groups and the ecological recovery of plant communities in abandoned mining areas depend on soil total nitrogen levels.</p>","PeriodicalId":20224,"journal":{"name":"Plant Diversity","volume":"48 2","pages":"409-421"},"PeriodicalIF":5.9,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13071444/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147691692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Divergence of mating systems in Primula oreodoxa: Insights from transplant experiments and mating portfolios. 报春花交配系统的分化:来自移植实验和交配组合的见解。
IF 5.9 1区 生物学
Plant Diversity Pub Date : 2025-08-23 eCollection Date: 2026-01-01 DOI: 10.1016/j.pld.2025.08.005
Gui Zeng, Kai Zhang, Dianxiang Zhang, Shuai Yuan
{"title":"Divergence of mating systems in <i>Primula oreodoxa</i>: Insights from transplant experiments and mating portfolios.","authors":"Gui Zeng, Kai Zhang, Dianxiang Zhang, Shuai Yuan","doi":"10.1016/j.pld.2025.08.005","DOIUrl":"10.1016/j.pld.2025.08.005","url":null,"abstract":"<p><p>Transitioning from outcrossing to self-fertilization is a widespread reproductive strategy in plants, especially in environments where pollination is limited. Despite its prevalence, this transition has rarely been examined using transplant experiments, and previous studies have overlooked the contribution of the male parent in elucidating mating diversity. In this study, six transplanted populations were generated to investigate the relationship of the pollination environment with plant mating patterns and fecundity in <i>Primula oreodoxa</i>, a species that exhibits both distyly (predominantly outcrossing) and homostyly (predominantly selfing), based on data from 3582 individuals and 11 SSR markers. Homostylous plants had fruit and seed sets comparable to those of distylous plants at lower elevations but exhibited a clear reproductive advantage at higher elevations, particularly compared with the S morph. As elevation increased, the populational selfing rates increased, and the genetic diversity among the progeny was reduced. Furthermore, the visitation frequency of long-tongued pollinators was negatively and positively correlated with the selfing rate and number of mates, respectively, in the L and S morphs. In contrast, short-tongued pollinator visitation showed opposite correlations with the selfing rate and number of mates in homostylous morphs. In most populations, individuals functioned consistently as both female and male, and mating occurred randomly, suggesting a breakdown of the distyly polymorphism. Overall, our results provide experimental validation of the reproductive advantages of homostyly at high elevations by revealing that pollinator visitation shapes the selfing rate and mating diversity within populations, potentially driving the divergence of mating systems along environmental gradients.</p>","PeriodicalId":20224,"journal":{"name":"Plant Diversity","volume":"48 1","pages":"169-180"},"PeriodicalIF":5.9,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12918206/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147271784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Chromosome-level genome assembly of Myristica yunnanensis sheds light on genomic limitations underlying its critically endangered status in China. 云南肉豆蔻(Myristica yunnanensis)染色体水平的基因组组装揭示了其在中国处于极度濒危状态的基因组局限性。
IF 6.3 1区 生物学
Plant Diversity Pub Date : 2025-08-23 eCollection Date: 2025-09-01 DOI: 10.1016/j.pld.2025.08.004
Yongting Zhang, Zihe Li, Xue Liu, Peng Zeng, Chuan Peng, Botong Zhou, Yingmei Peng, Wenbo Zhu, Jian Huang, Jing Cai
{"title":"Chromosome-level genome assembly of <i>Myristica yunnanensis</i> sheds light on genomic limitations underlying its critically endangered status in China.","authors":"Yongting Zhang, Zihe Li, Xue Liu, Peng Zeng, Chuan Peng, Botong Zhou, Yingmei Peng, Wenbo Zhu, Jian Huang, Jing Cai","doi":"10.1016/j.pld.2025.08.004","DOIUrl":"10.1016/j.pld.2025.08.004","url":null,"abstract":"<p><p>•The first chromosome-level assembly for the Myristicaceae family.•Myristicaceae represents the earliest diverging families within the Magnoliales•Genomic constraints and climatic fluctuations may have contributed to the endangered status of <i>Myristica</i> <i>yunnanensis</i>.</p>","PeriodicalId":20224,"journal":{"name":"Plant Diversity","volume":"47 5","pages":"843-847"},"PeriodicalIF":6.3,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12496533/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145239495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fragmentation effects on β-diversity: The role of abundance and intraspecific trait variation in shaping taxonomic, functional, and phylogenetic patterns. 片段化效应对β多样性的影响:丰度和种内性状变异在形成分类、功能和系统发育模式中的作用。
IF 6.3 1区 生物学
Plant Diversity Pub Date : 2025-08-22 eCollection Date: 2025-11-01 DOI: 10.1016/j.pld.2025.08.003
Aiying Zhang, Xiaofei Wei, Donghao Wu, Zhonghan Wang, Mingjian Yu, Lingfeng Mao
{"title":"Fragmentation effects on β-diversity: The role of abundance and intraspecific trait variation in shaping taxonomic, functional, and phylogenetic patterns.","authors":"Aiying Zhang, Xiaofei Wei, Donghao Wu, Zhonghan Wang, Mingjian Yu, Lingfeng Mao","doi":"10.1016/j.pld.2025.08.003","DOIUrl":"10.1016/j.pld.2025.08.003","url":null,"abstract":"<p><p>Habitat fragmentation dramatically reshapes species richness and community composition. However, most estimates of β-diversity rely on incidence-based metrics, which consider only species presence/absence. Here, we introduce a novel framework that explicitly incorporates species abundance and intraspecific trait variation (ITV) into the quantification of taxonomic, functional, and phylogenetic β-diversity, allowing a more nuanced understanding of community differentiation. To demonstrate the utility of this framework, we quantified the effects of island area and isolation on β-diversity across plant communities in China's Thousand Island Lake. Abundance-weighted taxonomic multiple-site/pairwise β-diversity showed substantially higher nestedness and stronger nestedness-area relationship than incidence-based metrics, indicating that species-poor communities are not only subsets of richer ones but share similar abundance hierarchies, highlighting strong environmental filtering and hierarchical species sorting. We also found that the turnover component was less sensitive to isolation, suggesting limited dispersal effects. Incidence-based functional and phylogenetic distances increased with differences in island area, but these associations weakened or disappeared in abundance-weighted measures, suggesting stronger environmental filtering and functional/phylogenetic clustering among larger islands. Only abundance-weighted standardized effect sizes increased with island area differences. Additionally, ITV further amplified functional nestedness and buffered the influence of isolation on turnover, emphasizing its role in mitigating dispersal limitations. By jointly considering abundance and ITV, two often-overlooked but critical dimensions, this study advances our understanding of how fragmentation shapes β-diversity. These findings highlight the importance of integrating abundance-weighted and trait-based metrics into conservation strategies to better detect functionally important species, prioritize larger habitat patches, and design biodiversity monitoring that captures within-species variation.</p>","PeriodicalId":20224,"journal":{"name":"Plant Diversity","volume":"47 6","pages":"981-990"},"PeriodicalIF":6.3,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12800769/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145989804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The advantage of low leafing intensity under water limitation: An illustrative study of Populus euphratica in hyper-arid climates. 水分限制下低叶强的优势:极度干旱气候下胡杨的说明性研究。
IF 5.9 1区 生物学
Plant Diversity Pub Date : 2025-08-14 eCollection Date: 2026-01-01 DOI: 10.1016/j.pld.2025.08.001
Dong He, Lu Han, Chun-Hui Feng, En-Rong Yan
{"title":"The advantage of low leafing intensity under water limitation: An illustrative study of <i>Populus euphratica</i> in hyper-arid climates.","authors":"Dong He, Lu Han, Chun-Hui Feng, En-Rong Yan","doi":"10.1016/j.pld.2025.08.001","DOIUrl":"10.1016/j.pld.2025.08.001","url":null,"abstract":"<p><p>The trade-off between leaf size and leafing intensity (i.e., the number of leaves per unit stem size) is a key axis of trait covariation across the diversity of plant foliage deployment. However, the functional significance of leafing intensity and its possible combinations with leaf size in dealing with water limitation remains unclear. Using <i>Populus euphratica</i> as an illustrative tree species growing in hyper-arid climates, we investigated how leaf size and leafing intensity co-varied under varying water stresses. In the Ebinor lowlands and the upper reaches of the Tarim River (NW China), we sampled > 1800 current-year twigs from 505 trees across 14 sites along a climatic gradient characterized by precipitation, potential evapotranspiration and vapor pressure deficit. Leafing intensity based on stem mass (LIM) decreased with climatic aridity, primarily due to greater stem mass, but not fewer leaves. This indicates a higher investment in structural support for leaf attachment under water stress. Both leaf area and mass decreased with LIM at a lower-than-proportional rate, with the decrease in leaf size being more pronounced under drier climates. This suggests that higher LIM incurs a high cost of reducing leaf size in water-limited habitats. These findings challenge the assumption that higher leafing intensity always confers an advantage ready for environmental stresses due to higher developmental flexibility offered by more axillary buds. Rather, we propose that a strategy of lower leafing intensity, with greater structural support for leaf attachment and less compromise in leaf size, can be advantageous under water limitation.</p>","PeriodicalId":20224,"journal":{"name":"Plant Diversity","volume":"48 1","pages":"160-168"},"PeriodicalIF":5.9,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12919295/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147271807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mycorrhizal communities in Orchidaceae are likely shaped by plant trophic mode and biogeography but not phylogeny. 兰科菌根群落的形成可能与植物营养模式和生物地理有关,而与系统发育无关。
IF 5.9 1区 生物学
Plant Diversity Pub Date : 2025-08-13 eCollection Date: 2026-01-01 DOI: 10.1016/j.pld.2025.08.002
Deyi Wang, Vincent S F T Merckx, Hans Jacquemyn, Sofia I F Gomes
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