热带亚热带植物学报2026，Vol.34Issue(4)：365-374,10.DOI:10.11926/jtsb.5041
西双版纳热带季节雨林优势树种叶片干旱耐受和机械抗性的协同关系
Coordination Relationship Between Drought Tolerance and Mechanical Resistance of Leaves of Dominant Tree Species,in Xishuangbanna Tropical Seasonal Rainforest,Southwest China
摘要
Abstract
Regional droughts caused by global climate change pose a severe challenge to plant survival.Plant drought resistance and mechanical resistance are key factors determining their growth and survival.Tropical forests,as the terrestrial ecosystems with the highest biodiversity and productivity on Earth,however,the relationship between drought tolerance and mechanical resistance of their dominant tree species leaves remains unclear.This study took the dominant tree species in the tropical seasonal rainforest of Xishuangbanna as the research object.By measuring key morphological and hydraulic traits such as the pressure-volume curve of leaves,leaf mechanical resistance(LMR),leaf dry matter content(LDMC),and leaf mass per area(LMA),and combining phylogenetic analysis to explore evolutionary relationships,the relationship between leaf drought tolerance and mechanical resistance and its driving mechanism were further analyzed.The results showed that the morphological,hydraulic traits and mechanical resistance of leaves of tropical seasonal rainforest tree species varied greatly and were not significantly constrained by phylogeny;leaf drought resistance and mechanical resistance were significantly positively correlated with LMA and LDMC;leaf drought tolerance and mechanical resistance were also significantly positively correlated,and this co-variation relationship was regulated by leaf structural investment.This reveals a synergistic relationship between leaf drought resistance and mechanical resistance in dominant tree species of tropical seasonal rainforests,providing a scientific basis for understanding the ecological adaptation strategies of plants in this region and predicting the dynamics of forest communities under climate change.关键词
西双版纳/热带季节雨林/膨压丧失点/叶片抗旱性/叶片机械抗性Key words
Xishuangbanna/Tropical seasonal rainforest/Turgor loss point/Leaf drought resistance/Leaf mechanical resistance引用本文复制引用
张志钢,杨丽,戴芳煜,张树斌..西双版纳热带季节雨林优势树种叶片干旱耐受和机械抗性的协同关系[J].热带亚热带植物学报,2026,34(4):365-374,10.基金项目
云南省重点研发计划项目(202403AC100028) （202403AC100028）
云南省中青年学术和技术带头人后备人才项目(202405AC350012) （202405AC350012）
云南省"兴滇英才支持计划"高端外国专家项目(XDYC-GDWZ-2024-0018) （XDYC-GDWZ-2024-0018）
中国科学院西双版纳热带植物园"十四五"科技创新规划项目(XTBG-1450102)资助 This work was supported by the Key R&D Program of Yunnan(Grant No.202403AC100028),the Program for Youth Academic and Technical Leading Talent Reserve in Yunnan(Grant No.202405AC350012),the Project for High-end Foreign Experts of"Xingdian Talents Support Program"in Yunnan(Grant No.XDYC-GDWZ-2024-0018),and the Project for"14th Five-Year Plan"Science and Technology Innovation in Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences(Grant No.XTBG-1450102). （XTBG-1450102）
