生态学报2026，Vol.46Issue(3)：1221-1228,8.DOI:10.20103/j.stxb.202505151173
青藏高原高寒植物叶片非结构性碳水化合物随海拔的变化特征
Variation of foliar non-structural carbohydrates in alpine plants along altitudinal in the Qinghai-Tibetan Plateau
摘要
Abstract
Non-structural carbohydrates(NSC)are critical components of plant photosynthetic products,playing key roles in carbon allocation and stress adaptation.Recent global warming has significantly impacted the structure and function of alpine grassland ecosystems on the Qinghai-Tibet Plateau.Using an elevation gradient(representing increasing environmental stress)in three regions—Gannan,Haibei,and Naqu,this study investigated the response mechanisms of NSC to environmental stress in four plant functional groups(grasses,sedges,legumes,and forbs)across alpine grasslands.Key findings include:(1)NSC content of plant at high elevations was significantly higher than low elevations.(2)Legumes exhibited significantly lower total NSC content than the other three functional groups.(3)Grasses responded to stress by significantly increasing soluble sugar content,while sedges responded by significantly accumulating starch content.These results demonstrated that alpine grassland plants generally elevated NSC levels under environmental stress(e.g.,low temperature and high radiation at high elevations).However,divergent carbon allocation strategies emerged:legumes deployed lower NSC investment;grasses prioritized soluble sugar accumulation for osmotic regulation to enhance stress tolerance;sedges favored starch storage to fuel post-stress regrowth.This study provides critical insights into how alpine grassland plants on the Qinghai-Tibet Plateau respond to environmental stress under global warming,offering a scientific basis for biodiversity conservation and ecosystem management.关键词
非结构性碳水化合物/植物功能群/环境胁迫/碳分配策略/高寒草甸Key words
non-structural carbohydrate/functional groups/environmental stress/carbon allocation strategy/alpine meadow引用本文复制引用
苗琪,索南吉,孙芳慧,陈曦,才让拉毛,夏京,万玛措,袁婉凤,韩信,井新..青藏高原高寒植物叶片非结构性碳水化合物随海拔的变化特征[J].生态学报,2026,46(3):1221-1228,8.基金项目
国家自然科学基金项目(32160285) （32160285）
