应用生态学报2024，Vol.35Issue(3)：606-614,9.DOI:10.13287/j.1001-9332.202403.003
青藏高原东缘川滇高山栎和西南花楸叶片性状对海拔的响应
Responses of leaf traits to altitude in Quercus aquifolioides and Sorbus rehderiana on the eastern edge of the Qinghai-Tibet Plateau,China
摘要
Abstract
As the most senstitive plant organs to environmental changes,leaves serve as crucial indicators of plant survival strategies.We measured the morphology,anatomical traits,gas exchange parameters,and chlorophyll fluo-rescence parameters of Quercus aquifolioides(evergreen broad-leaved)and Sorbus rehderiana(deciduous broad-leaved)at altitudes of 2600,2800,3000,3200 and 3400 m on the eastern edge of the Qinghai-Tibet Plateau,China.We explored the similarity and difference in their responses to altitude change and the ecological adaptation strategy.The results showed that as the altitude increased,leaf dry matter content of Q.aquifolioides decreased,that of S.rehderiana increased,leaf size for both species gradually decreased,and the palisade coefficient of Q.aquifolioides showed a decreasing trend,contrasting with the increasing trend in S.rehderiana.As the altitude in-creased,the thickness of leaves,palisade tissue,spongy tissue,upper epidermis,and lower epidermis of both spe-cies increased significantly,with the increment of 22.4％,4.9％,45.1％,23.3％,19.6％,and 28.2％,46.9％,8.9％,25.9％,20.8％ at altitude of 3400 m,respectively,compared with the altitude of 2600 m.The gas exchange and chlorophyll fluorescence parameters of S.rehderiana significantly increased with increasing altitude,while Q.aquifolioides showed the opposite trend.Leaf anatomical traits,gas exchange,and chlorophyll fluorescence parameters of both species displayed considerable plasticity.There were significant correlations among most leaf traits and between leaf traits and altitude.The survival strategy of Q.aquifolioides was more conservative in response to altitude changes,while that of S.rehderiana was more active.Both species adapted to different altitudes by adjusting their own traits.关键词
川滇高山栎/西南花楸/叶片功能性状/解剖性状/光合特性Key words
Quercus aquifolioides/Sorbus rehderiana/leaf functional trait/anatomical trait/photosynthetic charac-teristics引用本文复制引用
邢红爽,冯秋红,史作民,刘顺,许格希,陈健,巩闪闪..青藏高原东缘川滇高山栎和西南花楸叶片性状对海拔的响应[J].应用生态学报,2024,35(3):606-614,9.基金项目
本文由国家自然科学基金项目(32171506)、国家重点研发计划项目(2021YFD2200405)和中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2021ZA002-2)资助. （32171506）
