生态学杂志2024，Vol.43Issue(11)：3275-3282,8.DOI:10.13292/j.1000-4890.202411.002
干旱河谷鞍叶羊蹄甲(Bauhinia brachycarpa)叶脉性状的纬度格局及成因
Latitudinal pattern and causes of leaf vein traits of Bauhinia brachycarpa in arid valley
摘要
Abstract
The aim of this study was to clarify the biogeographic patterns of leaf functional traits of Bauhinia brachy-carpa,mainly vein density,and the influencing mechanisms.We investigated the variation characteristics of vein density in different grades and leaf morphology of Bauhinia brachycarpa,a dominant shrub along a latitude gradient(23°16′N-31°30′N,101°28′E-103°25′E)in the arid valley of southwest China,and analyzed the relationship among leaf traits.The results showed that vein density and leaf surface area decreased with increasing latitude,and that main vein density was negatively correlated with specific leaf area.The total vein density and minor vein density were independent of leaf morphological traits,such as leaf surface area,while the main vein diameter was positively correlated with leaf morphological traits and specific leaf area.The latitudinal variation of leaf vein traits was affect-ed by the average precipitation in dry season,soil cation exchange capacity,altitude,and annual average tempera-ture.Our results help reveal the ecological adaptation mechanism of xerophytes in arid valleys.关键词
叶脉密度/叶表面积/干旱河谷/纬度梯度Key words
vein density/leaf surface area/arid valley/latitude gradient引用本文复制引用
吴一苓,李芳兰,包维楷,胡慧,杨婷惠,黎小娟..干旱河谷鞍叶羊蹄甲(Bauhinia brachycarpa)叶脉性状的纬度格局及成因[J].生态学杂志,2024,43(11):3275-3282,8.基金项目
国家重大研发计划项目(2017YFC0505105)、第二次青藏高原综合考察研究(2019QZKK0301)和国家科技基础资源调查专项(2019FY202300)资助. （2017YFC0505105）
