• 研究论文 •

### 青藏高原东缘常见阔叶木本植物叶片性状对环境因子的响应

1. 兰州大学生命科学学院草地农业生态系统国家重点实验室, 兰州 730000
兰州大学生命科学学院草地农业生态系统国家重点实验室, 兰州
兰州大学生命科学学院草地农业生态系统国家重点实验室, 兰州 730000 ORCID
• 收稿日期:2019-07-08 接受日期:2019-10-02 出版日期:2019-10-20 发布日期:2020-02-24
• 通讯作者: 齐威
• 基金资助:
国家自然科学基金(31770448);国家自然科学基金(31600329);国家重点研发计划(2017YFC0504800);国家重点研发计划(2018YFD0502400)

### Response of leaf traits of common broad-leaved woody plants to environmental factors on the eastern Qinghai-Xizang Plateau

YANG Ji-Hong,LI Ya-Nan,BU Hai-Yan,ZHANG Shi-Ting,QI Wei()

1. State Key Laboratory of Grassland and Agro-Ecosystems, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
• Received:2019-07-08 Accepted:2019-10-02 Online:2019-10-20 Published:2020-02-24
• Contact: QI Wei
• Supported by:
the National Natural Science Foundation of China(31770448);the National Natural Science Foundation of China(31600329);the National Key R&D Program of China(2017YFC0504800);the National Key R&D Program of China(2018YFD0502400)

## 被引次数

2

Abstract:

Aims Leaf trait-environment relationships are critical for predicting the effects of climate change on plants. Our objective was to reveal the response of leaf traits of common broad-leaved woody plants to environmental factors on the eastern Qinghai-Xizang Plateau. Methods We measured 15 leaf traits of 332 species from 666 populations collected at 47 sites on the eastern Qinghai-Xizang Plateau. We investigated the extent of leaf trait variation in this area, and explored the response and adaptation strategies of leaf traits to environment at intra- and inter-species levels. Important findings Traits related to leaf size exhibited relatively high variation, and the leaf area was the most variant trait. Most leaf traits were significantly associated with elevation, except stomatal density. Climatic factors were important drivers of leaf trait variation because they explained 3.3%-29.5% of leaf trait variation. Meantime, temperature had the highest interpretation degree of leaf trait variation, and sunshine hours could explain the variation of most leaf traits. However, the interpretation degree of precipitation was relatively weak. In addition, the significant relationships between leaf traits and environmental (altitude and climatic) factors at intra-species level were far less than at inter-species levels. The reason for the result may be the coordinated variation and trade-off between plant traits, which make the variation of intra-species traits relatively small, and thus weaken the correlation between intra-plant leaf traits and environmental factors. Overall, leaf traits were closely related to woody plant adaptation strategies to the environment, and small, thick leaves and short petioles were selected for high-altitude plants to adapt to harsh environments such as strong winds and low temperature.