4.7 Article

Coupling Relationship of Leaf Economic and Hydraulic Traits of Alhagi sparsifolia Shap. in a Hyper-Arid Desert Ecosystem

期刊

PLANTS-BASEL
卷 10, 期 9, 页码 -

出版社

MDPI
DOI: 10.3390/plants10091867

关键词

coupling relation; leaf mass per area; mesophyll structure; stomata traits; tissue and vein density

资金

  1. National Natural Science Foundation of China [U1903102, 41977050, 41877012]
  2. Government of Xinjiang Uygur Autonomous Region of China [U1903102]
  3. Natural Science Foundation of Xinjiang Uygur Autonomous Region [2021D01D02]
  4. Western Young Scholar Program-B of the Chinese Academy of Sciences [2018-XBQNXZ-B-018]
  5. President's International Fellowship Initiative-Postdoctoral Researchers, Chinese Academy of Sciences [2020PB0002]
  6. Chinese Academy of Sciences [2018-YDYLTD-002]

向作者/读者索取更多资源

The study found that leaf economics and hydraulic traits are coupled in plants in hyper-arid regions, with factors such as mean annual precipitation, soil salt, and soil nutrients influencing these traits. This coupling provides an economical and efficient strategy for plants to adapt to harsh environments.
In this study, Alhagi sparsifolia Shap. was used to test the hypothesis that leaf economic and hydraulic traits are coupled in plants in a hyper-arid region. Five economic traits and six hydraulic traits were examined to explore the relationship. Results showed that the stomatal density (SD) on both surfaces was coupled with maximum stomatal conductance to water vapor (g(wmax)) and leaf tissue density (TD). SD on adaxial surface (SDaba) was significantly positively related to vein density (VD) but negatively related to leaf thickness (LT) and stomatal length on adaxial surface (SLada). Nitrogen concentration based on mass (N-mass) was significantly negatively correlated with leaf mass per area (LMA), LT, and VD, whereas nitrogen concentration based on area (N-area) was significantly positively related to LMA and TD. Mean annual precipitation (MAP) contributed the most to the changes in LT and stomatal length (SL). Soil salt contributed the most to TD, SD, and g(wmax). Soli nutrients influenced the most of LMA and VD. Mean annual temperature contributed the most to N-mass and N-area. In conclusion, the economics of leaves coupled with their hydraulic traits provides an economical and efficient strategy to adapt to the harsh environment in hyper-arid regions.

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