植物叶片水力性状研究综述

许庭毓; 牛香; 王兵

doi:10.12356/j.2096-8884.2022-0005

植物叶片水力性状研究综述

doi: 10.12356/j.2096-8884.2022-0005

许庭毓^{1, 2,},
牛香^{1, 2, ,},
王兵^{1, 2}

1.
中国林业科学研究院森林生态环境与自然保护研究所，国家林业和草原局森林生态环境重点实验室，北京 100091
2.
江西大岗山森林生态系统国家野外科学观测研究站，新余 336606

基金项目: 中央级公益性科研院所基本科研业务费专项（CAFYBB2020ZE003，2060503-20-201）

详细信息

作者简介:
许庭毓：E-mail: 545566961@qq.com

通讯作者:
E-mail: niuxiang@caf.ac.cn

中图分类号: Q945.79
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- 被引次数: 0
出版历程
- 收稿日期: 2022-02-21
- 录用日期: 2022-04-27
- 网络出版日期: 2022-07-11
- 刊出日期: 2022-07-19

Recent Advances in Plant Leaf Hydraulic Traits

Tingyu Xu^{1, 2
,},
Xiang Niu^{1, 2
, ,},
Bing Wang^{1, 2}

1.
Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing 100091, China
2.
Dagangshan National Key Field Observation and Research Station for Forest Ecosystem, Xinyu 336606, China

摘要

摘要: 叶片是水分传输的终端部分，水分在叶片中的传输效率限制了整个植株的水分传输，而叶片水力性状可以表征叶片水分传输方面的特征。目前针对叶片水力性状开展了较多研究并取得了一定的成果。文章在简述叶片水力性状测定指标、测定方法的基础上，阐明了影响叶片水力性状的因素、水力性状之间的权衡和协调关系以及与光合生理过程的响应关系；重点概述了气候变化背景下叶片水力性状的响应机制，并展望了今后的研究重点，以期为进一步了解植物碳水耦合关系提供参考。
- 植物叶片 /
- 水力性状 /
- 胁迫响应 /
- 光合生理
Abstract: Hydraulic characteristics of leaves can represent the features of leaf water transport since leaves are the terminal part of water transportation. Leaf water transport efficiency can constrain the whole plant's water transport. At present, many studies have been conducted on the leaf hydraulic traits of leaves and some results have been obtained. Based on a brief description of leaf hydraulic traits measurement indicators and methods, we discussed the factors affecting leaf hydraulic traits, trade-offs and coordination between hydraulic traits and their response to photosynthetic physiological processes. We focuses on the response mechanism of leaf hydraulic traits under the context of climate change. The future research is prospected, hoping to provide a reference to further understanding of the coupling relationship between carbon and water.
- plant leaves /
- hydraulic traits /
- stress response /
- photosynthetic physiology

HTML全文

表 1 压力−容积曲线确定的水力性状

Table 1. Leaf hydraulic traits determined by pressure-volume curves

变量 Variables	单位 Units	描述　Description	意义 Significance
Ψ_TLP	MPa	Ψ_P= 0，Ψ_W= Ψ_S时对应的点	Ψ_TLP值越负，植物越耐旱。
C_leaf	mol·m⁻²·MPa⁻¹	$\;\;\;{C}_{\text{leaf} } = \dfrac{\mathrm{\Delta }RWC}{\mathrm{\Delta }{\varPsi }_{1} } \times \left(\dfrac{DW}{LA}\right) \times \left(\dfrac{WW}{DW}\right)/{M}$	C_leaf值越大，植物越耐旱。
ε	MPa	$\varepsilon =\dfrac{\mathrm{\Delta }{\varPsi }_{\mathrm{P} } }{\mathrm{\Delta }RW{C} }$	细胞壁刚度，ε值越大，植物越耐旱。
a_f	%	Ψ_W= −∞时的RWC	细胞外含水量，a_f值越大，植物越耐旱。
RWC_TLP	%	Ψ_W= Ψ_TLP时的RWC	细胞开始萎蔫时的叶片相对含水量。RWC_TLP值越大，植物越耐旱。
注：Ψ_P为压力势（MPa）；Ψ_W为叶片水势（MPa）；Ψ_S渗透势（MPa）；ΔRWC/ΔΨ_l表示相对含水量（RWC）与水势的斜率；DW为叶片的干重（g）；LA为叶片的面积（m²）；WW为叶片的饱和重，即相对含水量为100%时的叶片重量（g）；M为水的摩尔质量，即18 g/mol。Ψ_P is the pressure potential（MPa）; Ψ_W is the leaf water potential（MPa）; Ψ_S is the osmotic potential（MPa）; ΔRWC/ΔΨ_l is the slope of the relative water content (RWC) and the water potential; DW is the dry weight of the leaf (g); LA is the area of the leaf (m²); WW is the saturated weight of the leaf, that is, the leaf weight (g) when the relative water content is 100%; M is the molar mass of water, that is, 18 g/mol.

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