《生命科学》 2024, 36(10): 1279-1288

植物叶肉导度影响因素研究进展

张玉洁¹ , 孙东升¹ , 雷长英² , 李自良¹ , 韩吉梅³ , 张旺锋¹ , 张亚黎^1,*

¹石河子大学农学院/省部共建国家重点实验室培育基地绿洲生态农业兵团重点实验室，石河子 832003 ²西北农林科技大学农学院，杨凌 712100 ³南京林业大学林学院/南方现代林业协同创新中心，南京 210037

摘　要：

叶肉导度(gm) 是植物光合作用的重要限制因素之一，用于表征CO2 从气孔下腔传输到叶绿体羧化位点的难易程度，受到多种因素的影响，包括内部生理状况和外部环境因素。本文重点介绍引起gm 变化的生物物理屏障，主要包括细胞壁组分与厚度和面向细胞间隙的叶绿体面积，以及生物化学因素如水孔蛋白和碳酸酐酶；并阐述进化和驯化过程中gm 及其影响因素的变化；分析gm 对外界环境如水分、温度、光照以及营养变化的响应及其内在的调控机制。

通讯作者：张亚黎 , Email:zhangyali_cn@foxmail.com

Research progress on the influencing factors of mesophyll conductance

ZHANG Yu-Jie¹ , SUN Dong-Sheng¹ , LEI Zhang-Ying² , LI Zi-Liang¹ , HAN Ji-Mei³ , ZHANG Wang-Feng¹ , ZHANG Ya-Li^1,*

¹Key Laboratory of Oasis Eco-Agriculture, Xinjiang Production and Construction Corps, College of Agronomy, Shihezi University, Shihezi 832003, China ²College of Agronomy, Northwest A&F University, Yangling 712100, China ³Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing 210037, China

Abstract:

Mesophyll conductance (gm), one of the major limiting factors of photosynthesis, is used to characterize the accessibility of CO2 transport from the sub-stomatal cavity to the carboxylation sites in the chloroplast stroma. It is influenced by multiple factors including internal physiological status and external environmental factors. This paper focuses on the biophysical barriers that contribute to the changes in gm, mainly the components and thickness of the cell wall and the surface area of chloroplasts exposed to intercellular airspaces per unit leaf area, as well as the biochemical factors including aquaporins and carbonic anhydrase. On this basis, we expound the variations of gm and its influencing factors during evolution and domestication. We also analyze the response of gm and the internal regulatory mechanisms in response to external environmental changes of water, temperature, light and nutritional status.

Communication Author：ZHANG Ya-Li , Email:zhangyali_cn@foxmail.com