低空气湿度下气孔运动的调控

郭瑶琳1,*, 王俊斌2,*, 丁博1, 李明1, 陈帅君1, 张卫国3, 黄国中1, 谢晓东1,**
1天津农学院农学与资源环境学院, 天津300384; 2天津农学院基础科学学院, 天津300384; 3内蒙古民族大学农学院, 内蒙古通辽028000

通信作者:郭瑶琳;E-mail: xiex@tjau.edu.cn;Tel: 022-23798697

摘 要:

植物气孔应答气候环境因子的机制, 一直是植物抗逆生理研究领域的热点课题。空气湿度是主要的气候环境因子之一, 人们很早就发现降低空气湿度能导致气孔开度变小, 但到目前为止, 对调控这一生物学过程的机制还知之甚少。本文概述近年来在植物气孔应答低空气湿度信号的运动规律、水被动反馈假说、水主动反馈假说、水力调节与代谢调节的关系等方面的进展, 并基于进化学的理论, 提出了水力调节和代谢调节的反向消长模式, 以期解释大量物种气孔对低空气湿度的不同应答反应。

关键词:气孔运动; 低空气湿度; 调控机制

收稿:2014-03-27   修定:2014-07-22

资助:国家“863”项目(2012AA309)、天津市教委科研计划项目(20130606和20130620)、天津市科委应用基础与前沿技术研究计划项目(14JCYBJC30600)。

Regulation of Stomatal Movement under Low Atmospheric Humidity

GUO Yao-Lin1,*, WANG Jun-Bin2,*, DING Bo1, LI Ming1, CHEN Shuai-Jun1, ZHANG Wei-Guo3, HUANG Guo-Zhong1, XIE Xiao-Dong1,**
1College of Agronomy, Resources and Environmental Sciences, Tianjin Agricultural University, Tianjin 300384, China; 2College of Basic Sciences, Tianjin Agricultural University, Tianjin 300384, China; 3College of Agriculture, National University of Inner Mongolia, Tongliao, Inner Mongolia 028000, China

Corresponding author: GUO Yao-Lin; E-mail: xiex@tjau.edu.cn; Tel: 022-23798697

Abstract:

Studies on mechanisms underlying the plant stomatal responses to climatic factors have been hot topics in the field of plant stress physiology. In earlier studies, stomatal closure was observed in response to low atmospheric humidity, one of key climatic factors, but regulatory mechanisms of this biological process remain elusive. In this review, we summarize the research advances in stomatal movement patterns, hydro-passive and hydro-active feedback theories and the interactions between hydraulic and metabolic regulations. Based on evolutionary differences of stomatal responses to low humidity, we propose a reverse trend model of hydraulic and metabolic regulations to delineate the patterns of stomatal movement for macro-scale species.

Key words: stomatal movement; low atmospheric humidity; regulatory mechanisms

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