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作 者 ：关军锋 李广敏

期 刊 ：植物学通报 2001年 18卷 04期 页码：473-478

关键词：Ca2+；抗旱性；信号传递；

摘 要 ：干旱是制约植物生长发育的主要逆境因素，并抑制根系对钙的吸收。近年来研究表明，外源钙能提高植株的抗旱性，抑制干旱胁迫下活性氧物质的生成，保护细胞质膜的结构，维持正常的光合作用，以及调节激素和一些重要的生化物质代谢；此外，细胞内Ca2+可作为第二信使传递干旱信号，调节干旱胁迫导致的生理反应。

Abstract:Drought is a main stress factor that restricts growth and development in plants and inhibits Ca2+ uptake by root. Recent results showed that exogenous calcium could improve the drought_resistant capability, inhibit the production of active oxygen substances under drought stress, protect the structure of cell plasma membrane, maintain normal photosynthesis, and regulate metabolisms of horm one and some important biochemical substances. Moreover, the internal cellular Ca2+ could act as a second messenger to transduct the drought signal, and regulate the physiological responses induced by drought stress.

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