植物抗旱分子机理

The Research Situation about Effects of Nitrogen on Certain Physiological and Biochemical Process in Plants

植物能够通过渗透调节、脱水保护、代谢调整等多种途径适应干旱胁迫。在受到轻度干旱胁迫时，渗透调节是主要途径。当干旱胁迫的强度超出渗透调节的范围时，失水成为必然，Ｌｅａ蛋白及糖类等脱水保护物质在植物中的积累有利于保护生物大分子，尤其是膜系统免受破坏。长期轻度干旱能改变某些植物的代谢途径，有利于植物适应干旱环境。主要阐述了与渗透调节、脱水保护、代谢调整相关的基因表达调控及抗旱基因工程的研究进展。

The paper summarize some relevant data and introduces the current research situation about the offects of intragen on photosynthesis,chlorophyll, photosynthetic rate, effeciency of solar energy utilization,dark reaction and photorespiration etc.,on respiration and on some metabolic enzymes,including nitrate reductase,enzyme protective system of membrane lipid peroxidation.