罗望子对干热环境的生态适应机理研究  

Adapting Mechanism of Tamarindus indica under Dry-hot Environment

作　　者：纪中华 潘志贤 钱坤建 杨艳鲜 方海东 李建增 

机构地区：[1]云南省农业科学研究院热区生态农业研究所,云南元谋651300

出　　处：《热带生物学报》2011年第4期310-315,共6页Journal of Tropical Biology

基　　金："十二五"国家支撑项目(2011BAC09805);云南省攻关项目(2011CA009)

摘　　要：从根系生长状况、植物组织的含水量、脯氨酸含量、光合特性、蒸腾特点等方面分析,罗望子适应干旱环境的机理,结果表明:罗望子在干旱的环境下,根系发达,利于从土壤吸收更多的水分满足其水分生理需要;组织内的束缚水含量大于自由水的含量,水分代谢减慢;干旱季节植物组织的脯氨酸含量提高,有助于细胞持水,防止脱水作用;通过调节气孔导度来调节光合速率和蒸腾速率适应干旱环境。但这些适应性均对罗望子的产量潜力有抑制作用。In the report, to explore the drought-adaptation mechanism of T. indica, the root growth, water content and proline content in plant tissues, photosynthetic characteristic and transpiration characteristic were analyzed. The results showed that it is under arid environment that the roots of T. indica were greatly proliferated, and which were beneficial for absorbing water from soil to meet the request of physiological water; the bund water content in plant tissue was higher than free water content, which would result in slow hydraulic metabolism which should be helpful to adapt to arid environment; the proline content in plant tissue increased during dry season, and which could facilitate cell water retaining and prevent dehydration; to adapt dry environment, T. indica regulated the photosynthetic rate and transpiration rate by adjusting stomata conductance. However, all these adaptive characters would limit their productivity potential.

关 键 词：罗望子 干热环境 适应性 机理 

分 类 号：S311[农业科学—作物栽培与耕作技术]