低磷胁迫下豆科植物有机酸分泌研究进展

The research progress of organic acids metabolism in leguminous plant under phosphorus deficiency

豆科植物在低磷条件下能产生大量有机酸,从而促进根际酸化,提高土壤中磷的有效性。本研究综述了豆科植物在低磷条件下有机酸分泌时间、种类和水平;比较了不同有机酸对磷活化的效率,多元酸效率高于一元酸;阐述了有机酸在豆科植物根际酸化过程中发挥作用,指出有机酸分泌不是根际酸化的单一诱因;低磷下豆科植物有机酸的合成主要在根系进行,其合成和分泌与碳代谢密切相关。最后,对豆科植物有机酸代谢研究方向进行了展望。

Under phosphorus deficiency,large amounts of organic acids were secreted by leguminous plants to promote phosphorus efficiency in the soil.This paper summarized the time course,levels and types of the organic acid in the secretion process.The efficiency of different organic acid in phosphorus activation was also compared.It is pointed out that organic acid secretion induced,but was not the only inducer,rhizosphere acidification.The organic acids were mainly synthesized in root system,and their synthesis had a tight relationship with carbon metabolism.Finally,the research direction of organic metabolism in future was discussed.