豆科植物凝集素及其对根瘤菌的识别作用

Legume Lectins and Their Role in the Recognition of Rhizobial Bacteria in Symbiosis Between Legume Plants and Rhizobia

本文讨论了豆科植物凝集素的性质、分布、基因及其表达 ;近年来研究表明识别根瘤菌的因子是豆科植物根上的凝集素。将一种豆科植物的凝集素基因转化到另一种豆科植物后 ,再接种前一种豆科植物的根瘤菌 ,可以使其被侵染和结瘤。由此人们提出了扩大根瘤菌宿主范围到非豆科植物 ,特别是粮食作物范围的可能性。

This paper reviews the properties,distribution of legume lectins,their genes and expression. In recent years,molecular interaction between host legume plants and rhizobial bacteria implies that the factor of recognizing rhizobia is the lectin on the roots of host plants. After the lectin gene is transferred from one type of legume into another, the latter could be finally infected and nodulated by the rhizobial bacteria that originally only harbor in the former legume. From this fact, crop scientists point out the possibility that the rhizobial bacteria might be extended into non_legume host plants,especially cereal plants for their symbiosis.