木麻黄根瘤内生菌——弗兰克氏菌侵染特性的研究

Study on Infective Specificity by Frankia Strains from Casuarinaceae

对２５株木麻黄属和异木麻黄属的弗兰克氏菌进行侵染特性研究结果表明，从木麻黄属根瘤分离的弗兰克氏菌菌株在同属不同种木麻黄宿主之间可以交叉感染结瘤，显示其专一性在属的水平上。由异木麻黄属根瘤分离的弗兰克氏菌可以感染木麻黄属的根系结瘤，反映出其专一性在科的水平上。从木麻黄属和异木麻黄属分离的这些供试菌株均能侵染沙棘，结瘤率达４０％～１００％，揭示出弗兰克氏菌具有跨越侵染不同科、属的能力。

Frankia strains from Casuarinaceae were tested for their infective specificity on other host.The results showed there were highly cross inoculation within genus Casuarina .The cross inoculation in the family Casuarinaceae were found by Frankia strains from Allocasuarina .All the Frankia strains from Casuarina and Allocasuarina are infective and effective on Hippophae rhamnoides but not on Allocasuarina littoralis (Salisb.) L.Johnson.