荚膜红细菌的分离鉴定及其协同固氮作用

从上海南汇县的水稻根系中分离得到一株光合固氮菌ＳＤＨ２，经形态、细胞膜结构、生理生化等特征的分析鉴定，以伯杰细菌鉴定手册第九版和ＪＦＩｍｈｏｆｆ的光合硫细菌和绿硫细菌的生理学和分类^［１］一文为依据，确定该菌为荚膜红细菌Ｒｈｏｄｏｂａｃｔｅｒｃａｐｓｕｌａｔｕｓ。同时，发现该菌与水稻根表的其它固氮菌之间具有协同生长和协同固氮效应。

STUDIES ON THE ISOLATION AND IDENTIFICATION OF RHODOBATER CAPSULATUS AND THE ACCELERATION OF ITS NITROGEN FIXATION

A pure culture (strain SDH2) of N2-fixing photosynthetitic bacteria was isolated from the rice root inthe suburb of shanghai. On the bases of morphological, physiological and biochemical characteristics, as well asthe analysis of the structure of internal photosythetic membrance we propose the strain SDH2 for Rhodobactercapsulatus according to Bergey's Manual of Determinative Bacteriology (ninth edition) and JF Imhaff's Taxnomyand physiology of Photorophic Purple Bacteria and Green Sulfur Bacteria Growth and nitrogen fixation activity ofSDH2 were accelerated in co-cultures with other two nitrogen-fixing bacteria, SDB4 and SDB6.