豆科树种根瘤菌共生体系的研究——Ⅱ.豆科树种根瘤菌分类地位

<正>据作者试验观察,豆科树种根瘤菌周生鞭毛、生长快的菌株,在YEM培养基上产生酸,在石蕊牛奶中也产生乳清层,如刺槐、紫穗槐、马蹄针、紫藤等的根瘤菌具有上述性状;极生或亚极生鞭毛、生长慢的菌株在YEM培养基中不产生酸,在石蕊牛奶中也不产生乳清层,如垂耳相思、花梨木、华楹、合欢等树种的根瘤菌具有这些性状。因此,豆科树种根瘤菌也应分列于二个属中(Rhizobium和Bradyrhizobium),这与Jordan提出的新分类系统基本一致。

STUDIES OF SYMBIOTIC SYSTEM OF NODULE BACTERIA AND TREE LEGUMES II. The Taxonomic Position of Root Nodule Bacteria from Tree Legumes

The rhizobia from Robinia pseudoacacia, Sophora viciifolia, Wisteria sinensis and Amorpha fructicosa were peritrichously flagellated and fast growing, with a serum zone formed in litmus milk culture and acid produced on YEM media. The host legumes are of temperate zone origin. Those from Acacia auriculaefor-mis, Dalbergia odorifera, Albizia chinensis, A. julibrissin and Samanea saman were of polar or subpolar flagellum and grew slowly, with their strains forming no serum zone in litmus milk and no acid produced on YEM media. The host legumes are of tropical origin.Therefore, the root nodule bacteria of tree legumes should also belong to two different genera: Rhizobium and Bradyrhizobium. This classification is generally in keeping with the new one put forward by Sordan.