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与菜豆形成根瘤的根瘤菌属物种的系统发育关系和宿主范围

Phylogenetic relationships and host range of Rhizobium spp. that nodulate Phaseolus vulgaris L.

作者信息

Hernandez-Lucas I, Segovia L, Martinez-Romero E, Pueppke S G

机构信息

Centro de Investigación sobre Fijación de Nitrogeno, Universidad Nacional Autónoma de México, Cuernavaca, Morelos.

出版信息

Appl Environ Microbiol. 1995 Jul;61(7):2775-9. doi: 10.1128/aem.61.7.2775-2779.1995.

Abstract

We determined the nucleotide sequences of 16S rRNA gene segments from five Rhizobium strains that have been isolated from tropical legume species. All share the capacity to nodulate Phaseolus vulgaris L., the common bean. Phylogenetic analysis confirmed that these strains are of two different chromosomal lineages. We defined the host ranges of two strains of Rhizobium etli and three strains of R. tropici, comparing them with those of the two most divergently related new strains. Twenty-two of the 43 tested legume species were nodulated by three or more of these strains. All seven strains have broad host ranges that include woody species such as Albizia lebbeck, Gliricidia maculata, and Leucaena leucocephala.

摘要

我们测定了从热带豆科植物中分离出的5株根瘤菌菌株16S rRNA基因片段的核苷酸序列。所有菌株都具有使菜豆(Phaseolus vulgaris L.)结瘤的能力。系统发育分析证实这些菌株属于两个不同的染色体谱系。我们确定了两株埃氏根瘤菌(Rhizobium etli)和三株热带根瘤菌(R. tropici)的宿主范围,并将它们与另外两株亲缘关系差异最大的新菌株进行比较。在所测试的43种豆科植物中,有22种能被其中三种或更多菌株结瘤。所有七株菌株都具有广泛的宿主范围,包括诸如阔荚合欢(Albizia lebbeck)、巴西苏木(Gliricidia maculata)和银合欢(Leucaena leucocephala)等木本植物。

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