豆类根瘤菌属中质粒编码性状的保守性。
Conservation of plasmid-encoded traits among bean-nodulating Rhizobium species.
作者信息
Brom Susana, Girard Lourdes, García-de los Santos Alejandro, Sanjuan-Pinilla Julio M, Olivares José, Sanjuan Juan
机构信息
Programa de Genética Molecular de Plásmidos Bacterianos, Centro de Investigación sobre Fijación de Nitrógeno, UNAM, Cuernavaca, Morelos, Mexico.
出版信息
Appl Environ Microbiol. 2002 May;68(5):2555-61. doi: 10.1128/AEM.68.5.2555-2561.2002.
Abstract
Rhizobium etli type strain CFN42 contains six plasmids. We analyzed the distribution of genetic markers from some of these plasmids in bean-nodulating strains belonging to different species (Rhizobium etli, Rhizobium gallicum, Rhizobium giardinii, Rhizobium leguminosarum, and Sinorhizobium fredii). Our results indicate that independent of geographic origin, R. etli strains usually share not only the pSym plasmid but also other plasmids containing symbiosis-related genes, with a similar organization. In contrast, strains belonging to other bean-nodulating species seem to have acquired only the pSym plasmid from R. etli.
摘要
费氏中华根瘤菌模式菌株CFN42含有6个质粒。我们分析了其中一些质粒的遗传标记在属于不同物种（费氏中华根瘤菌、加氏根瘤菌、贾氏根瘤菌、豌豆根瘤菌和弗雷德中华根瘤菌）的豆类结瘤菌株中的分布情况。我们的结果表明，无论地理来源如何，费氏中华根瘤菌菌株通常不仅共享共生质粒，还共享其他含有共生相关基因且组织相似的质粒。相比之下，属于其他豆类结瘤物种的菌株似乎仅从费氏中华根瘤菌获得了共生质粒。
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