COMPETITION FOR NODULE FORMATION BETWEEN EFFECTIVE AND INEFFECTIVE STRAINS OF RHIZOBIUM-MELILOTI
COMPETITION FOR NODULE FORMATION BETWEEN EFFECTIVE AND INEFFECTIVE STRAINS OF RHIZOBIUM-MELILOTI
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DOI：
10.1016/0038-0717(81)90037-7
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发表时间：
1981-01-01
影响因子：
9.7
通讯作者：
AMARGER, N
中科院分区：
文献类型：
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作者：
AMARGER, N
4个有效菌株的无效突变体。分离苜蓿，并测试它们与有效亲本或抗生素抗性突变体在紫花苜蓿上形成根瘤的能力。在所研究的6个案例中，有5个无效突变体与相同来源的有效菌株的竞争能力没有差异。同样有效的菌株之间，以及无效的菌株之间观察到的寄主植物的感染选择的差异。除1对菌株外，竞争力较强的有效菌株（耐药或不耐药）与竞争力较强的无效菌株来源相同。对于这些菌株来说，与其他菌株竞争形成结核的能力是每个亲本菌株的特征。竞争力是独立于效力的，在变异过程中一直保持着。
Ineffective mutants of 4 effective strains of R. meliloti were isolated and tested for their ability to compete with effective parents or antibiotic resistant mutants in the formation of nodules on Medicago sativa. In 5 of the 6 cases studied, ineffective mutants were no different to effective strains of the same origin in their competitive ability. A difference in selection for infection by the host plant was observed between equally effective strains as well as between ineffective strains. Except for 1 pair of strains, the more-competitive effective strains (resistant or not to antibiotics) had the same origin as the more-competitive ineffective strains. For such strains the ability to compete with other strains to form nodules was a characteristic of each parent strain. Competitiveness was independent of effectiveness and had been retained during mutation.