大豆基因型 123 群慢生根瘤菌间的结瘤和结瘤竞争。
Nodulation and Competition for Nodulation of Selected Soybean Genotypes among Bradyrhizobium japonicum Serogroup 123 Isolates.
机构信息
Nitrogen Fixation and Soybean Genetics Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Beltsville, Maryland 20705.
出版信息
Appl Environ Microbiol. 1987 Nov;53(11):2631-5. doi: 10.1128/aem.53.11.2631-2635.1987.
Twenty recently obtained field isolates of Bradyrhizobium japonicum serogroup 123 were tested for their nodule mass production on the standard commercial soybean (Glycine max (L.) Merr. cv. Williams) and on two soybean plant introduction (PI) genotypes previously determined to restrict nodulation by strain USDA 123. Four of the field isolates showed similar restricted nodulation on the two genotypes, while all 20 isolates produced a normal amount of nodules on G. max cv. Williams. Serological analyses with adsorbed fluorescent antibodies showed that members of the 123 serotype ranked low in nodulation of the two PIs, in contrast to members of serotypes 127 and 129. Competition studies on the PIs indicated that isolates which were restricted were not competitive for nodule occupancy against strain USDA 110. However, unrestricted isolates of serogroup 123 were very competitive against USDA 110. On G. max cv. Williams, all serogroup 123 isolates tested were very competitive against USDA 110.
20 株新近获得的 123 血清型大豆根瘤菌田间分离株，在标准商业大豆（Glycine max (L.) Merr. cv. Williams）和两种先前确定限制 USDA 123 菌株结瘤的大豆植物引种（PI）基因型上，进行了结瘤大量生产的测试。其中 4 个田间分离株在这两种基因型上表现出相似的结瘤限制，而所有 20 个分离株在 G. max cv. Williams 上产生了正常数量的根瘤。用吸附荧光抗体的血清学分析表明，与血清型 127 和 129 的成员相比，123 血清型的成员在两个 PI 上的结瘤能力较低。在 PI 上的竞争研究表明，受到限制的分离株对 USDA 110 的根瘤占据并不具有竞争力。然而，血清型 123 组的不受限制的分离株对 USDA 110 具有很强的竞争力。在 G. max cv. Williams 上，所有测试的血清型 123 分离株对 USDA 110 都具有很强的竞争力。
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