Departments of Microbiology and Soil Science, Oregon State University, Corvallis, Oregon 97331-3804.
Appl Environ Microbiol. 1987 Mar;53(3):596-7. doi: 10.1128/aem.53.3.596-597.1987.
Indigenous serotypes 1-01 and 2-02 of Rhizobium trifolii occupied similar percentages (18 to 23%) of root nodules on soil-grown subclover (Trifolium subterraneum L.) and were virtually absent (4.5%) from nodules of soil-grown white clover (Trifolium repens L.). In contrast (with the exception of one dilution [10]), serotype 1-01 occupied a substantial portion of nodules (16 to 40%) on white clover seedlings grown on mineral salts agar and exposed to samples of the same soil in the form of a 10-fold dilution series (10 to 10). Under the latter conditions, occupancy of subclover nodules by 1-01 and of nodules of both plant species by 2-02 was consistent with the results obtained with soil-grown plants.
三叶草根瘤菌本土血清型 1-01 和 2-02 在土壤中生长的三叶草（百脉根）根瘤中占据相似的比例（18%至 23%），而在土壤中生长的白三叶草（红车轴草）根瘤中几乎不存在（4.5%）。相比之下（除了一个稀释度[10]外），血清型 1-01 在矿物盐琼脂上生长的白三叶草幼苗的根瘤中占据了相当大的比例（16%至 40%），并暴露于以 10 倍稀释系列（10 至 10）的形式存在的相同土壤样本中。在后者的情况下，1-01 占据三叶草根瘤，2-02 占据两种植物的根瘤，这与在土壤中生长的植物的结果一致。
