Abstract
Speroplasts of Rhizobium japonicum strains 61A76, USDA 31, and 110 were prepared by culturing cells in the presence of glycine, followed by treatment with lysozyme. The cells were examined by scanning electron microscopy before, during, and after becoming spheroplasts and found to be morphologically similar to the bacteroid forms found in soybean root nodules. Some similarities of spheroplast and bacteroid formation are discussed.
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