Morphological and Genetic Diversity of Rhizobia Nodulating Cowpea (Vigna unguiculata L.) from Agricultural Soils of Lower Eastern Kenya

Figure 2

Colonies of rhizobia isolates on yeast mannitol agar medium containing bromothymol blue. (a) Yellow with creamy and smooth margins, medium sized, round, (b) cream with smooth margin, medium sized, round, (c) yellowish, smooth margins, medium sized, round (d) yellow, smooth margins, small sized, punctiform, (e) white, smooth margins, medium sized, round (f) white, smooth margins, small sized, punctiform.

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