Title: Competition between effective and ineffective bradyrhizobia nodulating peanuts (<i>Arachis hypogaea</i>)<sup>1</sup>
Abstract: SUMMARY The competitive ability of effective and ineffective isolates of Bradyrhizobium to form nodules on four peanut ( Arachis hypogaea ) genotypes from which they were originally isolated was investigated in a greenhouse study. Pregerminated seeds of each genotype were inoculated with five ratios of ineffective effective bradyrhizobia: 10 4 :0, 10 4 :10 2 10 4 :10 4 10 2 :10 4 and 0:10 4 . Plants were harvested 35 days after planting and nitrogenase activity, total nodule number per plant, plant shoot dry weight and the proportion of nodules formed by each Bradyrhizobium isolate were determined. Nodulation suppression occurred on plants inoculated with the mixed cultures, especially on those inoculated with the 10 4 :10 2 ineffective effective inoculum ratio. More than 85% of the nodules on plants inoculated with the 10 4 :10 4 and 10 2 :10 4 ineffective effective Bradyrhizobium mixtures were formed by the effective isolates. The number of effective nodules per plant, nitrogenase activity and plant shoot dry matter production all increased with the proportion of the effective bradyrhizobia in the inocula.
Publication Year: 1987
Publication Date: 1987-12-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 1
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