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Symbiotic efficiency of Hup+, Huphr and Hup- strains of Bradyrhizobium japonicum and Bradyrhizobium elkanii in cowpea cultivars

Symbiotic efficiency of Hup+, Huphr and Hup- strains of Bradyrhizobium japonicum and Bradyrhizobium elkanii in cowpea cultivars

Pesquisa Agropecuaria Brasileira 34(10): 1925-1931

Cowpeas (Vigna unguiculata) IPA-202, BR-3 and VITA-4 were seed inoculated with B. japonicum strains SR or USDA-110 (showing hydrogenase activity, Hup+), B. elkanii strain 29W (Hup-) or B. elkanii strain SEMIA-587 (host-regulated hydrogenase activity, Huphr). VITA-4 showed best nodulation, with efficient interaction with SEMIA-587 and USDA-110. Nitrogen fixation was most efficient in IPA-202 inoculated with SEMIA-587.

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