Dinitrogen Fixation of Rice-Klebsiella Associations
1986
Yoo, I. D. | Fujii, T. | Sano, Y. | Komagata, K. | Yoneyama, T. | Iyama, S. | Hirota, Y.
We report N₂ fixation by Klebsiella oxytoca strain NG13, isolated from the rhizosphere of a rice (Oryza sativa L.) plant, in association with Indica type rice strain, C5444. The C₂H₂-reducation assays, biomass measurements, N content determinations, and ¹⁵N isotopic dilution assays indicated that inoculation of C5444 with NG13 resulted in a 6% increase of total plant+soil N content, and a 19% ¹⁵N isotopic dilution of plant N after 120 days of cultivation. Our results demonstrated significant levels of N₂ fixation by K. oxytoca when associated with rice. By optimizing such rice plant-bacterial N₂ fixation capacity, the N uptake by rice could be enhance.
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