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Metabolism of indole acetic acid in root nodules of Dolichos biflorus Linn



Metabolism of indole acetic acid in root nodules of Dolichos biflorus Linn



Indian Journal of Experimental Biology 36(2): 192-194



Root nodules of D. biflorus, a leguminous medicinal herb, contained high amount of IAA. A tryptophan pool present in the nodule, might serve as a source of IAA production. Presence of IAA metabolising enzymes, IAA oxidase and peroxidase, indicated metabolism of IAA, at least in part, in nodules. The symbiont from the nodules, a Rhizobium sp., produced high amount of IAA in tryptophan supplemented culture medium. For IAA production, the bacteria preferred L-isomer over DL-isomer, whereas D-isomer of tryptophan was not utilized. The possible role of this IAA production in legume, Rhizobium symbiosis is discussed.

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Accession: 003199519

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