Indole acetic acid and ACC deaminase-producing Rhizobium leguminosarum bv. trifolii SN10 promote rice growth, and in the process undergo colonization and chemotaxis - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Accéder directement au contenu
Article Dans Une Revue Biology and Fertility of Soils Année : 2012

Indole acetic acid and ACC deaminase-producing Rhizobium leguminosarum bv. trifolii SN10 promote rice growth, and in the process undergo colonization and chemotaxis

Résumé

This study focuses on the chemotaxis, colonization and rice growth promoting ability of indole acetic acid (IAA) and 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase-producing rhizobacteria Rhizobium leguminosarum bv. trifolii SN10, previously isolated from root nodules of Trifolium alexandrium L. We show here that R. leguminosarum bv. trifolii SN10 promote the growth of four different rice varieties grown in India in terms of biomass, root branching and N content. In addition, using scanning electron microscopy and viable cell counts, we provide evidence that the bacteria successfully colonize the root surface of the rice variety which showed maximum growth promotion upon inoculation. Not only this, R. leguminosarum bv. trifolii SN10 exhibit a strong chemotaxis response towards the rice seed and root exudates despite the presence of a bacteriostatic phenolic compound, 7-hydroxycoumarin (umbelliferone). Further, R. leguminosarum bv. trifolii SN10 secretion of phytohormones such as IAA and ACC deaminase suggest the potential of the plant growth promoting rhizobacteria to be used as biofertilizer to enhance rice crop production in the subcontinent.

Dates et versions

hal-02650338 , version 1 (29-05-2020)

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Citer

Rumpa Biswas Bhattacharjee, Philippe Jourand, Clémence Chaintreuil, Bernard Dreyfus, Aqbal Singh, et al.. Indole acetic acid and ACC deaminase-producing Rhizobium leguminosarum bv. trifolii SN10 promote rice growth, and in the process undergo colonization and chemotaxis. Biology and Fertility of Soils, 2012, 48 (2), pp.173 - 182. ⟨10.1007/s00374-011-0614-9⟩. ⟨hal-02650338⟩
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