首页|Rhizobia Enhance Growth in Rice Plants Under Flooding Conditions
Rhizobia Enhance Growth in Rice Plants Under Flooding Conditions
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In lowland areas rhizobia can fix nitrogen in legume association and colonize the rice plants in rotation. Recent studies have shown that rhizobia can promote plant growth by colonizing rice roots, stems and leaves. The production of phytohormones, mainly indole acetic acid (IAA) is possibly the main mechanism of growth promotion of rice by rhizobia. The objectives of this study were to check the responsiveness of different rice cultivars to inoculate with rhizobia; to study the colonization patternof rice plants by rhizobia and legumes; and to genetically evaluate the biosynthesis of auxin by rhizobia. Several experiments were conducted in the greenhouse and in the laboratory with rice plants inoculated with different rhizobia. The rice cultivarstested IRGA424 proved to be more responsive to inoculation with rhizobia. Rhizobial strains marked with the gusA gene confirmed the colonization of rice. The rhizobia tested are able to produce IAA and there is evidence that the biosynthesis occurs by the route of indole-3- acetonitrile (IAN).
Enilson L. S. de Sd、Adriana Giongo、Benjamin Dias Osdrio Filho、Kelsey A. Gano、Andreia Binz、Rafael F. Lima、Lourdes Martinez Aguilar、Augusto Ramirez、Jesus Caballero-Mellado
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Universidade Federal Do Rio Grande Do Sul, Porto Alegre, RS, Brazil
University of Florida, Gainesville, FL, USA
Universidade Estadual Do Rio Grande Do Sul, Cachoeira Do Sul, RS, Brazil
Universidad Nacional Autonoma De Mexico, Cuernavaca, Mexico
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