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Activation of a calcium - dependent protein kinase involved in the Azospirillum growth promotion in rice

Por: Ribaudo, Claudia Mónica. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Biología Aplicada y Alimentos. Cátedra de Bioquímica. Buenos Aires, Argentina.
Colaborador(es): Curá, José Alfredo. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Biología Aplicada y Alimentos. Cátedra de Bioquímica. Buenos Aires, Argentina | Cantore, María L. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Biología Aplicada y Alimentos. Cátedra de Bioquímica. Buenos Aires, Argentina.
ISSN: 1573-0972.Tipo de material: Artículos y capítulos. Recurso electrónico.Tema(s): AZOSPIRILLUM | RICE | CDPK | LATERAL ROOTS | GROWTH PROMOTION | Recursos en línea: Haga clic para acceso en línea | LINK AL EDITOR En: World Journal of Microbiology and Biotechnology Vol.33, no.22 (2017), 9 p., grafs., fot.Resumen: Rice seedlings (Oryza sativa) inoculated with the plant growth-promoting rhizobacteria Azospirillum brasilense FT326 showed an enhanced development of the root system 3 days after inoculation. Later on, a remarkable enlargement of shoots was also evident. An increase in the Ca2 plus sign dependent histone kinase activity was also detected as a result of inoculation. The biochemical characterization and Western blot analysis of the kinase strongly supports the hypothesis that it belongs to a member of the rice CDPK family. The fact that the amount of the protein did not change upon inoculation seems to indicate that a posttranslational activation is responsible for the change in the enzymatic activity. An in-gel kinase experiment identified a 46 kDa CDPK like protein kinase as a putative component of the signal transduction pathway triggered by Azospirillum inoculation. To our knowledge, this is the first report on the possible involvement of a Ca2 plus sign dependent protein kinase in promotion of rice plants growth by A. brasilense.
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Rice seedlings (Oryza sativa) inoculated with the plant growth-promoting rhizobacteria Azospirillum brasilense FT326 showed an enhanced development of the root system 3 days after inoculation. Later on, a remarkable enlargement of shoots was also evident.
An increase in the Ca2 plus sign dependent histone kinase activity was also detected as a result of inoculation.
The biochemical characterization and Western blot analysis of the kinase strongly supports the hypothesis that it belongs to a member of the rice CDPK family.
The fact that the amount of the protein did not change upon inoculation seems to indicate that a posttranslational activation is responsible for the change in the enzymatic activity. An in-gel kinase experiment identified a 46 kDa CDPK like protein kinase as a putative component of the signal transduction pathway triggered by Azospirillum inoculation.
To our knowledge, this is the first report on the possible involvement of a Ca2 plus sign dependent protein kinase in promotion of rice plants growth by A. brasilense.

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