title: A novel Azotobacter vinellandii (SRIAz3) functions in salinity stress tolerance in rice.
abstract: The plant growth promoting rhizobacteria (PGPRs) as a biofertilizer provide agricultural benefits to advance various crops productivity. Recently, we discovered a novel Azotobacter vinellandii (SRIAz3) from rice rhizosphere, which is well competent to improve rice productivity. In this study, we investigated a role of A. vinellandii to confer salinity tolerance in rice (var. IR64). A. vinellandii inoculated rice plants showed higher proline and malondialdehyde content under 200 mM NaCl stress as compared with uninoculated one. The endogenous level of plant hormones viz., indole-3 acetic acid (IAA), gibberellins (GA3), zeatint (Zt) was higher in A. vinellandii inoculated plants under high salinity. The fresh biomass of root and shoot were relatively elevated in A. vinellandii inoculated rice. Further, the macronutrient profile was superior in A. vinellandii inoculated plants under salinity as compared with non-inoculated plants. The present findings further suggest that A. vinellandii, a potent biofertilzer, potentially confer salinity stress tolerance in rice via sustaining growth and improving compatible solutes and nutrients profile and thereby crop improvement.
authors.affiliation: a Plant Molecular Biology Group; International Centre for Genetic Engineering and Biotechnology; New Delhi, India.
authors.forename: Ranjan Kumar
authors.initials: RK
authors.lastname: Sahoo
authors.forename: Mohammad Wahid
authors.initials: MW
authors.lastname: Ansari
authors.forename: Madhusmita
authors.initials: M
authors.lastname: Pradhan
authors.forename: Tushar K
authors.initials: TK
authors.lastname: Dangar
authors.forename: Santanu
authors.initials: S
authors.lastname: Mohanty
authors.forename: Narendra
authors.initials: N
authors.lastname: Tuteja
mesh_terms: D001395:Azotobacter; D018533:Biomass; D060026:Endophytes; D005308:Fertilizers; D005875:Gibberellins / Q000378:metabolism; D007210:Indoleacetic Acids / Q000378:metabolism; D012275:Oryza / Q000254:growth & development / Q000378:metabolism / Q000382:microbiology*; D018384:Oxidative Stress; D010788:Photosynthesis; D010937:Plant Growth Regulators / Q000378:metabolism*; D018517:Plant Roots / Q000254:growth & development / Q000382:microbiology; D018520:Plant Shoots / Q000254:growth & development; D054712:Salinity; D055049:Salt Tolerance; D036226:Seedlings; D012965:Sodium Chloride / Q000378:metabolism*; D013312:Stress, Physiological; D013559:Symbiosis
chemical_list: D005308:Fertilizers; D005875:Gibberellins; D007210:Indoleacetic Acids; D010937:Plant Growth Regulators; D012965:Sodium Chloride; C030737:indoleacetic acid
keywords: Azotobacter vinellandii; plant tolerance; rice; root and shoot biomass; salinity-stress