1. Inoculation of ACC Deaminase-Producing Brevibacterium linens RS16 Enhances Tolerance against Combined UV-B Radiation and Heat Stresses in Rice (Oryza sativa L.)
- Author
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Tongmin Sa, Jeongyun Choi, Aritra Roy Choudhury, Myung-Min Oh, and Song-Yi Park
- Subjects
Ethylene ,Geography, Planning and Development ,Brevibacterium linens RS16 ,Biomass ,TJ807-830 ,Management, Monitoring, Policy and Law ,Photosynthesis ,TD194-195 ,UV-B radiation ,Renewable energy sources ,heat stress ,chemistry.chemical_compound ,ethylene ,GE1-350 ,Microbial inoculant ,Oryza sativa ,biology ,Environmental effects of industries and plants ,Renewable Energy, Sustainability and the Environment ,Inoculation ,food and beverages ,Brevibacterium ,biology.organism_classification ,ACC deaminase ,Environmental sciences ,Horticulture ,chemistry ,DNA damage ,Bacteria - Abstract
UV-B radiation and high temperature have detrimental effects on plant physiological and biochemical processes. The use of bacterial inoculants for stress alleviation has been regarded as a sustainable and eco-friendly approach. Hence, this study was conducted to evaluate the ability of 1-aminocyclopropane-1-caboxylate (ACC) deaminase-producing Brevibacterium linens RS16 in enhancing stress tolerance in rice against combined UV-B radiation and heat stresses. A combination of 0.5 Wm−2 UV-B radiation and 40 °C of temperature were imposed on rice plants for 5 days. The plants imposed with combined stress had shown significantly higher ethylene emissions compared to the plants grown under normal conditions. In addition, the stress imposition had shown negative effects on the photosynthetic traits, biomass, and genetic material of rice plants. The inoculation of bacteria had shown a 26.5% and 31.8% decrease in ethylene emissions at 3 and 4 days of stress imposition compared to the non-inoculated plants. Additionally, bacterial inoculation had also enhanced plant biomass and photosynthetic traits, and had proved to be effective in restricting DNA damage under stress conditions. Taken together, the current study has shown the effective strategy of enhancing stress tolerance against the interactive effects of UV-B radiation and heat stresses by regulation of ethylene emissions through inoculating ACC deaminase-producing bacteria.
- Published
- 2021