Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 29, Issue 16, Pages 22843-22859Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-022-18745-7
Keywords
ACC deaminase; Abiotic stresses; alpha-Ketobutyrate; Ammonia; Ethylene; Plant growth-promoting bacteria; Reactive oxygen species
Categories
Funding
- Gujarat Environmental Management Institute (GEMI)
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Plants face various biotic and abiotic stresses, and increased ethylene synthesis can inhibit plant growth and development and even cause plant death. Plant growth-promoting bacteria with ACC deaminase activity play a critical role in managing these stresses.
Plants are immobile and are exposed to various biotic and abiotic stresses, including heat, cold, drought, flooding, nutrient deficiency, heavy metal exposure, phytopathogens, and pest attacks. The stressors significantly affect agricultural productivity when exceed a certain threshold. It has been reported that most of the stressed plants are reported to have increased ethylene synthesis from its precursor 1-aminocyclopropane-1-carboxylic acid (ACC). Ethylene is a plant hormone that plays a vital role in the regulation of various physiological processes, such as respiration, nitrogen fixation, and photosynthesis. The increment in the plant hormone ethylene would reduce plant growth and development, and if the ethylene level increased beyond the limit, it could also result in plant death. Therefore, plant growth-promoting bacteria (PGPB) possessing ACC deaminase activity play an essential role in the management of biotic and abiotic stresses by hydrolysing 1-aminocyclopropane-1 -carboxylic acid using ACC deaminase. In this review, the importance of ACC deaminase-producing bacteria in promoting plant growth under various abiotic stressors is discussed.
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