ACC Deaminase-Producing Bacteria: A Key Player in Alleviating Abiotic Stresses in Plants
Plants are subjected to many abiotic stresses in the environment. These abiotic stresses may be aggravated in the coming future due to global climate change. Almost all the environmental stress causes the production of ethylene in plants, which is detrimental to plant survival. Therefore, managing ethylene generation in plants is becoming as an attractive strategy to increase crop yields. 1-Aminocyclopropane-1-carboxylic acid is a precursor for production of ethylene in plants. The plant growth-promoting rhizobacteria that possess 1-aminocyclopropane-1-carboxylic acid deaminase activity are known to modulate plant growth under extreme environmental conditions by lowering ethylene concentrations in plants; hence, they can be termed as ‘stress modulator’. Ethylene is also known to reduce the nodule formation in various legumes prevailing under abiotic stress. 1-Aminocyclopropane-1-carboxylic acid deaminase-producing rhizobial strains can intensively promote nodulation in legumes under stress conditions. Another approach for combating abiotic stress in plants is through the incorporation of acdS gene from bacteria to crop plants. The recent molecular biology tools (metagenomics, transcriptomics, proteomics and next-generation sequencing) have been implied to reveal the diversity and application of potential 1-aminocyclopropane-1-carboxylic acid deaminase-producing plant growth-promoting rhizobacteria under various environmental conditions. These rhizobacteria have shown a vital interplay in conferring resistance and adaptation of plants to various abiotic stresses and have immense potential in organic farming and sustainable agriculture.
KeywordsPGPR ACC deaminase Abiotic stress Ethylene
The present work was funded by the Science and Engineering Research Board (Grant # SB/FT/LS-374/2012), received by IGM.
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