Peribacillus frigoritolerans T7-IITJ, a potential biofertilizer, induces plant growth-promoting genes of Arabidopsis thaliana

This study aimed to isolate plant growth and drought tolerance-promoting bacteria from the nutrient-poor rhizosphere soil of Thar desert plants and unravel their molecular mechanisms of plant growth promotion. Among our rhizobacterial isolates, Enterobacter cloacae C1P-IITJ, Kalamiella piersonii J4-...

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Published in:Journal of applied microbiology 2024-04, Vol.135 (4)
Main Authors: Marik, Debankona, Sharma, Pinki, Chauhan, Nar Singh, Jangir, Neelam, Shekhawat, Rajveer Singh, Verma, Devanshu, Mukherjee, Manasi, Abiala, Moses, Roy, Chandan, Yadav, Pankaj, Sadhukhan, Ayan
Format: Article
Language:English
Subjects:
Arabidopsis - genetics
Arabidopsis - metabolism
Bacillus
Bacteria
Droughts
Genes, Plant
Indoleacetic Acids - metabolism
Iron - metabolism
Phosphates - metabolism
Plant Roots - microbiology
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Summary:This study aimed to isolate plant growth and drought tolerance-promoting bacteria from the nutrient-poor rhizosphere soil of Thar desert plants and unravel their molecular mechanisms of plant growth promotion. Among our rhizobacterial isolates, Enterobacter cloacae C1P-IITJ, Kalamiella piersonii J4-IITJ, and Peribacillus frigoritolerans T7-IITJ, significantly enhanced root and shoot growth (4-5-fold) in Arabidopsis thaliana under PEG-induced drought stress. Whole genome sequencing and biochemical analyses of the non-pathogenic bacterium T7-IITJ revealed its plant growth-promoting traits, viz., solubilization of phosphate (40-73 µg/ml), iron (24 ± 0.58 mm halo on chrome azurol S media), and nitrate (1.58 ± 0.01 µg/ml nitrite), along with production of exopolysaccharides (125 ± 20 µg/ml) and auxin-like compounds (42.6 ± 0.05 µg/ml). Transcriptome analysis of A. thaliana inoculated with T7-IITJ and exposure to drought revealed the induction of 445 plant genes (log2fold-change > 1, FDR 
ISSN:1365-2672
1365-2672
DOI:10.1093/jambio/lxae066