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- W4308995715 abstract "Abstract Secretion of quorum sensing (QS) molecules is important for the effective colonization of host plants by plant growth-promoting rhizobacteria. The current study aims at the isolation and characterization of tea rhizosphere bacteria, which produce the QS molecules, acyl homoserine lactone (AHLs), along with multiple plant growth-promoting (PGP) activities. Thirty-one strains were isolated from the tea rhizosphere, and screening for PGP activities resulted in the selection of strains RTE1 and RTE4 with multiple PGP traits, inhibiting the growth of tea fungal pathogens. Both strains also showed production of AHL molecules while screened using two biosensor strains, Chromobacterium violaceum CV026 and Escherichia coli MT 102(jb132). The strains identified as Burkholderia cepacia RTE1 and Pseudomonas aeruginosa RTE4 based on genome-based analysis like phylogeny, dDDH, and fastANI calculation. Detailed characterization of AHLs produced by the strains using reverse-phase TLC, fluorometry, and LC-MS indicated that the strain RTE1 produced a short chain, C8, and a long chain C12 AHL, while RTE4 produced short-chain AHLS C4 and C6. Confocal microscopy revealed the formation of thick biofilm by RTE1 and RTE4 (18 µm and 23 µm, respectively). Additionally, we found several genes involved in QS, and PGP, inducing systemic resistance (ISR) activities such as lasI/R , qscR , pqq , pvd , aldH , acdS , phz , Sod , rml , and Pch , and biosynthetic gene clusters like N -acyl homoserine lactone synthase, terpenes, pyochelin, and pyocyanin. Based on the functional traits like PGP, biofilm formation and production of AHL molecules, and genetic potential of the strains B. cepacia RTE1 and P. aeruginosa RTE4 appear promising candidates to improve the health and growth of tea plantations." @default.
- W4308995715 created "2022-11-20" @default.
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- W4308995715 date "2022-11-14" @default.
- W4308995715 modified "2023-10-14" @default.
- W4308995715 title "Quorum sensing activities and genomic insights of plant growth-promoting rhizobacteria isolated from Assam tea" @default.
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- W4308995715 doi "https://doi.org/10.21203/rs.3.rs-2256499/v1" @default.
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