Characterization of halotolerant, pigmented, plant growth promoting bacteria of groundnut rhizosphere and its in-vitro evaluation of plant-microbe protocooperation to withstand salinity and metal stress

The Science of the Total Environment
Avishek BanikMaya Dangar

Abstract

The use of plant associated, indigenous beneficial microbes for sustainable agriculture is getting worldwide acceptance as they successfully colonize at different plant niche under stress conditions to enhance the crop productivity. They also generate several plant growth regulators and protect plants from adversity like presence of salts and metals. In the present study, indigenous, halotolerant, plant growth promoting (PGP) bacterial isolates were isolated from the saline rhizospheric soil of groundnut plants aiming to investigate its in-vitro metal remediation capabilities under saline stress condition. Two pigmented bacteria were selected based on their phenotypic, biochemical, physiological and PGP characters and identified as members of family Bacillaceae (Bacillus and Halobacillus) based on 16S rRNA gene sequence similarity. The pigments were extracted, tested for different antioxidant properties and identified by GC-MS and FT-IR spectra. Simultaneously, both strains exhibited a wide range of salinity (NaCl≥25%), metal resistance (Zinc≈1700mgkg-1, Aluminium≈1800mgkg-1, Lead≈1800mgkg-1), pH (6-10), PGP attributes (indole - 1.05-3.15μgml-1, ammonia - 0.13-19.95mmolml-1, nitrite - 0.07-0.26mmolml-1) and antibiotics sensitiv...Continue Reading

Citations

Jul 25, 2019·Environmental Science and Pollution Research International·Sivagnanam SilambarasanVelu Rajesh Kannan
May 6, 2020·International Journal of Environmental Research and Public Health·Tiejun WangHui Han
Sep 5, 2018·Current Microbiology·Roqayya MumtazMuhammad Ali
Feb 15, 2021·Physiologia Plantarum·Chandrashekharaiah Purushanahalli ShivagangaiahAvishek Banik
Sep 2, 2021·Saudi Journal of Biological Sciences·Sarwat SaleemMehboob Ahmad

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