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Title: Spatial distribution and identification of bacteria in stressed environments capable to weather potassium aluminosilicate mineral
Authors: Rajwat, Mahendra Vikram Singh
Singh, Rajni
Singh, Devendra
Yadav, Ajar Nath
Singh, Surender
Kumar, Murugan
Saxena, Anil Kumar
Keywords: Silicate mineral weathering bacteria (SWB) . Weathering potential . Phylogenetic tree . Stressed environments . Distribution
Issue Date: 2020
Publisher: Brazilian Journal of Microbiology
Abstract: In the present study, we studied the distribution of silicate mineral weathering bacteria (SWB) in stressed environments that release potassium from insoluble source of mineral. Out of 972 isolates, 340 isolates were positive and mineral weathering potential ranged from 5.55 to 180.05%. Maximum abundance of SWB occurred 44.71% in saline environment followed by 23.53% in low temperature and 12.35% each in high temperature and moisture deficit. Among isolates, silicate mineral weathering efficiency ranged from 1.9 to 72.8 μg mL−1 available K in liquid medium. The phylogenetic tree of SWB discriminated in three clusters viz. Firmicutes, Proteobacteria and Actinobacteria. This is the first report on SWB in stressed environments and identified 27 genera and 67 species which is not reported earlier. Among them Bacillus was the predominant genera (58.60%) distantly followed by Pseudomonas (6.37%), Staphylococcus (5.10%) and Paenibacillus (4.46%). These bacterial strains could be developed as inoculants for biological replenishment of K in stressed soils.
Appears in Collections:School of Interdisciplinary & Applied Sciences

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