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VOL. 6, ISSUE 4 (2021)
Functional characterization of exopolysaccharide and IAA producing bacterial strains of Bacillus Cereus for alleviating salt stress in spinach
Authors
Sangram Sinha
Abstract
Increasing soil salinity has been a serious problem over the globe and it is a potential barrier to food security. In India, a vast land around 6.74 million ha has been affected by salinity and it has been predicted that around 50% of the arable land will be sodic by the year 2050. Envisioning the national urgency and global microbiological intervention in salinity management, the present study has been conducted to assess the efficacy of exopolysaccharide (EPS) and IAA producing plant growth promoting rhizobacteria (PGPR) in alleviating salt stress in spinach. Two bacterial strains SP6 and SP8 originally isolated from potato rhizosphere were found to produce IAA and also exhibited salt induced EPS production. Biochemical and 16SrRNA gene analysis revealed that both the strains belong to Bacillus cereus. The strains when used as rhizoinoculant in Spinach, they have shown positive response towards minimising salt stress in spinach. The strain SP8, however, was more effective compared to the strain SP6. Furthermore, in addition to growth promotion in spinach under saline stress condition, they also protected the plant from salt stress injury by synthesising proline and preventing membrane damage as marked by decrease in malondialdehyde (MDA) content. Therefore, the study concluded that EPS and IAA producing PGPR strain Bacillus cereus SP8 may be exploited for restoring crop productivity in salinity affected agricultural fields.
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Pages:807-814
How to cite this article:
Sangram Sinha "Functional characterization of exopolysaccharide and IAA producing bacterial strains of <em>Bacillus</em> <em>Cereus</em> for alleviating salt stress in spinach ". International Journal of Botany Studies, Vol 6, Issue 4, 2021, Pages 807-814
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