Cell water content and lignification in maize regulated by rhizobacteria under salinity

Yachana Jha

Abstract
Inoculation of plant growth promoting rhizobacteria (PGPR) Pseudomonas aeruginosa and Bacillus megaterium in maize plant under salinity stress was analyzed for its growth promotion efficacy and induction of physiological mechanism. In this study effect of these isolates were focused on the cellular level as with lignin deposition, cell wall lignin content and cell water status of maize under salinity. Maize plants get protected from the salinity induced injury by enhancing the plant growth, regulating relative water content, enhancing phenols, flavonoids as well as lignification of cell and antioxidant enzymes also. The study states that, PGPR helps in maize plant under salinity to increase the cell membrane stability, plays a significant action in the directive of cell permeability for the survival of plants. Nevertheless, the cell wall bounded peroxidase and phenylalanine ammonia-lyase (PAL) activity reduced with gradual increase soil in non-inoculated plants. So plants inoculated with selected root-associated bacteria has a positive response on cell content and water status in maize under salinity.

Keywords
Maize; Lignin; Cell membrane stability; Phenols; Flavonoids; Phenylalanine ammonia-lyase; Salinity.

DOI
10.21472/bjbs.040702

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References
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