PHB And Its Role In Salt Acclimatization In Halotolerant Azotobacter Salinestris Species

Poly β-hydroxybutyrate (PHB) are important storage compounds of carbon and energy. Bacteria usually produce PHB apparently in response to the limitation of an essential nutrient and conditions of physiological stress. Therefore, it is assumed that the function of PHB is to serve as an available carbon repository when bacteria face carbon limitation, supporting their survival. Recent findings indicate that PHB plays a protective role against stress-like conditions such as thermal and oxidative shock. The objective of the review is to look at the role of PHB in the salt acclimation process. Salinity is considered to be the most serious abiotic stress affecting crop productivity. It is an active process, spreading globally and a reason for land degradation. Several strategies have been assumed to be used in order to deal with soil salinity. Salt tolerant plant growth promoting rhizobacteria (ST- PGPR) used as a biofertilizer has known to increase the crop yield under stressed condition. Azotobacter salinestris species is known to tolerate 8% salt concentration and can be studied as a model organism to understand the role of PHB in salt acclimatization. Thus, a sustainable approach under saline condition.