Efficacy of Plant Growth Promoting Rhizo Bacteria Containing Acc-Deaminase Activity for Enhancing Growth of Maize ( Zea Mays L) under Salt-Stressed Conditions

Abstract

Salinity is one of the most brutal environmental factors limiting the productivity of crop plants because most of the crop plants are sensitive to salinity caused by high concentrations of salts in the soil, and the area of land affected by it is increasing day by day. Salinity is one of the major anthropogenic as well as environmental stresses that reduce plant growth. Maize is a plant known for food, feed, and energy value, but being a greater biomass, it may also be utilized to extract pollutants from soil. Plant growth-promoting rhizobacteria (PGPR) may act as bio fertilizer to improve plant health. Some rhizobacteria are beneficial to plants and affect plant growth positively through different mechanisms of action. Ethylene, a plant hormone, also known as a stress hormone, is released by the plant as a physiological response when exposed to a variety of different stresses including both edaphic and adaphic. Growth of maize plants behaves better under saline environment as inoculated with different rhizobial strain showing ACC Deaminaze activity due to the production of ethylene under stressed conditions. Reduction in sodium uptake by the utilization of different rhizobial strains under saline environment is a positive sign to induce salt tolerance biologically.