RESPONSE OF DROUGHT TOLERANT BACTERIA TO PHYSIOLOGICAL FACTORS

Abstract

Drought is an unpleasant environmental stress condition that involves the absence of water due to lack of rainfall. This results in lack of nutrient uptake by the plant and also imbalance of hormone in plant. Some microorganisms are involved in the aid of plant growth and the prevention of disease, these are known as the Plant Growth Promoting Bacteria (PGPR) example of such are Pseudomonas fluorescens. Various droughts affecting plants include Agricultural, Meteorological, Hydrological and Socio-economic. Drought can be caused by different factors such as temperature increase, timing could also have an adverse effect due to difference between the time of planting and the time of rainfall. Plant Growth Promoting Bacteria can also help plants grow in abiotic stress such as drought, salinity. heavy metal, and temperature. These microorganisms secrete an enzyme called 1-aminocyclopropane-1-carboxylate (ACC) deaminase which through breaking down plant ACC, and also increases plant nutrient absorption.