Evaluation of Drought Stress Management using ACC Deaminase Producing Plant Growth Promoting Rhizobacteria

By : Raja A , Prabakaran P , Ezhilarasu A , Ammu D

Page No: 335-341

Abstract :
The application of plant growth promoting rhizobacteria (PGPR) in agro-ecosystems is considered to have the potential for improving plant growth under drought tolerance. In the present study four different bacteria were isolated from paddy field. The isolates were identified as Pseudomonas fluorescens, Enterobacter sp, Bacillus subtilis and Rhizobium sp. All the four isolates were initially selected for their ability to produce IAA, phosphate solublization, siderophore production and ACC deaminase. Among them, Rhizobium sp and Pseudomonas sp were found to be potent isolates capable to produce siderophore, Acc deaminase and tolerate drought induced by PEG. Rhizobium sp showed the highest level of ACC deaminase and could efficiently enhance the root and shoot growth ratio followed by Pseudomonas fluorescens. The results of bacterial treatment were significant at p < .05 and not significant in control. These results suggest drought tolerant Pseudomonas sp and Rhizobium sp from V. radiatae could enhance plant growth under drought stress conditions and serve as effective bioinoculants to sustain agricultural production in arid regions.

Authors :
Raja A : Department of Microbiology, Dhanalakshmi Srinivasan College of Arts and Science for Women (Autonomous), Perambalur, Tamilnadu, India
Prabakaran P : Department of Microbiology, Selvamm Arts and Science College (Autonomous), Namakkal
Ezhilarasu A : Department of Microbiology, Selvamm Arts and Science College (Autonomous), Namakkal
Ammu D : Department of Microbiology, Selvamm Arts and Science College (Autonomous), Namakkal

DOI: https://doi.org/10.32381/JPSR.2020.36.1-2.43