Isolation and characterization of drought stress tolerant plant growth promoting rhizobacter from chilli crop

Devanathan J,Thiripurasundari T,Ramadass L,Selvaraj S,Ram Kumar A,Selvam K.A

doi:10.34256/bsr2111

Devanathan J, Thiripurasundari T + Show 4 more

Open Access

https://doi.org/10.34256/bsr2111

Copy DOI

Journal: Bulletin of Scientific Research	Publication Date: Dec 7, 2020
Citations: 3	License type: CC BY 4.0

Affiliation: American College, Madurai

Abstract

Plant growth promoting rhizobacter (PGPR) are adapted to adverse conditions and protect plants from the deleterious effects of some environmental stresses. The aim of the present study, the drought tolerant plants growth promoting bacteria (PGRB) were isolate and characterized from chilli crop (CapsicumannumL). From the rhizosphere soil twelve bacteria were isolated and characterized based on their biochemical and sugar fermentation. The drought stress tolarent stains were screened by production of exo polysaccharides and the plant growth promoting activities like production of IAA and PO4 solubilization were screened. Therefore the present study report that PGRB showed good stress tolerance under drought condition in chilli crop.

Highlights

Nowadays, Plants are constantly exposed to a wide range of biotic and abiotic stresses which limit plant productivity
Pseudomonas sp (18mm) showed highest zone of inhibition followed by Bacillus sp (17 mm) and least zone of inhibition was recorded by Enterobacter sp (01 mm) the results shown in the Fig 3
The Plant growth promoting rhizobacter (PGPR) activities were screened by production of Indole-3-acetic acid (IAA) and PO4 solubilization

Summary

Introduction

Plants are constantly exposed to a wide range of biotic and abiotic stresses which limit plant productivity. In world-wide Drought considered one of the most important multi dimensional stress inducing environmental factors that affect plant growth and yield, in arid and semiarid regions. One-third of the world land area is prone to drought stress which poses severe threat to plant growth and food security [3]. The recent failure in monsoon rain leaves 45% of the cropping area under drought (Indian Meteorological Department 2009). Drought negatively affects quantity and quality of growth in plants [4]. At the initial phase of plant growth and establishment, it negatively affects seed germination, stem elongation and expansion [5]. Reduced leaf growth and in turn the leaf areas caused a marked reduction in photosynthetic rate which subsequently decreased plant growth and yield [6].

Methods

Results

Conclusion