A Study on the Biopotentials of Bacterial Strains Isolated from Paddy Rhizosphere

ISSN: 0973-7510

E-ISSN: 2581-690X

B. Sivasankari, Thilagavathy Daniel and C. Sobana

Department of Biology, Gandhigram Rural Institute, Deemed-University, Gandhigram, India.

J Pure Appl Microbiol. 2011;5(1):413-416

Received: 11/06/2010 | Accepted: 02/08/2010 | Published: 30/04/2011

Abstract

Three bacterial strains Bacillus sp, Proteus sp, and Pseudomonas sp isolated from paddy rhizosphere soil were screened for IAA production. All the three bacterial isolates were able to produce IAA. These isolates were also tested for IAA production at different pH and in different time intervals. Pseudomonas sp was able to produce higher amount of IAA at pH 7(12.81µg/ml) and on 7 d (12.78µg/ml). The bioassay result reveals that the crude IAA extract from Pseudomonas sp can promoted the germination percent (90),vigour index (495) shoot (3.8cm) and root length (10.0cm)in paddy, Oryza sativa in T9 on 7^th day compared to other treatments and in control.

Keywords

Rhizosphere, Bacterial isolates, IAA

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