Record Details

Biofilm-associated indole acetic acid producing bacteria and their impact in the proliferation of biofilm mats in solar salterns

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title Biofilm-associated indole acetic acid producing bacteria and their impact in the proliferation of biofilm mats in solar salterns
 
Creator Kerkar, S.
Raiker, L.
Tiwari, A.
Mayilraj, S.
Dastager, S.
 
Subject bacteria
biofilm
 
Description Biofilm mats appear in salterns distinctively during the monsoon season when the salinity decreases below 12 percentile salinity units and within a short period cover the entire surface area of the saltern. A study was carried out in two salterns viz. Nerul and Curca to find a possible reason for the rapid proliferation of these solar biofilms. Out of the 125 bacteria isolated from these biofilms, 16 produced indole-3-acetic acid (IAA). Rapid in-situ assay with Salkowski reagent and HPLC analysis confirmed the IAA production. Four isolates consistently produced high IAA concentrations ranging from 9.5 to 14.2 mu g/mL in the presence of 4 mg/mL tryptophan concentrations in the growth media. The IAA-producing bacteria were Aeromonas aquariorum (N2), Pseudomonas alcaliphila (N3), Vibrio diazotrophicus (N6) and Pseudomonas pachastrellae (C3). These four IAA-producing bacteria also produced other growth promoting factors like ammonia. Three isolates produced siderophores and were phosphate solubilizers. There was enhancement in the growth of Cicer arietinum (length of the shoot and root) under axenic conditions and of biofilm mats (r = 0.9, p < 0.001; r = 0.8, p < 0.05 and r = 0.946, p < 0.01, respectively). This is, according to our knowledge, the first report indicating IAA-producing bacteria isolated from biofilms enhancing the proliferation of these biofilm mats in the solar salterns.
 
Date 2012-05-09T10:45:00Z
2012-05-09T10:45:00Z
2012
 
Type Journal Article
 
Identifier Biologia, vol.67(3); 2012; 454-460
http://drs.nio.org/drs/handle/2264/4051
 
Language en
 
Rights An edited version of this paper was published by Springer. This paper is for R & D purpose and Copyright [2011] Institute of Molecular Biology, Slovak Academy of Sciences.
 
Publisher Institute of Molecular Biology, Slovak Academy of Sciences