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Quorum sensing in bacteria of rice rhizospheres from Chhattisgarh, India



Pankaj Kumar, Shivali Sharma & Vibhay Nath Tripathi*



Department of Botany, Guru Ghasidas University, Bilaspur, India 495009; *Corresponding author



Vibhay Nath Tripathi - Email: vibhay.tripathi@ggu.ac.in; Phone: +91 7587879195

Pankaj Kumar E-mail: pnkb92@gmail.com; Shivali Sharma E-mail: shivalibsp@gmail.com 


Article Type

Research Article


Received February 1, 2023; Revised February 28, 2023; Accepted February 28, 2023, Published February 28, 2023



Quorum sensing is a phenomena used by bacteria for regulation of some important characteristics coordinately. Gram-negative and Gram-positive bacteria, both utilize this system of communication, but they use different signal molecules for this, i.e. Gram-negative bacteria preferentially use acyl homoserine lactone (AHL). Rhizospheric soil is rich in bacterial diversity, with the presence of both types of bacteria. It will be useful if we know the quorum sensing based communications among bacteria present in rhizospheric soil. This work was undertaken with the idea to explore the diversity of AHL producing bacteria in soil. For this, bacteria were isolated from rice rhizosphere from field located in Dhamtari district of Chhattisgarh. To study quorum sensing, detection of AHL production was performed by colorimetry method. Out of total 29 bacterial isolates, only three Gram-negative bacteria showed positive result for AHLs production. These 3 isolates were selected for further study. The isolates were characterized by biochemical test. Other characteristics of these bacteria were also tested, like antibiotic resistance profile, indole test, and capability to biofilm formation, phosphate solubilization as well as their growth in different specific culture media. The Results suggest that AHLs producing bacteria may belong to family of Pseudomonas sp., which are reported in different researches to be part of the PGPR group of organisms. This work forms the base to study the cell-cell communication in plant rhizospheres. 



Quorum sensing, bacteria, rice rhizospheres



      Kumar et al. Bioinformation 19(2): 199-205 (2023)


Edited by

P Kangueane






Biomedical Informatics



This is an Open Access article which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. This is distributed under the terms of the Creative Commons Attribution License.