• M Jayaprakashvel
• V Ramabhai

Rhizobacteria associated with the Coastal sand dune plants produce biologically active metabolites to adapt the stressed environment. Importantly the plant growth promoting metabolites produced under this nutrition limited ecosystem by certain rhizobacteria lead to the sustainability of the Coastal sand dune plants. In this study, rhizospehere soil samples of three predominant coastal sand dune plant species such as Ipomoea pes caprae, Canavalia rosea and Spinifex sp. were collected from five different locations along Chennai coastal area. A total of 105 pure culture of rhizobacteria were isolated and given the identification codes with a prefix of AMETB. They were characterized based on their colony color, shape, texture, size and the ability to exhibit the diffusible fluorescence pigments in King’s B medium. Among the 105 bacteria, 78 strains are Indole Acetic Acid (IAA) producers which were further studied for the quantification of IAA. Strains AMETB7008, AMETB7030, AMETB7041, AMETB7056 and AMETB7077 were found as effective producers of IAA, which produced 140.9µg/mL, 137.8µg/mL, 117.1µg/mL, 125.3µg/mL and 67.3µg/mL of IAA, respectively. By this study, it can be concluded that rhizospheric bacteria associated with Coastal sand dune plants in the East Coast of Tamil Nadu could produce phytohormone IAA which can be further developed as an effective plant growth promoter for agricultural applications in coastal saline soils.

Rhizobacteria, Coastal sand dune plants, phytohormone, salt stress, bioprospecting

"BIOPROSPECTING OF RHIZOSPHERIC BACTERIA ASSOCIATED WITH COASTAL SAND DUNE PLANTS FOR THE PRODUCTION OF PHYTOHORMONE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 8, page no.86-90, August-2018, Available :http://www.jetir.org/papers/JETIR1808308.pdf

"BIOPROSPECTING OF RHIZOSPHERIC BACTERIA ASSOCIATED WITH COASTAL SAND DUNE PLANTS FOR THE PRODUCTION OF PHYTOHORMONE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 8, page no. pp86-90, August-2018, Available at : http://www.jetir.org/papers/JETIR1808308.pdf