Biocontrol Potentials Of Bacteriocin- Producing Bacteria From Tumeric Plants Rhizosphere:-Nwachukwu, Igwe D

ABSTRACT

The biocontrol potentials of Bacteriocin Producing Rhizospheric Bacteria Isolates of Tumeric Plants was Studied. Rhizosperic Soil of the Tumeric Plant were analyzed for bacteria flora, ability to produce bacteriocin. The Antibacteria Activity of the isolates and the antifungal activity of crude bacteriocin extract against known fungi pathogen of plants including Fusarium, collectortridium. phytophtora and Aspergillus. Results obtained shows that bacteria flora carried many bacteria species including . lactobacillus. Pseudomonas, and Bacillus species including B subtillis, B pumulis, B aeruginosa and B linchinformis with varying level of prevalence .ranging from 60°/o(Bacillus linchifbrmis) to 100% (P. aeruginosa and B. subtillis). The antibacterial activity of the isolates against some pathogenic bacterial activity with the inhibition zones with diameter ranging from 9.33mm (pseudomonas) to 12.33mm (B subtilis). The in vitro control of fungi pathogen test show inhibitions of the pathogen in the range of 0.00 (Pseudomonas') to 12.13mm (bacillus) against fusarium and from 6.33mm (Pseudomonas) to 14.67mm(B subtillis) against collectotridium. Phytophtora was inhibited to the tune of 0.00mm (pseudomonas) to 14.6mm (lactobacillus) and lowest (6.33mm) with Pseudomonas Aeruginosa. The relative potency of the extracts of the isolate extract (cell free supernatant) showed that the organism preferred lower than the standard antifungal drug (mancozede) with variation between the action on the different fungi pathogen.