Screening and characterisation of plant growth promoting rhizobacteria isolated from turmeric plant (Curcuma longa L.) in Vietnam

Abstract

From rhizosphere soils of turmeric plant (Curcuma longa L.) collected in Hungyen province (Vietnam), nine inorganic phosphate solubilising bacterial strains were isolated. Among them, PGP-V5, PGP-V20, and PGP-V21 were identified as potent IAA producing strains with the amount ranging from 63.11 to 73.87 ppm. The strains were morphologically, physiochemically and molecular-biologically determined as Bacillus sp. PGP-V5, Enterobacter sp. PGP-V20, and Bacillus sp. PGP-V21. The strain Bacillus sp. PGP-V21 exhibited antifungal activities against fungal strains of Aspergillus niger and Fusarium oxysporum in a plate-based test. The results showed that the selected microbial strains can be used for preparing effective biofertilisers not only for C. longa but also for other crops in the Red River Delta.