Abstract
In this study, the biological characteristics and anti-fungal pathogen activities of the Streptomyces VNUA27 were studied to produce the bioproduct used for preventing fungal pathogens in bananas. The fungal pathogens used in this study were isolated from banana-affected wilts, and the antifungal activities of the actinomycetes were assessed using the co-culture and agar well diffusion methods. The results showed that Streptomyces VNUA27 exhibited a broad-spectrum antifungal activity with an inhibition rate of 71.89±3.86%, 60.00±1.24, and 55.38±3.39% against C. musa, C. gloeosporioides,andA. alternata, respectively. Additionally, this research demonstrated that VNUA27 could produce siderophore, extracellular enzymes (cellulase, chitinase, xylanase, pectinase and protease), phosphate solubilisation, and IAA production. Streptomyces VNUA27 could grow optimally within relatively wide tolerance ranges, including temperature of 25-37oC, pH values of 6-11, and NaCl concentration of 0-2%, and they could assimilate many various carbon and nitrogen sources.
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