Streptomyces spp. biocontrol activities emphasize the bioprospection significance on the development of new products

Abstract: The Streptomyces biotechnological potential has been the subject of huge publication numbers, thus leading interest to be bioprospected as source of different compounds including, pesticides, antibiotics, plant growth promoters, antitumor and others. In this study the biocontrol activity of 15 Streptomyces spp. strains isolated from three Brazilian biomes and its transitions were evaluated in vitro and at greenhouse experiments. The nematicidal activity against Meloidogyne incognita was observed in all strains, which inhibited eggs from hatching. Also, strains HTS2817A and HTS2818A presented biocontrol activities against symptoms caused by C. gossypii CML2324 at greenhouse, reducing the incidence of the disease and increasing the shoots dry mass, while 60 % of the isolates increased seed germination and 100 % decreased plants damping-off. Other experiments are still being conduct, like metabolites production to elucidate the biocontrol efficiency and fingerprint genetic profiles to clarify the genetic diversity of strains in study.