Analysis of the effect of autochthonous isolates of Streptomyces spp. on growth, development and plant protection in soybean

VILLAFAÑES, D; MALDONADO, R; BIANCHI, JULIETA S.; GRAMAJO, HUGO; RODRIGUEZ, E; CHIESA, M.A.

Rosario

Seminario; Seminario franco-argentino sobre agroecología; 2022

Programa Argentina Francia Agricultura Programa de Movilidad Universitaria y Agroecología

Currently, the development of sustainable and eco-friendly strategies to reduce the intensive use of agrochemicals in crop production is essential. The utilization of soil beneficial microbes as plant growth-promoters and biocontrol agents has been proved to be one of the main alternatives. In this work, seventy-eight actinobacteria belonging mainly to the genus Streptomyces were isolated from the rhizosphere of soybean plants from the core productive zone of Argentina. Particularly, two strains were selected based on their compatibility with Bradyrhizobium japonicum, their ability to produce phytohormones, siderophores and solubilize phosphate and their antagonism to different fungal pathogens, in vitro. Then, the effect of adding these selected Streptomyces strains on growth and development at different stages of soybean plants and their effect on plant protection, was tested. As results, plant growth and development promotion were evidenced. The percentage of seed germination and seedlings emergence were higher in non-sterile soil compared to the non-treated control and the antifungal (AF) treatment (P