Effect of autochthonous isolates of Streptomyces spp. on growth, development and plant protection in soybean

TADDIA, C.; VILLAFAÑES, D; BIANCHI, J; GRAMAJO, H.; RODRIGUEZ, E; CHIESA, MA. AMALIA,

Santa Fe

Congreso; XXXIII Argentinian meeting of Plant Physiology (Reunión Argentina de Fisiología Vegetal); 2021

Sociedad Argentina de fisiología vegetal (SAFV)

One of the biggest challenges facing the world is to increase food production from agriculture, minimizing the impact on the environment, mainly on the soil. A sustainable and eco-friendly strategy to reduce the intensive use of agrochemicals is its replacement by plant growth-promoting rhizospheric beneficial microorganisms. 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. Four 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 impact of adding 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 treatment (P