Bibliographic citations
Quiñones, L., (2022). Actividad inhibitoria in vitro de metabolitos secundarios de Bacillus spp. y Burkholderia vietnamiensis sobre Rhizoctonia sp. [Universidad Nacional de San Martín. Fondo Editorial]. http://hdl.handle.net/11458/4368
Quiñones, L., Actividad inhibitoria in vitro de metabolitos secundarios de Bacillus spp. y Burkholderia vietnamiensis sobre Rhizoctonia sp. []. PE: Universidad Nacional de San Martín. Fondo Editorial; 2022. http://hdl.handle.net/11458/4368
@misc{renati/1058022,
title = "Actividad inhibitoria in vitro de metabolitos secundarios de Bacillus spp. y Burkholderia vietnamiensis sobre Rhizoctonia sp.",
author = "Quiñones Pezo, Liz Cheril",
publisher = "Universidad Nacional de San Martín. Fondo Editorial",
year = "2022"
}
Sheath blast caused by the fungus Rhizoctonia sp. is one of the main phytosanitary problems in rice cultivation, as it reduces yields and grain quality. The control of this disease involves excessive use of fungicides and it is necessary to look for alternatives to reduce the use of these products. In this sense, there are microorganisms that produce secondary metabolites with antifungal characteristics that could be used as a substitute for chemical control. The objective of this work was to determine the inhibitory activity of secondary metabolites produced by Bacillus spp. and Burkholderia vietnamiensis strains on the development of Rhizoctonia sp. The in vitro inhibitory activity of 19 bacterial strains (16 Bacillus spp. and 3 Burkholderia vietnamiensis) was evaluated according to the growth of the phytopathogen, both in TSB medium and in mineral medium (MM). Five bacterial strains were selected: B. subtilis SM59, B. aryabhattai SM3 and three strains of B. vietnamiensis T34-1, T34-2, T33-1. The evaluation of the development of the strains revealed that the treatments had a differentiated growth in each of the media used, with T1 (strain SM 59) being the one that caused the greatest inhibition of the development of Rhizoctonia sp. (5.53 cm2) on MM medium, followed by T2 (strain SM 3) (11.76 cm2) on TSB medium. The metabolites of the five bacterial strains showed a highly significant inhibition response of Rhizoctonia sp. on MM medium. This inhibition behavior was also present during the strain selection process when the bacteria were in contact with Rhizoctonia sp. The findings provide new possibilities of biotechnological interest to develop effective products based on easily extractable non-volatile secondary bacterial metabolites, as an alternative to chemical fungicides applied to rice cultivation.
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