VALORACIÓN DE LA EFICACIA DE QUITOOLIGOSACÁRIDO PROVENIENTE DE RECURSOS DEL MAR ARGENTINO PARA EL CONTROL DE FUSARIUM EUMARTII

MANSILLA, A.Y.; MENDIETA, J.R.; TONÓN, C.V.; ALBERTENGO, L.; RODRIGUEZ, M.S.; CASALONGUÉ, C.A.

SNS

Servicio Nacional de Sanidad y Calidad Agroalimentaria de la República Argentina (Senasa)

Lugar: Buenos Aires; Año: 2015 vol. 1 p. 32 - 39

2314-2901

Our specific aim was to study the properties ofchitooligosaccharide as a natural agent. The protectiveaction of chitooligosaccharide against the pathogenicfungus Fusarium solani f sp eumartii (F. eumartii) inseedlings of tomato (Solanum lycopersicum cultivarPlatense) was analyzed. We selected a tomato genotypeof horticultural interest in the Province of BuenosAires and a fungal isolated from the same region.Our results showed that tomato seedlings pretreatedwith chitooligosaccharide were protected againstinfection by F. eumartii, resulting in a significantdecrease in the area of the fungal lesion detected incotyledons. Moreover, antimicrobial properties by thechitooligosaccharide were demonstrated through areduction of the mycelial growth and spore germination.The loss of spore viability exerted by the action ofchitooligosaccharide revealed its fungicidal effect.Furthermore, the effect of the chitooligosaccharideas elicitor of the plant defense response was alsoproved. When plants were treated with 0.025% (m/v)chitooligosaccharide during 6 hours, an increase ofabout 40% in the abundance of chitinase as a defensemarker protein was measured. Finally, we proposethat the chitooligosaccharide represents a naturalcompound that brings promising biological activitiesfor its use as a natural antimicrobial agent in thehorticultural field.