STINK BUG DAMAGE INDUCED PLANT VOLATILES IN CORN (Zea mays) SEEDLINGS REGULATED BY JASMONIC ACID PATHWAY

BARRIGA LG; FERNÁNDEZ PC; MITHÖFER, AXEL; ZAVALA J.A.; JACOBI V.G.; ALMEIDA-TRAPP M

Buenos Aires

Congreso; Fronteras en Biociencias 3; 2018

Max Planck Institute

Dichelops furcatus (Hemiptera: Pentatomidae) is a generalist neotropical stink bug whosepopulation has increased in Argentina in the last years, and recently has become an importantpest in corn (Zea mays) crops. This stink bug attacks corn at seedling stage, decreasing cropyield. Corn seedlings emit a cocktail of volatile organic compounds (VOCs) that can be used bythese insects as cues to identify their hosts. To understand the mechanisms of VOCs emittedby corn seedlings in responses to stink bug damage, we studied phytohormones that regulateVOCs emission. We studied VOCs emission in undamaged and damaged seedlings by D.furcatus of two corn commercial hybrids, using a coupled gas chromatography ? massspectrometry (GC-MS). Analysis of collected volatiles showed significant differences betweenundamaged and damaged seedlings after two hours. Insect attack induced the emission of(E)-Linalool oxide, Linalool, DMNT, Ethyl Benzoate, (E)-Geranyl acetate, (E)-β-Farnesene andTMNT; and repressed the emission of Methyl Salicilate (p