| Title: | Volatiles mediating a plant-herbivore-natural enemy interaction in resistant and susceptible soybean cultivars |
| Author(s): | Michereff MF; Laumann RA; Borges M; Michereff-Filho M; Diniz IR; Neto AL; Moraes MC; |
| Address: | "Embrapa Recursos Geneticos e Biotecnologia, Brasilia, Brazil" |
| DOI: | 10.1007/s10886-011-9917-4 |
| ISSN/ISBN: | 1573-1561 (Electronic) 0098-0331 (Linking) |
| Abstract: | "Several studies have shown that herbivore-induced plant volatiles act directly on herbivores and indirectly on their natural enemies. However, little is known about the effect of herbivore damage on resistant and susceptible plant cultivars and its effect on their natural enemies. Thus, the aim of this study was to evaluate the attraction of the herbivorous pentatomid bug Euschistus heros and its egg parasitoid Telenomus podisi to two resistant and one susceptible soybean cultivars with different types of damage (herbivory, herbivory+oviposition, and oviposition). In a Y-tube olfactometer, the parasitoids were attracted to herbivory and herbivory+oviposition damaged soybean plants when compared to undamaged soybean plants for the resistant cultivars, but did not show preference for the susceptible cultivar Silvania in any of the damage treatments. The plant volatiles emitted by oviposition-damaged plants in the three cultivars did not attract the egg parasitoid. In four-arm-olfactometer bioassays, E. heros females did not show preference for odors of damaged or undamaged soybean plants of the three cultivars studied. The Principal Response Curves (PRC) analysis showed consistent variability over time in the chemical profile of volatiles between treatments for the resistant cultivar Dowling. The compounds that most contributed to the divergence between damaged soybean plants compared to undamaged plants were (E,E)-alpha-farnesene, methyl salicylate, (Z)-3-hexenyl acetate, and (E)-2-octen-1-ol" |
| Keywords: | "Acetates/metabolism Animals Behavior, Animal Female Host-Parasite Interactions Hymenoptera/physiology Octanols/metabolism Oviposition/physiology Pentastomida/physiology Plant Leaves/parasitology/physiology Salicylates/metabolism Sesquiterpenes/metabolism;" |
| Notes: | "MedlineMichereff, Mirian Fernandes Furtado Laumann, Raul Alberto Borges, Miguel Michereff-Filho, Miguel Diniz, Ivone Rezende Neto, Austeclinio Lopes Farias Moraes, Maria Carolina Blassioli eng Research Support, Non-U.S. Gov't 2011/02/15 J Chem Ecol. 2011 Mar; 37(3):273-85. doi: 10.1007/s10886-011-9917-4. Epub 2011 Feb 12" |
