| Title: | Anthonomus grandis aggregation pheromone induces cotton indirect defence and attracts the parasitic wasp Bracon vulgaris |
| Author(s): | Magalhaes DM; Da Silva I; Borges M; Laumann RA; Blassioli-Moraes MC; |
| Address: | "Department of Zoology, Institute of Biological Sciences, University of Brasilia, Brasilia-DF, Brazil. Department of Biological Control, EMBRAPA Genetic Resources and Biotechnology, Brasilia-DF, Brazil. Department of Plant and Environmental Science, Centre for Agricultural Science, Federal University of Paraiba, Areia-PB, Brazil" |
| ISSN/ISBN: | 1460-2431 (Electronic) 0022-0957 (Linking) |
| Abstract: | "Insect-derived volatiles seem to provide reliable chemical cues that plants could employ to defend themselves. Here we investigated the effect of pheromone emission from a closely associated (Anthonomus grandis; boll weevil) and an unassociated (Tibraca limbativentris) herbivore on cotton volatile emission. Exposure to A. grandis aggregation pheromone induced cotton defence response by enhancing the emission of volatiles attractive to the natural enemy of A. grandis, the parasitic wasp Bracon vulgaris, but only when the pheromonal blend was complete (all four components). Individual components of A. grandis aggregation pheromone were not able to induce cotton plants to increase the release of volatiles. On the other hand, T. limbativentris sex pheromone did not induce any change in the cotton constitutive volatile profile. Our results support the hypothesis that plants are able to detect pheromones of tightly co-evolved herbivores. Moreover, A. grandis pheromone exposure induced similar volatile compounds to herbivore-induced cotton, such as linalool, (E)-ocimene, (E)-4,8-dimethylnona-1,3,7-triene (DMNT), and (E,E)-4,8,12-trimethyltrideca-1,3,7,11-tetraene (TMTT). We also showed that the larval ectoparasitoid B. vulgaris relies on boll weevil's aggregation pheromone and pheromone-induced plant volatiles as kairomones to locate suitable hosts" |
| Keywords: | Animals Chemotaxis Female Gossypium/drug effects/*physiology Hemiptera/*chemistry Host-Parasite Interactions Larva/chemistry/growth & development Male Pheromones/*chemistry Volatile Organic Compounds/*metabolism Wasps/*parasitology Weevils/*chemistry/grow; |
| Notes: | "MedlineMagalhaes, Diego Martins Da Silva, Izabela Thais Fidelis Alves Borges, Miguel Laumann, Raul Alberto Blassioli-Moraes, Maria Carolina eng Research Support, Non-U.S. Gov't England 2019/02/06 J Exp Bot. 2019 Mar 27; 70(6):1891-1901. doi: 10.1093/jxb/erz040" |
