Title: Eliciting maize defense pathways aboveground attracts belowground biocontrol agents
Author: Filgueiras, C.C.; Willett, D. S.; Pereira, R.V.; Moino Junior, A.; Pareja, M.; Duncan, L. W.
Is part of: Scientific Reports, v. 6, p. 36484 -
Citation: Filgueiras, C.C.; Willett, D. S.; Pereira, R.V.; Moino Junior, A.; Pareja, M.; Duncan, L. W.; Eliciting maize defense pathways aboveground attracts belowground biocontrol agents. Scientific Reports, v.6, p. 36484-, 2016
Abstract: Plant defense pathways mediate multitrophic interactions above and belowground. Understanding the effects of these pathways on pests and natural enemies above and belowground holds great potential for designing effective control strategies. Here we investigate the effects of aboveground stimulation of plant defense pathways on the interactions between corn, the aboveground herbivore adult Diabrotica speciosa, the belowground herbivore larval D. speciosa, and the subterranean entomopathogenic nematode natural enemy Heterorhabditis amazonensis. We show that adult D. speciosa recruit to aboveground herbivory and methyl salicylate treatment, that larval D. speciosa are relatively indiscriminate, and that H. amazonensis en-tomopathogenic nematodes recruit to corn fed upon by adult D. speciosa. These results suggest that entomopathogenicnematodes belowground can be highly attuned to changes in the aboveground parts of plants and that biological control can be enhanced with induced plant defense in this and similar systems.
Funding: We thank Maria Eduarda C.F.R. Silva who assisted with and provided invaluable support for all aspects of the project. The Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) program and the Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) provided financial support for the project through studentships and grants to CCF. MP was supported by a FAEPEX-PAPDIC grant from UNICAMP.