Display Settings:

Format

Send to:

Choose Destination
Ecol Lett. 2011 Nov;14(11):1075-83. doi: 10.1111/j.1461-0248.2011.01674.x. Epub 2011 Aug 10.

Maize landraces recruit egg and larval parasitoids in response to egg deposition by a herbivore.

Author information

  • 1Habitat Management Programme, International Centre of Insect Physiology and Ecology, PO Box 30, Mbita Point, Kenya.

Abstract

Natural enemies respond to herbivore-induced plant volatiles (HIPVs), but an often overlooked aspect is that there may be genotypic variation in these 'indirect' plant defence traits within plant species. We found that egg deposition by stemborer moths (Chilo partellus) on maize landrace varieties caused emission of HIPVs that attract parasitic wasps. Notably, however, the oviposition-induced release of parasitoid attractants was completely absent in commercial hybrid maize varieties. In the landraces, not only were egg parasitoids (Trichogramma bournieri) attracted but also larval parasitoids (Cotesia sesamiae). This implies a sophisticated defence strategy whereby parasitoids are recruited in anticipation of egg hatching. The effect was systemic and caused by an elicitor, which could be extracted from egg materials associated with attachment to leaves. Our findings suggest that indirect plant defence traits may have become lost during crop breeding and could be valuable in new resistance breeding for sustainable agriculture.

© 2011 Blackwell Publishing Ltd/CNRS.

PMID:
21831133
[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Icon for Blackwell Publishing
    Loading ...
    Write to the Help Desk