Vol. 5, Issue 1 (2020)
The role of herbivore-induced plant volatiles (HIPVs) as indirect plant defense mechanism in a diverse plant species: A review
Author(s): Haftay Gebreyesus Gebreziher
Abstract: In response to herbivore attack, plants release herbivore-induced plant volatiles (HIPVs) to the environment to communicate with higher trophic levels. The HIPVs are mainly important for attraction of natural enemies that attack the herbivore in which the interaction among the plant, herbivore and natural enemies is referred to as tritrophic interaction. Besides, HIPVs are important for plant-plant interaction and plant-herbivore interaction. The attractiveness of HIPVs to natural enemies in a tritrophic interaction varies depending on species diversity. Under natural and multiple cropping systems, tritrophic interaction is expected to be more complex than simple tritrophic interaction (one species per trophic level). In complex tritrophic interaction, diversity of different trophic levels affects attractiveness of HIPVs to natural enemies. From plant diversity point of view, HIPVs mixture emanating from herbivore-damaged multiple plant species are reported to affect behavioral responses and foraging behavior of natural enemies under laboratory and field conditions. This paper reviews findings on the role of HIPVs as indirect plant defense in tritrophic interaction systems consisting of diverse plants species.