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PLoS One

Title:		The composite effect of transgenic plant volatiles for acquired immunity to herbivory caused by inter-plant communications
Author(s):		Muroi A; Ramadan A; Nishihara M; Yamamoto M; Ozawa R; Takabayashi J; Arimura G;
Address:		"Global COE Program: Evolution and Biodiversity, Graduate School of Science, Kyoto University, Kyoto, Japan"
Journal Title:		PLoS One
Year:		2011
Volume:		20111012
Issue:		10
Page Number:		e24594 -
DOI:		10.1371/journal.pone.0024594
ISSN/ISBN:		1932-6203 (Electronic) 1932-6203 (Linking)
Abstract:		"A blend of volatile organic compounds (VOCs) emitted from plants induced by herbivory enables the priming of defensive responses in neighboring plants. These effects may provide insights useful for pest control achieved with transgenic-plant-emitted volatiles. We therefore investigated, under both laboratory and greenhouse conditions, the priming of defense responses in plants (lima bean and corn) by exposing them to transgenic-plant-volatiles (VOCos) including (E)-beta-ocimene, emitted from transgenic tobacco plants (NtOS2) that were constitutively overexpressing (E)-beta-ocimene synthase. When lima bean plants that had previously been placed downwind of NtOS2 in an open-flow tunnel were infested by spider mites, they were more defensive to spider mites and more attractive to predatory mites, in comparison to the infested plants that had been placed downwind of wild-type tobacco plants. This was similarly observed when the NtOS2-downwind maize plants were infested with Mythimna separata larvae, resulting in reduced larval growth and greater attraction of parasitic wasps (Cotesia kariyai). In a greenhouse experiment, we also found that lima bean plants (VOCos-receiver plants) placed near NtOS2 were more attractive when damaged by spider mites, in comparison to the infested plants that had been placed near the wild-type plants. More intriguingly, VOCs emitted from infested VOCos-receiver plants affected their conspecific neighboring plants to prime indirect defenses in response to herbivory. Altogether, these data suggest that transgenic-plant-emitted volatiles can enhance the ability to prime indirect defenses via both plant-plant and plant-plant-plant communications"
Keywords:		Acyclic Monoterpenes Adaptive Immunity/*drug effects Alkenes/analysis/pharmacology Animals Fabaceae/drug effects/physiology Female Herbivory/*drug effects Larva/drug effects/physiology Moths/drug effects/physiology Plant Immunity/*drug effects Plants/*dru;
Notes:		"MedlineMuroi, Atsushi Ramadan, Abdelaziz Nishihara, Masahiro Yamamoto, Masaki Ozawa, Rika Takabayashi, Junji Arimura, Gen-ichiro eng Research Support, Non-U.S. Gov't 2011/10/25 PLoS One. 2011; 6(10):e24594. doi: 10.1371/journal.pone.0024594. Epub 2011 Oct 12"