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Plant Cell Environ

Title:		Integration of two herbivore-induced plant volatiles results in synergistic effects on plant defence and resistance
Author(s):		Hu L; Ye M; Erb M;
Address:		"Institute of Plant Sciences, University of Bern, Bern, Switzerland"
Journal Title:		Plant Cell Environ
Year:		2019
Volume:		20181016
Issue:		3
Page Number:		959 - 971
DOI:		10.1111/pce.13443
ISSN/ISBN:		1365-3040 (Electronic) 0140-7791 (Print) 0140-7791 (Linking)
Abstract:		"Plants can use induced volatiles to detect herbivore- and pathogen-attacked neighbors and prime their defenses. Several individual volatile priming cues have been identified, but whether plants are able to integrate multiple cues from stress-related volatile blends remains poorly understood. Here, we investigated how maize plants respond to two herbivore-induced volatile priming cues with complementary information content, the green leaf volatile (Z)-3-hexenyl acetate (HAC) and the aromatic volatile indole. In the absence of herbivory, HAC directly induced defence gene expression, whereas indole had no effect. Upon induction by simulated herbivory, both volatiles increased jasmonate signalling, defence gene expression, and defensive secondary metabolite production and increased plant resistance. Plant resistance to caterpillars was more strongly induced in dual volatile-exposed plants than plants exposed to single volatiles.. Induced defence levels in dual volatile-exposed plants were significantly higher than predicted from the added effects of the individual volatiles, with the exception of induced plant volatile production, which showed no increase upon dual-exposure relative to single exposure. Thus, plants can integrate different volatile cues into strong and specific responses that promote herbivore defence induction and resistance. Integrating multiple volatiles may be beneficial, as volatile blends are more reliable indicators of future stress than single cues"
Keywords:		"Abscisic Acid/metabolism Animals Cyclopentanes/metabolism Gene Expression Regulation, Plant *Herbivory Larva Oxylipins/metabolism Plant Growth Regulators/physiology Plant Leaves/metabolism/physiology Plant Physiological Phenomena Spodoptera Transcriptome;"
Notes:		"MedlineHu, Lingfei Ye, Meng Erb, Matthias eng ERC-2016-STG 714239/ERC_/European Research Council/International 157884/SNSF_/Swiss National Science Foundation/Switzerland 160786/SNSF_/Swiss National Science Foundation/Switzerland 155781/SNSF_/Swiss National Science Foundation/Switzerland Research Support, Non-U.S. Gov't 2018/09/09 Plant Cell Environ. 2019 Mar; 42(3):959-971. doi: 10.1111/pce.13443. Epub 2018 Oct 16"