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Plant Cell Environ

Title:		Root volatiles in plant-plant interactions II: Root volatiles alter root chemistry and plant-herbivore interactions of neighbouring plants
Author(s):		Huang W; Gfeller V; Erb M;
Address:		"Key Laboratory of Aquatic Plant and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China. Institute of Plant Sciences, University of Bern, Bern, Switzerland"
Journal Title:		Plant Cell Environ
Year:		2019
Volume:		20190408
Issue:		6
Page Number:		1964 - 1973
DOI:		10.1111/pce.13534
ISSN/ISBN:		1365-3040 (Electronic) 0140-7791 (Print) 0140-7791 (Linking)
Abstract:		"Volatile organic compounds (VOCs) emitted by plant roots can influence the germination and growth of neighbouring plants. However, little is known about the effects of root VOCs on plant-herbivore interactions of neighbouring plants. The spotted knapweed (Centaurea stoebe) constitutively releases high amounts of sesquiterpenes into the rhizosphere. Here, we examine the impact of C. stoebe root VOCs on the primary and secondary metabolites of sympatric Taraxacum officinale plants and the resulting plant-mediated effects on a generalist root herbivore, the white grub Melolontha melolontha. We show that exposure of T. officinale to C.stoebe root VOCs does not affect the accumulation of defensive secondary metabolites but modulates carbohydrate and total protein levels in T. officinale roots. Furthermore, VOC exposure increases M. melolontha growth on T. officinale plants. Exposure of T. officinale to a major C. stoebe root VOC, the sesquiterpene (E)-beta-caryophyllene, partially mimics the effect of the full root VOC blend on M. melolontha growth. Thus, releasing root VOCs can modify plant-herbivore interactions of neighbouring plants. The release of VOCs to increase the susceptibility of other plants may be a form of plant offense"
Keywords:		Animals Biological Phenomena Centaurea/*metabolism Coleoptera/physiology Herbivory/*physiology Plant Roots/*metabolism Plants/drug effects/metabolism Polycyclic Sesquiterpenes Secondary Metabolism Sesquiterpenes Switzerland Taraxacum/*metabolism Volatile;
Notes:		"MedlineHuang, Wei Gfeller, Valentin Erb, Matthias eng 629134/MCCC_/Marie Curie/United Kingdom 704334/MCCC_/Marie Curie/United Kingdom 157884/SNSF_/Swiss National Science Foundation/Switzerland 153517/SNSF_/Swiss National Science Foundation/Switzerland Research Support, Non-U.S. Gov't 2019/02/13 Plant Cell Environ. 2019 Jun; 42(6):1964-1973. doi: 10.1111/pce.13534. Epub 2019 Apr 8"