Root volatiles in plant-plant interactions II: Root terpenes from Centaurea stoebe modify Taraxacum officinale root chemistry and root herbivore growth

Huang, Wei; Gfeller, Valentin; Erb, Matthias (13 October 2018). Root volatiles in plant-plant interactions II: Root terpenes from Centaurea stoebe modify Taraxacum officinale root chemistry and root herbivore growth (Unpublished) (bioRxiv 441790). Cold Spring Harbor Laboratory 10.1101/441790

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Volatile organic compounds (VOCs) emitted by plant roots can influence the germination and growth of neighboring plants. However, little is known about the effects of root VOCs on plant-herbivore interactions. The spotted knapeed (Centaurea stoebe) constitutively releases high amounts of sesquiterpenes into the rhizosphere. Here, we examine the impact of C. stoebe root VOCs on 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)-β-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 neighboring plants. The release of VOCs to increase the susceptibility of other plants may be a form of plant offense.

Item Type:

Working Paper

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Biotic Interactions
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Huang, Wei; Gfeller, Valentin Johannes and Erb, Matthias

Subjects:

500 Science > 580 Plants (Botany)

Series:

bioRxiv

Publisher:

Cold Spring Harbor Laboratory

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

19 Nov 2018 08:56

Last Modified:

23 Oct 2019 15:00

Publisher DOI:

10.1101/441790

Additional Information:

unpublished preprint

BORIS DOI:

10.7892/boris.121140

URI:

https://boris.unibe.ch/id/eprint/121140

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