Impact of Seasonal and Temperature-Dependent Variation in Root Defense Metabolites on Herbivore Preference in Taraxacum officinale

Huang, Wei; Bont, Zoe; Hervé, Maxime R.; Robert, Christelle A. M.; Erb, Matthias (2020). Impact of Seasonal and Temperature-Dependent Variation in Root Defense Metabolites on Herbivore Preference in Taraxacum officinale. Journal of Chemical Ecology, 46(1), pp. 63-75. Springer 10.1007/s10886-019-01126-9

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Plants experience seasonal fluctuations in abiotic and biotic factors such as herbivore attack rates. If and how root defense expression co-varies with seasonal fluctuations in abiotic factors and root herbivore attack rates is not well understood. Here, we evaluated seasonal changes in defensive root latex chemistry of Taraxacum officinale plants in the field and correlated the changes with seasonal fluctuations in abiotic factors and damage potential by Melolontha melolontha, a major natural enemy of T. officinale. We then explored the causality and consequences of these relationships under controlled conditions. The concentration of the defensive sesquiterpene lactone taraxinic acid β-D glucopyranosyl ester (TA-G) varied substantially over the year and was most strongly correlated to mean monthly temperature. Both temperature and TA-G levels were correlated with annual fluctuations in potential M. melolontha damage. Under controlled conditions, plants grown under high temperature produced more TA-G and were less attractive for M. melolontha. However, temperature-dependent M. melolontha feeding preferences were not significantly altered in TA-G deficient transgenic lines. Our results suggest that fluctuations in temperature leads to variation in the production of a root defensive metabolites that co-varies with expected attack of a major root herbivore. Temperature-dependent herbivore preference, however, is likely to be modulated by other phenotypic alterations.

Item Type:

Journal Article (Original Article)

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; Bont, Zoe Kalina; Hervé, Maxime; Robert, Christelle Aurélie Maud and Erb, Matthias

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

0098-0331

Publisher:

Springer

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

18 Dec 2019 10:21

Last Modified:

10 Mar 2021 19:33

Publisher DOI:

10.1007/s10886-019-01126-9

PubMed ID:

31832894

Uncontrolled Keywords:

below ground herbivory; circannual rhythms; Melolontha melolontha; root defense; primary and secondary metabolites; Taraxacum officinale

BORIS DOI:

10.7892/boris.136874

URI:

https://boris.unibe.ch/id/eprint/136874

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