Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 550761
Title Defending flowers against multiple attack: from phytohormones to plant ecology
Author(s) Chrétien, Lucille T.S.
Source Wageningen University. Promotor(en): M. Dicke; D. Giron, co-promotor(en): D. Lucas-Barbosa. - Wageningen : Wageningen University - ISBN 9789463434331 - 259
Department(s) Laboratory of Entomology
Organic Chemistry
Publication type Dissertation, internally prepared
Publication year 2019
Availibility Full text available from 2020-05-24
Abstract My thesis aimed at investigating the defensive and reproductive strategies of plants when flowers are under multiple attack by two florivorous insect species (aphid, caterpillar) and a phytopathogenic bacterium. The study of Brassica nigra, an annual outcrossing Brassicaceae, indicated that inflorescences under attack were more resistant to caterpillars than to aphids. This project identified jasmonates as the main phytohormones mediating plant responses to attack, and jasmonates were particularly upregulated in inflorescences exposed to single or dual attack by caterpillars. Glucosinolates were not induced in inflorescences and these defensive compounds likely did not mediate induced direct resistance against florivores. Attack induced changes in the volatile emission of plants in the flowering stage, especially when caterpillars were among the attackers. However, plants maintained their interaction with parasitoid wasps that mediated indirect defences against florivores. Moreover, changes in primary metabolism may have contributed to plant compensation for damage inflicted by the attackers and overall, to plant tolerance to attacks. Finally, plants maintained interactions with pollinators despite the phytochemical changes induced upon attack.
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