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Chemical and mechanical defenses vary among maternal lines and leaf ages in Verbascum thapsus L. (Scrophulariaceae) and reduce palatability to a generalist insect
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SYSNO ASEP 0434700 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Chemical and mechanical defenses vary among maternal lines and leaf ages in Verbascum thapsus L. (Scrophulariaceae) and reduce palatability to a generalist insect Author(s) Alba, Christina (BU-J) RID
Bowers, M. D. (US)
Blumenthal, D. (US)
Hufbauer, R. A. (US)Number of authors 4 Source Title PLoS ONE. - : Public Library of Science - ISSN 1932-6203
Roč. 9, č. 8 (2014), s. 1-11, e104889Number of pages 11 s. Language eng - English Country US - United States Keywords iridoid glycoside ; plant defense ; herbivory Subject RIV EF - Botanics Institutional support BU-J - RVO:67985939 UT WOS 000340879300060 DOI 10.1371/journal.pone.0104889 Annotation Intra-specific variation in host-plant quality affects herbivore foraging decisions and, because of this, can feed back to shape plant fitness. In particular, among- and within-plant variation in defense shapes herbivore behavior, and if genetically based, may respond to natural selection by herbivores. We quantified intra-specific variation in iridoid glycosides, trichome length, and leaf strength in common mullein (Verbascum thapsus L, Scrophulariaceae) among maternal lines within a population and among leaves within plants, and related this variation to feeding preferences of a generalist herbivore, Trichopulsia ni Hübner. We found significant variation in all three defenses among maternal lines, with T. ni preferring plants with lower investment in chemical, but not mechanical, defense. Within plants, old leaves had lower levels of all defenses than young leaves, and were strongly preferred by T. ni. Caterpillars also preferred leaves with trichomes removed to leaves with trichomes intact. Differences among maternal lines indicate that phenotypic variation in defenses likely has a genetic basis. Furthermore, these results reveal that the feeding behaviors of T. ni map onto variation in plant defense in a predictable way. This work highlights the importance of variation in host-plant quality in driving interactions between plants and their herbivores. Workplace Institute of Botany Contact Martina Bartošová, martina.bartosova@ibot.cas.cz, ibot@ibot.cas.cz, Tel.: 271 015 242 ; Marie Jakšová, marie.jaksova@ibot.cas.cz, Tel.: 384 721 156-8 Year of Publishing 2015
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