Leaf volatile and nonvolatile metabolites show different levels of specificity in response to herbivory

0575319 - MBÚ 2024 RIV US eng J - Článek v odborném periodiku
Mezzomo, P. - Weinhold, A. - Aurová, K. - Jorge, L. R. - Kozel, P. - Michálek, Jan - Nováková, N. - Seifert, C. L. - Volfová, T. - Engström, M. - Salminen, J. - Sedio, B. E. - Volf, M.
Leaf volatile and nonvolatile metabolites show different levels of specificity in response to herbivory.
Ecology and Evolution. Roč. 13, č. 5 (2023), č. článku e10123. ISSN 2045-7758. E-ISSN 2045-7758
Institucionální podpora: RVO:61388971
Klíčová slova: chemical diversity * defense specificity * herbivory * induction * Salix * specialized metabolites * volatile organic compounds
Obor OECD: Ecology
Impakt faktor: 2.6, rok: 2022
Způsob publikování: Open access
https://onlinelibrary.wiley.com/doi/10.1002/ece3.10123

Plants produce diverse chemical defenses with contrasting effects on different insect herbivores. Deploying herbivore-specific responses can help plants increase their defensive efficiency. Here, we explore how variation in induced plant responses correlates with herbivore species, order, feeding guild, and level of specialization. In a greenhouse experiment, we exposed 149 plants of Salix fragilis (Linnaeus, 1753) to 22 herbivore species naturally associated with this host. The insects belonged to four orders (Coleoptera, Lepidoptera, Hemiptera, and Hymenoptera), three feeding guilds (external leaf-chewers, leaf-tying chewers, and sap-sucking), and included both dietary specialists and generalists. Following herbivory, we quantified induced changes in volatiles and nonvolatile leaf metabolites. We performed multivariate analyses to assess the correlation between herbivore order, feeding guild, dietary specialization, chewing damage by herbivores, and induced responses. The volatile composition was best explained by chewing damage and insect order, with Coleoptera and Lepidoptera eliciting significantly different responses. Furthermore, we recorded significant differences in elicited volatiles among some species within the two orders. Variation in nonvolatile leaf metabolites was mainly explained by the presence of insects, as plants exposed to herbivores showed significantly different metabolites from controls. Herbivore order also played a role to some extent, with beetles eliciting different responses than other herbivores. The induction of volatile and nonvolatile leaf metabolites shows different levels of specificity. The specificity in volatiles could potentially serve as an important cue to specialized predators or parasitoids, increasing the efficacy of volatiles as indirect defenses. By contrast, the induction of nonvolatile leaf metabolites was largely unaffected by herbivore identity. Most nonvolatile metabolites were downregulated, possibly indicating that plants redirected their resources from leaves in response to herbivory. Our results demonstrate how diverse responses to herbivores can contribute to the diversity of plant defensive strategies.
Trvalý link: https://hdl.handle.net/11104/0345106