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- W3098050914 abstract "Abstract Herbivory shapes plant trait evolution by altering allocation to growth and defense in ways that affect plant reproduction and fitness. Initiation of these trade-offs may be particularly strong in juvenile plants with high phenotypic plasticity. Herbivory costs are often measured in terms of plant size or flower numbers, but other herbivore-induced floral changes can alter interactions with pollinators and have important implications for mating systems. In mixed-mating plants that can both self-fertilize and outcross, herbivory can maintain mating system variation if herbivore damage and defensive induction change a plant’s likelihood of selfing versus outcrossing. Here, I use mixed-mating Datura stramonium to evaluate how early defensive induction and herbivory result in trade-offs among plant defense, growth and reproduction. I used a 2×2 factorial manipulation of early chemical defense induction and season-long insecticide in the field. Growth costs of chemical induction were seen even before plants received damage, indicating an inherent cost of defense. Induction and herbivory changed multiple aspects of floral biology associated with a plant’s selfing or outcrossing rate. This including reduced floral allocation, earlier flowering, and reduced anther-stigma separation (herkogamy). Although these floral changes are associated with decreased attractiveness to pollinators, plants exposed to natural herbivory did not have decreased seed set. This is likely because their floral morphologies became more conducive to selfing (via reduced herkogamy). These vegetative and floral changes following damage and defensive induction can impact interactions among plants (by altering mating environment) and interactions with pollinators (via changes in floral allocation and floral phenology)." @default.
- W3098050914 created "2020-11-23" @default.
- W3098050914 creator A5014007567 @default.
- W3098050914 date "2020-11-08" @default.
- W3098050914 modified "2023-10-18" @default.
- W3098050914 title "Costly induction of defense reduces plant growth and alters reproductive traits in mixed-mating Datura stramonium" @default.
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- W3098050914 doi "https://doi.org/10.1101/2020.11.06.371989" @default.
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