Artículo
Selection on tropane alkaloids in native and non‐native populations of Datura stramonium
Autor/es | Castillo, Guillermo
Calahorra Oliart, Adriana Núñez Farfán, Juan Valverde, Pedro L. Arroyo Marín, Juan Cruz, Laura L. Tapia López, Rosalinda |
Departamento | Universidad de Sevilla. Departamento de Biología Vegetal y Ecología |
Fecha de publicación | 2019 |
Fecha de depósito | 2021-05-12 |
Publicado en |
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Resumen | heories of plant invasion based on enemy release in a new range assume that selection exerted by specialist herbivores on defence traits should be reduced, absent, or even selected against in the new environment. Here, we ... heories of plant invasion based on enemy release in a new range assume that selection exerted by specialist herbivores on defence traits should be reduced, absent, or even selected against in the new environment. Here, we measured phenotypic selection on atropine and scopolamine concentration of Datura stramonium in eight native (Mexico) and 14 non‐native (Spain) populations. Native populations produced between 20 and 40 times more alkaloid than non‐native populations (atropine: 2.0171 vs. 0.0458 mg/g; scopolamine: 1.004 vs. 0.0488 mg/g, respectively). Selection on alkaloids was negative for atropine and positive for scopolamine concentration in both ranges. However, the effect sizes of selection gradients were only significant in the native range. Our results support the assumption that the reduction of plant defence in the absence of the plant's natural enemies in invasive ranges is driven by natural selection. |
Cita | Castillo, G., Calahorra Oliart, A., Núñez Farfán, J., Valverde, P.L., Arroyo Marín, J., Cruz, L.L. y Tapia López, R. (2019). Selection on tropane alkaloids in native and non‐native populations of Datura stramonium. Ecology and Evolution, 9, 10176-10184. |
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