Descripción del proyecto
Las adaptaciones de las plantas a los ataques de los herbívoros
Los insectos herbívoros constituyen una amenaza para las plantas, ya que sus ataques se producen de forma impredecible. Las plantas muestran plasticidad fenotípica en sus mecanismos de defensa y en su capacidad de respuesta. Sin embargo, el fenotipo vegetal manifestado puede atraer a más herbívoros, alterar la composición general de la comunidad de atacantes y limitar las capacidades fisiológicas de respuesta de las plantas. Es necesario estudiar la naturaleza adaptativa de la plasticidad de las plantas en relación con la previsibilidad de los ataques de herbívoros. En el proyecto MULTIATTACK, financiado con fondos europeos, se integrará la ecología de comunidades con el modelado de inferencia de redes de comunidades de insectos para determinar la predictibilidad de las comunidades dinámicas de atacantes en especies de «Brassicaceae». Además, tiene como fin investigar la consistencia en las respuestas de los insectos herbívoros a los fenotipos inducidos de diferentes plantas «Brassicaceae» y comprender las adaptaciones fisiológicas a los ataques (im)predecibles de múltiples herbívoros.
Objetivo
Individual plants are exposed to many stresses with insect herbivores being a prominent one. The occurrence of insect herbivores may be unpredictable in terms of when, by which species, and in which order the attack will take place. To deal with unpredictability of attack, plants are phenotypically plastic in their defence. They respond to attackers with the induction of specific defences and saving costs of defence in their absence. However, the induced plant phenotype may attract additional herbivores, alter the entire community composition of attackers and limit physiological capabilities of plant responses to subsequent attackers. An optimal response to one attacker should thus anticipate these consequences of induced responses. To understand the adaptive nature of plant plasticity to herbivore attack, it is essential to assess fitness consequences of an induced response when plants are exposed to multi-herbivory by their entire insect community. This requires a novel approach of comparing plant species adaptations in defence plasticity to the level of predictability in the dynamics of their insect community, such as order of herbivore arrival. To do so, this research proposal has three objectives: 1) Identifying the predictability of dynamic attacker communities of Brassicaceae species, 2) Understanding physiological adaptations to (un)predictable multi-herbivore attack, and 3) Identifying consistency in responses of insect herbivores to induced phenotypes of different Brassicaceae. By integrating community ecology with network inference modelling of insect communities, the nature of predictability of insect communities of nine annual Brassicaceae plant species will be identified and linked to species-specific physiological adaptations to multi-herbivory. This multidisciplinary community approach will provide novel insights into the evolution of plant phenotypic plasticity in defence, which is a central paradigm in the field of plant-insect interactions.
Ámbito científico
Programa(s)
Régimen de financiación
ERC-STG - Starting GrantInstitución de acogida
6708 PB Wageningen
Países Bajos