Historic exposure to herbivores, not constitutive traits, explains plant tolerance to herbivory in the case of two Medicago species (Fabaceae)
| Autor: | Joana Cursach, Carles Cardona, Jordi Bartolomé, Juan Rita, Miquel Capó, Margalida Roig-Oliver, Elena Baraza |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Crops Agricultural Genotype Plant Science Biology Photosynthesis Medicago sp 01 natural sciences Introduced herbivores 03 medical and health sciences Botany Genetics Medicago Plant Immunity Herbivory Plant evolution Herbivore Biomass (ecology) food and beverages Genetic Variation General Medicine Fabaceae biology.organism_classification Mediterranean island 030104 developmental biology Habitat Range-restricted species Spain Agronomy and Crop Science Tolerance Plant tolerance to herbivory 010606 plant biology & botany |
| Zdroj: | Dipòsit Digital de Documents de la UAB Universitat Autònoma de Barcelona |
| ISSN: | 1873-2259 |
| Popis: | Altres ajuts: Direcció General de Política Universitària i Recerca (Govern de les Illes Balears) FPI/1925/2016 Mechanisms that allow plants to survive and reproduce after herbivory are considered to play a key role in plant evolution. In this study, we evaluated how tolerance varies in species with different historic exposure to herbivores considering ontogeny. We exposed the range-restricted species Medicago citrina and its closely related and widespread species M. arborea to one and two herbivory simulations (80 % aerial biomass loss). Physiological and growth parameters related to tolerance capacity were assessed to evaluate constitutive values (without herbivory) and induced tolerance after damage. Constitutive traits were not always related to greater tolerance, and each species compensated for herbivory through different traits. Herbivory damage only led to mortality in M. citrina; adults exhibited root biomass loss and increased oxidative stress after damage, but also compensated aerial biomass. Despite seedlings showed a lower death percentage than adults after herbivory in M. citrina, they showed less capacity to recover control values than adults. Moderate tolerance to M. arborea herbivory and low tolerance to M. citrina is found. Thus, although the constitutive characteristics are maintained in the lineage, the tolerance of plants decreases in M. citrina. That represents how plants respond to the lack of pressure from herbivores in their habitat. |
| Databáze: | OpenAIRE |
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