Historic exposure to herbivores, not constitutive traits, explains plant tolerance to herbivory in the case of two Medicago species (Fabaceae)
Capo, Miquel (Universitat de les Illes Balears. Departament de Biologia)
Roig-Oliver, M. (Universitat de les Illes Balears. Departament de Biologia)
Cardona, C. (Centre Forestal de les Illes Balears. Institut Balear de la Natura)
Cursach, J. (Universitat de les Illes Balears. Departament de Biologia)
Bartolomé, Jordi (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)
Rita, J. (Universitat de les Illes Balears. Departament de Biologia)
Baraza Ruíz, Elena (Universitat de les Illes Balears. Departament de Biologia)

Data:	2021
Resum:	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.
Ajuts:	Ministerio de Economía y Competitividad CGL2015-70449-R Ministerio de Economía y Competitividad FPU16/01544
Nota:	Altres ajuts: Direcció General de Política Universitària i Recerca (Govern de les Illes Balears) FPI/1925/2016
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Introduced herbivores ; Medicago sp ; Mediterranean island ; Range-restricted species ; Tolerance
Publicat a:	Plant science, Vol. 307 (june 2021) , p. 110890, ISSN 1873-2259

DOI: 10.1016/j.plantsci.2021.110890
PMID: 33902851

11 p, 2.6 MB

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