Implications of mistletoe parasitism for the host metabolome: A new plant identity in the forest canopy
Lázaro-González, Alba (University of Granada. Department of Ecology)
Gargallo-Garriga, Albert (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Hódar, José Antonio (University of Granada. Department of Ecology)
Sardans i Galobart, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Oravec, Michal (Academy of Sciences of the Czech Republic)
Urban, Otmar (Academy of Sciences of the Czech Republic)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Zamora Rodríguez, Regino (University of Granada. Department of Ecology)

Data:	2021
Resum:	Mistletoe-host systems exemplify an intimate and chronic relationship where mistletoes represent protracted stress for hosts, causing long-lasting impact. Although host changes in morphological and reproductive traits due to parasitism are well known, shifts in their physiological system, altering metabolite concentrations, are less known due to the difficulty of quantification. Here, we use ecometabolomic techniques in the plant-plant interaction, comparing the complete metabolome of the leaves from mistletoe (Viscum album) and needles from their host (Pinus nigra), both parasitized and unparasitized, to elucidate host responses to plant parasitism. Our results show that mistletoe acquires metabolites basically from the primary metabolism of its host and synthesizes its own defence compounds. In response to mistletoe parasitism, pines modify a quarter of their metabolome over the year, making the pine canopy metabolome more homogeneous by reducing the seasonal shifts in top-down stratification. Overall, host pines increase antioxidant metabolites, suggesting oxidative stress, and also increase part of the metabolites required by mistletoe, which act as a permanent sink of host resources. In conclusion, by exerting biotic stress and thereby causing permanent systemic change, mistletoe parasitism generates a new host-plant metabolic identity available in forest canopy, which could have notable ecological consequences in the forest ecosystem.
Ajuts:	Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1005 European Commission 610028 Agencia Estatal de Investigación PID2019-110521GB-I00 Agencia Estatal de Investigación CGL2011-29910 Ministerio de Economía y Competitividad BES-2012-057125
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Ecometabolomic ; Mistletoe-host system ; Oxidative stress ; Permanent and systemic effects ; Plant-plant interaction ; Seasonality
Publicat a:	Plant, cell & environment, Vol. 44, Issue 11 (November 2021) , p. 3655-3666, ISSN 1365-3040

DOI: 10.1111/pce.14179

12 p, 2.4 MB

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