Implications of mistletoe parasitism for the host metabolome: A new plant identity in the forest canopy
Metadatos
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Wiley-Blackwell Publishing
Materia
Ecometabolomic Mistletoe-host system Oxidative stress Permanent and systemic effects Plant-plant interaction Seasonality
Fecha
2021-09-06Referencia bibliográfica
Lázaro-González, A... [et al.] (2021). Implications of mistletoe parasitism for the host metabolome: A new plant identity in the forest canopy. Plant, Cell & Environment, 1– 12. [https://doi.org/10.1111/pce.14179]
Patrocinador
Catalan Government SGR 2017-1005; European Research Council Synergy IMBALANCE-P ERC-2013-SyG-610028; Instituto de Salud Carlos III Spanish Government European Commission CLAVINOVA CGL2011-29910; ELEMENTALSHIFT PID2019-110521GB-I00; Ministerstvo Skolstvi, Mladeze a Telovychovy SustES CZ.02.1.01/0.0/0.0/16_019/0000797; Secretaria de Estado de Investigacion, Desarrollo e Innovacion BES-2012-057125Resumen
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 topdown
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.