Implications of mistletoe parasitism for the host metabolome: A new plant identity in the forest canopy

0551764 - ÚVGZ 2022 RIV GB eng J - Článek v odborném periodiku
Lazaro-González, A. - Gargallo-Garriga, A. - Antonio Hodar, J. - Sardans, J. - Oravec, Michal - Urban, Otmar - Penuelas, J. - Zamora, R.
Implications of mistletoe parasitism for the host metabolome: A new plant identity in the forest canopy.
HOBOKEN: WILEY, 2021. Plant Cell and Environment. Roč. 44, č. 11 (2021), s. 3655-3666. ISSN 0140-7791. E-ISSN 1365-3040
Grant CEP: GA MŠMT(CZ) EF16_019/0000797
Institucionální podpora: RVO:86652079
Klíčová slova: amino-acid-sequence * caterpillar thaumetopoea-pityocampa * xylem-tapping mistletoes * viscum-album l * specialist herbivore * iridoid glycosides * vertical gradients * pine * generalist * responses * ecometabolomic * mistletoe-host system * oxidative stress * permanent and systemic effects * plant-plant interaction * seasonality
Obor OECD: Plant sciences, botany
Impakt faktor: 7.947, rok: 2021
Způsob publikování: Open access
https://onlinelibrary.wiley.com/doi/10.1111/pce.14179

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.
Trvalý link: http://hdl.handle.net/11104/0326987