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Página principal > Artículos > Artículos publicados > Root exudate metabolomes change under drought and show limited capacity for recovery |
Fecha: | 2018 |
Resumen: | Root exudates comprise a large variety of compounds released by plants into the rhizosphere, including low-molecular-weight primary metabolites (particularly saccharides, amino acids and organic acids) and secondary metabolites (phenolics, favonoids and terpenoids). Changes in exudate composition could have impacts on the plant itself, on other plants, on soil properties (e. g. amount of soil organic matter), and on soil organisms. The efects of drought on the composition of root exudates, however, have been rarely studied. We used an ecometabolomics approach to identify the compounds in the exudates of Quercus ilex (holm oak) under an experimental drought gradient and subsequent recovery. Increasing drought stress strongly afected the composition of the exudate metabolome. Plant exudates under drought consisted mainly of secondary metabolites (71% of total metabolites) associated with plant responses to drought stress, whereas the metabolite composition under recovery shifted towards a dominance of primary metabolites (81% of total metabolites). These results strongly suggested that roots exude the most abundant root metabolites. The exudates were changed irreversibly by the lack of water under extreme drought conditions, and the plants could not recover. |
Ayudas: | Ministerio de Economía y Competitividad CGL2016-79835 European Commission 610028 European Commission 626234 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1005 |
Derechos: | 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, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
Lengua: | Anglès |
Documento: | Article ; recerca ; Versió publicada |
Publicado en: | Scientific reports, Vol. 8 (August 2018) , art. 12696, ISSN 2045-2322 |
15 p, 1.9 MB |