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Root exudate metabolomes change under drought and show limited capacity for recovery
Gargallo-Garriga, Albert (Centre de Recerca Ecològica i Aplicacions Forestals)
Preece, Catherine (Centre de Recerca Ecològica i Aplicacions Forestals)
Sardans i Galobart, Jordi (Centre de Recerca Ecològica i Aplicacions Forestals)
Oravec, Michal (The Czech Academy of Sciences. Global Change Research Institute)
Urban, Otmar (The Czech Academy of Sciences. Global Change Research Institute)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)

Date: 2018
Abstract: 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.
Note: Número d'acord de subvenció MINECO/CGL2016-79835
Note: Número d'acord de subvenció EC/FP7/610028
Note: Número d'acord de subvenció EC/FP7/626234
Note: Número d'acord de subvenció AGAUR/2017/SGR-1005
Rights: 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. Creative Commons
Language: Anglès.
Document: article ; recerca ; publishedVersion
Published in: Scientific Reports, Vol. 8 (August 2018) , art. 12696, ISSN 2045-2322

DOI: 10.1038/s41598-018-30150-0
PMID: 30140025


15 p, 1.9 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals) > Imbalance-P
Articles > Research articles
Articles > Published articles

 Record created 2018-09-24, last modified 2018-10-20



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