Memorias de investigación
Artículos en revistas:
Metabolomics demonstrates divergent responses of two Eucalyptus species to water stress
Año:2012
Áreas de investigación
  • Fisiología vegetal
Datos
Descripción
Past studies of water stress in Eucalyptus spp. generally highlighted the role of fewer than five ?important? metabolites, whereas recent metabolomic studies on other genera have shown tens of compounds are affected. There are currently no metabolite profiling data for responses of stress-tolerant species to water stress. We used GC?MS metabolite profiling to examine the response of leaf metabolites to a long (2 month) and severe (Wpredawn\-2 MPa) water stress in two species of the perennial tree genus Eucalyptus (the mesic Eucalyptus pauciflora and the semi-arid Eucalyptus dumosa). Polar metabolites in leaves were analysed by GC?MS and inorganic ions by capillary electrophoresis. Pressure?volume curves and metabolite measurements showed that water stress led to more negative osmotic potential and increased total osmotically active solutes in leaves of both species. Water stress affected around 30?40% of measured metabolites in E. dumosa and 10?15% in E. pauciflora. There were many metabolites that were affected in E. dumosa but not E. pauciflora, and some that had opposite responses in the two species. For example, in E. dumosa there were increases in five acyclic sugar alcohols and four lowabundance carbohydrates that were unaffected by water stress in E. pauciflora. Re-watering increased osmotic potential and decreased total osmotically active solutes in E. pauciflora, whereas in E. dumosa re-watering led to further decreases in osmotic potential and increases in total osmotically active solutes. This experiment has added several extra dimensions to previous targeted analyses of water stress responses in Eucalyptus, and highlights that even species that are closely related (e.g. congeners) may respond differently to water stress and re-watering.
Internacional
Si
JCR del ISI
Si
Título de la revista
Metabolomics
ISSN
1573-3882
Factor de impacto JCR
0
Información de impacto
Volumen
8
DOI
10.1007/s11306-011-0299-y
Número de revista
Desde la página
186
Hasta la página
200
Mes
SIN MES
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Participantes
  • Autor: Francisco Javier Cano Martín UPM
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Genética y Fisiología Forestal