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Memorias de investigación
Artículos en revistas:
Osmotic adjustment is a significant mechanism of drought resistance of Pinus pinaster and Pinus canariensis.
Año:2009
Áreas de investigación
  • Fisiología vegetal
Datos
Descripción
Mechanisms of drought resistance were studied in two xeric populations of Pinus canariensis and Pinus pinaster. Seedlings were grown in a hydroponic culture for four months. Gradual controlled drought was imposed during two weeks by adding Polyethylene glycol (PEG-6000) to the growing medium. Two levels of water deficit (Psi = -1MPa, Psi = -2 MPa) and a control treatment (Psi = -0.03 MPa) were tested. Relative water content (RWC) was markedly low at the end of the experiment. Both populations showed a high capacity for osmotic adjustment in needles as shown by the osmotic index, 0.63 (1.33 MPa at 80% RWC) for P. canariensis and 0.54 (1.25 MPa at 80% RWC) for P. pinaster. Root growth and root:shoot (stem + needles) ratio were increased by water deficit. Opposite patterns of relative biomass allocation were assessed between stressed and control plants. While stressed seedlings assigned more dry matter to roots, non-stressed plants showed a higher relative needle weight. The growing media caused additional stress to the plants, thus comparisons with other drought protocols should be made carefully.
Internacional
Si
JCR del ISI
Si
Título de la revista
SPANISH JOURNAL OF AGRICULTURAL RESEARCH
ISSN
1695-971X
Factor de impacto JCR
0,388
Información de impacto
Volumen
18
DOI
Número de revista
2
Desde la página
159
Hasta la página
166
Mes
AGOSTO
Ranking
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Participantes
  • Autor: Rosa Ana Lopez Rodriguez (UPM)
  • Autor: Ismael Aranda García (UPM)
  • Autor: Luis Alfonso Gil Sanchez (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Genética y Fisiología Forestal
  • Departamento: Silvopascicultura
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