Memorias de investigación
Artículos en revistas:
Identification of a homolog of Arabidopsis DSP4 (SEX4) in chestnut: its induction and accumulation in stem amyloplasts during winter or in response to the cold_
Año:2011
Áreas de investigación
  • Ciencias naturales y ciencias de la salud
Datos
Descripción
Oligosaccharide synthesis is an important cryoprotection strategy used by woody plants during winter dormancy. At the onset of autumn, starch stored in the stem and buds is broken down in response to the shorter days and lower temperatures resulting in the buildup of oligosaccharides. Given that the enzyme DSP4 is necessary for diurnal starch degradation in Arabidopsis leaves, this study was designed to address the role of DSP4 in this seasonal process in Castanea sativa Mill. The expression pattern of the CsDSP4 gene in cells of the chestnut stem was found to parallel starch catabolism. In this organ, DSP4 protein levels started to rise at the start of autumn and elevated levels persisted until the onset of spring. In addition, exposure of chestnut plantlets to 4 °C induced the expression of the CsDSP4 gene. In dormant trees or cold-stressed plantlets, the CsDSP4 protein was immunolocalized both in the amyloplast stroma and nucleus of stem cells, whereas in the conditions of vegetative growth, immunofluorescence was only detected in the nucleus. The studies indicate a potential role for DSP4 in starch degradation and cold acclimation following low temperature exposure during activity?dormancy transition
Internacional
Si
JCR del ISI
Si
Título de la revista
Plant, Cell & Environment
ISSN
0140-7791
Factor de impacto JCR
5,215
Información de impacto
Volumen
34
DOI
10.1111/j.1365-3040.2011.02365.x
Número de revista
Desde la página
1693
Hasta la página
1704
Mes
SIN MES
Ranking
12/190 Plant Sciences
Esta actividad pertenece a memorias de investigación
Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Biotecnología de Proteínas Vegetales
  • Grupo de Investigación: Genética y Fisiología Forestal
  • Departamento: Biotecnología