Freezing tolerance by vesicle-mediated fructan transport.
Trends Plant Sci
; 13(8): 409-14, 2008 Aug.
Article
en En
| MEDLINE
| ID: mdl-18619894
ABSTRACT
Fructans are fructose-based polymers associated with freezing tolerance. They might act directly via membrane stabilization or indirectly by stimulating alternative cryoprotectants. Fructans and fructan biosynthetic enzymes, in general, are believed to be present in the vacuole. This paper draws particular attention to the surprising presence of fructans and fructan exohydrolase activity in the apoplast of cold-stressed plants. This observation raises questions concerning the origin of apoplastic fructans and suggests that fructans are transported to the apoplast by post-synthesis mechanisms, perhaps induced by cold. We propose a conceptual vesicle-mediated transport model for the movement of vacuolar fructans to the apoplast, where they could assist in stabilizing the plasma membrane.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Adaptación Fisiológica
/
Congelación
/
Fructanos
Idioma:
En
Revista:
Trends Plant Sci
Asunto de la revista:
BOTANICA
Año:
2008
Tipo del documento:
Article
País de afiliación:
Alemania