Document Detail


Freezing tolerance by vesicle-mediated fructan transport.
MedLine Citation:
PMID:  18619894     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
Ravi Valluru; Willem Lammens; Wilhelm Claupein; Wim Van den Ende
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-07-09
Journal Detail:
Title:  Trends in plant science     Volume:  13     ISSN:  1360-1385     ISO Abbreviation:  Trends Plant Sci.     Publication Date:  2008 Aug 
Date Detail:
Created Date:  2008-08-04     Completed Date:  2008-12-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9890299     Medline TA:  Trends Plant Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  409-14     Citation Subset:  IM    
Affiliation:
Institute for Crop Production and Grassland Research, University of Hohenheim, D-70599 Stuttgart, Germany.
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MeSH Terms
Descriptor/Qualifier:
Adaptation, Physiological / physiology*
Biological Transport / physiology
Freezing*
Fructans / metabolism*
Glycoside Hydrolases / metabolism
Models, Biological
Plants / enzymology,  metabolism
Vacuoles / metabolism
Chemical
Reg. No./Substance:
0/Fructans; EC 3.2.1.-/Glycoside Hydrolases; EC 3.2.1.65/levanase

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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