Freezing tolerance by vesicle-mediated fructan transport

Valluru, Ravi, Lammens, Willem, Claupein, Wilhelm and Van den Ende, Wim (2008) Freezing tolerance by vesicle-mediated fructan transport. Trends in Plant Science, 13 (8). pp. 409-414. ISSN 1360-1385

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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.

Keywords:Fructans, freezing tolerance, vesicle-mediated transport
Subjects:D Veterinary Sciences, Agriculture and related subjects > D400 Agriculture
Divisions:College of Science > Lincoln Institute for Agri-Food Technology
ID Code:42738
Deposited On:27 Oct 2020 14:25

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