HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Agriculture / Faculty of Agriculture >
Peer-reviewed Journal Articles, etc >

High accumulation of soluble sugars in deep supercooling Japanese white birch xylem parenchyma cells.

Files in This Item:
NP174-3.pdf1.14 MBPDFView/Open
Please use this identifier to cite or link to this item:

Title: High accumulation of soluble sugars in deep supercooling Japanese white birch xylem parenchyma cells.
Authors: Kasuga, Jun Browse this author
Arakawa, Keita Browse this author
Fujikawa, Seizo Browse this author
Issue Date: May-2007
Publisher: Blackwell Publishing
Journal Title: New Phytologist
Volume: 174
Issue: 3
Start Page: 569
End Page: 579
Publisher DOI: 10.1111/j.1469-8137.2007.02025.x
PMID: 17447912
Abstract: • Seasonal changes in the accumulation of soluble sugars in extracellular freezing cortical parenchyma cells and deep supercooling xylem parenchyma cells in Japanese white birch (Betula platyphylla var. japonica) were compared to identify the effects of soluble sugars on the mechanism of deep supercooling, which keeps the liquid state of water in cells under extremely low temperatures for long periods. • Soluble sugars in both tissues were analyzed by high-performance liquid chromatography (HPLC), and the concentrations of sugars in cells were estimated by histological observation of occupancy rates of parenchyma cells in each tissue. Relative and equilibrium melting points of parenchyma cells were measured by differential thermal analysis and cryoscanning electron microscopy, respectively. • In both xylem and cortical parenchyma cells, amounts of sucrose, raffinose and stachyose increased in winter, but amounts of fructose and glucose exhibited little change throughout the entire year. In addition, no sugars were found to be specific for either tissue. Combined results of HPLC analyses, histological observation and melting point analyses confirmed that the concentration of sugars was much higher in xylem cells than in cortical cells. • It is thought that the higher concentration of soluble sugars in xylem cells may contribute to facilitation of deep supercooling in xylem cells by depressing the nucleation temperature.
Rights: The definitive version is available at
Type: article (author version)
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 藤川 清三

Export metadata:

OAI-PMH ( junii2 , jpcoar_1.0 )

MathJax is now OFF:


 - Hokkaido University