Analysis of supercooling-facilitating (anti-ice nucleation) activity of flavonol glycosides

作者：Kasuga Jun; Fukushi Yukiharu; Kuwabara Chikako; Wang Donghui; Nishioka Atsushi; Fujikawa Emiko; Arakawa Keita; Fujikawa Seizo^*

来源：Cryobiology, 2010, 60(2): 240-243.

DOI：10.1016/j.cryobiol.2009.12.004

• Flavonol glycosides
• Supercooling-facilitating (anti-ice nucleation) activity
• Xylem parenchyma cells
• Deep supercooling

Deep Supercooling Xylem parenchyma cells (XPCs) of katsura tree (Cercidiphyllum japonicum) contain four kinds of flavonol glycosides with high supercooling-facilitating (anti-ice nucleation) activities These flavonol glycosides have very similar structures, but their supercooling-facilitating activities are very different In this study, we analyzed the supercooling-facilitating activities of 12 kinds of flavonol glycosides in order to determine the chemical structures that might affect supercooling-facilitating activity All of the flavonol glycosides tested showed supercooling-facilitating activity, although the magnitudes of activity differed among the compounds It was clear that the combination of the position of attachment of the glycosyl moiety, the kind of attached glycosyl moiety and the structure of aglycone determined the magnitude of anti-ice nucleation activity However, there is still some ambiguity preventing the exact identification of features that affect the magnitude of supercooling-facilitating activity.

• 出版日期2010-4