Identification of myo-inositol as a major carbohydrate in kiwifruit, Actinidia deliciosa

被引:22
作者
Bieleski, RL
Clark, CJ
Klages, KU
机构
[1] Hort. Food Res. Inst. of New Zealand, Auckland
关键词
Actinidia deliciosa; Actinidiaceae; kiwifruit; isomeric form of inositol; myoinositol; fruit development; fruit sugars;
D O I
10.1016/S0031-9422(97)00266-5
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Kiwifruit plants contain unusually high levels of inositol at 20% of total soluble carbohydrate in the leaves through the season, and up to 40% of total soluble carbohydrate in parts of the fruit during mid-development. Fruit inositol content falls to 1-2% at full ripeness, mainly through large increases in the sugars rather than inositol utilisation. Kiwifruit inositol was purified by Ca++-complexation chromatography and was obtained as a crystalline product. It was optically inactive, gave a C-13 NMR pattern identical to authentic inositol, and the same reaction rates as myo-inositol (but not other isomers) with myo-inositol dehydrogenase. We conclude that inositol is present in kiwifruit as the myo-isomer, and discuss its possible significance in kiwifruit physiology. (C) 1997 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:51 / 55
页数:5
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