Calystegine distribution in potato (Solanum tuberosum) tubers and plants

被引：47

作者：

Keiner, R ^{[1
]}

Dräger, B ^{[1
]}

机构：

[1] Univ Halle Wittenberg, Inst Pharmaceut Biol, D-06120 Halle, Germany

来源：

PLANT SCIENCE | 2000年 / 150卷 / 02期

关键词：

potato; Solanum tuberosum; calystegine accumulation; tropane alkaloid biosynthesis; tropinone reductase;

D O I：

10.1016/S0168-9452(99)00184-3

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：

Potato plants contain calystegines in leaves, stems, flowers, fruits and roots. Calystegines A(3) and B-2 are the main constituents. Highest concentrations were measured in sprouts emerging from the tubers. In 3 mm long sprouts, 3.3 mg total calystegines per g fresh mass were detected. Dormant tubers directly after harvest contain less calystegines in all parts than sprouting tubers. Flowers and young leaves are the aerial plant tissues with the highest calystegine concentration, i.e. 150 mu g total calystegines per g fresh mass. Calystegine levels did not rise when sprouts were wounded. Tropinone application to sprouts and aerial tissues lead to an accumulation of pseudotropine and not to tropine. That indicates that stereospecific tropinone reduction is active in potato. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved.

引用

页码：171 / 179

页数：9

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