School of Chemistry, University of Bristol, BS8 1TS., Bristol, U.K..
Planta. 1973 Dec;111(4):347-52. doi: 10.1007/BF00385554.
The presence of abscisic and phaseic acid in a purified acidic extract from flowering plants of the long-short-day plant Bryophyllum daigremontianum [(R. Hamet and Perr.) Berg.] was conclusively established by combined gas chromatography-mass spectrometry (GC-MS) of their methyl esters. Gibberellin A20 (GA20) was identified by GC-MS of the methyl ester and the trimethylsilyl ether of the methyl ester. The following levels of the 3 compounds per kg fresh weight were estimated: Abscisic acid, 5.5 μg; phaseic acid, 9.4μg; gibberellin A20, 0.8 μg. When GA20 and four other GAs were applied to Bryophyllum under shortday conditions, the order of effectiveness for induction of flower formation was: GA2>GA1>GA5=GA7>GA20. The low biological activity of the native GA20 is discussed.
用气相色谱-质谱（GC-MS）对其甲酯进行分析，明确证实了短日照植物落地生根（Bryophyllum daigremontianum [(R. Hamet and Perr.) Berg.]）花中纯化酸性提取物中存在脱落酸和法呢基酸。用甲酯和甲酯的三甲基硅醚的 GC-MS 鉴定出赤霉素 A20（GA20）。每公斤鲜重估计有以下 3 种化合物的含量：脱落酸 5.5μg；法呢基酸 9.4μg；赤霉素 A200.8μg。当 GA20 和其他四种 GA 在短日照条件下施加于落地生根时，诱导花形成的效果顺序为：GA2>GA1>GA5=GA7>GA20。对天然 GA20 的低生物活性进行了讨论。
