A Glycolipid Involved in Flower Bud Formation of Arabidopsis thaliana

一種糖脂涉及阿拉伯芥之花芽形成

Yosuke Hisamatsu ； Nobuharu Goto ； Koji Hasegawa ； Hideyuki Shigemori

《Botanical Studies》 47卷1期 (2006/01) Pp. 45-50

摘要

我們追尋阿拉伯芥(Arabidopsis thaliana)涉及花芽形成之生理活性物質。比較花芽形成－及未發芽形成－之發育階段的抽取液於HPLC檢測時發現前者有下降之若干峯值。化合物1，此乃減少最明顯之峯值，係單離自阿拉伯芥之地上部。從核磁共振儀及質譜儀之數據得知化合物1乃單半乳糖－雙酸甘油(MGDG)。當阿拉伯芥暴露於長日照只一天時，添加化合物1可誘導花芽形成。這些結果顯示：化合物1 可能為花芽形成物質之前驅體或基質，因此乃阿拉伯芥花芽形成之一重要成份。

關鍵字

花芽形成 ； 阿拉伯芥 ； 短日照 ； 長日照 ； 單半乳糖－雙酸甘油 ； 生理活性物質

並列摘要

We searched for bioactive substances involved in flower bud formation of Arabidopsis thaliana. Some significantly decreasing HPLC peaks were detected in the extract of flower buds-forming A. thaliana compared with that of the non-flower bud-forming stage. Compound 1, which corresponded to the most decreased HPLC peak, was isolated from aerial parts of A. thaliana. From NMR and MS data, compound 1 was identified as one of the monogalactosyl diacylglyceride (MGDG). Compound 1 induced flower bud formation of A. thaliana exposed to long day condition for only 1 day. These results suggest that compound 1 as a precursor or a substrate of flower bud-forming substances plays important roles in the flower bud formation of A. thaliana.

並列關鍵字

Arabidopsis thaliana ； Bioactive substance ； Flower bud formation ； Long day condition ； MGDG ； Short day condition