カタヒラ リコ   KATAHIRA Riko
  片平 理子
   所属   人間科学部 食物栄養学科
   職種   教授
言語種別 英語
発行・発表の年月 2012/11/01
形態種別 研究論文(学術雑誌)
査読 査読あり
標題 Comparison of the formation of nicotinic acid conjugates in leaves of different plant species.
執筆形態 共著
掲載誌名 Plant Physiol Biochem
掲載区分国外
巻・号・頁 60,pp.190-195
著者・共著者 Ashihara H, Yin Y, Katahira R, Watanabe S, Mimura T, Sasamoto H
概要 The metabolism of [carbonyl-(14)C]nicotinamide was investigated in leaves of 23 wild plant species. All species readily converted nicotinamide to nicotinic acid, and only a fraction of nicotinic acid was utilised for NAD and NADP synthesis. The remaining nicotinic acid is converted to the nicotinic acid conjugates. Only one plant species, Cycas revoluta, produced both nicotinic acid N-glucoside and trigonelline; the other 22 species produced one or other of the conjugates. The diversity of nicotinic acid conjugate formation in plants is discussed using these results and our previous investigation involving a few model plants, various crops and ferns. Nicotinic acid N-glucoside formation was restricted mostly to ferns and selected orders of angiosperms, whereas other plants produce trigonelline. In most cases the formation of both nicotinic acid conjugates is incompatible, but some exceptions have been found.