Growth and glycyrrhizin contents in Glycyrrhiza uralensis roots cultivated for four years in eastern Nei-Meng-gu of China
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概要
- 論文の詳細を見る
中国において野生甘草(Gancao)の採集が砂漠化を誘発するために2000年に制限する通知が出され,栽培甘草の実用化が強く望まれるようになっている。本研究は,地球環境を保全し甘草資源を確保(野生甘草の不足分を栽培甘草で補填)する観点から企画された。本論文の特徴は,Glycyrrhiza uralensis Fisch.を内蒙古自治区の東部(元宝山区古山鎮西六家村:東北甘草の産地)において栽培した点にある。なお試験植物がG.uralensisであることは,3-4年目の夏に開花した花と果実および小葉の形態から確認した。5月に播種し翌年の5月に苗を堀り上げ根を20-25cmに切りそろえた後,移植した。移植根から新たに生育した4年目の側根(lateralroots)のglycyrrhizin(GL)含量が,日本薬局方の基準値(JPXIV:GLを2.5%以上含む)を越えることが明らかになった。中国の東北甘草の生産地域で栽培されたG.uralensisのGL含量を栽培年数と関連付けて検討したのは,本論文が初めてである。今回の実験によって,栽培甘草が薬用資源として利用できる可能性が高まった。しかしながら,4年目のGL含量(2.81±0.76%)は日本市場の東北甘草(Dongbei-Gancao)の平均値(5.16±1.00%)と比べて満足できる値に達していない。優良種苗の選抜や栽培方法の改良など今後の検討が必要である。この栽培実験と併行して中国の甘草生産地において栽培されたGlycyrrhiza根を調査したところ,JPXIV基準に適合する物は得られなかった。なお,西北地域で蒐集した試料は移植せずに5-6年間栽培された主根(tap-roots)であった。今回我々が実施した栽培実験においてJPXIVの基準に適合したのは,移植後に主根から生育した側根(lateralroots)であった。移植の有無や移植時期が側根の成長やGL含量に及ぼす影響に関しては,現在も内蒙古東部の畑において検討中である。
- 2002-06-20
著者
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TANI Tadato
Department of Pharmacognosy
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YAMAMOTO Yutaka
Department of Pediatrics, Graduate School of Medicine, Gifu University
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Tani T
Toyama Medical And Pharmaceutical Univ. Toyama Jpn
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谿 忠人
和漢薬研究所資源開発研究部門
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山本 豊
株式会社栃本天海堂品質管理部
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TANI Tadato
富山医科薬科大学和漢薬研究所資源開発部門
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Tani Tadato
Department Of Kampo Pharmaceutics Institute Of Natural Medicine Toyama Medical And Pharmaceutical Un
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Tani Tadato
Department Of Kampo Pharmaceutics Institute Of Natural Medicine University Of Toyama:21^<st> C
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Tani Tadato
Department Of Kampo-pharmaceutics Institute Of Natural Medicine University Of Toyama
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Tani Tadato
Department Of Pharmacognosy Institute Of Natural Medicine Toyama Medical And Pharmaceutical Universi
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Tani Tadato
Department Of Pharmacognosy Institute Of Natural Medicine Toyama Medical And Pharmaceutical Universi
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Yamamoto Yutaka
Department Of Applied Analysis And Complex Dynamical Systems Graduate School Of Informatics Kyoto Un
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Yamamoto Yutaka
Department Of Kampo-pharmaceutics Institute Of Natural Medicine Toyama Medical And Pharmaceutical Un
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Yamamoto Yutaka
Department Of Pharmacognosy Institute Of Natural Medicine Toyama Medical And Pharmaceutical Universi
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