Isomeric Ratio and Level of Xanthoxin in Tomato Plants Measured by a New Analytical Method

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概要

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• The isomeric ratio and level of natural xanthoxin (XAN) in tomato plants (Lycopersicon esculentum) were examined by a more reliable analytical method than has been reported before. Efforts were made to avoid artificial isomerization between c-XAN and t-XAN throughout the isolation, derivatization and GC-MS procedures. Natural XAN was separated from contaminating chlorophylls before rev. HPLC purification, derivatized to abscisic acid methyl ester (MeABA) in four chemical steps, and quantified with the deuterium-labeled internal standards on clear and reproducible full GC-EI-MS. It was revealed that the isomeric composition of natural XAN was exclusively shifted to c-XAN. The level of c-XAN was higher and more significantly induced by water stress in older plants. The significant role of c-XAN as an ABA biosynthetic precursor is suggested.

• 社団法人日本農芸化学会の論文
• 1997-07-23

著者

• Oritani Takayuki

  Department Of Agricultural Chemistry Faculty Of Agriculture Tohoku University

• Yamamoto Hirotaka

  Department Of Applied Biological Chemistry Faculty Of Agriculture Niigata University

• Yamamoto Hirotaka

  Department Of Applied Biological Chemistry Faculty Of Agriculture Tohoku University:(present Address

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