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The Metabolism of(2-^(14)C) Mevalonic Acid on Photoperiodic Induction in Grafted Solanum andigena

원자력학회지 1970년 2권 2호 p.73 ~ 84
Bae Moo, E.I. Mercer,
소속 상세정보
 ( Bae Moo ) - Korea Institute of Science and Technology
 ( E.I. Mercer ) - University Colledge of Wales Department of Bischemistry

Abstract


The metabolism of sterol precurosor in leaves of Solanum andigena grafted between photoinduced and noninduced plant was investigated with the use of (2-14C) mevalonic acid. By the technique of the preparative gas-liquid chromato­graphy, radioactive compounds of squalene, 4,4´-dimethylsterols and 4-demethyl­sterol were isolated and determined quantitatively. When labeled mevalonic acid was applied to leaves radioactivity was extensively incorporated into non­saponifiable materials of lipid fraction and aqueous fraction (ethanol-water fraction). Radioactivity of 14C derived from (2-14C) mevalonic acid was trans­missible from photoinduced plant to non-induced plant across the graft union, as tuberization hormone was, and incorporated into the sterols of the non-i ducQd plant. Inhibitors of sterol biosynthesis, SK & F 7997 and nicotinic acid, are effective suppressors of tuber growing, if applied to leaves during photoinduction period. The experimental results suggest that certain substance containing isoprene unit, or sterol-like compound may participate in tuber growing.

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