B-21 Fusicoccane化合物の寄生雑草種子発芽刺激活性における構造要求性

概要

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Fusicoccanes including fusicoccins (FCs), cotylenins (CNs), ophiobolines, and their synthetic analogs were examined for their effects on seed germination of important root parasitic weeds, witch-weed [Striga hermonthica (Del.) Benth] and clover broomrape [Orobanche minor Smith]. Since FCs and CNs carrying different sugar moieties showed similar levels of stimulative activity and, in addition, aglycones were more active than the corresponding parent compounds, aglycones appeared to contain the essential structure for stimulative activity. Furthermore, 9-deoxy-19-hydroxycotylenol was the most active among the compounds tested, indicating that the substituent on the 9-position is not needed for the acitivity. By contrast, the presence of hydroxy group either on the 3- or 12- position seemed to be essential for the activity.
植物化学調節学会の論文
1998-10-01