Inhibition of ethylene production and 1-aminocyclopropane-1-carboxylate oxidase activity by tropolones
1998
Mizutani, F. | Rabbant, A.B.M.G. | Akiyoshi, H.
The effect of tropolone and hinokitiol on C2H4 production and in vitro ACC oxidase activity was examined by using apple fruit plugs. Application of aqueous tropolone and hinokitiol solution inhibited C2H4 production, but the addition of Fe2+ in the solution alleviated the inhibition. Gaseous tropolone and hinokitiol were also effective in suppressing C2H4 production, but the suppression was annulled when apple plugs were pretreated with Fe2+. Tropolone and hinokitiol inhibited in vitro ACC oxidase activity, which was recovered by adding Fe2+ in the assay medium. Therefore part of inhibition of C2H4 production by these tropolones was due to their chelating action of Fe2+, which is essential for the activation of ACC oxidase.
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