Abstract
To search precursors of ethylene in banana fruits, ethylene formation from acetate-2-14C and fumarate-2,3-14C by banana slices was studied. Ethylene-14C formation from acetate-2-l4C was reduced by the addition of malonate or β-hydroxypropionate, and it was enhanced in a sealed chamber in comparison with the case in an aeration chamber. No label of fumarate-2,3-14C was incorporated into ethylene.From these facts it was suggested that acetate-2-14C was incorporated into ethylene via malonate and β-hydroxypropionate. Participation of fumarate in ethylene biosynthesis of banana fruits was ruled out. β-Hydroxypropionate was postulated as an effective precursor of ethylene formation from acetate-2-l4C.
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