Ethephon applied to peach (Prunus persica L. cv. Andross) and French prune (Prunus domestica L. cv. Agen) at fruit developmental stages sensitive to ethylene-induced abscission reduced peach enlargement and the 14C-IAA transport capacities of excised peach pedicel segments. Sensitivity to (2-chloroethyl)phosphonic acid (ethephon) was inversely related to peach size prior to treatment. Triiodobenzoic acid (TIBA) increased abscission of control and ethephon-treated prunes. Accumulation of label by fruit tissues of ethylene pretreated prune explants following xylem transport of 14C-sugar was reduced despite the absence of competing sinks and continued availability of sugar. These results provide evidence of a direct effect of ethylene on fruit tissues.
Chemical thinning: ethylene and pre treatment fruit size influence enlargement, auxin transport, and apparent sink strength of French prune and 'Andross' peach
GIULIVO, CLAUDIO;RAMINA, ANGELO
1977
Abstract
Ethephon applied to peach (Prunus persica L. cv. Andross) and French prune (Prunus domestica L. cv. Agen) at fruit developmental stages sensitive to ethylene-induced abscission reduced peach enlargement and the 14C-IAA transport capacities of excised peach pedicel segments. Sensitivity to (2-chloroethyl)phosphonic acid (ethephon) was inversely related to peach size prior to treatment. Triiodobenzoic acid (TIBA) increased abscission of control and ethephon-treated prunes. Accumulation of label by fruit tissues of ethylene pretreated prune explants following xylem transport of 14C-sugar was reduced despite the absence of competing sinks and continued availability of sugar. These results provide evidence of a direct effect of ethylene on fruit tissues.Pubblicazioni consigliate
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