Responses of Daminozide-treated ‘Delicious’ and ‘Idared’ Apples to Simulated Low-ethylene CA Storage

in Journal of the American Society for Horticultural Science
Author:
F.W. LiuDepartment of Pomology, Cornell University, Ithaca, NY 14853

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Abstract

Daminozide-treated and non treated ‘Delicious’ and ‘Idared’ apples (Malus domestica Borkh.) were stored for 7 to 7.5 months in simulated low-ethylene (<1 μl·liter−1) or normal-ethylene (500 μl·liter1) controlled-atmosphere (CA) storage. The simulated CA storage was a flow-through CA storage in 19-liter jars at 0°C. The storage atmosphere contained 2.5-3% O2, 3% CO2, 94-94.5% N2, and nearly 100% RH. Nontreated ‘Delicious’ and ‘Idared’ apples did not respond to low-ethylene CA, except that low-ethylene CA reduced the incidence of storage scaled on ‘Delicious’ apples. Daminozide-treated ‘Delicious’ apples did not respond to low-ethylene CA; the apples being firm after both low-ethylene and normal-ethylene CA storage. The response to low-ethylene CA by daminozide-treated ‘Idared’ apples was a reduced rate of softening of the apples after storage. The daminozide treatment significantly suppressed the ethylene production of both cultivars of apples in simulated low-ethylene CA storage. Chemical names used: butanedioic acid mono(2,2-dimethylhydrazide)(daminozide).

Contributor Notes

Received for publication 22 July 1985. The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper therefore must be hereby marked advertisement solely to indicate this fact.

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