Abstract
On 15 Sept., 15 Oct., 15 Nov., and 15 Dec., summer-rooted cuttings of Euonymus fortunei (Turcz.) Hand.-Mazz. `Emerald Gaiety' from both outdoor (natural cold exposure) and greenhouse (no natural cold exposure) locations were transferred to ambient, 16-h incandescent or a 16-h high-pressure sodium (HPS) lighting treatment in a greenhouse 10C). Regardless of lighting treatment, cuttings transferred from outdoors in December had the most shoot growth, followed by cuttings transferred in November. None of the lighting treatments induced a resumption of growth at any transfer date. After 15 days of storage at 1C, outdoor and/or greenhouse-grown cuttings that previously had not received any or partial amounts of natural cold exposure broke dormancy under ail lighting treatments and grew to similar heights as those of the December transfer date. Storage at 1C for 30 days inhibited growth compared to storage for 15 days. The degree of inhibition was greatest for plants exposed to HPS lighting.
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