Abstract:The effect of light quality on the extension growth of tulips was investigated for 4 tulip (Tulipa gesneriana) cultivars "Leen van der mark," "Murasaki suisho," "Come back," and "Kikomachi." The exposure of tulips to ultraviolet-A (UV-A), blue (B), red (R) or far-red (FR) fluorescent tubes throughout the entire night (a process called "night lighting") was found to promote lengthening of the stem and first internode of plants grown under natural photoperiod conditions in a greenhouse. The effectiveness of FR n… Show more
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