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    Flowering and Morphology Responses of Greenhouse Ornamentals to End-of-Day Blue-Dominant Lighting with Different Phytochrome Photostationary States by Yun Kong, Qingming Li, David Llewellyn, Youbin Zheng

    Published 2025-07-01
    “…To investigate whether blue-dominant spectra from end-of-day (EOD) lighting can regulate crop morphological and flowering responses, chrysanthemum (<i>Chrysanthemum × morifolium</i>; obligate short day), geranium (<i>Pelargonium × hortorum</i>; day neutral), calibrachoa (<i>Calibrachoa × hybrida</i>; facultative long day), and gerbera (<i>Gerbera jamesonii</i>; facultative short day) plants were grown under different light-emitting diode (LED) spectrum treatments from January to April 2020, in Guelph, Canada. The spectrum treatments were (1) no EOD lighting, (2) narrowband blue from LEDs (B), (3) a combination of narrowband blue, red, and far-red LEDs with a photon flux ratio of 47:3:1 (blue:red:far-red; BRFR). …”
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