Day-extension Blue Light Inhibits Flowering of Chrysanthemum When the Short Main Photoperiod Includes Far-red Light
نویسندگان
چکیده
Chrysanthemum ( × morifolium ) is a common ornamental crop with qualitative short-day flowering response. Extending short day moderate blue [B (400–500 nm)] light inhibits in greenhouse conditions sunlight but does not indoors (without sunlight) under B + red [R (600–700 or white light. We postulated that the contrasting responses to as extension depended on far-red [FR (700–800 during day, which plentiful lacking B+R light-emitting diodes. To study this response three chrysanthemum cultivars, we delivered indoor lighting treatments at two locations an 11-hour main photoperiod of B, green [G (500–600 nm)], R, and FR light, where subscript values indicate photon flux density (in µmol·m −2 ·s −1 each waveband: 60 R 120 , G . After photoperiod, plants received 0 4 hours day-extension (B ). Under all except it took ‘Chelsey Pink’, ‘Gigi Gold’, Yellow’ 13 17 days reach first visible inflorescence 42 51 open flower. In contrast, grown 41 67 few developing flowers. Plants were tallest flower after 9 weeks when These results inclusion necessary for inhibit chrysanthemum. On basis these those other studies, postulate spectral dependence depends whether how phytochrome photoequilibrium changes day. particular, sufficiently high daytime (e.g., B+G+R light) could establish predominant mode floral signaling prevents perception subsequent long
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ژورنال
عنوان ژورنال: Journal of the American Society for Horticultural Science
سال: 2023
ISSN: ['0003-1062', '2327-9788']
DOI: https://doi.org/10.21273/jashs05294-23