Effects of interpolated long days during the short day treatments on the flowering of Chrysanthemum morifolium Ramat

Tanaka, T.

Bulletin of the Faculty of Agriculture, Miyazaki University 26(2): 423-432


ISSN/ISBN: 0544-6066
Accession: 000874606

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Two experiments were performed on C. morifolium cv. Ginpa. In the first experiment plants were subjected to alternating periods of 1, 2 or 3 short days (SD) with 1, 2 or 3 long days (LD) in all 9 possible combinations for 120 days. Flower buds appeared in all cases except 1SD + 1LD and 1SD + 2LD. A higher proportion of SD gave the shortest time to the appearance of flower buds. In the second experiment a treatment of 10 SD was used, during which time 2 or 3 LD were interpolated at various times, and followed by LD treatment. Various types of reproductive morphogenesis were observed and are discussed in terms of a balance of floral stimulus and floral inhibitor at the apex.