短日処理によるローゼルの開花促進

概要

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Rozelle or Jamaica Sorrel, a short-day plant, does not flower under natural conditions of the temperate zone. This experiment, therefore, was carried out on the effect of short-day treatment on flowering. 1) The critical day-length required for flowering and fruiting of Rozelle was considered to be 13 hours. 2) Flower buds were formed by the minimum of five short-day treatments (8 hours each), while flowering required about 20 short-day treatments. 3) In the experiment in which one to five short-day and long-day treatments were alternated, plants receiving only one long-day treatment (natural day length in summer) in each two-to five-day period flowered (Table 2), and the time of first flowering was accelerated as the rate of short-day treatment increased. Two or more successive long-day treatments prevented flowering, except in a series of 5-short-2-long treatment, in which case no fruit-setting was observed, however. When the number of long-day treatment equaled or exceeded that of short-day treatment, no flower buds were observed to appear.
神戸大学の論文