Studies on the growth habit and control of flowering in Leucocoryne and other bulbous new crop.

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Lcucocoryne coquimbensis is a bulbous plant which originated from Chile and is an attractive new ornamental plant. In this study, the growth habit was studied and methods to control flowering were investigated.During the time of floral anthesis and flower stems harvested in February, the vegetative and floral mcristem for the following year's inflorescense is beginning to be initiated in the bulb. When the primary (1ﾟ) floret initial appears, further development ceases in bulb. Development does not commence again until dormancy is broken, which occurs in mid to late October in Japan. At that time when the 1ﾟ floral pistil of the 1ﾟ inflorescense is completed, which takes place in late November, the carliest floret of the next inflorescense begins. Similarly, 3 to 4 inflorescense develop.Dormancy is borken by temperature between 20ﾟC and 30ﾟC in which 20ﾟC is optimum. Inflorescecse differentiation occurs at 20ﾟC and 25ﾟC.Consequently, the storage at 20ﾟC is optimum to break dormancy and to accelerate the inflorescense differentiation. In our experiment, bulbs were harvested three months after flowers had reached anthesis and were stored at 20ﾟC.Four month were required to break dormancy and for the inflorescense to start development again.Bulbs could be stored for 7 months at 20ﾟC.But the storage for 15 months was too long as the first inflorescense died. This death occurred between 8 months and 15 months. Inflorescense development had been showed at 25ﾟC when compared to 20ﾟC,and death of the inflorescense was delayd.Further, the number of days to anthesis was reduced if bulbs were stored at 5ﾟC or 10ﾟC for 2,4 or 6 weeks after dormancy had been broken and infloresacense differentiation had started.On the contrary, for L.odorota, breaking of dormancy and inflorescense differcutiation occurs at temperature between 15 and 20ﾟC.