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

Research Project

Project/Area Number 05660028
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 園芸・造園学
Research InstitutionShizuoka University

Principal Investigator

OHKAWA Kiyoshi  Shizuoka University Dept.of Biological Science, Professor, 農学部, 教授 (60185204)

Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1994: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1993: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsLeucocoryne / New crop / Flowering control / Growth habit / Dormancy / Low temperature treatment / Chile / Bulbous plant / 新花芽 / リューココリーネ / 生育・開花習性 / チリ自生 / ドロッパー / 花芽分化
Research Abstract

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.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report

URL: 

Published: 1993-04-01   Modified: 2016-04-21  

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