1993 Fiscal Year Final Research Report Summary
STUDY ON FLOWER-BUD DIFFERENTIATION AND FORCING OF HERBACEOUS PEONY
| Project/Area Number |
04660033
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
園芸・造園学
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| Research Institution | SHIMANE UNIVERSITY |
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Principal Investigator |
AOKI Noriakii SHIMANE UNIVESITY FACULTY OF AGRICULTURE, ASSOCIATE PROFESSOR, 農学部, 助教授 (40032651)
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| Project Period (FY) |
1992 – 1993
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| Keywords | herbaceous peony / flower-bud differentiation / forcing / pre-chilling / cut-flower quality / flowering / GA treatment / chilling period |
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| Research Abstract |
1) The leaf number increased from June 20 to Sept. 28, but no differentiation of bacts was found. Sepals were observed at the first 10 days of Oct, the defferantiation of petals from the middle 10 days of Oct., stamens from the middle 10 days of Nov.and pistils from the last 10 days of November.
2) The longer the chilling period, the longer the length of flower bud was. The earlier the planting date, the earlier the sprouting and flowering were. The number of days from planting to flowering was shortened with increasing chilling period. The cumulative temperature from sprouting to flowering was almost constant regardless of chilling period. The growth of flower buds was accelerated by pre-chilling for 10 days, and some differences were recognized between flower bud of pre-chilling plot and that of control at the end of pre-chilling and chilling. Sprouting, budding and flowering were also accelerated by the pre-chilling.
3)Pre-chilling at 15ﾟC was effectual to advance flowering percentage than that at 8ﾟC.Flowering percentage was advanced by combination of pre-chilling(15ﾟC) and GA treatment. GA treatment just after sprouting was very effectual to advance flowering percentage, but treatments in twice lowered the efficacy. It was recognized that GA treatment tended to lighten the flower color of forced herbaceous peony.
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