Control of flowering and bulb maturation in Dendrobium by uniconazol.

1999 Fiscal Year Final Research Report Summary

• Project/Area Number: 10660027
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: 園芸・造園学
• Research Institution: Kagawa University
• Principal Investigator: GOI Masanori Kagawa University, Faculty of Agriculture, Professor, 農学部, 教授 (30035993)
• Co-Investigator(Kenkyū-buntansha): HASEGAWA Atsushi Kagawa University, Faculty of Agriculture, Professor, 農学部, 教授 (70036044) ; FUKAI Seiichi Kagawa University, Faculty of Agriculture, Professor, 農学部, 教授 (80228858)
• Project Period (FY): 1998 – 1999
• Keywords: Dendrobium / Anti-gibberellin / uniconazole

Research Abstract

Uniconazole was used as foliar spray on Dendrobium X Pink Doll Elegance and Yukidaruma King to control height and bulb maturation. When 12.5mg/l uniconazole was applied twice on the new shoots (lead bulb), the plant height and number of leave decreased, on the otherhand stem daiamter increased. Flowering of the treated plants was delayed with lower numbers of florets. The result suggested that maturation of the lead bulb was delayed by uniconazole treatment. Plants treated with uniconazole at earlier stage produced shorter shoots in the following year. No delay of flowering was observed in the following year.