溫度對繡球花花芽形成之影響

Effects of Temperature on Flower Formation of Hydrangea macrophylla 'Leuchtfeuer'

葉德銘(Der-Ming Yeh) ； 江秀紅(Hsiu-Hung Chiang)

《中國園藝》 49卷2期 (2003/06) Pp. 211-220

https://doi.org/10.6964/JCSHS.200306.0211

摘要

於人工氣候室與梅峰（海拔2100公尺）研究溫度對繡球花花芽形成之影響，以建立繡球花在台灣本土之花期調節基礎資料。於人工氣候室15/13℃處理24天後，植株莖頂已達分化五個花序原體階段。而20/15℃處理者，已分化五個花序原體或進入花序原體產生分枝階段。於78天後，25/20℃處理者僅有20%的植株進入花芽創始階段，30/25℃處理之植株仍處於營養生長。南投縣魚池鄉業者於1997年七月上旬運至梅峰高冷地之植株，經15-39天後花芽已創始。桃園縣新屋鄉業者於2001年七月將植株運至梅峰，結果植株經50-60天後花芽已創始；於八月運達者，經63-74天後達花芽創始階段。營養生長之繡球花的莖頂發育階段和莖頂直徑呈線性相關，當莖頂直徑爲0.32-0.46 mm時，始迅速膨大並分化花序原體。

關鍵字

繡球花 ； 花芽形成 ； 溫度 ； 莖頂直徑

並列摘要

Effect of temperature on flower formation of Hydrangea macrophylla 'Leuchtfeuer' was studied in phytotron and Mei-feng highland field conditions in order to establish the information of regulation of flowering in hydrangeas in Taiwan. After the 15/13℃ treatment for 24 days, the hydrangeas had initiated five primary inflorescence primordia, while the 20/15℃-treated plants had initiated both primary and secondary inflorescence primordia. After treatments for 78 days, 20% of the 25/20℃-treated plants had initiated inflorescences, while all of the 30/25℃-treated plants remained vegetative growth. Hydrangeas, supplied by a grower at Yu-Chih area in Nantu, had initiated inflorescences in 15 to 38 days after plants' transferring to Mei-Feng in July 1997. Hydrangeas, supplied by a grower at Hsin-Wuhr area in Taoyuan, had initiated inflorescences in 50 to 69 days after transferring to Mei-feng in July, and in 63 to 74 days for those transferring in August 2001. Shoot apical diameter (＜0.32-0.46 mm) was linearly related to the shoot developmental stage in the phytotron or highland field-grown vegetative plants, but after inflorescence initiation, the shoot apical diameter expanded rapidly.

並列關鍵字

Hydrangea ； flower formation ； temperature ； shoot apical diameter