国立研究開発法人 国際農林水産業研究センター | JIRCAS

Lavandula*intermedia is a Vernalization Type Plant

JARQ : Japan Agricultural Research Quarterly
ISSN
00213551
書誌レコードID(総合目録DB)
AA0068709X
本文フルテキスト

Lavandula × intermedia is cultivated as an ornamental plant in Japan but its fiowering characteristics have not been elucidated. So, a series of experiments were conducted to determine the infiuence of cold treatment and day length on fiowering. An exposure to a 14-week cold treatment (CT) under natural winter condition induced fiowering. An increasing duration of day length was associated with an increase in fiowering rates and with a decrease in days to the first visible bud (VB) and the first open fiower (FLW). This suggests that L. × intermedia may be an essential quantitative long-day plant. When the plants were treated with a low temperature in a cold room at 5°C, a 10-week CT resulted in perfect fiowering. Plants without CT and plants after a 6-week CT did not initiate fioral buds. An increasing duration of CT was also associated with an increase in the rate of fiowering shoots and with a decrease in days to VB and FLW. Thus, exposure to a period of low temperature is the primary factor promoting fiowering in L. × intermedia. Apical dissections and scanning electron microscope (SEM) observations showed vegetative meristems at the end of a 10-week CT at 5°C. Then, dome formation and sepal initiation of the first fioret of each shoot apex were observed at 7 and 21 days after CT, respectively. This suggests that L. × intermedia is a so-called “after effect” fiowering plant. Thus, we conclude that L. × intermedia is a typical vernalization type plant.

刊行年月2010-01-01
作成者KUBOTA SatoshiMOMOSE HirofumiYONEDA KazuoKOSHIOKA Masaji
著者キーワード

cold treatment

day length

fiowering

公開者Japan International Research Center for Agricultural Sciences
データ作成日2010-01-01
国立情報学研究所メタデータ主題語彙集(資源タイプ)Journal Article
44
1
開始ページ67
終了ページ72
DOI10.6090/jarq.44.67
権利Japan International Research Center for Agricultural Sciences
言語eng