Seasonal Variability in Dormancy and Flowering Competence in Chrysanthemum: Chilling impacts on shoot extension growth and flowering capacity

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

Chrysanthemum (Chrysanthemum morifolium Ramat.), an herbaceous perennial short-day plant, shows seasonality in its regulation of shoot extension growth and flowering capacity. To enhance our understanding of the physiological mechanisms of the seasonality in chrysanthemum, we investigated the changes in growth and flowering capacity, and the variation among cultivars. We also evaluated seasonal changes and the response to chilling in shoot extension and flowering capacity in chrysanthemum under controlled environmental conditions (20°C/15°C (light/dark) with a 12-h light period). Both shoot extension and flowering capacity under the subsequent growing conditions were regulated by the temperature of prior growing conditions. After the temperature increased over the summer, chrysanthemums showed a reduced ability for extension growth, and became more difficult to induce flowering. Chilling stimulated the extension growth of shoots when the meristems were entering a dormant state. Chilling had the opposite effect on two regulatory pathways involved in flowering capacity. A pathway related to the meristem dormant state was suppressed by exposure to chilling and induced flowering, and chilling activated an inhibitory regulator in parallel.

刊行年月日
作成者 Tamotsu HISAMATSU Katsuhiko SUMITOMO Michio SHIBATA Masaji KOSHIOKA
著者キーワード

Chrysanthemum morifolium

chilling

flowering

公開者 Japan International Research Center for Agricultural Sciences
データ作成日
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
51
4
開始ページ 343
終了ページ 350
DOI 10.6090/jarq.51.343
権利 Japan International Research Center for Agricultural Sciences
関連するリソース : J-STAGE
言語 eng