Effect of Low Light Intensity on Longevity of Flowering on Bedding Plants Targeted for Indoor Use

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

The adaptability of nine bedding plants to low light intensity was evaluated for their indoor use. Based on the duration of flowering under indoor low light intensity [1,000 lx, 16.8 μmol・m-2・s-1 photosynthetic photon flux density (PPFD)], the plants’ adaptability was classified into three groups. In group 1, the effect of low light intensity was unclear due to short flowering longevity irrespective of light intensity; this group included Helianthus. Group 2 included species not adaptable to indoor low light intensity, under which the duration of flowering indoors was less than three weeks; this group included Petunia Salvia, and Verbena. Group 3 included species adaptable to indoor conditions, under which the duration of flowering was longer than three weeks; this group included Catharanthus, Impatiens, Tagetes, Torenia and Zinnia. The effect of low light intensity on shoot growth did not appear as a reduction in plant width, but did appear in plant height and length of the longest lateral stem. The leaf color of most species was darkened by low light intensity. Even Catharanthus, Torenia and Zinnia, which showed the highest adaptability to low light intensity, could not maintain sufficient ornamental quality under 8.4 μmol・m-2・s-1 PPFD. The duration of flowering became longer as light intensity increased, although the response differed among species. In Torenia and Zinnia, the duration of flowering was extended under 2,500 lx (42.0 μmol・m-2・s-1 PPFD), indicating that longterm use was possible under bright indoor conditions, including at such locations as windowsills and showcases.

刊行年月日
作成者 Tatsuo OKAZAWA Takaaki NISHIJIMA
著者キーワード

flower diameter

indoor environment

number of flowers

weak light

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
3
開始ページ 279
終了ページ 286
DOI 10.6090/jarq.51.279
権利 Japan International Research Center for Agricultural Sciences
関連するリソース : J-STAGE
言語 eng