Photothermal Induction of Flower Head Formation in Broccoli Plants

DOI JASI Web Site Web Site 3 Citations 4 References Open Access

Bibliographic Information

Other Title
  • ブロッコリーの花らい形成における温度と日長の相乗作用
  • ブロッコリー ノ カライ ケイセイ ニ オケル オンド ト ニッチョウ ノ

Search this article

Description

Effects of growing temperatures (17°C-23°C) and day lengths (8 hours day length and 16 hours day length) on floral development was investigated. Thirteen broccoli cultivars differing in earliness of flower head formation were used.<br>1. Two extremely early cultivars (‘Gokuwase-midori’ and ‘Green Comet’), three early cultivars (‘Shaster’, ‘Ryoku-yo’ and ‘Sato-midori’), and an intermediate cultivar (‘Ryoku-zan’), did not form flower heads under short-day conditions at temperatuers of about 20°C, but they formed flower heads long-day conditions at the same temperature.<br>2. Two extremely early cultivars (‘Gokuwase-midori’ and ‘Dark Horse’), three early cultivars (‘Wase-midori’, ‘Shaster’ and ‘Ryoku-yo’), and an intermediate cultivar (‘Three Seven’), formed flower heads one week earlier under long-day conditions than short-day conditions at arund 17°C.<br>3. When two early cultivars (‘Wase-midori’ and ‘Shaster’), and two intermediate cultivars (‘Ryoku-rei’ and ‘Three Seven’), formed flower heads at temderatures of about 17°C, the number of leaves to flower heads was smaller under long days than under short days.<br>4. From these results, it may be considered that the low temperature treatment under long-day conditions promotes flower head formation more effectively than the same treatment under short-day conditions, and the temperature for photother mal induction is somewhat higher than for thermoinduction. As for photothermal induction of flower head formation in broccoli plants, it is estimated that low temperature treatment is more effective than long-day treatment.

Journal

Citations (3)*help

See more

References(4)*help

See more

Details 詳細情報について

Report a problem

Back to top