Flower bud formation - Kaga Keisei (English spelling) flower‐bud formation

Japanese: 花芽形成 - かがけいせい（英語表記）flower‐bud formation

In the shoot apex of flowering plants, buds and leaves are produced one after another during the vegetative growth period, but as the day length changes, the differentiation transition from vegetative growth to reproductive growth, that is, from bud formation to flower bud formation, occurs. There are three types of plants: short-day plants (rice, chrysanthemum, cocklebur, morning glory, etc.), which form flower buds when the day length shortens, long-day plants (wheat, barley, spinach, radish, etc.), which do not form flower buds unless the day length increases, and neutral-day plants (tomato, buckwheat, cucumber, kidney bean, etc.), which form flower buds regardless of the day length.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

顕花植物の茎頂では，栄養生長の期間中は芽や葉が次々と生産されているが，日長の変化に応じて栄養生長から生殖生長，つまり芽の形成から花芽の形成への分化転換がおこる。日長が短くなると花芽形成がおこる短日植物(イネ，キク，オナモミ，アサガオなど)，日長が長くならなければ花芽形成がおこらない長日植物(コムギ，オオムギ，ホウレンソウ，ダイコンなど)，日長とは無関係に花芽形成をおこす中日植物(トマト，ソバ，キュウリ，インゲンマメなど)の三つのタイプがある。

出典　株式会社平凡社世界大百科事典第２版について　情報

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