Photoperiodic reactions in poinsettia plants. I. On the formation of the inflorescence under continuous short days or long days preceded by temporary short days.

Shimada, T.; Yamada, Y.; Shozaki, T.

Agric. Bull. Saga Univ, 16, 89-104


Accession: 014140448

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Flower bud differentiation was normal in plants of Poinsettia pulcherrima under continuous short-day treatment but was inhibited when long days followed short days. A period of at least 50 short days was necessary to obtain well-developed bracts of a desirable colour.