The Flowering Response of Coleus in Relation to Photoperiod and the Circadian Rhythm of Leaf Movement

作者：Ruth Halaban · 发表于：PLANT PHYSIOLOGY · 年份：1968 · DOI：10.1104/pp.43.12.1894 · 被引用次数：30 · 研究领域：Botanical Research and Applications、Plant and animal studies、Plant Diversity and Evolution

The flowering response of Coleus frederici and Coleus blumei x C. frederici is dependent on the photoperiod; both plants have a critical day length of about 12 hr. The inductive phase, defined as the period when light signals inhibit floral development, started 10 hr after the onset of darkness under 4 and 8-hr photoperiods, and 8 hr after the onset of darkness under a 12-hr photoperiod. However, a fixed temporal relationship between the inductive phase and the minimum leaf position was observed for Coleus frederici. The inductive phase always started 5 hr after the minimum leaf position. This evidence supports the theory that a circadian clock participates in the time measurement process of photoperiodic floral induction.