Blue-light promotion of flowering is absent in hy4 mutants of Arabidopsis
- 1 October 1996
- journal article
- Published by Springer Nature in Planta
- Vol. 200 (2), 278-280
- https://doi.org/10.1007/bf00208319
Abstract
Loss of a blue-light photoreceptor in the hy4 mutants of Arabidopsis thaliana (L.) Heynh substantially delayed flowering (>100 d to flower vs. 40–50 d), especially with blue light exposure from lamps lacking much red (R) and/or far-red (FR) light. Red night breaks were promotory but flowering was still later for the hy4-101 mutant. However, with exposure to light from FR-rich lamps, flowering of all mutants was early and no different from the wild type. Thus, flowering of Arabidopsis involves a blue-light photoreceptor and other, often more effective photoreceptors. The latter may involve phytochrome photoresponses to R and FR, but with little or no phytochrome response to blue wavelengths.Keywords
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