Blue-light promotion of flowering is absent in hy4 mutants of Arabidopsis

被引:11
作者
Bagnall, DJ [1 ]
King, RW [1 ]
Hangarter, RP [1 ]
机构
[1] INDIANA UNIV,DEPT BIOL,BLOOMINGTON,IN 47405
关键词
Arabidopsis (mutant); blue-light photoreceptor; cryptochrome; flowering (late); mutant (hy4); photoperiod;
D O I
暂无
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
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.
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页码:278 / 280
页数:3
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