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有读书笔记Blue-light promotion of flowering is absent in hy4 mutants of Arabidopsis

1 liuxin 添加于 2010-4-26 17:45 | 1818 次阅读 | 0 个评论
  •  作 者

    Bagnall DJ, King RW, Hangarter RP
  •  摘 要

    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.
  •  详细资料

    • 文献种类: Journal Article
    • 期刊名称: Planta
    • 期刊缩写: Planta
    • 期卷页: 1996  200 2
    • ISBN: 0032-0935
  • 学科领域 生物医药 » 生物学

  • 相关链接 DOI URL 

  •  liuxin 的文献笔记  订阅

    【原创】Koorrmeef(1980)获得了一批丧失或削弱部分光谱反应的拟南芥突变体。作者进一步在拟南芥hy4突变体中首次分离出了hy4基因。hy4是光形态建成突变体,影响与开花有关的基因的表达。在拟南芥中,在长日照的条件下更易开花而且连坐叶形成的更少。为了比较不同波长的光对开花的作用,进行了NI试验,90分的NI对开花的促进效应与长时间的光照效果一样,光敏色素突变株并没有NI试验造成的影响,说明是通过蓝光的光受体而不是光敏色素调控了拟南芥的花期。WT通过蓝光也能促进开花,结论是是通过蓝光受体而不是光敏色素对蓝光应答。

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