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A Complement of Ten Essential and Pleiotropic Arabidopsis COP/DET/FUS Genes Is Necessary for Repression of Photomorphogenesis in Darkness

S. F. Kwok, B. Piekos, S. Misera, X. W. Deng
S. F. Kwok
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B. Piekos
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S. Misera
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X. W. Deng
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Published March 1996. DOI: https://doi.org/10.1104/pp.110.3.731

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Abstract

Two genetic screens, one for mutations resulting in photomorphogenic development in darkness and the other for mutants with fusca phenotype, have thus far identified six pleiotropic Arabidopsis COP/DET/FUS genes. Here, we characterized representative mutants that define four additional pleiotropic photomorphogenic loci and a null mutant allele of the previously defined DET1 locus. Dark-grown seedlings homozygous for these recessive mutations exhibit short hypocotyls and expanded cotyledons and are lethal before reaching reproductive development. Dark-grown mutant seedlings also display characteristic photomorphogenic cellular differentiation and elevated expression of light-inducible genes. In addition, analyses of plastids from dark-grown mutants reveal partial chloroplast differentiation and absence of etioplast development. Root vascular bundle cells of light-grown mutant seedlings develop chloroplasts, suggesting that these FUS gene products are important for suppression of chloroplast differentiation in light-grown roots. Double-mutant analyses indicate that these pleiotropic cop/det/fus mutations are epistatic to mutations in phytochromes, a blue-light photoreceptor, and a downstream regulatory component, HY5. Therefore, there is a complement of at least 10 essential and pleiotropic Arabidopsis genes that are necessary for repression of photomorphogenic development.

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A Complement of Ten Essential and Pleiotropic Arabidopsis COP/DET/FUS Genes Is Necessary for Repression of Photomorphogenesis in Darkness
S. F. Kwok, B. Piekos, S. Misera, X. W. Deng
Plant Physiology Mar 1996, 110 (3) 731-742; DOI: 10.1104/pp.110.3.731

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A Complement of Ten Essential and Pleiotropic Arabidopsis COP/DET/FUS Genes Is Necessary for Repression of Photomorphogenesis in Darkness
S. F. Kwok, B. Piekos, S. Misera, X. W. Deng
Plant Physiology Mar 1996, 110 (3) 731-742; DOI: 10.1104/pp.110.3.731
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Plant Physiology
Vol. 110, Issue 3
Mar 1996
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More in this TOC Section

  • The rms1 Mutant of Pea Has Elevated Indole-3-Acetic Acid Levels and Reduced Root-Sap Zeatin Riboside Content but Increased Branching Controlled by Graft-Transmissible Signal(s)
  • Bacterial Cellulose-Binding Domain Modulates in Vitro Elongation of Different Plant Cells
  • Gibberellin Dose-Response Regulation of GA4 Gene Transcript Levels in Arabidopsis
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