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OtherGENE REGULATION AND MOLECULAR GENETICS
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Analysis of Flavanone 3-Hydroxylase in Arabidopsis Seedlings (Coordinate Regulation with Chalcone Synthase and Chalcone Isomerase)

M. K. Pelletier, B. W. Shirley
M. K. Pelletier
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B. W. Shirley
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Published May 1996. DOI: https://doi.org/10.1104/pp.111.1.339

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Abstract

A genomic clone encoding flavanone 3-hydroxylase (F3H) was isolated from Arabidopsis thaliana. The deduced amino acid sequence is 72 to 94% identical to all previously reported F3H proteins. Low-stringency DNA blot analysis indicated that F3H is encoded by a single gene in Arabidopsis. The F3H locus was mapped to the bottom of chromosome 3 and therefore does not correspond to any of the 13 flavonoid-deficient transparent testa mutants for which a map position is known. Analysis of gene expression in etiolated seedlings exposed to white light and in two putative regulatory mutants, ttg and tt8, demonstrated that the Arabidopsis F3H gene is coordinately expressed with chalcone synthase and chalcone isomerase in seedlings, whereas dihydroflavonol reductase expression is controlled by distinct regulatory mechanisms. The F3H gene may represent a pivotal point in the regulation of flavonoid biosynthesis because its expression is coordinated with different subsets of genes in different plant species.

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Analysis of Flavanone 3-Hydroxylase in Arabidopsis Seedlings (Coordinate Regulation with Chalcone Synthase and Chalcone Isomerase)
M. K. Pelletier, B. W. Shirley
Plant Physiology May 1996, 111 (1) 339-345; DOI: 10.1104/pp.111.1.339

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Analysis of Flavanone 3-Hydroxylase in Arabidopsis Seedlings (Coordinate Regulation with Chalcone Synthase and Chalcone Isomerase)
M. K. Pelletier, B. W. Shirley
Plant Physiology May 1996, 111 (1) 339-345; DOI: 10.1104/pp.111.1.339
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Plant Physiology
Vol. 111, Issue 1
May 1996
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More in this TOC Section

  • Cloning of Sucrose:Sucrose 1-Fructosyltransferase from Onion and Synthesis of Structurally Defined Fructan Molecules from Sucrose
  • RNA Polymerase Subunits Encoded by the Plastid rpoGenes Are Not Shared with the Nucleus-Encoded Plastid Enzyme
  • Decreased GA1 Content Caused by the Overexpression ofOSH1 Is Accompanied by Suppression of GA 20-Oxidase Gene Expression
Show more GENE REGULATION AND MOLECULAR GENETICS

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