DFL2, a New Member of the Arabidopsis GH3 Gene Family, is Involved in Red Light-Specific Hypocotyl Elongation

Tomoyuki Takase, Miki Nakazawa, Akie Ishikawa, Katsushi Manabe, Minami Matsui

Research output: Contribution to journalArticlepeer-review

60 Citations (Scopus)

Abstract

A new GH3-related gene, designated DFL2, causes a short hypocotyl phenotype when overexpressed under red and blue light and a long hypocotyl when antisensed under red light conditions. Higher expression of this gene was observed in continuous white, blue and far-red light but the expression level was low in red light and darkness. DFL2 gene expression was induced transiently with red light pulse treatment. DFL2 transgenic plants exhibited a normal root phenotype including primary root elongation and lateral root formation, although primary root elongation was inhibited in antisense transgenic plants only under red light. The adult phenotypes of sense and antisense transgenic plants were not different from that of wild type. DFL2 promoter activity was observed in the hypocotyl. Our results suggest that DFL2 is located downstream of red light signal transduction and determines the degree of hypocotyl elongation.

Original languageEnglish
Pages (from-to)1071-1080
Number of pages10
JournalPlant and Cell Physiology
Volume44
Issue number10
DOIs
Publication statusPublished - Oct 2003
Externally publishedYes

Keywords*

  • Arabidopsis
  • GH3
  • Light signal transduction
  • Red light

Field of Science*

  • 1.6 Biological sciences

Publication Type*

  • 1.1. Scientific article indexed in Web of Science and/or Scopus database

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