Overexpression of LSH1, a member of an uncharacterised gene family, causes enhanced light regulation of seedling development

Li Zhao, Miki Nakazawa, Tomoyuki Takase, Katsushi Manabe, Masatomo Kobayashi, Motoaki Seki, Kazuo Shinozaki, Minami Matsui

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

Abstract

Light regulates plant growth and development through a network of endogenous factors. By screening Arabidopsis activation-tagged lines, we isolated a dominant mutant (light-dependent short hypocotyls 1-D (Ish1-D)) that showed hypersensitive responses to continuous red (cR), far-red (cFR) and blue (cB) light and cloned the corresponding gene, LSH1. LSH1 encodes a nuclear protein of a novel gene family that has homologues in Arabidopsis and rice. The effects of the Ish1-D mutation were tested in a series of photoreceptor mutant backgrounds. The hypersensitivity to cFR and cB light conferred by Ish1-D was abolished in a phyA null background (phyA-201), and the hypersensitivity to cR and cFR light conferred by Ish1-D was much reduced in the phytochrome- chromophore synthetic mutant, hy1-1 (long hypocotyl 1). These results indicate that LSH1 is functionally dependent on phytochrome to mediate light regulation of seedling development.

Original languageEnglish
Pages (from-to)694-706
Number of pages13
JournalPlant Journal
Volume37
Issue number5
DOIs
Publication statusPublished - Mar 2004
Externally publishedYes

Keywords*

  • Activation tagging
  • Arabidopsis
  • Light
  • LSH1
  • New gene family
  • Photoreceptors

Field of Science*

  • 1.6 Biological sciences

Publication Type*

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

Fingerprint

Dive into the research topics of 'Overexpression of LSH1, a member of an uncharacterised gene family, causes enhanced light regulation of seedling development'. Together they form a unique fingerprint.

Cite this