AKR-deficiency disturbs the balance of some signal transduction pathways in Arabidopsis thaliana

Jing Wang, Juqiang Yan, Hong Zhang

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

High-intensity light induces anthocyanin production in wild-type Arabidopsis leaves, but this induction is largely abolished in the chlorotic leaf tissues of AKR (ankyrin repeat-containing protein)-deficient plants. The steady-state mRNA levels of three anthocyanin biosynthetic genes, CHI, CHS and DFR, did not increase in response to high-intensity light treatment in chlorotic leaf tissues, whereas they increased several fold in green leaf tissues. There is a good correlation between anthocyanin production and transcript levels of anthocyanin biosynthetic genes, especially DFR, in green leaf tissues. In contrast, the transcripts of TCH2 and TCH3 that encode for calmodulin-related proteins and GPA that encodes for the α subunit of the trimeric G protein were much higher in chlorotic leaf tissues than those in green leaf tissues. These data suggest that the AKR-deficiency could increase gene expression in one signal transduction pathway and at the same time repress gene expression in another signal transduction pathway, which alludes to a possible mechanism for AKR involvement in chloroplast development.

Original languageEnglish
Pages (from-to)465-471
Number of pages7
JournalPlant Physiology and Biochemistry
Volume37
Issue number6
DOIs
StatePublished - Jun 1999

Keywords

  • Anthocyanin
  • Arabidopsis thaliana
  • Chlorosis
  • High-intensity light
  • Signal transduction

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