Plant Molecular Biology

, Volume 55, Issue 3, pp 399–416

Hv-WRKY38: a new transcription factor involved in cold- and drought-response in barley

  • Caterina Marè
  • Elisabetta Mazzucotelli
  • Cristina Crosatti
  • Enrico Francia
  • A.␣michele Stanca
  • Luigi Cattivelli
Article

Abstract

WRKY proteins constitute a large family of plant specific transcription factors implicated in many different processes. Here we describe Hv-WRKY38,a barley gene coding for a WRKY protein, whose expression is involved in cold and drought stress response. Hv-WRKY38 was early and transiently expressed during exposure to low non-freezing temperature, in ABA-independent manner. Furthermore, it showed a continuous induction during dehydration and freezing treatments. A WRKY38:YFP fusion protein was found to localise into the nucleus upon introduction into epidermal onion cells. Bacterially expressed Hv-WRKY38 was able to bind in vitro to the W-box element (T)TGAC(C/T) also recognisable by other WRKY proteins. Hv-WRKY38genomic DNA was sequenced and mapped onto the centromeric region of the barley chromosome 6H. Arabidopsis and rice sequences homologous to Hv-WRKY38 were also identified. Our results indicate that Hv-WRKY38 transcription factor may play a regulatory role in abiotic stress response.

barley cold drought freezing transcription factor WRKY protein 

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Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • Caterina Marè
    • 1
  • Elisabetta Mazzucotelli
    • 2
    • 3
  • Cristina Crosatti
    • 1
  • Enrico Francia
    • 1
  • A.␣michele Stanca
    • 1
  • Luigi Cattivelli
    • 1
  1. 1.Istituto Sperimentale per la CerealicolturaProtasoItaly
  2. 2.Istituto Sperimentale per la CerealicolturaItaly
  3. 3.Dipartimento di Biologia sez. Biologia evolutivaUniversità degli Studi di FerraraItaly

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