Molecular Biology Reports

, Volume 38, Issue 3, pp 1567–1574

Tamarix hispida metallothionein-like ThMT3, a reactive oxygen species scavenger, increases tolerance against Cd2+, Zn2+, Cu2+, and NaCl in transgenic yeast

  • Jingli Yang
  • Yucheng Wang
  • Guifeng Liu
  • Chuanping Yang
  • Chenghao Li
Article

DOI: 10.1007/s11033-010-0265-1

Cite this article as:
Yang, J., Wang, Y., Liu, G. et al. Mol Biol Rep (2011) 38: 1567. doi:10.1007/s11033-010-0265-1

Abstract

A metallothionein-like gene, ThMT3, encoding a type 3 metallothionein, was isolated from a Tamarix hispida leaf cDNA library. Expression analysis revealed that mRNA of ThMT3 was upregulated by high salinity as well as by heavy metal ions, and that ThMT3 was predominantly expressed in the leaf. Transgenic yeast (Saccharomyces cerevisiae) expressing ThMT3 showed increased tolerance to Cd2+, Zn2+, Cu2+, and NaCl stress. Transgenic yeast also accumulated more Cd2+, Zn2+, and NaCl, but not Cu2+. Analysis of the expression of four genes (GLR1, GTT2, GSH1, and YCF1) that aid in transporting heavy metal (Cd2+) from the cytoplasm to the vacuole demonstrated that none of these genes were induced under Cd2+, Zn2+, Cu2+, and NaCl stress in ThMT3-transgenic yeast. H2O2 levels in transgenic yeast under such stress conditions were less than half those in control yeast under the same conditions. Three antioxidant genes (SOD1, CAT1, and GPX1) were specifically expressed under Cd2+, Zn2+, Cu2+, and NaCl stress in the transgenic yeast. Cd2+, Zn2+, and Cu2+ increased the expression levels of SOD1, CAT1, and GPX1, respectively, whereas NaCl induced the expression of SOD1 and GPX1.

Keywords

Saccharomyces cerevisiaeMetallothioneinAbiotic stressROSVacuolar transportHeavy metal

Supplementary material

11033_2010_265_MOESM1_ESM.pdf (41 kb)
Supplementary material 1 (PDF 41 kb)

Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • Jingli Yang
    • 1
  • Yucheng Wang
    • 1
  • Guifeng Liu
    • 1
  • Chuanping Yang
    • 1
  • Chenghao Li
    • 1
  1. 1.Key Laboratory of Forest Improvement and Biotechnology, Ministry of Education, Northeast Forestry UniversityHarbinPeople’s Republic of China