At-HSP17.6A, encoding a small heat-shock protein in Arabidopsis, can enhance osmotolerance upon overexpression

Plant J. 2001 Sep;27(5):407-15. doi: 10.1046/j.1365-313x.2001.01107.x.


Owing to their sessile lifestyle, it is crucial for plants to acquire stress tolerance. The function of heat-shock proteins, including small heat-shock proteins (smHSPs), in stress tolerance is not fully explored. To gain further knowledge about the smHSPs, the gene that encoded the cytosolic class II smHSP in Arabidopsis thaliana (At-HSP17.6A) was characterized. The At-HSP17.6A expression was induced by heat and osmotic stress, as well as during seed development. Accumulation of At-HSP17.6A proteins could be detected with heat and at a late stage of seed development, but not with osmotic stress, suggesting stress-induced post-transcriptional regulation of At-HSP17.6A expression. Overproduction of At-HSP17.6A could increase salt and drought tolerance in Arabidopsis. The chaperone activity of At-HSP17.6A was demonstrated in vitro.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adaptation, Biological
  • Arabidopsis / physiology*
  • Arabidopsis Proteins / physiology*
  • Cytosol
  • Desiccation
  • Gene Expression Regulation
  • Genes, Plant
  • Heat-Shock Proteins / physiology*
  • Hot Temperature
  • Molecular Chaperones / physiology*
  • Osmotic Pressure
  • Plant Proteins / physiology*
  • Recombinant Proteins
  • Seeds / physiology


  • Arabidopsis Proteins
  • HSP17.6 protein, Arabidopsis
  • Heat-Shock Proteins
  • Molecular Chaperones
  • Plant Proteins
  • Recombinant Proteins