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- Title
At-HSP17.6A, encoding a small heat-shock protein inArabidopsis, can enhance osmotolerance upon overexpression.
- Authors
Sun, Weining; Bernard, Catherine; van de Cotte, Brigitte; Van Montagu, Marc; Verbruggen, Nathalie
- Abstract
Summary: 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.
- Subjects
HEAT shock proteins; ARABIDOPSIS thaliana
- Publication
Plant Journal, 2001, Vol 27, Issue 5, p407
- ISSN
0960-7412
- Publication type
Article
- DOI
10.1046/j.1365-313X.2001.01107.x