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

作者：Weining Sun, Catherine Bernard, Brigitte van de Cotte, Marc Van Montagu, Nathalie Verbruggen · 发表于：The Plant Journal · 年份：2001 · DOI：10.1046/j.1365-313x.2001.01107.x · 被引用次数：323 · 研究领域：Heat shock proteins research、Seed Germination and Physiology、Bee Products Chemical Analysis

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.