期刊
BIOLOGIA PLANTARUM
卷 54, 期 1, 页码 105-111出版社
ACAD SCIENCES CZECH REPUBLIC, INST EXPERIMENTAL BOTANY
DOI: 10.1007/s10535-010-0015-1
关键词
high temperature stress; transgenic plants; yeast gene
资金
- National Natural Science Foundation of China [30800602]
- Shanghai Natural Science Foundation [07ZR14094]
- Shanghai Key Basic Research Project [06DZ19103]
- Shanghai municipal committee of agriculture [2006-2-1]
In the yeast Saccharomyces cerevisiae, the molecular chaperone HSP26 has the remarkable ability to sense increases in temperature directly and can switch from an inactive to a chaperone-active state. In this report, we analyzed the effect of expression of HSP26 in Arabidopsis thaliana plants and their response to high temperature stress. The hsp26 transgenic plants exhibited stronger growth than wild type plants at 45 degrees C for 16 h. The chlorophyll content and chlorophyll fluorescence decreased much more in wild type than in transgenic plants. Moreover, the transgenic plants had higher proline and soluble sugar contents, and lower relative electrical conductivity and malondialdehyde contents after high temperature stress. Furthermore, we found that over-expression of HSP26 in Arabidopsis increased the amount of free proline, elevated the expression of proline biosynthetic pathway genes and therefore enhanced Arabidopsis tolerance to heat stress.
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