Journal
PLANTA
Volume 231, Issue 6, Pages 1251-1260Publisher
SPRINGER
DOI: 10.1007/s00425-010-1122-0
Keywords
Arabidopsis; Drought; Functionally redundant; Salt; Stress tolerance
Categories
Funding
- Shanghai and National Natural Science Foundation [30670179, 08ZR1417200]
- ISTC [08540706500]
- Shanghai Municipal Committee of Agriculture [2008-7-5]
- Shanghai Rising-Star Program [08QH14021]
- [2006AA10Z117]
- [2006AA06Z358]
- [2008AA10Z401]
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The calcium-dependent protein kinase (CDPK) family is needed in plant signaling during various physiological pathways. The Arabidopsis AtCPK6 gene belongs to the subclass of stress-inducible CDPKs, which is stimulated by salt and osmotic stress. To elucidate the physiological function of AtCPK6, transgenic Arabidopsis plants under the control of double CaMV 35S promoter were obtained. AtCPK6 over-expressing plants showed enhanced tolerance to salt/drought stresses. The elevated tolerance of the AtCPK6 over-expressing plants was confirmed by the change of proline and malondialdehyde (MDA). Real-time PCR analyses revealed that the expression levels of several stress-regulated genes were altered in AtCPK6 over-expressing plants. However, cpk6 mutant displayed no obvious difference with control. These results are likely to indicate that AtCPK6 is functionally redundant and a positive regulator involved in the tolerance to salt/drought stress in Arabidopsis.
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