Abstract
The cold-responsive (COR) genes involved in C-repeat binding factor signaling pathway function essentially in cold acclimation of higher plants. A novel COR gene CbCOR15a from shepherd’s purse (Capsella bursa-pastoris) was predicted to be a homolog of COR15 in Arabidopsis. The analysis of tissue specific expression pattern as well as characterization of the CbCOR15a promoter revealed that the expression of CbCOR15a was induced by coldness not only in leaves and stem but also in roots. Sequence analysis showed that a 909 bp promoter region of CbCOR15a contained two CRT/DRE elements, two ABRE elements, one auxin-responsive TGA-element and one MeJA-responsive CGTCA-motif. In young seedlings the expression of CbCOR15a could be apparently increased by SA, ABA, MeJA and IAA, and transiently increased by GA3 accompanied by obvious feedback suppression. According to the altered physiological index values in tobacco under cold treatments, the overexpression of CbCOR15a significantly increased the cold tolerance of transgenic tobacco plants. It can be suggested that CbCOR15a was involved in cold response of Capsella bursa-pastoris associated with SA, ABA, MeJA, IAA and GA3 regulation and confers enhanced cold acclimation in transgenic plants.
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Abbreviations
- ABA:
-
Abscisic acid
- COR:
-
Cold-responsive
- EV:
-
Empty vector control
- GA3 :
-
Gibberllic acid
- IAA:
-
Indole-3-acetic acid
- MeJA:
-
Methyl jasmonate
- qRT-PCR:
-
Quantitative real-time PCR
- RACE:
-
Rapid amplification of cDNA ends
- SA:
-
Salicylic acid
- WT:
-
Wild type
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Acknowledgments
This research was financially supported by The Major Program for the Fundamental Research of Shanghai, China (09JC1401700), The National High Technology Research and Development Program of China (863 Program) (2008AA10Z105), The National Key Technology R&D Program (2009BADA8B04).
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Zhou, M., Wu, L., Liang, J. et al. Expression analysis and functional characterization of a novel cold-responsive gene CbCOR15a from Capsella bursa-pastoris . Mol Biol Rep 39, 5169–5179 (2012). https://doi.org/10.1007/s11033-011-1313-1
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DOI: https://doi.org/10.1007/s11033-011-1313-1