Abstract
Key message
Our study shows that the expression of AtCBF3 and AtCOR15A improved the chilling tolerance in transgenic eggplant.
Abstract
In an attempt to improve chilling tolerance of eggplant (Solanum melongena L) plants, Arabidopsis C-repeat binding factor 3 (AtCBF3) and cold-regulated 15A (AtCOR15A) genes both driven by an Arabidopsis RESPONSIVE TO DESSICATION 29A promoter (AtRD29A) were transferred into the plants of eggplant cultivar Sanyueqie. Two independent homozygous transgenic lines were tested for their cold tolerance. The leaves of the transgenic plants in both lines withered much slower and slighter than the wild-type plants after exposure to cold stress treatment at 2 ± 1 °C. The gene expression of AtCBF3 and AtCOR15A was significantly increased as well as the proline content and the levels of catalase and peroxidase activities, while the relative electrical conductivity and the malondialdehyde content were remarkably decreased in the transgenic plants compared with the wild type at 4 ± 0.5 °C. The results showed that the expression of the exogenous AtCBF3 and AtCOR15A could promote the cold adaptation process to protect eggplant plants from chilling stress.
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Abbreviations
- AtRD29A:
-
RESPONSIVE TO DESSICATION 29A promoter of Arabidopsis thaliana
- 6-BA:
-
6-benzyladenine
- CaMV 35S:
-
Cauliflower mosaic virus 35S promoter
- CAT:
-
Catalase
- CBF:
-
C-repeat-binding factor
- EL:
-
Electrolyte leakage
- FW:
-
Fresh weight
- MDA:
-
Malondialdehyde
- NAA:
-
α-Naphthaleneacetic acid
- POD:
-
Peroxidase
- ROS:
-
Reactive oxygen species
- RT:
-
Room temperature
- RT-PCR:
-
Real-time PCR
- TBA:
-
2-thiobarbituric acid
- Tnos:
-
The terminator of nopaline synthase gene
- ZT:
-
Zeatin
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Acknowledgments
This research was supported by the National High Technology Research and Development Program of China (863 Program, Grant No. 2009AA10Z104-7), the Transgenic Engineering Crops Breeding Special Funds from China’s Ministry of Agriculture (Grant No. 2009ZX08010-005B) and China Postdoctoral Science Foundation (Grant No. 2013M540692).
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The authors declare that they have no conflict of interest.
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Communicated by Kinya Toriyama.
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Wan, F., Pan, Y., Li, J. et al. Heterologous expression of Arabidopsis C-repeat binding factor 3 (AtCBF3) and cold-regulated 15A (AtCOR15A) enhanced chilling tolerance in transgenic eggplant (Solanum melongena L.). Plant Cell Rep 33, 1951–1961 (2014). https://doi.org/10.1007/s00299-014-1670-z
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DOI: https://doi.org/10.1007/s00299-014-1670-z