Abstract
Transcriptional repressors are emerging as central regulators of development and stress responses in different organisms. The ERF-associated amphiphilic repression (EAR) motif was identified as essential for transcriptional repression. To gain a better understanding of this type of protein, we reported here a novel GmERF4 protein from soybean. Sequence alignment showed that GmERF4 contains one AP2/ERF domain, two putative nuclear localization signal regions and one EAR motif. The GmERF4 protein was preferentially localized to the nucleus of onion epidermis cells and bound specifically to the GCC box and DRE/CRT element in vitro. Furthermore, the expression of GmERF4 was induced by ethylene, JA, SA, cold, salt, drought, and soybean mosaic virus, and repressed by ABA. Constitutive expression of GmERF4 in transgenic tobacco plants increased tolerance to salt and drought stresses compared with wild-type plants, but did not exhibit detectable resistance against bacterial infection.
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Abbreviations
- ABA:
-
Abscisic acid
- EAR:
-
ERF-associated amphiphilic repression
- ERF:
-
Ethylene responsive factor
- ET:
-
Ethylene
- ORF:
-
Open reading frame
- RT-PCR:
-
Reverse transcription polymerase chain reaction
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Acknowledgments
The authors are grateful to Dr. R.A. McIntosh (Plant Breeding Institute, University of Sydney, Australia) for reviewing this manuscript. This work was funded by National HITECH Research and Development Program of China (“863” program, #2008AA10Z124 and #2006AA10A111), the National Natural Science Foundation of China (#30700508), National Key Project for Researches on Transgenic Plant (#2008ZX08002-002). We thank Dr. Lijuan Qiu (Soybean Molecular Breeding Group, Institute of Crop Sciences, CAAS) for seed of the soybean cultivars.
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The authors Gaiyun Zhang and Ming Chen contributed equally to this work.
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Zhang, G., Chen, M., Chen, X. et al. Isolation and characterization of a novel EAR-motif-containing gene GmERF4 from soybean (Glycine max L.). Mol Biol Rep 37, 809–818 (2010). https://doi.org/10.1007/s11033-009-9616-1
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DOI: https://doi.org/10.1007/s11033-009-9616-1