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Plant and Cell Physiology Advance Access published online on February 16, 2008
Plant and Cell Physiology, doi:10.1093/pcp/pcn025
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© The Author 2008. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

Different stress signals determine the expression pattern of sugarcane SodERF3, a novel sugarcane Ethylene Responsive Factor (ERF) enhances salt and drought tolerance when over-expressed in tobacco plants

LE. Trujillo1, M. Sotolongo1, C. Menéndez1, M.E Ochogavía1, Y. Coll1, I. Hernández2, O. Borrás2, B.P.H.J. Thomma3, P. Vera4 and L. Hernández1

1Laboratory of Plant Microbe Interactions, Center for Genetic Engineering and Biotechnology, Havana, Cuba.
2Laboratory of Functional Genomics, Center for Genetic Engineering and Biotechnology, Havana, Cuba
3Laboratory of Phytopathology, Wageningen University, Binnenhaven 5, 6709 PD Wageningen, The Netherlands
4Laboratory of Plant Response to Biotic/Abiotic Factors. Institute of Molecular and Cellular Plant Biology IBMCP), Valencia, Spain

CORRESPONDING AUTHOR, Dr. Luis E Trujillo, Center for Genetic Engineering and Biotechnology, Havana, Cuba, Ave 31 e/ 158 and 190, Cubanacán, Playa, Havana City, Cuba, Fax: 53 7 331779, e-mail: luis.trujillo{at}cigb.edu.cu


  Abstract

The molecular signals and pathways that govern biotic and abiotic stress responses in sugarcane are poorly understood. In this paper, we describe SodERF3, asugarcane (Saccharum officinarum L. cv Ja60-5) cDNA that encodes a 201 amino acid DNA-binding protein that acts as a transcriptional regulator of the Ethylene Responsive Factor (ERF) superfamily. Like other ERF transcription factors, the SodERF3 protein binds to the GCC box, and its deduced amino acid sequence contains an N-terminal putative nuclear localization signal (NLS). In addition, a C-terminal short hydrophobic region that is highly homologous to an ERF-associated amphiphilic repression-like motif, typical for class II ERFs, was found. Northern and Western blot analysis showed that SodERF3 is induced by ethylene. In addition, SodERF3 is induced by abscisic acid (ABA), salt stress and wounding. Greenhouse grown transgenic tobacco plants (Nicotiana tabacum L. cv. SR1) expressing SodERF3 were found to display increased tolerance to drought and osmotic stress.

Keywords: abiotic stress - abscisic acid - ethylene responsive factors - EAR motif, salt and drought tolerance - sugarcane - transcription factors

(Received November 17, 2007; Accepted February 12, 2008)
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