Journal
PLANT SCIENCE
Volume 209, Issue -, Pages 12-23Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.plantsci.2013.04.003
Keywords
ERF-associated amphiphilic repression; (EAR) motif; Ethylene response factor (ERF); Hypersensitive reaction (HR); Tobacco; Tobacco mosaic virus (TMV)
Categories
Funding
- Japan Society for the Promotion of Science (JSPS) [19580045]
- Collaborative Research Ring of Tokyo University of Agriculture and Technology (TUAT)
- TUAT Foundation
- [23-8011]
- Grants-in-Aid for Scientific Research [19580045] Funding Source: KAKEN
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The ethylene response factor (ERF) family is one of the largest families of plant-specific transcription factors. We have shown previously that the overexpression of the gene for NtERF3, a tobacco transcriptional repressor containing the ERF-associated amphiphilic repression (EAR) motif in the C-terminal region, induces hypersensitive reaction (HR)-like cell death. Many EAR motif-containing ERFs, including NtERF3, are clustered in group VIII of the ERF family. In this study, we aimed at revealing the cell death-inducing ability of group VIII ERFs and the correlation between ERFs and HR. The results showed that many of the EAR motif-containing ERFs classified into subgroup VIII-a of Arabidopsis, rice, and tobacco had cell death-inducing ability in tobacco leaves. Seven AtERFs in subgroup VIII-b did not induce cell death; however, some ERFs in subgroup VIII-b of rice and tobacco showed cell death-inducing ability. An expression analysis of group VIII ERFs in HR-inducing tobacco suggested that the cell death-inducing ability of NtERFs was not necessarily associated with induction of HR. In addition, it was revealed that the EAR motif-containing AtERFs in subgroup II-a also showed cell death-inducing ability. The influence of sequence variation in the EAR motif on the ability to induce cell death is also discussed. (C) 2013 Elsevier Ireland Ltd. All rights reserved.
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