Journal
PLANT SCIENCE
Volume 276, Issue -, Pages 181-188Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.plantsci.2018.08.017
Keywords
Apple; ERF; Ethylene; Salt stress
Categories
Funding
- Natural Science Foundation of China [31601742, 31772288]
- Ministry of Education of China [IRT15R42]
- Shandong Province Government [SDAIT-06-03]
- Ministry of Agriculture of China [CARS-27, 2016-X11]
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Phytohormone ethylene is involved in salt stress response. As a key regulator of ethylene signaling, ethylene response factors (ERFs) have been reported to regulate salt stress tolerance. However, there are few studies on the relationship between ERFs in salt stress response. In this study, we isolated a salt-responsive gene MdERF4. Overexpression of MdERF4 negatively regulated salt stress tolerance and ethylene response, which was contrary to that of MdERF3 transgenic lines. Biochemical assays showed that MdERF4 directly bound to the DRE motif of MdERF3 promoter and suppressed its transcription. In addition, genetic analysis revealed that MdERF4 was involved in ethylene-mediated salt tolerance. Taken together, these findings demonstrated the transcriptional regulation between MdERF4 and MdERF3 in salt stress response and provided new insight into the ethylene modulated salt stress response.
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