期刊
PLANT JOURNAL
卷 101, 期 3, 页码 573-589出版社
WILEY
DOI: 10.1111/tpj.14555
关键词
apple; ERF transcription factor; drought stress; anthocyanin biosynthesis; post-translational modification
资金
- National Key Research and Development Program [2018YFD1000200]
- Natural Science Foundation of China [31430074]
- Shandong Province Government [SDAIT-06-03]
- Natural Science Foundation of Shandong Province [ZR2019PC004]
- Ministry of Agriculture of China [CARS-27]
Drought stress induces anthocyanin biosynthesis in many plant species, but the underlying molecular mechanism remains unclear. Ethylene response factors (ERFs) play key roles in plant growth and various stress responses, including affecting anthocyanin biosynthesis. Here, we characterized an ERF protein, MdERF38, which is involved in drought stress-induced anthocyanin biosynthesis. Biochemical and molecular analyses showed that MdERF38 interacted with MdMYB1, a positive modulator of anthocyanin biosynthesis, and facilitated the binding of MdMYB1 to its target genes. Therefore, MdERF38 promoted anthocyanin biosynthesis in response to drought stress. Furthermore, we found that MdBT2, a negative modulator of anthocyanin biosynthesis, decreased MdERF38-promoted anthocyanin biosynthesis by accelerating the degradation of the MdERF38 protein. In summary, our data provide a mechanism for drought stress-induced anthocyanin biosynthesis that involves dynamic modulation of MdERF38 at both transcriptional and post-translational levels.
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