Abstract:
:Saliva miltiorrhiza ethylene response factor (SmERF), predicted to be expressed genome-wide, is the potential regulator of tanshinone biosynthesis. However, few studies have investigated its transcriptional regulation pathways in tanshinone biosynthesis. Here, we report an ethylene response factor (SmERF8), which was screened by the SmKSL1 (a key gene in tanshinone biosynthesis) promoter from the S. miltiorrhiza cDNA library. The SmERF8, highly expressed in S. miltiorrhiza root head, is sensitive to Eth stress, and its protein was enriched in the nucleus. The SmERF8 recognizes the GCC-box in the SmKSL1 promoter. Overexpression and RNAi of SmERF8 in S. miltiorrhiza transgenic hairy roots showed that the tanshinone contents were significantly increased in the overexpression transgenic lines and decreased in RNAi lines. These results suggest that the SmERF8 may be a central activator that regulates the expression of SmKSL1 by binding the GCC-box and then promoting tanshinone biosynthesis. Thus, the SmERF8 may functionally accelerate tanshinone biosynthesis by the transcriptional regulation of its key gene.
journal_name
J Plant Physioljournal_title
Journal of plant physiologyauthors
Bai Z,Wu J,Huang W,Jiao J,Zhang C,Hou Z,Yan K,Zhang X,Han R,Liang Z,Zhang Xdoi
10.1016/j.jplph.2019.153006subject
Has Abstractpub_date
2020-01-01 00:00:00pages
153006eissn
0176-1617issn
1618-1328pii
S0176-1617(19)30106-3journal_volume
244pub_type
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