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Ultraviolet B-induced MdWRKY72 expression promotes anthocyanin synthesis in apple.
- Source :
-
Plant Science . Mar2020, Vol. 292, pN.PAG-N.PAG. 1p. - Publication Year :
- 2020
-
Abstract
- • In this paper, the pathway of WRKY transcription factor in regulating apple anthocyanin was described. • This article focuses on the mechanism of Ultraviolet-induced MdWRKY72 promoting anthocyanin synthesis in apples. • This enriches the genetic resources of anthocyanin synthesis and provides a theoretical basis. Ultraviolet-B (UV-B) radiation promotes anthocyanin synthesis in many plants. Although several transcription factors promote anthocyanin synthesis in response to UV-B radiation, the underlying mechanism remains unclear. In this study, the MdWRKY72 transcription factor gene was isolated from the 'Taishanzaoxia' apple genome. Quantitative real-time PCR analyses revealed that the genes encoding enzymes and transcription factors involved in the anthocyanin synthesis pathway (MdANS , MdDFR , MdUFGT , and MdMYB1) were more highly expressed in MdWRKY72 -overexpressing transgenic calli than in the wild-type 'Orin' apple calli. The results indicated that MdWRKY72 increases anthocyanin synthesis in transgenic calli exposed to UV-B radiation. The results of a gel shift assay and chromatin immunoprecipitation proved that MdWRKY72 promotes MdMYB1 expression indirectly by binding to a W-box element in the MdHY5 promoter and directly by binding to a W-box element in the MdMYB1 promoter. Thus, MdWRKY72 increases anthocyanin synthesis via direct and indirect mechanisms. These findings may be useful for elucidating the molecular mechanism underlying UV-B-induced anthocyanin synthesis mediated by MdWRKY72. [ABSTRACT FROM AUTHOR]
- Subjects :
- *GERMPLASM
*TRANSCRIPTION factors
*ANTHOCYANINS
Subjects
Details
- Language :
- English
- ISSN :
- 01689452
- Volume :
- 292
- Database :
- Academic Search Index
- Journal :
- Plant Science
- Publication Type :
- Academic Journal
- Accession number :
- 141435332
- Full Text :
- https://doi.org/10.1016/j.plantsci.2019.110377