Identification of 'Xinlimei' radish candidate genes associated with anthocyanin biosynthesis based on a transcriptome analysis
文献类型： 外文期刊
作者：
Sun, Yuyan
1
;
Wang, Jinglei
1
;
Qiu, Yang
1
;
Liu, Tongjin
1
;
Song, Jiangping
1
;
Li, Xixiang
1
;
作者机构： 1.Chinese Acad Agr Sci, Inst Vegetables & Flowers, Beijing 100081, Peoples R China
2.Zhejiang Acad Agr Sci, Inst Vegetables, Hangzhou 310021, Zhejiang, Peoples R China
关键词： Raphanus sativus L.; Taproot; Anthocyanin biosynthesis; Transcriptome sequencing; qRT-PCR
期刊名称：GENE （ 影响因子：3.688； 五年影响因子：3.329 ）
ISSN： 0378-1119
年卷期： 2018 年 657 卷
页码：
收录情况： SCI
摘要： Radish is an economically important vegetable crop belonging to the family Brassicaceae. The high anthocyanin content of the 'Xinlimer radish roots has been associated with diverse health benefits. However, there is a lack of transcript-level information regarding anthocyanin biosynthesis. In the present study, the 'Xinlimei' radish root transcriptome was analyzed by RNA sequencing at five developmental stages. A total of 222,384,034 clean reads were obtained and 32,253 unigenes were annotated. Expression profiles revealed 10,890 differentially expressed genes (DEGs) among the five analyzed libraries. The DEGs were predominantly involved in KEGG pathways related to the biosynthesis of phenylpropanoids, flavonoids, flavone, and flavonol. The transcriptome data revealed 44 structural and 182 transcription factor genes (TFs) associated with the anthocyanin biosynthetic pathway. Ten structural genes (i.e., 4CL3, CHSB2, CHS1, CHS3, F3H1, F3'H, DFR, DFR1, ANS, and UFGT) and two MYB genes, which were highly and differentially expressed during root development, may be critical for anthocyanin biosynthesis. Additionally, the co-expression of TFs and structural genes was analyzed. Three structural genes (i.e., DFR, ANS, and UFGT) were validated by molecular cloning. The qRT-PCR results indicated that the expression profiles of DEGs were generally consistent with the high-throughput sequencing results. These findings helped identify candidate genes involved in anthocyanin biosynthesis and may be useful for clarifying the molecular mechanism underlying the accumulation of anthocyanins in radish roots.
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