Comparative transcriptome analysis of mulberry reveals anthocyanin biosynthesis mechanisms in black (Morus atropurpureaRoxb.) and white (Morus albaL.) fruit genotypes
文献类型： 外文期刊
作者： Huang, Gaiqun 1 ; Zeng, Yichun 2 ; Wei, Ling 2 ; Yao, Yongquan 2 ; Dai, Jie 2 ; Liu, Gang 2 ; Gui, Zhongzheng 1 ;
作者机构： 1.Jiangsu Univ Sci & Technol, Sch Biotechnol, Zhenjiang 212018, Jiangsu, Peoples R China
2.Sichuan Acad Agr Sci, Sericultural Res Inst, Nanchong 637000, Sichuan, Peoples R China
3.Chinese Acad Agr Sci, Sericultural Res Inst, Zhenjiang 212003, Jiangsu, Peoples R China
关键词： Mulberry fruit; Anthocyanin; Biosynthesis; Transcriptome
期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.215； 五年影响因子：4.96 ）
ISSN： 1471-2229
年卷期： 2020 年 20 卷 1 期
页码：
收录情况： SCI
摘要： Background To gain a better understanding of anthocyanin biosynthesis in mulberry fruit, we analyzed the transcriptome of the mulberry varieties Da 10 (Morus atropurpureaRoxb., black fruit) and Baisang (Morus albaL., white fruit). Results We found that whereas Da 10 had high levels of cyanidin 3-O-glucoside (Cy), and pelargonidin 3-O-glucoside (Pg), Baisang contained only Cy, at low levels. Based on a comparative transcriptome analysis, we annotated more than 27,085 genes (including 1735 new genes). Genes that were differentially expressed between Da 10 and Baisang were detected at three stages of fruit development: S1 [4256 genes, 10 days post-anthesis (DPA)], S2 (5612 genes, 19 DPA), and S3 (5226 genes, 28 DPA). Anthocyanin biosynthesis was found to be associated with the expression of 15 core genes and 5 transcription factors. Relative to Baisang, Da 10 showed a significant upregulation of genes involved in the early stages (production of the intermediate compounds chalcone and dihydroflavonol) and late stages (production of Cy and Pg) of anthocyanin biosynthesis. Baisang showed a significant downregulation of the genes involved in the early stages of anthocyanin biosynthesis and overexpression of flavanone 3-hydroxylase (FLS), resulting in the generation of quercetin and/or myricetin but not anthocyanins. Conclusions The biosynthesis of anthocyanin in mulberry fruit is initiated from the precursor, phenylalanine, and mediated by the upregulation of dihydroflavonol 4-reductase, anthocyanidin synthase, anthocyanidin 3-O-glucosyltransferase, and cyanidin-3-O-glucoside 2-O-glucuronosyltransferase, and downregulation of FLS to produce Cy and Pg.
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