Identification and Functional Characterization of Tomato CircRNAs Derived from Genes Involved in Fruit Pigment Accumulation
文献类型： 外文期刊
作者： Tan, Jinjuan 1 ; Zhou, Zhongjing 1 ; Niu, Yujie 1 ; Sun, Xiaoyong 2 ; Deng, Zhiping 1 ;
作者机构： 1.Zhejiang Acad Agr Sci, Inst Virol & Biotechnol, State Key Lab Breeding Base Zhejiang Sustainable, Hangzhou 310021, Zhejiang, Peoples R China
2.Shandong Agr Univ, Coll Informat Sci & Engn, Agr Big Data Res Ctr, Tai An 271018, Shandong, Peoples R China
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）
ISSN： 2045-2322
年卷期： 2017 年 7 卷
页码：
收录情况： SCI
摘要： CircRNAs, a class of widespread circular RNAs produced from precursor mRNA back-splicing, have been implicated in regulation of gene expression in eukaryotes, but their biological functions in plants have not yet been elucidated. By deep sequencing of rRNA-removed and RNase R-digested RNA samples we have identified several thousands of putative back-splicing sites in tomato fruit (Solanum lycopersicum) and show that the abundance of some of these circRNAs derived from fruit pigment biosynthesis genes are regulated by fruit ripening. Herein, we overexpressed a circRNA derived from Phytoene Synthase 1 (PSY1) in tomato 'Ailsa Craig' and microTom. The PSY1 mRNA abundance, the lycopene and beta-carotene accumulation were decreased significantly in the transgenic tomato fruits, likely due to the continuous highly expressed circRNAs and/or the low abundant linear RNAs generated from the overexpression vector. Besides, overexpression of a circRNA derived from Phytoene Desaturase (PDS) showed similar results. Our results provide biological insights into plant circRNAs.
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