genome-wide identification of the mads-box transcription factor family in pear (pyrus bretschneideri) reveals evolution and functional divergence

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ID: 169799
2017
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Abstract
MADS-box transcription factors play significant roles in plant developmental processes such as floral organ conformation, flowering time, and fruit development. Pear (Pyrus), as the third-most crucial temperate fruit crop, has been fully sequenced. However, there is limited information about the MADS family and its functional divergence in pear. In this study, a total of 95 MADS-box genes were identified in the pear genome, and classified into two types by phylogenetic analysis. Type I MADS-box genes were divided into three subfamilies and type II genes into 14 subfamilies. Synteny analysis suggested that whole-genome duplications have played key roles in the expansion of the MADS family, followed by rearrangement events. Purifying selection was the primary force driving MADS-box gene evolution in pear, and one gene pairs presented three codon sites under positive selection. Full-scale expression information for PbrMADS genes in vegetative and reproductive organs was provided and proved by transcriptional and reverse transcription PCR analysis. Furthermore, the PbrMADS11(12) gene, together with partners PbMYB10 and PbbHLH3 was confirmed to activate the promoters of the structural genes in anthocyanin pathway of red pear through dual luciferase assay. In addition, the PbrMADS11 and PbrMADS12 were deduced involving in the regulation of anthocyanin synthesis response to light and temperature changes. These results provide a solid foundation for future functional analysis of PbrMADS genes in different biological processes, especially of pigmentation in pear.
Reference Key
wang2017peerjgenome-wide Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Runze Wang;Meiling Ming;Jiaming Li;Dongqing Shi;Xin Qiao;Leiting Li;Shaoling Zhang;Jun Wu
Journal pediatrics
Year 2017
DOI
10.7717/peerj.3776
URL
https://peerj.com/articles/3776/
Keywords
anthocyanin transcription factor pear

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