Genome-Wide Analysis of the PIN Auxin Efflux Carrier Gene Family in Coffee

文献类型： 外文期刊

第一作者： Huang, Xing

作者： Huang, Xing;He, Chunping;Lu, Ying;Wu, Weihuai;Yi, Kexian;Huang, Xing;He, Chunping;Lu, Ying;Wu, Weihuai;Yi, Kexian;Huang, Xing;He, Chunping;Lu, Ying;Wu, Weihuai;Yi, Kexian;Bai, Xuehui;Guo, Tieying;Xie, Zhouli;Laimer, Margit;Du, Dengxiang;Gbokie, Thomas;Zhang, Zhirun

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关键词： PIN; auxin efflux carrier; phylogeny; expression; Coffea arabica; Coffea canephora; Coffea eugenioides

期刊名称：PLANTS-BASEL （ 影响因子：3.935； ）

ISSN：

年卷期： 2020 年 9 卷 9 期

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收录情况： SCI

摘要： Coffee is one of the most popular beverages around the world, which is mainly produced from the allopolyploidCoffea arabica. The genomes ofC. arabicaand its two ancestorsC. canephoraandC. eugenioideshave been released due to the development of next generation sequencing. However, few studies onC. arabicaare related to the PIN-FORMED (PIN) auxin efflux transporter despite its importance in auxin-mediated plant growth and development. In the present study, we conducted a genome-wide analysis of the PIN gene family in the three coffee species. Totals of 17, 9 and 10 of the PIN members were characterized inC. Arabica,C. canephoraandC. eugenioides, respectively. Phylogenetic analysis revealed gene loss of PIN1 and PIN2 homologs inC. arabica, as well as gene duplication of PIN5 homologs during the fractionation process after tetraploidy. Furthermore, we conducted expression analysis ofPINgenes inC. arabicaby in silico and qRT-PCR. The results revealed the existence of gene expression dominance in allopolyploid coffee and illustrated several PIN candidates in regulating auxin transport and homeostasis under leaf rust fungus inoculation and the tissue-specific expression pattern ofC. arabica. Together, this study provides the basis and guideline for future functional characterization of the PIN gene family.

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