Polyploidy underlies co-option and diversification of biosynthetic triterpene pathways in the apple tribe
文献类型： 外文期刊
作者： Su, Wenbing 1 ; Jing, Yi 2 ; Lin, Shoukai 3 ; Yue, Zhen 2 ; Yang, Xianghui 1 ; Xu, Jiabao 2 ; Wu, Jincheng 3 ; Zhang, Zhi 1 ;
作者机构： 1.South China Agr Univ, Coll Hort,Minist Agr & Rural Affairs, State Key Lab Conservat & Utilizat Subtrop Agrobi, Key Lab Biol & Genet Improvement Hort Crops, Guangzhou 510642, Peoples R China
2.Beijing Genom Inst Genom, Res Cooperat Dept, Shenzhen 518083, Peoples R China
3.Putian Univ, Key Lab Loquat Germplasm Innovat & Utilizat Fujia, Putian 351100, Peoples R China
4.Shanghai Jiao Tong Univ, Joint Ctr Single Cell Biol, Sch Agr & Biol, Shanghai 200240, Peoples R China
5.Univ Nottingham, Future Food Beacon, Nottingham NG7 2RD, England
6.Univ Nottingham, Sch Life Sci, Nottingham NG7 2RD, England
7.Fujian Acad Agr Sci, Fruit Res Inst, Fuzhou 350013, Peoples R China
关键词： polyploidy; comparative genomics; evolution; triterpene biosynthesis; apple tribe
期刊名称：PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA （ 影响因子：11.205； 五年影响因子：12.291 ）
ISSN： 0027-8424
年卷期： 2021 年 118 卷 20 期
页码：
收录情况： SCI
摘要： Whole-genome duplication (WGD) plays important roles in plant evolution and function, yet little is known about how WGD underlies metabolic diversification of natural products that bear significant medicinal properties, especially in nonmodel trees. Here, we reveal how WGD laid the foundation for co-option and differentiation of medicinally important ursane triterpene pathway duplicates, generating distinct chemotypes between species and between developmental stages in the apple tribe. After generating chromosome-level assemblies of a widely cultivated loquat variety and Gillenia trifoliata, we define differentially evolved, duplicated gene pathways and date the WGD in the apple tribe at 13.5 to 27.1 Mya, much more recent than previously thought. We then functionally characterize contrasting metabolic pathways responsible for major triterpene biosynthesis in G. trifoliata and loquat, which pre- and postdate the Maleae WGD, respectively. Our work mechanistically details the metabolic diversity that arose post-WGD and provides insights into the genomic basis of medicinal properties of loquat, which has been used in both traditional and modern medicines.
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