The Hardy Rubber Tree Genome Provides Insights into the Evolution of Polyisoprene Biosynthesis
文献类型： 外文期刊
作者： Wuyun, Ta-na 1 ; Wang, Lin 1 ; Liu, Huimin 1 ; Wang, Xuewen 9 ; Zhang, Liangsheng 4 ; Bennetzen, Jeffrey L. 9 ; Li, Ti 1 ;
作者机构： 1.Chinese Acad Forestry, Nontimber Forest Res & Dev Ctr, Zhengzhou 450003, Henan, Peoples R China
2.Chinese Acad Trop Agr Sci, Rubber Res Inst, Minist Agr, Key Lab Biol & Genet Resources Rubber Tree, Danzhou 571737, Peoples R China
3.State Forestry Adm, Eucommia Engn Res Ctr, Zhengzhou 450003, Henan, Peoples R China
4.Fujian Agr & Forestry Univ, Ctr Genom & Biotechnol, State Key Lab Ecol Pest Control Fujian & Taiwan C, Fuzhou 350002, Fujian, Peoples R China
5.Henan Acad Agr Sci, Inst Plant Protect Res, Zhengzhou 450003, Henan, Peoples R China
6.Shandong BELO EUCOMMIA Biol Engn Co Ltd, Qingzhou 262500, Peoples R China
7.Next Biosci Co Ltd, Wuhan 430073, Hubei, Peoples R China
8.Wuhan Unique Gene Bioinformat Sci & Technol Co Lt, Wuhan 430073, Hubei, Peoples R China
9.Univ Georgia, Dept Genet, Athens, GA 30602 USA
关键词： Eucommia ulmoides genome; environmental adaptability; eucommia rubber
期刊名称：MOLECULAR PLANT （ 影响因子：13.164； 五年影响因子：16.357 ）
ISSN： 1674-2052
年卷期： 2018 年 11 卷 3 期
页码：
收录情况： SCI
摘要： Eucommia ulmoides, also called hardy rubber tree, is an economically important tree; however, the lack of its genome sequence restricts the fundamental biological research and applied studies of this plant species. Here, we present a high-quality assembly of its similar to 1.2-Gb genome (scaffold N50 = 1.88 Mb) with at least 26 723 predicted genes for E. ulmoides, the first sequenced genome of the order Garryales, which was obtained using an integrated strategy combining Illumina sequencing, PacBio sequencing, and BioNano mapping. As a sister taxon to lamiids and campanulids, E. ulmoides underwent an ancient genome triplication shared by core eudicots but no further whole-genome duplication in the last similar to 125 million years. E. ulmoides exhibits high expression levels and/or gene number expansion for multiple genes involved in stress responses and the biosynthesis of secondary metabolites, which may account for its considerable environmental adaptability. In contrast to the rubber tree (Hevea brasiliensis), which produces cis-polyisoprene, E. ulmoides has evolved to synthesize long-chain trans-polyisoprene via farnesyl diphosphate synthases (FPSs). Moreover, FPS and rubber elongation factor/small rubber particle protein gene families were expanded independently from the H. brasiliensis lineage. These results provide new insights into the biology of E. ulmoides and the origin of polyisoprene biosynthesis.
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