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The Cymbidium genome reveals the evolution of unique morphological traits

文献类型： 外文期刊

作者： Ai, Ye 1 ; Li, Zhen 2 ; Sun, Wei-Hong 4 ; Chen, Juan 1 ; Zhang, Diyang 1 ; Ma, Liang 1 ; Zhang, Qing-Hua 4 ; Chen, Ming-K 1 ;

作者机构： 1.Fujian Agr & Forestry Univ, Key Lab Natl Forestry & Grassland Adm Orchid Cons, Coll Landscape Architecture, Fuzhou, Peoples R China

2.Univ Ghent, Dept Plant Biotechnol & Bioinformat, Ghent, Belgium

3.VIB Ctr Plant Syst Biol, Ghent, Belgium

4.Fujian Agr & Forestry Univ, Coll Forestry, Fuzhou, Peoples R China

5.Management Off Yushan Scen Area, Fuzhou, Peoples R China

6.Zhejiang Univ, Coll Agr & Biotechnol, Hangzhou, Peoples R China

7.Chinese Acad Sci, Key Lab Plant Resource Conservat & Sustainable Ut, South China Bot Garden, Guangzhou, Peoples R China

8.PubBio Tech, Wuhan, Peoples R China

9.Tsinghua Univ, Shenzhen Int Grad Sch, Ctr Biotechnol & Biomed, Tsinghua Berkeley Shenzhen Inst TBSI, Shenzhen, Peoples R China

10.Tsinghua Univ, Shenzhen Int Grad Sch, Inst Biopharmaceut & Hlth Engn iBHE,State Key Lab, Shenzhen Key Lab Gene & Antibody Therapy,State Ke, Shenzhen, Peoples R China

11.Guangdong Acad Agr Sci, Environm Hort Res Inst, Guangdong Key Lab Ornamental Plant Germplasm Inno, Guangzhou, Peoples R China

12.Univ Pretoria, Dept Biochem Genet & Microbiol, Pretoria, South Africa

13.Nanjing Agr Univ, Acad Adv Interdisciplinary Studies, Coll Hort, Nanjing, Peoples R China

14.Shaoguan Univ, Henry Fok Coll Biol & Agr, Shaoguan, Peoples R China

15.Shandong Acad Agr Sci, Inst Vegetable & Flowers, Jinan, Peoples R China

期刊名称：HORTICULTURE RESEARCH （ 影响因子：6.793； 五年影响因子：6.589 ）

ISSN： 2662-6810

年卷期： 2021 年 8 卷 1 期

页码：

收录情况： SCI

摘要： The marvelously diverse Orchidaceae constitutes the largest family of angiosperms. The genus Cymbidium in Orchidaceae is well known for its unique vegetation, floral morphology, and flower scent traits. Here, a chromosome-scale assembly of the genome of Cymbidium ensifolium (Jianlan) is presented. Comparative genomic analysis showed that C. ensifolium has experienced two whole-genome duplication (WGD) events, the most recent of which was shared by all orchids, while the older event was the tau event shared by most monocots. The results of MADS-box genes analysis provided support for establishing a unique gene model of orchid flower development regulation, and flower shape mutations in C. ensifolium were shown to be associated with the abnormal expression of MADS-box genes. The most abundant floral scent components identified included methyl jasmonate, acacia alcohol and linalool, and the genes involved in the floral scent component network of C. ensifolium were determined. Furthermore, the decreased expression of photosynthesis-antennae and photosynthesis metabolic pathway genes in leaves was shown to result in colorful striped leaves, while the increased expression of MADS-box genes in leaves led to perianth-like leaves. Our results provide fundamental insights into orchid evolution and diversification.

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