Mitochondrial genomes of the early land plant lineage liverworts (Marchantiophyta): conserved genome structure, and ongoing low frequency recombination

doi:10.1186/s12864-019-6365-y

	Mitochondrial genomes of the early land plant lineage liverworts (Marchantiophyta): conserved genome structure, and ongoing low frequency recombination
	Dong, Shanshan 1; Zhao, Chaoxian 2; Zhang, Shouzhou ; Zhang, Li ; Wu, Hong 1; Liu, Huan 3; Zhu, Ruiliang 2; Jia, Yu 4; Goffinet, Bernard 5; Liu, Yang 3
	2019
发表期刊	BMC GENOMICS
ISSN	1471-2164
卷号	20 期号:1
摘要	Background: In contrast to the highly labile mitochondrial (mt) genomes of vascular plants, the architecture and composition of mt genomes within the main lineages of bryophytes appear stable and invariant. The available mt genomes of 18 liverwort accessions representing nine genera and five orders are syntenous except for Gymnomitrion concinnatum whose genome is characterized by two rearrangements. Here, we expanded the number of assembled liverwort mt genomes to 47, broadening the sampling to 31 genera and 10 orders spanning much of the phylogenetic breadth of liverworts to further test whether the evolution of the liverwort mitogenome is overall static. Results: Liverwort mt genomes range in size from 147 Kb in Jungermanniales (clade B) to 185 Kb in Marchantiopsida, mainly due to the size variation of intergenic spacers and number of introns. All newly assembled liverwort mt genomes hold a conserved set of genes, but vary considerably in their intron content. The loss of introns in liverwort mt genomes might be explained by localized retroprocessing events. Liverwort mt genomes are strictly syntenous in genome structure with no structural variant detected in our newly assembled mt genomes. However, by screening the paired-end reads, we do find rare cases of recombination, which means multiple concurrent genome structures may exist in the vegetative tissues of liverworts. Our phylogenetic analyses of the nuclear encoded double stand break repair protein families revealed liverwort-specific subfamilies expansions. Conclusions: The low repeat recombination level, selection, along with the intensified nuclear surveillance, might together shape the structural evolution of liverwort mt genomes.
关键词	Bryophytes recombination structural evolution repeats introns
学科领域	Biotechnology & Applied Microbiology ; Genetics & Heredity
DOI	10.1186/s12864-019-6365-y
收录类别	SCI
语种	英语
WOS关键词	SEQUENCE ; PROTEIN ; DNA ; EVOLUTION ; SURVEILLANCE ; IMPROVEMENT ; ANGIOSPERM ; DIVERGENT ; ALIGNMENT
WOS研究方向	Biotechnology & Applied Microbiology ; Genetics & Heredity
WOS记录号	WOS:000508018900002
出版者	BMC
文献子类	Article
出版地	LONDON
资助机构	National Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31470314, 31600171]
作者邮箱	yang.liu0508@gmail.com
作品OA属性	Green Published, gold
引用统计	被引频次：20[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/19589
专题	系统与进化植物学国家重点实验室
作者单位	1.Shenzhen & Chinese Acad Sci, Fairy Lake Bot Garden, Lab Southern Subtrop Plant Divers, Shenzhen 518004, Peoples R China 2.South China Agr Univ, State Key Lab Conservat & Utilizat Subtrop Agrobi, Guangzhou 510642, Peoples R China 3.East China Normal Univ, Sch Life Sci, Dept Biol, Shanghai 200241, Peoples R China 4.BGI Shenzhen, Shenzhen 518083, Peoples R China 5.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China 6.Univ Connecticut, Dept Ecol & Evolutionary Biol, Storrs, CT 06269 USA
推荐引用方式 GB/T 7714	Dong, Shanshan,Zhao, Chaoxian,Zhang, Shouzhou,et al. Mitochondrial genomes of the early land plant lineage liverworts (Marchantiophyta): conserved genome structure, and ongoing low frequency recombination[J]. BMC GENOMICS,2019,20(1).
APA	Dong, Shanshan.,Zhao, Chaoxian.,Zhang, Shouzhou.,Zhang, Li.,Wu, Hong.,...&Liu, Yang.(2019).Mitochondrial genomes of the early land plant lineage liverworts (Marchantiophyta): conserved genome structure, and ongoing low frequency recombination.BMC GENOMICS,20(1).
MLA	Dong, Shanshan,et al."Mitochondrial genomes of the early land plant lineage liverworts (Marchantiophyta): conserved genome structure, and ongoing low frequency recombination".BMC GENOMICS 20.1(2019).

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