Chloroplast Genomes of the Green-Tide Forming Alga Ulva compressa: Comparative Chloroplast Genomics in the Genus Ulva (Ulvophyceae, Chlorophyta)

doi:10.3389/fmars.2021.668542

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	Chloroplast Genomes of the Green-Tide Forming Alga Ulva compressa: Comparative Chloroplast Genomics in the Genus Ulva (Ulvophyceae, Chlorophyta)
	Liu, Feng 1,2,3; Melton, James T.4
刊名	FRONTIERS IN MARINE SCIENCE
	2021-04-15
卷号	8 页码:18
关键词	chloroplast genome green tide Ulvophyceae green algae group I II intron intron-encoded protein
DOI	10.3389/fmars.2021.668542
通讯作者	Liu, Feng(liufeng@qdio.ac.cn)
英文摘要	To understand the evolution of Ulva chloroplast genomes at intraspecific and interspecific levels, in this study, three complete chloroplast genomes of Ulva compressa Linnaeus were sequenced and compared with the available Ulva cpDNA data. Our comparative analyses unveiled many noticeable findings. First, genome size variations of Ulva cpDNAs at intraspecific and interspecific levels were mainly caused by differences in gain or loss of group I/II introns, integration of foreign DNA fragments, and content of non-coding intergenic spacer regions. Second, chloroplast genomes of U. compressa shared the same 100 conserved genes as other Ulva cpDNA, whereas Ulva flexuosa appears to be the only Ulva species with the minD gene retained in its cpDNA. Third, five types of group I introns, most of which carry a LAGLIDADG or GIYYIG homing endonuclease, and three of group II introns, usually encoding a reverse transcriptase/maturase, were detected at 26 insertion sites of 14 host genes in the 23 Ulva chloroplast genomes, and many intron insertion-sites have been found for the first time in Chlorophyta. Fourth, one degenerate group II intron previously ignored has been detected in the infA genes of all Ulva species, but not in the closest neighbor, Pseudoneochloris marina, and the other chlorophycean taxa, indicating that it should be the result of an independent invasion event that occurred in a common ancestor of Ulva species. Finally, the seven U. compressa cpDNAs represented a novel gene order which was different from that of other Ulva cpDNAs. The structure of Ulva chloroplast genomes is not conserved, but remarkably plastic, due to multiple rearrangement events.
资助项目	Science and Technology Basic Resources Investigation Program of China[2018FY100200] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences[QYZDBSSWDQC023] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA23050302/XDA23050403] ; Major Scientific and Technological Innovation Project of Shandong Province[2019JZZY020706] ; National Natural Science Foundation of China[41876165] ; National Science Foundation (NSF) HB CU-UP[1436759]
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
语种	英语
出版者	FRONTIERS MEDIA SA
WOS记录号	WOS:000642498100001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/170847]
专题	海洋研究所_海洋生态与环境科学重点实验室
通讯作者	Liu, Feng
作者单位	1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China 2.Pilot Natl Lab Marine Sci & Technol Qingdao, Marine Ecol & Environm Sci Lab, Qingdao, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China 4.Spelman Coll, Atlanta, GA 30314 USA
推荐引用方式 GB/T 7714	Liu, Feng,Melton, James T.. Chloroplast Genomes of the Green-Tide Forming Alga Ulva compressa: Comparative Chloroplast Genomics in the Genus Ulva (Ulvophyceae, Chlorophyta)[J]. FRONTIERS IN MARINE SCIENCE,2021,8:18.
APA	Liu, Feng,&Melton, James T..(2021).Chloroplast Genomes of the Green-Tide Forming Alga Ulva compressa: Comparative Chloroplast Genomics in the Genus Ulva (Ulvophyceae, Chlorophyta).FRONTIERS IN MARINE SCIENCE,8,18.
MLA	Liu, Feng,et al."Chloroplast Genomes of the Green-Tide Forming Alga Ulva compressa: Comparative Chloroplast Genomics in the Genus Ulva (Ulvophyceae, Chlorophyta)".FRONTIERS IN MARINE SCIENCE 8(2021):18.