Understanding the Evolution of Mitochondrial Genomes in the Green Macroalgal Genus Ulva (Ulvophyceae, Chlorophyta)

doi:10.3389/fmars.2022.850710

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	Understanding the Evolution of Mitochondrial Genomes in the Green Macroalgal Genus Ulva (Ulvophyceae, Chlorophyta)
	Liu, Feng 1,2,3; Melton III, James T.5; Wang, Hongshu 1,2,3; Wang, Jing 1,2,3; Lopez-Bautista, Juan M.4
刊名	FRONTIERS IN MARINE SCIENCE
	2022-03-16
卷号	9 页码:19
关键词	mitochondrial genome Ulvophyceae green algae group I II intron DNA-directed RNA polymerase mitochondrial 5S rRNA
DOI	10.3389/fmars.2022.850710
通讯作者	Liu, Feng(liufeng@qdio.ac.cn)
英文摘要	To gain more insights into the evolution of mitochondrial genomes (mitogenomes or mtDNAs) in the green macroalgal genus Ulva (Ulvophyceae, Chlorophyta), we sequenced seven Ulva mitogenomes from six species as well as one Percursaria mitogenome as outgroup, and compared them with the available Ulva mtDNA data. Our comparative analyses unveiled many novel findings. First, the Ulva mitogenomes shared a total of 62 core genes including 29 protein-coding genes (PCGs), three ribosomal RNA genes (rRNAs), 26 transfer RNA genes (tRNAs), three conserved free-standing open reading frames (orfs), and one putative RNA subunit of RNase P (rnpB). The rrn5 gene previously unrecognized is present in all sequenced ulvalean mitogenomes, which is situated between trnG(ucc) and trnW(cca). Second, the evolution of tRNAs in Ulva mitogenomes is related to different processes, including duplication, transposition, remolding, degeneration, loss and recruitment of tRNAs. The duplication of three tRNAs, i.e., trnT1(ugu), trnI1(gau), and trnM2(cau), was observed in Ulva mitogenomes. Third, the DNA-directed RNA polymerases (rpos), belonging to single-subunit DNA-dependent RNA polymerase (ssRNAP) family, are common in ulvalean mitogenomes. A total of three full-length and 55 split rpos have been detected in these 33 ulvalean mitogenomes. Fourth, six types of group I/II introns are detected at 29 insertion sites which are related to seven host genes (atp1, cox1, cox2, nad3, nad5, rnl, and rns) in these ulvalean mitogenomes. One group IB intron, i.e., intron cox1-214 which carried a GIY-YIG homing endonuclease (GHE), was observed for the first time in Ulva organelle genomes. Finally, phylogenomic analyses based on mitogenome dataset showed that the Ulva was split into two sister clades, representing Ulva lineage I and II, which was consistent to the results based on plastid genome dataset. Our study provides more important findings to better understand the evolution of mitochondrial genome in green algae.
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:000777707100001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/178816]
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.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 3.Pilot Natl Lab Marine Sci & Technol Qingdao, Marine Ecol & Environm Sci Lab, Qingdao, Peoples R China 4.Univ Alabama, Dept Biol Sci, Tuscaloosa, AL USA 5.Spelman Coll, Atlanta, GA USA
推荐引用方式 GB/T 7714	Liu, Feng,Melton III, James T.,Wang, Hongshu,et al. Understanding the Evolution of Mitochondrial Genomes in the Green Macroalgal Genus Ulva (Ulvophyceae, Chlorophyta)[J]. FRONTIERS IN MARINE SCIENCE,2022,9:19.
APA	Liu, Feng,Melton III, James T.,Wang, Hongshu,Wang, Jing,&Lopez-Bautista, Juan M..(2022).Understanding the Evolution of Mitochondrial Genomes in the Green Macroalgal Genus Ulva (Ulvophyceae, Chlorophyta).FRONTIERS IN MARINE SCIENCE,9,19.
MLA	Liu, Feng,et al."Understanding the Evolution of Mitochondrial Genomes in the Green Macroalgal Genus Ulva (Ulvophyceae, Chlorophyta)".FRONTIERS IN MARINE SCIENCE 9(2022):19.