Evolution of the rpoB-psbZ region in fern plastid genomes: notable structural rearrangements and highly variable intergenic spacers

doi:10.1186/1471-2229-11-64

CORC > 武汉植物园 > 中国科学院武汉植物园

	Evolution of the rpoB-psbZ region in fern plastid genomes: notable structural rearrangements and highly variable intergenic spacers
	Gao, Lei 1; Zhou, Yuan 1; Wang, Ting 1; Su, Ying-Juan 2; Wang, Zhi-Wei 1
刊名	BMC PLANT BIOLOGY
	2011-04-13
卷号	11 页码:13
ISSN号	1471-2229
DOI	10.1186/1471-2229-11-64
英文摘要	Background: The rpoB-psbZ (BZ) region of some fern plastid genomes (plastomes) has been noted to go through considerable genomic changes. Unraveling its evolutionary dynamics across all fern lineages will lead to clarify the fundamental process shaping fern plastome structure and organization. Results: A total of 24 fern BZ sequences were investigated with taxon sampling covering all the extant fern orders. We found that: (i) a tree fern Plagiogyria japonica contained a novel gene order that can be generated from either the ancestral Angiopteris type or the derived Adiantum type via a single inversion; (ii) the trnY-trnE intergenic spacer (IGS) of the filmy fern Vandenboschia radicans was expanded 3-fold due to the tandem 27-bp repeats which showed strong sequence similarity with the anticodon domain of trnY; (iii) the trnY-trnE IGSs of two horsetail ferns Equisetum ramosissimum and E. arvense underwent an unprecedented 5-kb long expansion, more than a quarter of which was consisted of a single type of direct repeats also relevant to the trnY anticodon domain; and (iv) ycf66 has independently lost at least four times in ferns. Conclusions: Our results provided fresh insights into the evolutionary process of fern BZ regions. The intermediate BZ gene order was not detected, supporting that the Adiantum type was generated by two inversions occurring in pairs. The occurrence of Vandenboschia 27-bp repeats represents the first evidence of partial tRNA gene duplication in fern plastomes. Repeats potentially forming a stem-loop structure play major roles in the expansion of the trnY-trnE IGS.
资助项目	Chinese Academy of Sciences[KSCX2-YW-Z-0940] ; National Natural Science Foundation of China[30970290] ; National Natural Science Foundation of China[31070594] ; [31000171]
WOS研究方向	Plant Sciences
语种	英语
出版者	BIOMED CENTRAL LTD
WOS记录号	WOS:000290817500001
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/876]
专题	中国科学院武汉植物园
通讯作者	Su, Ying-Juan
作者单位	1.Chinese Acad Sci, Wuhan Bot Garden, CAS Key Lab Plant Germplasm Enhancement & Special, Wuhan 430074, Peoples R China 2.Sun Yat Sen Univ, Sch Life Sci, State Key Lab Biocontrol, Guangzhou 510275, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Gao, Lei,Zhou, Yuan,Wang, Ting,et al. Evolution of the rpoB-psbZ region in fern plastid genomes: notable structural rearrangements and highly variable intergenic spacers[J]. BMC PLANT BIOLOGY,2011,11:13.
APA	Gao, Lei,Zhou, Yuan,Wang, Ting,Su, Ying-Juan,&Wang, Zhi-Wei.(2011).Evolution of the rpoB-psbZ region in fern plastid genomes: notable structural rearrangements and highly variable intergenic spacers.BMC PLANT BIOLOGY,11,13.
MLA	Gao, Lei,et al."Evolution of the rpoB-psbZ region in fern plastid genomes: notable structural rearrangements and highly variable intergenic spacers".BMC PLANT BIOLOGY 11(2011):13.