Lineage-Specific Reductions of Plastid Genomes in an Orchid Tribe with Partially and Fully Mycoheterotrophic Species

doi:10.1093/gbe/evw144

	Lineage-Specific Reductions of Plastid Genomes in an Orchid Tribe with Partially and Fully Mycoheterotrophic Species
	Feng, Yan-Lei; Wicke, Susann; Li, Jian-Wu; Han, Yu; Lin, Choun-Sea; Li, De-Zhu; Zhou, Ting-Ting; Huang, Wei-Chang; Huang, Lu-Qi; Jin, Xiao-Hua
	2016-07-01
发表期刊	GENOME BIOLOGY AND EVOLUTION
卷号	8 期号:7 页码:2164-2175
摘要	The plastid genome (plastome) of heterotrophic plants like mycoheterotrophs and parasites shows massive gene losses in consequence to the relaxation of functional constraints on photosynthesis. To understand the patterns of this convergent plastome reduction syndrome in heterotrophic plants, we studied 12 closely related orchids of three different lifeforms from the tribe Neottieae (Orchidaceae). We employ a comparative genomics approach to examine structural and selectional changes in plastomes within Neottieae. Both leafy and leafless heterotrophic species have functionally reduced plastid genome. Our analyses show that genes for the NAD(P)H dehydrogenase complex, the photosystems, and the RNA polymerase have been lost functionally multiple times independently. The physical reduction proceeds in a highly lineage-specific manner, accompanied by structural reconfigurations such as inversions or modifications of the large inverted repeats. Despite significant but minor selectional changes, all retained genes continue to evolve under purifying selection. All leafless Neottia species, including both visibly green and nongreen members, are fully mycoheterotrophic, likely evolved from leafy and partially mycoheterotrophic species. The plastomes of Neottieae span many stages of plastome degradation, including the longest plastome of a mycoheterotroph, providing invaluable insights into the mechanisms of plastome evolution along the transition from autotrophy to full mycoheterotrophy.
关键词	Heterotrophy Plastid Genome Reduction Neottieae Orchidaceae Relaxed Selection
DOI	10.1093/gbe/evw144
收录类别	SCI
语种	英语
WOS记录号	WOS:000381502000008
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/28573
专题	中国科学院东亚植物多样性与生物地理学重点实验室
推荐引用方式 GB/T 7714	Feng, Yan-Lei,Wicke, Susann,Li, Jian-Wu,et al. Lineage-Specific Reductions of Plastid Genomes in an Orchid Tribe with Partially and Fully Mycoheterotrophic Species[J]. GENOME BIOLOGY AND EVOLUTION,2016,8(7):2164-2175.
APA	Feng, Yan-Lei.,Wicke, Susann.,Li, Jian-Wu.,Han, Yu.,Lin, Choun-Sea.,...&Jin, Xiao-Hua.(2016).Lineage-Specific Reductions of Plastid Genomes in an Orchid Tribe with Partially and Fully Mycoheterotrophic Species.GENOME BIOLOGY AND EVOLUTION,8(7),2164-2175.
MLA	Feng, Yan-Lei,et al."Lineage-Specific Reductions of Plastid Genomes in an Orchid Tribe with Partially and Fully Mycoheterotrophic Species".GENOME BIOLOGY AND EVOLUTION 8.7(2016):2164-2175.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
gbe.evw144.full.pdf（1102KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	浏览下载