The extremely reduced, diverged and reconfigured plastomes of the largest mycoheterotrophic orchid lineage

doi:10.1186/s12870-022-03836-x

CORC > 植物研究所 > 中国科学院植物研究所 > 系统与进化植物学国家重点实验室

	The extremely reduced, diverged and reconfigured plastomes of the largest mycoheterotrophic orchid lineage
	Wen, Yingying 4; Qin, Ying 3; Shao, Bingyi ; Li, Jianwu 2; Ma, Chongbo ; Liu, Yan 3; Yang, Boyun 4; Jin, Xiaohua
刊名	BMC PLANT BIOLOGY
	2022
卷号	22 期号:1
关键词	Gastrodieae Didymoplexis Plastomes GC contents ycf1 Substitution rates
ISSN号	1471-2229
DOI	10.1186/s12870-022-03836-x
文献子类	Article
英文摘要	Background Plastomes of heterotrophic plants have been greatly altered in structure and gene content, owing to the relaxation of selection on photosynthesis-related genes. The orchid tribe Gastrodieae is the largest and probably the oldest mycoheterotrophic clade of the extant family Orchidaceae. To characterize plastome evolution across members of this key important mycoheterotrophic lineage, we sequenced and analyzed the plastomes of eleven Gastrodieae members, including representative species of two genera, as well as members of the sister group Nervilieae. Results The plastomes of Gastrodieae members contain 20 protein-coding, four rRNA and five tRNA genes. Evolutionary analysis indicated that all rrn genes were transferred laterally and together, forming an rrn block in the plastomes of Gastrodieae. The plastome GC content of Gastrodia species ranged from 23.10% (G. flexistyla) to 25.79% (G. javanica). The plastome of Didymoplexis pallens contains two copies each of ycf1 and ycf2. The synonymous and nonsynonymous substitution rates were very high in the plastomes of Gastrodieae among mycoheterotrophic species in Orchidaceae and varied between genes. Conclusions The plastomes of Gastrodieae are greatly reduced and characterized by low GC content, rrn block formation, lineage-specific reconfiguration and gene content, which might be positively selected. Overall, the plastomes of Gastrodieae not only serve as an excellent model for illustrating the evolution of plastomes but also provide new insights into plastome evolution in parasitic plants.
学科主题	Plant Sciences
出版地	LONDON
WOS关键词	PLASTID GENOME ; PHYLOGENETIC ANALYSIS ; EPIDENDROIDEAE ; GASTRODIEAE ; EVOLUTION ; SEQUENCE ; SELECTION ; SOFTWARE ; TRIBE
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	BMC
WOS记录号	WOS:000855443800001
资助机构	National Natural Science Foundation of China [31870195, 32160050]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/28731]
专题	系统与进化植物学国家重点实验室
作者单位	1.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Menglun Township 666303, Yunnan, Peoples R China 2.Guangxi Zhuang Autonomous Reg & Chinese Acad Sci, Guangxi Inst Bot, Guilin 541006, Guangxi, Peoples R China 3.Nanchang Univ, Sch Life Sci, Nanchang 330031, Jiangxi, Peoples R China 4.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China
推荐引用方式 GB/T 7714	Wen, Yingying,Qin, Ying,Shao, Bingyi,et al. The extremely reduced, diverged and reconfigured plastomes of the largest mycoheterotrophic orchid lineage[J]. BMC PLANT BIOLOGY,2022,22(1).
APA	Wen, Yingying.,Qin, Ying.,Shao, Bingyi.,Li, Jianwu.,Ma, Chongbo.,...&Jin, Xiaohua.(2022).The extremely reduced, diverged and reconfigured plastomes of the largest mycoheterotrophic orchid lineage.BMC PLANT BIOLOGY,22(1).
MLA	Wen, Yingying,et al."The extremely reduced, diverged and reconfigured plastomes of the largest mycoheterotrophic orchid lineage".BMC PLANT BIOLOGY 22.1(2022).