Sequencing of the plastome in the leafless green mycoheterotroph Cymbidium macrorhizon helps us to understand an early stage of fully mycoheterotrophic plastome structure
Kim, Hyoung T.1; Shin, Chang-Ho2; Sun, Hang3; Kim, Joo-Hwan4
2018-02-01
发表期刊PLANT SYSTEMATICS AND EVOLUTION
ISSN0378-2697
卷号304页码:245-258
摘要

To date, plastome studies of mycoheterotrophic orchids have focused on nongreen mycoheterotrophic or partially mycoheterotrophic species. Cymbidium macrorhizon is a fully mycoheterotrophic orchid that lacks leaves and roots, although its inflorescence rachis is pale green. It has degraded stomata, specific fungal partners, and high concentrations of heavy stable nitrogen and carbon isotopes. Therefore, the plastome of this species is expected to represent an early stage of a fully mycoheterotrophic plastome. In this study, we sequenced the plastomes of C. macrorhizon and closely related species (C. ensifolium, C. kanran, and C. lancifolium). Plastomes of the four Cymbidium species were almost identical structurally, but differed somewhat from those of previously studied species. The genes for the photosynthetic subunits of NADH dehydrogenase, ndhF and ndhH, were absent from all four newly sequenced plastomes, whereas only ndhJ was absent from C. ensifolium. In section Pachyrhizanthe (C. lancifolium and C. macrorhizon), ndhE, ndhI, and ndhJ were pseudogenized. With the exception of ndh and ycf, 64 protein-coding genes in C. macrorhizon were apparently functional. Most of them were highly conserved and under purifying selection. Therefore, no direct evidence is available to suggest that genes related to photosynthesis have lost their functions in C. macrorhizon. This discordance between molecular and physiological features for the trophic status of C. macrorhizon might result from a lag between photosynthetic function loss and relaxed purifying selection.

关键词Cymbidium Macrorhizon Mycoheterotroph Ndh Genes Plastome Degradation
语种英语
引用统计
文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/60593
专题植物化学与西部植物资源持续利用国家重点实验室
作者单位1.Kyungpook Natl Univ, Dept Hort Sci, Daegu 41566, South Korea
2.Korea Natl Arboretum, Div Forest Biodivers & Herbarium, Pochon 11186, Gyeonggi Do, South Korea
3.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming 650201, Yunnan, Peoples R China
4.Gachon Univ, Dept Life Sci, Seongnam 13120, Gyeonggi Do, South Korea
推荐引用方式
GB/T 7714
Kim, Hyoung T.,Shin, Chang-Ho,Sun, Hang,et al. Sequencing of the plastome in the leafless green mycoheterotroph Cymbidium macrorhizon helps us to understand an early stage of fully mycoheterotrophic plastome structure[J]. PLANT SYSTEMATICS AND EVOLUTION,2018,304(2):245-258.
APA Kim, Hyoung T.,Shin, Chang-Ho,Sun, Hang,&Kim, Joo-Hwan.(2018).Sequencing of the plastome in the leafless green mycoheterotroph Cymbidium macrorhizon helps us to understand an early stage of fully mycoheterotrophic plastome structure.PLANT SYSTEMATICS AND EVOLUTION,304(2),245-258.
MLA Kim, Hyoung T.,et al."Sequencing of the plastome in the leafless green mycoheterotroph Cymbidium macrorhizon helps us to understand an early stage of fully mycoheterotrophic plastome structure".PLANT SYSTEMATICS AND EVOLUTION 304.2(2018):245-258.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Kim, Hyoung T.]的文章
[Shin, Chang-Ho]的文章
[Sun, Hang]的文章
百度学术
百度学术中相似的文章
[Kim, Hyoung T.]的文章
[Shin, Chang-Ho]的文章
[Sun, Hang]的文章
必应学术
必应学术中相似的文章
[Kim, Hyoung T.]的文章
[Shin, Chang-Ho]的文章
[Sun, Hang]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。