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Concomitant loss of NDH complex-related genes withinchloroplast and nuclear genomes in some orchids University of Alberta

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Author or creator
Lin, C.
Chen, J.
Chiu, C.
Hsiao, H.
Yang, C.
Jin, X.
Leebens‐Mack, J.
Pamphilis, C.
Huang, Y.
Yang, L.
Chang, W.
Kui, L.
Wong, G.
Hu, J.
Wang, W.
Shih, M.
Additional contributors
Subject/Keyword
NDH complex
orchid
apostasia odorata
gene loss
photoautotrophic plant
Type of item
Journal Article (Published)
Language
English
Place
Time
Description
The chloroplast NAD(P)H dehydrogenase-like (NDH) complex consists of about 30 subunits from both thenuclear and chloroplast genomes and is ubiquitous across most land plants. In some orchids, such as Pha-laenopsis equestris, Dendrobium officinale and Dendrobium catenatum, most of the 11 chloroplast genome-encoded ndh genes (cp-ndh) have been lost. Here we investigated whether functional cp-ndh genes havebeen completely lost in these orchids or whether they have been transferred and retained in the nucleargenome. Further, we assessed whether both cp-ndh genes and nucleus-encoded NDH-related genes can belost, resulting in the absence of the NDH complex. Comparative analyses of the genome of Apostasia odor-ata, an orchid species with a complete complement of cp-ndh genes which represents the sister lineage toall other orchids, and three published orchid genome sequences for P. equestris, D. officinale and D. catena-tum, which are all missing cp-ndh genes, indicated that copies of cp-ndh genes are not present in any ofthese four nuclear genomes. This observation suggests that the NDH complex is not necessary for someplants. Comparative genomic/transcriptomic analyses of currently available plastid genome sequences andnuclear transcriptome data showed that 47 out of 660 photoautotrophic plants and all the heterotrophicplants are missing plastid-encoded cp-ndh genes and exhibit no evidence for maintenance of a functionalNDH complex. Our data indicate that the NDH complex can be lost in photoautotrophic plant species. Fur-ther, the loss of the NDH complex may increase the probability of transition from a photoautotrophic to aheterotrophic life history.
Date created
2017/03/04
DOI
doi:10.7939/R3Z60CG1X
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Attribution 4.0 International
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File title: Concomitant loss of NDH complex‐related genes within chloroplast and nuclear genomes in some orchids
File title: Concomitant loss of NDH complex‐related genes within chloroplast and nuclear genomes in some orchids
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