Evidence of mitochondrial DNA in the chloroplast genome of Convallaria keiskei and its subsequent evolution in the Asparagales

Abstract DNA transfer between internal organelles such as the nucleus, mitochondrion, and plastid is a well-known phenomenon in plant evolution, and DNA transfer from the plastid and mitochondrion to the nucleus, from the plastid to the mitochondrion, and from the nucleus to the mitochondrion has be...

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Main Authors:	Gurusamy Raman, Seongjun Park, Eun Mi Lee, SeonJoo Park
Format:	article
Language:	EN
Published:	Nature Portfolio 2019
Subjects:	Medicine R Science Q
Online Access:	https://doaj.org/article/63676dda77fb43aea0365f7b742b2efa
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spelling	oai:doaj.org-article:63676dda77fb43aea0365f7b742b2efa2021-12-02T15:09:24ZEvidence of mitochondrial DNA in the chloroplast genome of Convallaria keiskei and its subsequent evolution in the Asparagales10.1038/s41598-019-41377-w2045-2322https://doaj.org/article/63676dda77fb43aea0365f7b742b2efa2019-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-41377-whttps://doaj.org/toc/2045-2322Abstract DNA transfer between internal organelles such as the nucleus, mitochondrion, and plastid is a well-known phenomenon in plant evolution, and DNA transfer from the plastid and mitochondrion to the nucleus, from the plastid to the mitochondrion, and from the nucleus to the mitochondrion has been well-documented in angiosperms. However, evidence of the transfer of mitochondrial DNA (mtDNA) to the plastid has only been found in three dicotyledons and one monocotyledon. In the present study, we characterised and analysed two chloroplast (cp) genome sequences of Convallaria keiskei and Liriope spicata, and found that C. keiskei has the largest cp genome (162,109 bp) in the Asparagaceae. Interestingly, C. keiskei had a ~3.3-kb segment of mtDNA in its cp genome and showed similarity with the mt gene rpl10 as a pseudogene. Further analyses revealed that mtDNA transfer only occurred in C. keiskei in the Nolinoideae, which diverged very recently (7.68 million years ago (mya); 95% highest posterior density (HPD): 14.55–2.97 mya). These findings indicate that the C. keiskei cp genome is unique amongst monocotyledon land plants, but further work is necessary to understand the direction and mechanism involved in the uptake of mtDNA by the plastid genome of C. keiskei.Gurusamy RamanSeongjun ParkEun Mi LeeSeonJoo ParkNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-11 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Gurusamy Raman Seongjun Park Eun Mi Lee SeonJoo Park Evidence of mitochondrial DNA in the chloroplast genome of Convallaria keiskei and its subsequent evolution in the Asparagales
description	Abstract DNA transfer between internal organelles such as the nucleus, mitochondrion, and plastid is a well-known phenomenon in plant evolution, and DNA transfer from the plastid and mitochondrion to the nucleus, from the plastid to the mitochondrion, and from the nucleus to the mitochondrion has been well-documented in angiosperms. However, evidence of the transfer of mitochondrial DNA (mtDNA) to the plastid has only been found in three dicotyledons and one monocotyledon. In the present study, we characterised and analysed two chloroplast (cp) genome sequences of Convallaria keiskei and Liriope spicata, and found that C. keiskei has the largest cp genome (162,109 bp) in the Asparagaceae. Interestingly, C. keiskei had a ~3.3-kb segment of mtDNA in its cp genome and showed similarity with the mt gene rpl10 as a pseudogene. Further analyses revealed that mtDNA transfer only occurred in C. keiskei in the Nolinoideae, which diverged very recently (7.68 million years ago (mya); 95% highest posterior density (HPD): 14.55–2.97 mya). These findings indicate that the C. keiskei cp genome is unique amongst monocotyledon land plants, but further work is necessary to understand the direction and mechanism involved in the uptake of mtDNA by the plastid genome of C. keiskei.
format	article
author	Gurusamy Raman Seongjun Park Eun Mi Lee SeonJoo Park
author_facet	Gurusamy Raman Seongjun Park Eun Mi Lee SeonJoo Park
author_sort	Gurusamy Raman
title	Evidence of mitochondrial DNA in the chloroplast genome of Convallaria keiskei and its subsequent evolution in the Asparagales
title_short	Evidence of mitochondrial DNA in the chloroplast genome of Convallaria keiskei and its subsequent evolution in the Asparagales
title_full	Evidence of mitochondrial DNA in the chloroplast genome of Convallaria keiskei and its subsequent evolution in the Asparagales
title_fullStr	Evidence of mitochondrial DNA in the chloroplast genome of Convallaria keiskei and its subsequent evolution in the Asparagales
title_full_unstemmed	Evidence of mitochondrial DNA in the chloroplast genome of Convallaria keiskei and its subsequent evolution in the Asparagales
title_sort	evidence of mitochondrial dna in the chloroplast genome of convallaria keiskei and its subsequent evolution in the asparagales
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/63676dda77fb43aea0365f7b742b2efa
work_keys_str_mv	AT gurusamyraman evidenceofmitochondrialdnainthechloroplastgenomeofconvallariakeiskeianditssubsequentevolutionintheasparagales AT seongjunpark evidenceofmitochondrialdnainthechloroplastgenomeofconvallariakeiskeianditssubsequentevolutionintheasparagales AT eunmilee evidenceofmitochondrialdnainthechloroplastgenomeofconvallariakeiskeianditssubsequentevolutionintheasparagales AT seonjoopark evidenceofmitochondrialdnainthechloroplastgenomeofconvallariakeiskeianditssubsequentevolutionintheasparagales
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Evidence of mitochondrial DNA in the chloroplast genome of Convallaria keiskei and its subsequent evolution in the Asparagales

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