Intracellular symbiosis of algae with possible involvement of mitochondrial dynamics

Abstract Algal endosymbiosis is widely present among eukaryotes including many protists and metazoans. However, the mechanisms involved in their interactions between host and symbiont remain unclear. Here, we used electron microscopy and three-dimensional reconstruction analyses to examine the ultra...

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Autores principales:	Chihong Song, Kazuyoshi Murata, Toshinobu Suzaki
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/42b7714284674d869b690d7bfa884d77
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spelling	oai:doaj.org-article:42b7714284674d869b690d7bfa884d772021-12-02T12:30:17ZIntracellular symbiosis of algae with possible involvement of mitochondrial dynamics10.1038/s41598-017-01331-02045-2322https://doaj.org/article/42b7714284674d869b690d7bfa884d772017-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01331-0https://doaj.org/toc/2045-2322Abstract Algal endosymbiosis is widely present among eukaryotes including many protists and metazoans. However, the mechanisms involved in their interactions between host and symbiont remain unclear. Here, we used electron microscopy and three-dimensional reconstruction analyses to examine the ultrastructural interactions between the symbiotic zoochlorella and the organelles in the host Paramecium bursaria, which is a model system of endosymbiosis. Although in chemically fixed samples the symbiotic algae show no direct structural interactions with the host organelles and the perialgal vacuole membrane (PVM), in cryofixed P. bursaria samples the intimate connections were identified between the host mitochondria and the symbiotic algae via the PVM. The PVM was closely apposed to the cell wall of the symbiotic algae and in some places it showed direct contacts to the host mitochondrial membrane and the cell wall of the symbiotic algae. Further, the PVM-associated mitochondria formed a mitochondrial network and were also connected to host ER. Our observations propose a new endosymbiotic systems between the host eukaryotes and the symbionts where the benefiting symbiosis is performed through intimate interactions and an active structural modification in the host organelles.Chihong SongKazuyoshi MurataToshinobu SuzakiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Chihong Song Kazuyoshi Murata Toshinobu Suzaki Intracellular symbiosis of algae with possible involvement of mitochondrial dynamics
description	Abstract Algal endosymbiosis is widely present among eukaryotes including many protists and metazoans. However, the mechanisms involved in their interactions between host and symbiont remain unclear. Here, we used electron microscopy and three-dimensional reconstruction analyses to examine the ultrastructural interactions between the symbiotic zoochlorella and the organelles in the host Paramecium bursaria, which is a model system of endosymbiosis. Although in chemically fixed samples the symbiotic algae show no direct structural interactions with the host organelles and the perialgal vacuole membrane (PVM), in cryofixed P. bursaria samples the intimate connections were identified between the host mitochondria and the symbiotic algae via the PVM. The PVM was closely apposed to the cell wall of the symbiotic algae and in some places it showed direct contacts to the host mitochondrial membrane and the cell wall of the symbiotic algae. Further, the PVM-associated mitochondria formed a mitochondrial network and were also connected to host ER. Our observations propose a new endosymbiotic systems between the host eukaryotes and the symbionts where the benefiting symbiosis is performed through intimate interactions and an active structural modification in the host organelles.
format	article
author	Chihong Song Kazuyoshi Murata Toshinobu Suzaki
author_facet	Chihong Song Kazuyoshi Murata Toshinobu Suzaki
author_sort	Chihong Song
title	Intracellular symbiosis of algae with possible involvement of mitochondrial dynamics
title_short	Intracellular symbiosis of algae with possible involvement of mitochondrial dynamics
title_full	Intracellular symbiosis of algae with possible involvement of mitochondrial dynamics
title_fullStr	Intracellular symbiosis of algae with possible involvement of mitochondrial dynamics
title_full_unstemmed	Intracellular symbiosis of algae with possible involvement of mitochondrial dynamics
title_sort	intracellular symbiosis of algae with possible involvement of mitochondrial dynamics
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/42b7714284674d869b690d7bfa884d77
work_keys_str_mv	AT chihongsong intracellularsymbiosisofalgaewithpossibleinvolvementofmitochondrialdynamics AT kazuyoshimurata intracellularsymbiosisofalgaewithpossibleinvolvementofmitochondrialdynamics AT toshinobusuzaki intracellularsymbiosisofalgaewithpossibleinvolvementofmitochondrialdynamics
_version_	1718394393607536640

Intracellular symbiosis of algae with possible involvement of mitochondrial dynamics

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