Ultrastructural observations of mitochondrial morphology through the life cycle of the brown alga, Mutiomo cylindricus (Cutleriaceae, Tilopteridales)

Shen, Yuan; Motomura, Taizo; Nagasato, Chikako

Ultrastructural observations of mitochondrial morphology through the life cycle of the brown alga, Mutiomo cylindricus (Cutleriaceae, Tilopteridales)

Shen, Yuan; Motomura, Taizo; Nagasato, Chikako

Protoplasma, 2021, 259(2), 371-383

Permalink : https://hdl.handle.net/2115/85933

このアイテムのアクセス数:395件（2026-03-15 18:59 集計）

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論文情報

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アクセス権	open access
URI	https://hdl.handle.net/2115/85933
タイトル	Ultrastructural observations of mitochondrial morphology through the life cycle of the brown alga, Mutiomo cylindricus (Cutleriaceae, Tilopteridales)
著者	Shen, Yuan ; Motomura, Taizo ; Nagasato, Chikako
著者名 Shen, Yuan
e-Rad_Researcher 30183974 著者名 Motomura, Taizo
e-Rad_Researcher 00374710 著者名 Nagasato, Chikako
言語	英語
キーワード	Brown algae
	Electron microscopy
	Life cycle
	Mitochondria
	Serial section tomography
発行日	2021-06-17
出版者	Springer
収録物名	Protoplasma
巻(号)	259(2)
ページ	371-383
抄録	Mitochondrial morphology varies according to development and the physiological conditions of the cell. Here, we performed electron tomography using serial sections to analyze the number, individual volume, and morphological complexity of mitochondria in the cells across two generations in the life cycle of the brown alga Mutimo cylindricus. This species shows a heteromorphic alternation of generations between the macroscopic gametophyte and the crustose sporophyte during its life cycle and displays anisogamous sexual reproduction. We observed the mitochondria in the vegetative cells of gametophytes and sporophytes to mainly show tubular or discoidal shapes with high morphological complexity. The morphology of the mitochondria in the male and female gametes changed to a nearly spherical or oval shape from a tubular or discoidal shape before release. In this species, degradation of the paternal mitochondria was observed in the zygote 2 h after fertilization. Morphological changes in the mitochondria were not observed until 6 h after fertilization. Twenty-four-hour-old zygotes before and after cytokinesis showed a similar number of mitochondria as 6-h-old zygotes; however, the volume and morphological complexity increased. The results indicated that the maternal mitochondria did not undergo fission or fusion until this stage. Based on the analysis results of the number and total volume of mitochondria before and after the release of the gametes, it is possible that the mitochondria in the female gametes fuse immediately before release.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	This is a post-peer-review, pre-copyedit version of an article published in Protoplasma. The final authenticated version is available online at: http://dx.doi.org/10.1007/s00709-021-01679-1
PISSN	0033-183X
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1007/s00709-021-01679-1