Cytoplasmic inheritance of mitochondria and chloroplasts in the anisogamous brown alga Mutimo cylindricus (Phaeophyceae)

Shen, Yuan; Iwao, Toyoki; Motomura, Taizo; Nagasato, Chikako

doi:10.1007/s00709-020-01540-x

Cited by 2 publications

(7 citation statements)

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“…In a previous study, we clarified paternal inheritance of mitochondria in the anisogamous brown alga Mutimo cylindricus (Shen et al 2020). We concluded that maternal inheritance of mitochondria could be universal in brown algae.…”

Section: Introductionmentioning

confidence: 89%

“…Male and female individuals were identified based on the morphology of the plurilocular gametangia under a light microscope. Unialgal cultures of M. cylindricus were established from gametes or trichothallic hairs of male and female gametophytes (Shen et al 2020) and incubated in sterilized seawater containing half-strength Provasoil's enriched seawater medium (Provasoil 1968). Gametogenesis and maturation were induced under the following conditions: 15 °C, using white-light-emitting diodes (LEDs, μmol photons m -2 s -1 ) and long-day conditions (14 h light:10 h dark).…”

Section: Culturementioning

confidence: 99%

“…The disappearance of parental mitochondria in 2-h-old zygotes was observed (Shen et al 2020). Mitochondrial morphology was examined in 2-and 6-h-old zygotes to compare the configuration of the maternal mitochondria during or after the disappearance of the paternal mitochondria (Fig.…”

Section: Mitochondrial Morphology In Early Sporophytesmentioning

confidence: 99%

“…4, Supplementary Movie S7, S8). Fertilization was confirmed by the number of eyespots on the chloroplasts derived from male and female gametes (Shen et al 2020). Two eyespots were maintained until the formation of seven-celled sporophytes.…”

Section: Mitochondrial Morphology In Early Sporophytesmentioning

confidence: 99%

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

2021

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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 six-hour-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.

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Section: Introductionmentioning

confidence: 89%

Section: Culturementioning

confidence: 99%

Section: Mitochondrial Morphology In Early Sporophytesmentioning

confidence: 99%

Section: Mitochondrial Morphology In Early Sporophytesmentioning

confidence: 99%

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

2021

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“…Like in animals, inheritance of mitochondrial genes passes through the mother. While the authors had shown mitophagy to be partially responsible for the matrilinear inheritance of mitochondrial genes (Shen et al 2021 ), they still wanted to understand how the maternal mitochondria are passed on in such a robust manner. By using high-quality, also aesthetically appealing, electron tomography, they can now visualise the dynamic morphological changes of mitochondria through two generations of the life cycle.…”

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confidence: 99%

Is a genome more than its genes?

Nick

2022

Protoplasma

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Cytoplasmic inheritance of mitochondria and chloroplasts in the anisogamous brown alga Mutimo cylindricus (Phaeophyceae)

Cited by 2 publications

References 47 publications

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

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

Is a genome more than its genes?

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