Mitochondrial number and form change during autospore formation in Chlorococcum infusionum (Schrank) Meneghini (Chlorococcales, Chlorophyta)

Chida, Yukie; Ueda, Katsumi

doi:10.2216/i0031-8884-25-4-503.1

Cited by 11 publications

(6 citation statements)

References 4 publications

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“…First, red algal mitochondria label similar to other algae (e.g., Chida and Ueda 1986;Hatano and Ueda 1988;Hayashi and Ueda 1989;Tornbom and Oliveira 1993), although the red algal wall seems more difficult for these fluorescent stains to penetrate than in other algae. This problem was previously noted with entry of other labeling agents (Garbary and McDonald 1998), and was overcome with the use of concentrated seawater or glucuronidase.…”

Section: Discussionmentioning

confidence: 97%

“…As in previous studies (e.g., Chida and Ueda 1986), each labeled dot-like or regularly ovate structure was interpreted as a single mitochondrion. Although larger, often irregularly shaped structures were counted as single mitochondria, they were referred to as mitochondrial complexes (e.g., Chida and Ueda 1986;Hatano and Ueda 1988) and are interpreted as comprising a number of fused or aggregated organelles.…”

Section: Discussionmentioning

confidence: 99%

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Mitochondrial Dynamics in Red Algae. 3. Filament Apices in Colaconemacaespitosum (Acrochaetiales) and Antithamnion cruciatum (Ceramiales)

Garbary¹,

Zuchang²

2006

ALGAE

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Mitochondrial distribution and abundance were assessed during the growth of apical and subapical cells in the red algae Colaconema caespitosum (J. Agardh) Jackelman, Stegenga and Bolton and Antithamnion cruciatum (C. Agardh) Nägeli after staining with 3,3'-dihexyloxacarbocyanine iodide [DiOC 6 (3)] and 2,4'-dimethylaminostyryl-Nethylpyridinium iodide (DASPEI). In fully elongate apical cells of C. caespitosum there were 100-120 mitochondria. During apical cell enlargement and division there is a doubling and then halving of the mitochondrial numbers. Apical cells prior to cytokinesis in young filaments are smaller than in mature filaments (ca. 50 and 100 µm long, respectively) and have fewer mitochondria (ca. 100 and 120 mitochondria per cell, respectively). In older vegetative cells mitochondria tend to aggregate at opposite ends of the cells with some mitochondria associated with the central nucleus or at points of apparent branch initiation. There is a greater density of mitochondria in apical cells of smaller versus larger plants (one mitochondrion per 6.3 µm 3 and 9.8 µm 3 , respectively), suggesting that apical cells of younger plants may be more metabolically active. Male and female gametophytic thalli of Antithamnion cruciatum had similar numbers of mitochondria in apical cells of indeterminate axes, as did gametophytic and sporophytic thalli. There were about 40-50 mitochondria in fully elongated apical cells with about half this number in newly divided apical and subapical cells. Apical cells of determinate branches had more mitochondria (60-77) than indeterminate branches (60-70 vs. 40-50). In both species and in all cell types mitochondrial numbers were highly correlated with cell size.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Mitochondrial Dynamics in Red Algae. 3. Filament Apices in Colaconemacaespitosum (Acrochaetiales) and Antithamnion cruciatum (Ceramiales)

Garbary¹,

Zuchang²

2006

ALGAE

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“…It is unlikely that genetically different populations of mitochondria exist in single cells given the continuous fusion and fission activity of mitochondria (Chida and Ueda, 1986;Londsdale et al, 1988;Malcolm and Wetherbee, 1987). Exceptions could exist in cells where mitochondria are prevented from fusion, i.e., because they are fixed to a given position, or where they become segregated.…”

Section: Mitochondrial Dimorphismmentioning

confidence: 99%

“…Each network forms a layer from which branching tubules extend perpendicular to the network plane connecting the different network sheets with each other and with mitochondrial clusters at the fiber periphery. The significance of single giant mitochondria is emphasized by a widespread occurence of mitochondrial networks in a variety of cells [endothelial cells (Bereiter-Hahn, 1983) and fibroblasts in culture (Johnson et al, 1980), rat liver cells (Brandt et al, 19741, and unicellular algae (Blank and Arnold, 1981;Chida and Ueda, 1986; for further citations see Bereiter-Hahn, 199011. Skulachev and co-workers (Bakeeva et al, 1978;Skulachev, 1974) proposed that long mitochondria and/or a mitochondrial reticulum act as an intracellular cable, distributing mitochondrial energy.…”

Section: Mitochondrial Associations With Energy Consuming Structuresmentioning

confidence: 99%

Dynamics of mitochondria in living cells: Shape changes, dislocations, fusion, and fission of mitochondria

Bereiter‐Hahn

Vöth

1994

Microscopy Res & Technique

781

496

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Mitochondria are semi-autonomous organelles which are endowed with the ability to change their shape (e.g., by elongation, shortening, branching, buckling, swelling) and their location inside a living cell. In addition they may fuse or divide. These dynamics are discussed. Dislocation of mitochondria may result from their interaction with elements of the cytoskeleton, with microtubules in particular, and from processes intrinsic to the mitochondria themselves. Morphological criteria and differences in the fate of some mitochondria argue for the presence of more than one mitochondrial population in some animal cells. Whether these reflect genetic differences remains obscure. Emphasis is laid on the methods for visualizing mitochondria in cells and following their behaviour. Fluorescence methods provide unique possibilities because of their high resolving power and because some of the mitochondria-specific fluorochromes can be used to reveal the membrane potential. Fusion and fission often occur in short time intervals within the same group of mitochondria. At sites of fusion of two mitochondria material of the inner membrane, the matrix compartment seems to accumulate. The original arrangement of the fusion partners is maintained for some minutes. Fission is a dynamic event which, like fusion, in most cases observed in vertebrate cell cultures is not a straight forward process but rather requires several "trials" until the division finally occurs. Regarding fusion and fission hitherto unpublished phase contrast micrographs, and electron micrographs have been included.

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“…) や Euglena gracilis (Osafune et al 1975), Candida albicans (Tanaka and Kanbe 1985), Chlorococcum infusionum (Chida and Ueda. 1986) で報告されている．また Saccharomyces cerevisiae (Sando et al 1981), Physarum polycephalum (Nishibayashi et al 1987, Kawano et al1991, Chlamydomonas reinhardtii (Remacle et al1990 , Fujie et al 1993, Suzuki et al1996 …”

mentioning

confidence: 99%

Diversity of mitochondria and mitochondrial nuclei in the egg cell before and after the fertilization

Kuroiwa

2010

PL. MORPH.

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Summary:The preferential change of giant mitochondria and their nuclei in the egg cells of Pelargonium zonale Ait. was examined during megasporogenesis, megagametogenesis, and to the first zygote division stage after the fertilization by fluorescence microscopy after Technovit embedding and 4'6-diamidino-2-phenylindole (DAPI) staining, fluorometry for DNA content, using a video-intensified microscope photon-counting system (VIMPICS), and by three-dimensional reconstruction. The reproductive cells contained many small mitochondria (0.3µm in diameter) with a small amount of DNA (0.3Mbp). As the differentiation of embryo sac began, mitochondria and their nuclei in the egg cell underwent progressive enlargement and in the mature stage, made long thick strings or stack of 5~10 concentric rings (mtcomplex). There were 44 mt-complexs per cell and each one contained 340-1700 Mbp DNA. The time from pollination to cell fusion was 6~9 hours and to the first zygotic division was 20~24 hours . After the fertilization, mt-complex was gradually transformed to the single ring, to the crushed-shape and finally in the 2-celled embryo, to short fine strings or small rings and the DNA amount was about 3.4Mbp. In this review, the significance of the appearance of the peculiar giant mitochondria in the egg cell were discussed.

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Mitochondrial number and form change during autospore formation in Chlorococcum infusionum (Schrank) Meneghini (Chlorococcales, Chlorophyta)

Cited by 11 publications

References 4 publications

Mitochondrial Dynamics in Red Algae. 3. Filament Apices in Colaconemacaespitosum (Acrochaetiales) and Antithamnion cruciatum (Ceramiales)

Mitochondrial Dynamics in Red Algae. 3. Filament Apices in Colaconemacaespitosum (Acrochaetiales) and Antithamnion cruciatum (Ceramiales)

Dynamics of mitochondria in living cells: Shape changes, dislocations, fusion, and fission of mitochondria

Diversity of mitochondria and mitochondrial nuclei in the egg cell before and after the fertilization

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