A Deviating Pattern of Cell Division in the Green Alga Microthamnion: Ultrastructure of Vegetative Cell Division and Zoosporogenesis

Bakker, Margreet

doi:10.1016/s0003-9365(11)80105-3

Cited by 4 publications

(1 citation statement)

References 34 publications

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“…Formation of sporangia in Microthamnion sp. was induced after 16 h darkness (Bakker, 1995) and production of gametes in Chlorococcum echinozygotum also occurred in darkness (O'Kelley, 1983). In contrast, in Chlamydomonas monoica, experimentally applied darkness inhibited gamete mating during the later phase of the cell cycle (van den Ende, 1995).…”

Section: Discussionmentioning

confidence: 96%

Light is a crucial signal for zoosporogenesis and gametogenesis in some green microalgae

Přibyl

2013

European Journal of Phycology

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Patterns of reproduction were investigated in some microalgal species of Chlorophyceae (Botryosphaerella sudetica, Neochloris aquatica, Neochloris vigensis, Bracteacoccus minor). Under continuous light, the microalgae reproduced asexually producing autospores. However, appropriate manipulation of external conditions led to a change in the reproduction pattern towards production of zoospores or gametes. Production of zoospores and gametes was inhibited by light; motile cells emerged when microalgae were cultivated in darkness. The period of dark treatment necessary for zoosporogenesis or gametogenesis differed substantially among species that were tested. Sexual reproduction was observed in Neochloris vigensis and Bracteacoccus minor, whose generative life cycle had not been previously reported. The morphology of motile cells, the mode of sexual reproduction, and the efficiency of both the production of motile stages and mating events, were investigated. In order to gain detailed insights into patterns of reproduction, Botryosphaerella sudetica was selected for investigation under different light treatments. Nonactinic red light applied in the early phase of dark cultivation (up to 2 h) suppressed both zoosporogenesis and gametogenesis. However, after a 3-h dark pre-treatment, red light treatment had no effect on zoosporogenesis or gametogenesis. In contrast, nonactinic blue light did not block zoosporogenesis or gametogenesis, regardless of the time of treatment. The possible role of a redlight photoreceptor in zoosporogenesis and gametogenesis is discussed.

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Section: Discussionmentioning

confidence: 96%

Light is a crucial signal for zoosporogenesis and gametogenesis in some green microalgae

Přibyl

2013

European Journal of Phycology

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Systematics and Evolution of the Algae: Phylogenetic Relationships of Taxa Within the Different Groups of Algae

Preisig

1999

Progress in Botany

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The flagellar apparatus ultrastructure in Leptosira erumpens (Deason & Bold) lukesová and its contribution to the understanding of phylogenese relationships within the microthamniales (chlorophyta)

Bakker

Jong

Lokhorst

1997

Archiv für Protistenkunde

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A Deviating Pattern of Cell Division in the Green Alga Microthamnion: Ultrastructure of Vegetative Cell Division and Zoosporogenesis

Cited by 4 publications

References 34 publications

Light is a crucial signal for zoosporogenesis and gametogenesis in some green microalgae

Light is a crucial signal for zoosporogenesis and gametogenesis in some green microalgae

Systematics and Evolution of the Algae: Phylogenetic Relationships of Taxa Within the Different Groups of Algae

The flagellar apparatus ultrastructure in Leptosira erumpens (Deason & Bold) lukesová and its contribution to the understanding of phylogenese relationships within the microthamniales (chlorophyta)

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