Results 81 to 90 of about 235 (121)
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Microtubule organization during zoosporogenesis inAllomyces macrogynus
Protoplasma, 1997The microtubule cytoskeleton and cytoplasmic organization ofAllomyces macrogynus during zoosporogenesis was studied using light and electron microscopy. Indirect immunofluorescence methods revealed that the microtubule cytoskeleton progressed through three distinct stages of cytoplasmic distribution during zoospore development.
D. S. Lowry, R. W. Roberson
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An ultrastructural study of zoosporogenesis inPythium proliferum de Bary
Protoplasma, 1976Zoosporogenesis in the oomycete,Pythium proliferum de Bary initially involves a condensation of cytoplasm at certain hyphal tips and the subsequent enlargement of these hyphal tips to form sporangia. Deposition of a septum at the base of the sporangium and initiation of an apical papilla are followed by cleavage of the sporangial cytoplasm.
Carol Z. Lunney, Charles E. Bland
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Light is a crucial signal for zoosporogenesis and gametogenesis in some green microalgae
European Journal of Phycology, 2013Patterns 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.
Pavel Pribyl
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Changes in intracellular pH during zoosporogenesis inPhytophthora cinnamomi
Protoplasma, 1996Changes in intracellular pH (pHi) have been examined during zoosporogenesis inPhytophthora cinnamomi in order to elucidate the molecular mechanisms that bring about initiation of the orderly cleavage of the sporangium. By microinjecting a dextranconjugated pH-sensitive fluorescent indicator, 2′,7′-bis(2-carboxyethyl)-5(6)-carboxyfluorescein (BCECF ...
E. Suzaki +3 more
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European Journal of Protistology, 1989
The fine structure of mitosis and cytokinesis leading to formation of zoospores in the unicellular tribophycean alga Botrydiopsis alpina Vischer has been studied by ultra-rapid cryofixation, freeze substitution, and electron microscopy. Preceding zoosporogenesis, the cell usually enlarges considerably and becomes multinucleate.
Gijsbert M Lokhorst
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The fine structure of mitosis and cytokinesis leading to formation of zoospores in the unicellular tribophycean alga Botrydiopsis alpina Vischer has been studied by ultra-rapid cryofixation, freeze substitution, and electron microscopy. Preceding zoosporogenesis, the cell usually enlarges considerably and becomes multinucleate.
Gijsbert M Lokhorst
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The Morphology of Lagenidium Callinectes II. Zoosporogenesis
Mycologia, 1974Zoosporogenesis in the holocarpic marine phycomycete Lagenidium callinectes is initiated when actively growing mycelium is washed free of medium and placed in sea water.
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Pearl millet downy mildew (Sclerospora graminicola): Zoosporogenesis
Protoplasma, 1984Cleavage of the zoosporangial cytoplasm ofSclerospora graminicola, the causal agent of pearl millet downy mildew, is by means of the fusion of cleavage vesicles and vesicles containing the extruded axoneme with the cell membrane. This type of zoosporogenesis linksS.
L. Lange, L. W. Olson, K. M. Safeeulla
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Zoosporogenesis in Pseudoperonospora cubensis, the causal agent of cucurbit downy mildew
Nordic Journal of Botany, 1989During sporulation of Pseudoperonospora cubensis on cucumber leaves ( Cucumis saliva ) zoosporangia are formed on the dichotomously branched sporangiophore. The mature zoosporangium has a preformed discharge papilla and the cytoplasm is uncleaved.
Lene Lange, Ulla Edén, Lauritz W. Olson
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Archiv Für Protistenkunde, 1994
Summary The “amoeboflagellate” Reticulamoeba gemmipara n. gen., n. sp. was isolated from samples which were collected in the littoral zone of the Greek island Thera (Santorin). It could be cultivated with the pennate diatom Amphiprora sp. as food organism. On a “lawn” of the diatoms, the amoeboid stages create clusters.
Karl G Grell
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Summary The “amoeboflagellate” Reticulamoeba gemmipara n. gen., n. sp. was isolated from samples which were collected in the littoral zone of the Greek island Thera (Santorin). It could be cultivated with the pennate diatom Amphiprora sp. as food organism. On a “lawn” of the diatoms, the amoeboid stages create clusters.
Karl G Grell
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Protoplasma, 1986
Cytoplasmic cleavage in the gametangia and zoosporangia ofA. macrogynus was studied using monensin, an ionophore known to disrupt several endomembrane functions in plant and animal cells. Monensin interfered with normal gamete and zoospore formation in a dose dependent manner such that at a 20 μM concentration very abnormal cells were released from the
T. Sewall +3 more
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Cytoplasmic cleavage in the gametangia and zoosporangia ofA. macrogynus was studied using monensin, an ionophore known to disrupt several endomembrane functions in plant and animal cells. Monensin interfered with normal gamete and zoospore formation in a dose dependent manner such that at a 20 μM concentration very abnormal cells were released from the
T. Sewall +3 more
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