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  • 1
    Electronic Resource
    Electronic Resource
    Specificity of Glycerol for Dark Growth of Prymnesium parvum (1967)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 14 (1967), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. Out of 64 nutrients tested, none replaced glycerol for growth in the dark of Prymnesium parvum. Some metabolites enahanced growth in the light, and in the presence of glycerol also in the clark. Good growth with glycerol could be obtained in the absence of CO2. Survival of cultures in the dark in media without glycerol was prolonged by various nutrients. Thioglycerol in glycerol-containing media inhibited growth in light and darkness. Apparently Prymnesium parvum has a specific glycerol requirement for dark growth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1967.tb01445.x
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  • 2
    Electronic Resource
    Electronic Resource
    Growth of Prymnesium parvum in the Dark; Note on Ichthyotoxin Formation (1965)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 12 (1965), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. For the first time the chrysomonad Prymnesium parvum was grown in the dark; glycerol was necessary and could not be replaced by any other metabolite tested. The dark-grown cultures, as compared to light-grown ones, atteined an almost 2-fold optical density per cell number, caused possibly by a partial pigment-bleaching in the light or a higher pigment formation in the dark. Ichthyotoxic activity of Prymnesium cultures was greater for the dark-grown cultures in which no photoinactivation of this toxin occurs. Therefore light is not required for synthesis of this toxin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1965.tb01845.x
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  • 3
    Electronic Resource
    Electronic Resource
    Cholera toxin and thyrotropine can replace natural inducers required for the metamorphosis of larvae and buds of the scyphozoanCassiopea andromeda (1985)
    Springer
    Development genes and evolution 194 (1985), S. 487-490 
    Details
    ISSN: 1432-041X
    Keywords: Cnidaria ; Cassiopea ; Metamorphosis ; Cholera toxin ; Thyrotropine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The scyphozoan medusaCassiopea andromeda forms free swimming planulae and buds that metamorphose into tentacle bearing sedentary polyps. About 30% of the planulae and 7% of the buds undergo such metamorphosis within 30 days in sterile natural seawater from the Red Sea. In sterile artificial sea water devoid of any organic substances, normal metamorphosis does not take place. This indicates that both the planulae and the buds require organic morphogenetic inducers present in the sea to settle and metamorphose. The addition of cholera toxin or thyrotropin to preparations of sterile artificial sea water, induced normal metamorphosis. These inducers enhanced the rate of metamorphosis and up to 100% of the planulae and buds formed polyps within 2–18 days. We conclude that our preparations of cholera toxin and thyrotropin mimic the action of natural inducers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00868150
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  • 4
    Electronic Resource
    Electronic Resource
    Ultrastructure of nematocytes and one-celled tentacles of the freshwater coelenterate, Calpasoma dactyloptera (1975)
    Springer
    Cell & tissue research 159 (1975), S. 445-457 
    Details
    ISSN: 1432-0878
    Keywords: Tentacles ; Coelenterata ; Cytology ; Microtubules, Cilia ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Calpasoma dactyloptera, a tentacled form of minute, freshwater coelenterate, has been investigated by light and electron microscopy and time-lapse cinematography. Each tentacle consists of a protrusion from a single ectodermal epithelial cell termed a tentaculocyte. hin tentaculocyte vesicles which represent invaginations of the plasma membrane. A cnidocil protrudes into the external medium. The bottom of each nematocyte is elongated as a stalk which extends to the tentacle base, coursing through tubular membrane lined channels within the tentaculocyte. A network of fibers and microtubules, originating in the cnidocil, extends to the base of the nematocyte stalk.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00221702
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  • 5
    Electronic Resource
    Electronic Resource
    Species-specific ability ofChlorella strains (Chlorophyceae) to form stable symbioses withHydra viridis (1988)
    Springer
    Plant systematics and evolution 160 (1988), S. 241-246 
    Details
    ISSN: 1615-6110
    Keywords: Algae ; Chlorophyceae ; Chlorella ; Hydra viridis ; Biochemical taxonomy ; symbiosis ; acid tolerance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract 46 strains ofChlorella, identified by physiological and biochemical characters, were examined for their ability to form stable symbioses with aposymbioticHydra viridis. It was found to be a species-specific characteristic. Among the 15 taxa studied, onlyC. saccharophila var.ellipsoidea, C. saccharophila var.saccharophila, C. fusca var.vacuolata, C. kessleri, C. luteoviridis, andC. protothecoides formed stable symbioses withHydra viridis. Among the 11 known physiological and biochemical characters of theseChlorella species, only acid tolerance seems to be correlated with symbiosis: All symbiotic species are capable of growing at or below pH 4.0.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00936050
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  • 6
    Electronic Resource
    Electronic Resource
    The hidden flora of a lake (1968)
    Springer
    Hydrobiologia 31 (1968), S. 186-192 
    Details
    ISSN: 1573-5117
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Vingt-sept échantillons d'eau prélevés dans le Lac de Tibériade, Israel, ont été enrichis sélectivement par des milieux salins inorganiques afin de stimuler le développement d'algues halophiles rares ou inconnues dans le lac. Notre attention a été particulièrement attirée par la présence du Chrysophyte flagélléPrymnesium parvum, qui provoque des pullulations toxiques dans L'eau. Nous avons pu observer un changement radical dans la composition floristique des échantillons enrichis. Parmi les 31 espèces qui se sont développées dans nos cultures, 11 espèces sont inconnues dans le lac; 15 espèces appartiennent aux Cyanophyceae, 8 aux Diatomées et 7 aux Chlorophyceae. Nous avons trouvéPrymnesium parvum dans 6 échantillons sur 27. Nous pouvons conclure, qu'en cas d'accroissement du taux de la salinité dans le lac, les algues halophiles, actuellement rares ou dormantes, remplaceront la flore présente. Les possibles pullulations toxiques dePrymnesium parvum dans les eaux du Lac constituent donc un danger permanent.
    Notes: Summary Twenty-seven water samples taken from the Sea of Galilee, Israel, were enriched selectively with an inorganic salt medium to further the appearance of halophilic algae, rare or unknown from the lake. The Chrysophycean flagellatePrymnesium parvum, known to cause toxic blooms, has been especially looked for. A radical change in the algal composition of the enriched samples could be observed. Out of 31 species that proliferated in the so established cultures, 11 were new to the lake. Fifteen species belonged to the Cyanophyceae, 8 to the Diatomeae, and 7 species belonged to the Chlorophyceae. Prymnesium parvum could be found in 6 out of the 27 samples. It is concluded that in case of a sufficient rise in the lake's salinity, halophilic algae that are now rare or dormant in the lake, will replace the present algal flora. The presence in the lake ofPrymnesium parvum forms a potential danger of toxic blooms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00731550
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  • 7
    Electronic Resource
    Electronic Resource
    The hidden flora of a lake (1968)
    Springer
    Hydrobiologia 31 (1968), S. 186-192 
    Details
    ISSN: 1573-5117
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Vingt-sept échantillons d'eau prélevés dans le Lac de Tibériade, Israel, ont été enrichis sélectivement par des milieux salins inorganiques afin de stimuler le développement d'algues halophiles rares ou inconnues dans le lac. Notre attention a été particulièrement attirée par la présence du Chrysophyte flagéllé Prymnesium parvum, qui provoque des pullulations toxiques dans L'eau. Nous avons pu observer un changement radical dans la composition floristique des échantillons enrichis. Parmi les 31 espèces qui se sont développées dans nos cultures, 11 espèces sont inconnues dans le lac; 15 espèces appartiennent aux Cyanophyceae, 8 aux Diatomées et 7 aux Chlorophyceae. Nous avons trouvé Prymnesium parvum dans 6 échantillons sur 27. Nous pouvons conclure, qu'en cas d'accroissement du taux de la salinité dans le lac, les algues halophiles, actuellement rares ou dormantes, remplaceront la flore présente. Les possibles pullulations toxiques de Prymnesium parvum dans les eaux du Lac constituent donc un danger permanent.
    Notes: Summary Twenty-seven water samples taken from the Sea of Galilee, Israel, were enriched selectively with an inorganic salt medium to further the appearance of halophilic algae, rare or unknown from the lake. The Chrysophycean flagellate Prymnesium parvum, known to cause toxic blooms, has been especially looked for. A radical change in the algal composition of the enriched samples could be observed. Out of 31 species that proliferated in the so established cultures, 11 were new to the lake. Fifteen species belonged to the Cyanophyceae, 8 to the Diatomeae, and 7 species belonged to the Chlorophyceae. Prymnesium parvum could be found in 6 out of the 27 samples. It is concluded that in case of a sufficient rise in the lake's salinity, halophilic algae that are now rare or dormant in the lake, will replace the present algal flora. The presence in the lake of Prymnesium parvum forms a potential danger of toxic blooms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00206051
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  • 8
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    Unknown
    Ultrastructure of nematocytes and one-celled tentacles of the freshwater coelenterate, Calpasoma dactyloptera (1975)
    Springer
    Details
    Publication Date: 1975-06-01
    Print ISSN: 0302-766X
    Electronic ISSN: 1432-0878
    Topics: Biology , Medicine
    Published by Springer
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  • 9
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    Unknown
    The hidden flora of a lake (1968)
    Springer
    Details
    Publication Date: 1968-04-01
    Print ISSN: 0018-8158
    Electronic ISSN: 1573-5117
    Topics: Biology
    Published by Springer
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  • 10
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    Cholera toxin and thyrotropine can replace natural inducers required for the metamorphosis of larvae and buds of the scyphozoanCassiopea andromeda (1985)
    Springer
    Details
    Publication Date: 1985-01-01
    Print ISSN: 0949-944X
    Electronic ISSN: 1432-041X
    Topics: Biology
    Published by Springer
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