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  • 1
    Electronic Resource
    Electronic Resource
    Neue Varietäten von Chlamydomonas mundana Gerloff (1963)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 10 (1963), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. Three new varieties of Ch. mundana Gerloff, clearly different from the type are described. In two of these, var. simulans and var. globulosa, the eyespot is reduced to a variable extent and absent from most individuals. The third, var. astigmata, completely lacks an eyespot. Presence or absence of the eyespot can serve to differentiate subspecific taxa but not species of Ch. mundana. The nomenclature and systematics of the 5 known varieties of this species are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1963.tb01690.x
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  • 2
    Electronic Resource
    Electronic Resource
    Teilungsverhalten der Chromatophoren in bezug auf die Mitose während des Lebenszyklus vonDiatoma hiemale var.mesodon, II (1978)
    Springer
    Plant systematics and evolution 129 (1978), S. 315-322 
    Details
    ISSN: 1615-6110
    Keywords: Diatoms ; Diatoma hiemale ; Cell division ; chromatophore division ; mitosis ; cell cycle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The studies of the cell cycle ofDiatoma hiemale var.mesodon have been continued on a population during the whole vegetative period (August–October 1976). The lapse of time between the maxima of the chromatophore division and the mitosis is 8 hours in the exponentional and stationary phase of growth of the population; during the decline and decay of the population it is shortening to 2–4 hours. The sequence of phases is maintained, but the stage of praemitotic stagnation is shortened to a minimum. During the stage of the chromatophore division a relationship was found between time lapse and chromatophore number per cell. The cell cycle (asexual life cycle) ofDiatoma hiemale var.mesodon has been schematically illustrated during optimal development and its different stages are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00982757
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  • 3
    Electronic Resource
    Electronic Resource
    ÜberHydrianum viride (Characiaceae, Chlorophyceae), seine fortpflanzung und taxonomie (1978)
    Springer
    Plant systematics and evolution 129 (1978), S. 209-219 
    Details
    ISSN: 1615-6110
    Keywords: Chlorophyceae ; Characiaceae ; Hydrianum ; Zoospore reproduction ; life cycle ; taxonomy ; epiphytism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The little known epiphytic algaHydrianum viride was studied and pictured. The morphology and the variability of the vegetative cells are described in detail and compared with the observations of other authors. For the first time typical biflagellate zoospores of the chlorophycean-type have been recognized and the course of the asexual reproduction is studied. The residual protoplasm, that is the proximal half of the zoosporangium protoplast, growth up to the original size, typical for the genusHydrianum. The life cycle, especially the settling down of the zoospores, is described.Hydrianum viride belongs to the characteristic inhabitants of peaty waters; it belongs together with the host alga,Microspora loefgrenii, to the dominants of algal association of peat-springs. At last the taxonomic position and the synonyma of this organism are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00990761
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  • 4
    Electronic Resource
    Electronic Resource
    Die neue KlasseChlamydophyceae, eine natürliche Gruppe der Grünalgen (Chlorophyta) (1981)
    Springer
    Plant systematics and evolution 137 (1981), S. 107-126 
    Details
    ISSN: 1615-6110
    Keywords: Chlorophyta ; Chlamydophyceae cl. n. ; Taxonomy ; morphology ; reproduction ; systematic conclusions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract On the basis of the present concept of theChlorophyta, a new class, theChlamydophyceae, is established and described. It includes allVolvocales with cell walls, theTetrasporales and thoseChlorococcales with zoospores of theChlamydomonas-type. The diagnostic features of theChlamydophyceae are as follows. Both, flagellates and zoospores have a cell wall with specific ultrastructure which lacks cellulose. The cell wall of the gametes is thrown off before or during fusion. Protoplast divisions are multiple (schizogonic); binary (schizotomic) fissions do not occur. Sporangia and gametangia are formed already on the monadoid level. In asexual resting stages the old cell wall is incorporated into the cyst wall. The polarized structure of theChlamydomonas-like flagellate is ± maintained in non-motile stages. Contractile vacuoles occur in freshwater species, and only sometimes disappear in adult and old non-motile cells; proper central vacuoles are lacking.—From the morphological point of viewChlamydophyceae can be derived from stages in the life cycle ofChlamydomonas. Relationships with theChlorophyceae s. str. and the other Green Algae are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983209
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  • 5
    Electronic Resource
    Electronic Resource
    Neue Chrysophyceen aus dem nordmährischen Quellengebiet (1978)
    Springer
    Plant systematics and evolution 129 (1978), S. 221-241 
    Details
    ISSN: 1615-6110
    Keywords: Chrysophyceae ; Chromulina ; Monochrysis ; Ochromonas ; Pseudokephyrion ; Chrysococcus ; Epipyxis ; Taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract New taxa ofChrysophyceae from small heleocrene and limnocrene springs are described and pictured. The delicate flagellates were observed and drawn in living stage immediately after collection. Some of them show peculiar morphology and striking structure of organelles. The following new taxa are described in this paper:Chromulina nasuta, Chromulina pavlikii, Chromulina taeniata, Chromulina oligochrysis, Chromulina pyrenoidosa, Monochrysis stigmatica, Ochromonas oligochrysis, Ochromonas taeniata, Pseudokephyrion hypermaculatum, Pseudokephyrion hyalinum var.tubiforme, Chrysococcus ellipsoideus, Epipyxis borealis var.monoplastida.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00990762
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  • 6
    Electronic Resource
    Electronic Resource
    Chlamydomonas chlorococcoides nova spec., eine neue Art mit gelapptem Chloroplast (Volvocales, Chlorophyta) (1981)
    Springer
    Plant systematics and evolution 138 (1981), S. 115-120 
    Details
    ISSN: 1615-6110
    Keywords: Volvocales ; Chlamydomonas ; Morphology ; reproduction ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Chlamydomonas chlorococcoides, a morphologically most interesting new species with a lobate chloroplast was isolated from soils of the island Lavsa (Adriatic Sea, Yugoslavia). Description, pictures and remarks on the reproduction are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984612
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  • 7
    Electronic Resource
    Electronic Resource
    Gloeomonas oderChlamydomonas? Elektronenmikroskopische Untersuchungen anGloeomonas simulans (1976)
    Springer
    Plant systematics and evolution 125 (1976), S. 109-121 
    Details
    ISSN: 1615-6110
    Keywords: Chlorophyceae ; Volvocales ; Gloeomonas ; Chlamydomonas ; Fine structure ; flagellar rootlet system ; cell wall ; nuclear inclusions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The fine structure ofGloeomonas simulans Fott (1957) was studied electron microscopically to ascertain whether it belongs to the genusChlamydomonas rather than toGloeomonas. Most cytoplasmic elements and the cell wall do not differ from otherChlamydomonadaceae but its flagellar rootlet system is unique: Each of the two flagella has an accessory basal body; its basis is accompanied by two inner and two outer bands which are connected distally (one inner and one outer band on each side) resp. proximally (the two outer bands); the latter form a long (up to 3–5 µm) connecting band between the two flagellar bases. The nucleus contains fibrillar bundels.—The unique flagellar rootlet system seems to provide a better basis for the generic classification ofGloeomonas than the position of the contractile vacuoles or the size of the apical papilla, and strongly suggests the exclusion ofG. simulans fromChlamydomonas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00986776
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  • 8
    Electronic Resource
    Electronic Resource
    Über die Bedeutung der Cytologie für die Algentaxonomie, dargestellt anTrebouxia (Chlorellales, Chlorophyceae) (1984)
    Springer
    Plant systematics and evolution 148 (1984), S. 135-147 
    Details
    ISSN: 1615-6110
    Keywords: Algae ; Chlorophyceae ; Chlorellales ; Trebouxia ; Pseudotrebouxia ; Cytology and taxonomy of algae ; nucleus ; chloroplast ; pyrenoid ; cell division ; autospores
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Considering that the majority of the algae are unicellular organisms or consist of cell colonies or small thalli, it is obvious that cytology has to play a key role in algal taxonomy. Unfortunately, this has often been neglected, even in more recent work, as can be seen in descriptions ofTrebouxia species. If no clear distinction is being made between uni- and multinuclear cells, faulty interpretations of vegetative of developing stages result. Thus, uninuclear cells are only those in which nuclear divisions occur just before reproduction, in which whereas nuclear division accompany the trophic growth of multinuclear cells. Further mistakes concern the description of the chloroplast structures and the separation between naked or starch enveloped pyrenoids. Also significant is the first cell division during asexual reproduction: Here, one has to distinguish between protoplast division (cytogony, eleutheroschisis) and cell division (cytotomy, desmoschisis). All the species ofTrebouxia undergo cytogony resulting in the formation of zoospores or autospores. The characteristics of all natural algal groups can be determined mainly by their cytology. Cytological misinterpretations thus often result in serious taxonomic errors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984574
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  • 9
    Electronic Resource
    Electronic Resource
    Der Rhizoplast vonTetraselmis cordiformis sichtbar auch im Lichtmikroskop (1980)
    Springer
    Protoplasma 103 (1980), S. 393-395 
    Details
    ISSN: 1615-6102
    Keywords: Light microscopal investigation ; Prasinophyceae ; Rhizoplast ; Tetraselmis cordiformis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The massive rhizoplast of the prasinophycean algaTetraselmis cordiformis, well known from the electron microscopy investigations, is shown on living cells by light microscopy using the phase-contrast. It appears as a dark girdle attached to the surface of the nuclear envelope.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01276964
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  • 10
    Electronic Resource
    Electronic Resource
    Eine neueCarteria-Art mit doppelten Organellen (1964)
    Springer
    Plant systematics and evolution 111 (1964), S. 366-371 
    Details
    ISSN: 1615-6110
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Zusammenfassung Es wird eine neueCarteria-Art beschrieben, deren Organellen, mit Ausnahme des Kernes und des Chromatophors, verdoppelt sind. Die Anordnung der verdoppelten Organellen läßt auf eine Zwillingszelle deuten, die dem Bau zweier verschmolzenerChlamydomonas-Zellen entspricht. Von einer Aufklärung des genetischen Ursprunges wird jedoch Abstand genommen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01372907
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