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Cytology and ultrastructure of eustigmatophyceae

By Lilia Maria Antunes dos Santos


Tvelve-species of the alqa class Eustigmatophyceae were\ud studied by means of light and electron microscopy, with\ud particular reference to structural aspects of the vegetative\ud cells and the flagellar apparatus of the zoospores.\ud \ud The Vegetative cells are shown to have microfibrils\ud (probably cellulose)' in the cell wall (Vischeria stellata),\ud lamellate vesicles in the cytoplasm of all the species\ud observed and a clear connection between the cfiloroplast\ud endoplasmic reticulum and the nuclear envelope only in\ud representatives of the Monodopsidaceae. Microfibrils\ud (probably cellulose) were also found in the cell wall of the\ud tribophycean species Ophiocytium malus.\ud \ud The most significant results on uni- and biflagellate\ud zoospores include the observation of a Golgi body for the\ud first time in a eustigmatophycean zoospore (Vischeria\ud helvetica) and the first reconstruction of the system of\ud flagellar roots in the Eustigmatophyceae (V. stellata). This\ud consists of a rhizoplast and four microtubular roots: roots\ud R1 (3 MTs) and R2 (2 MTs) originate-at basal body B1 and run\ud anteriorly around the flagellar swelling; root R3 (5 MTs)\ud arises between the basal bodies and runs to the posterior end of the cell; root R4 (2 MTs) originates at basal body B2 and curves around the eyespot.\ud \ud For comparison, zoospores of the tribophycean species\ud Heterococcus marietanii and H. protonematoldes were also studied. A system of flagellar roots consisting of a small rhizoplast and three microtubular roots, two directed anteriorly and one posteriorly was confirmed. A double helix was shown to be typical of the transition region of the flagella in-this genus.\ud \ud The few observations on settling cells shoved the\ud withdrawal of the complete flagellar apparatus including the\ud swelling-and the possibility of reformation of the pyrenold\ud in Vischeria from material stored in the spiral vesicles\ud during the motile stage.\ud \ud In preliminary observations on mitosis and cytokinesis\ud it was found that, at early stages, basal bodies appear near\ud the nuclear surface and the chloroplast and the pyrenoid\ud divide. Cytokinesis seems to occur by a cleavage furrow.\ud \ud My reconstruction of the flagellar root system in\ud Eustigmatophyceae shows sufficient similarities with the\ud flagellar, roots of other heterokont algal and fungal classes to justify its, inclusion with them in a single division,the Heterokontophyta. On the basis of this observation and the main ultrastructural features known for these classes,a phylogeny is, constructed for the whole group and the probable characteristics of the, common ancestor are proposed

Publisher: Faculty of Biological Sciences (Leeds)
Year: 1990
OAI identifier:

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  1. 1982b. Ultraestructura y pigmentos de a1gunas Chlorophyceae y Eustigmatophyceae planctonicas de morfologia similar.
  2. (1978). A Blochemical Phylogeny of the Protists.
  3. (1985). A comparison of the flagellar -apparatus in Phytophthora, Saproleqn1a, 'Thraustochytrium and-Rhizidlomyces.
  4. (1971). A nev algal class - the Eustigmatophyceae. doi
  5. (1988). A, flavin-like autofluorescent substance in the posterior, flagellum of golden and brovn algae. doi
  6. (1989). Absolute orientation apparatus of HIbberdla magna comb. nov. doi
  7. (1980). Algal classes: delimitation, ' Interrelationships and phylogeny. In: Taxonomy of Algae:
  8. (1983). Algal photosen5ory apparatus probably represent parallel evolutions. doi
  9. (1981). Algal walls -composition and - biosynthesis. In: doi
  10. (1974). Cell vall'and intercellular polysacchar ides.
  11. (1988). Characterization of the pyrenoid isolated from unicellular green alga Chlamydomonas reinhardtil: 84 particulate form of RuBisCO protein. doi
  12. (1966). Chemo-organotrophic growth of xa'nthaphycean algae. doi
  13. (1989). Corethron and Mallomonas -some striking morphological similarities. In: The Chromophyte Algae, Problems and Perspectives (Ed-. ' by
  14. (1969). Cytological studies on the coccold Xanthophyceae.
  15. (1978). Division Eustigmatophyta. In:
  16. (1969). Effect of gibberellins, kinetin and other factors on the qrowth of unicellular marine algae In culture. doi
  17. (1932). Einige neue Erdalgen.
  18. (1982). Estudio comparativo de la coiaposicion de piqmentos en varias cepas de 85 -',,
  19. (1982). Eustigmatophyceae: introduction and bibliography. In: Selected Papers In
  20. (1979). Factores que afectan al crecimiento en cultivo del alga planctonica marina Nannochloris sp..
  21. (1984). Flagellar apparatus absolute orientations and the phylogeny of the green algae. doi
  22. (1984). Flagellar apparatus ultrastructure in relation to green algal classification. In: Systematics of the green algae doi
  23. (1988). Flagellar transformation in the heterokont --; Epipyxis' pulchra -(Chrysophyceae)': " Airect observations using image enhanced light microscopy. doi
  24. (1985). flagellar., apparatus of the golden alga., Synura uvella: , four absolute orientations. doi
  25. (1974). Flaqellar structure in algae: a revievi vithý new observations particularly on the Chrysophyceae,,, Phaeophyceae (Fucophyceae), Euglenophyceae and Reckertia. doi
  26. (1987). Functional organization of chlorophyll a and carotenoids doi
  27. (1980). Growth, of a coccoid nanoplankter (Eustigmatophyceae) from the chesapeake bay as Influenced by light temperature, salinity and nitrogen -source in --, factorial combination. doi
  28. (1945). Heterokonten aus Alpinen Boden, Speziell dem Schweizerischen National Park.
  29. (1974). Hov many are the kingdoms of organisms? doi
  30. (1986). Identification of the alga known as "marine Chlorella" as a member of the Eustigmatophyceae.
  31. In: Synopsis and Class1f Icatlon of Living Organisms (Ed.
  32. INOUYEF 1.1989. Flaqellar autofluorescence in forty fourl chlorophyll c-containinq algae.
  33. (1978). Isolation and -partial characterization of pyrenoids from the brovn algae P11ayella littoralls (L.
  34. (1985). Le complexe nucleoplastidial chez les Chromophytesi. structure, fonction et interet dans une perspective phylogenetique.
  35. (1980). Light antennas, -in phototactic algae.
  36. (1983). Light-harvesting processes In algae. doi
  37. (1986). Liqht-harvesting pigment-protein complexes of algae. In: Photosynthesis ZZI. Photosynthetic Membranes and Light Harvesting Systems (Ed. by L.
  38. (1982). List of strains.
  39. (1978). Molecular, enzymatic and' ultrastructure characterization' of the pyrenoid of'the 'scaly green monad'Hicromonas squamata. doi
  40. (1982). Nannochloropsis gaditana sp. nov., una nueva Eustiqmatophyceae marina.
  41. (1958). Note systematique sur que1ques a1gues microscopiques des cuvettes supra-littorales de la region de Dinard.
  42. (1981). Notes' on taxonomy and nomenclature of the algal . -classes Eustigmatophyceae and Tribophyceae (synonym XanthophyceaeY. doi
  43. (1974). Observations on the cytology and ultrastructure of Chlorobotrys regularls (West) Bohlin vith special reference to its position in the Eustigmatophyceae. doi
  44. (1965). Observations on the fine structure of the male gamete of the marine centric diatom Lithodesmium undulatum. doi
  45. (1986). On the groundlessness of the separation DOGADINA;
  46. (1989). Oomycete fungi: their phylogeny and relationship - to chromophyte algae. In: The Chromophyte Algae,, - Problems and Perspectives (Ed.
  47. (1979). Pavlova and the taxonomy of flagellates especially the chrysomonads. Ph D thesis,
  48. (1982). Photorecepteurs et phototaxie des, f lagelles et des stades unicellulaires d1organismes Inferieurs.
  49. (1987). Photosynthetic , light-harvesting function of violaxanthin - in '- Nannochloropsis,,: doi
  50. (1975). Pigment and- cytological evidence for reclassification of Nannoclorls oculata and Monallantus sal1na in the Eustigmatophyceae. doi
  51. (1965). Polysaccharides*synthesised by Monodus subterraneus. doi
  52. (1973). Pseudocharaciopsis texensis gen. et sp. nov., a nev member of the Eustigmatophyceae. doi
  53. (1981). Pyrenoid protein from the brovn alga Pilaye2la littoralls.
  54. (1972). Pyrenoids of Vaucheria woroninlana Heering. doi
  55. (1957). Recherches sur les Chrysophycees.
  56. (1989). Regulation of fatty acid composition by irradiance level in the eustigmatophyte Nannochloronsis sp. doi
  57. (1958). Reouirement for thiamine amonq some marine and supra-littoral protista.
  58. (1979). Reviev of the taxonomic history and nomenclature of the yellow-green algae. doi
  59. Seriesp Sprinqer-Verlag,
  60. (1989). Some affinities of the Raphidophyceae with other, chromophyte -algae. In: The Chromophyte Algae, Problems and- Perspectives (Ed.
  61. (1955). Some new supra-littoral protista. doi
  62. (1972). Structure & function In the Euqlenoid eyespot apparatus: the fine structure and response to environmental changes. doi
  63. (1957). Studies on the grovth of Xanthophyceae in pure-culture. I. The-mineral nutrition of Monodus subterraneus Petersen. doi
  64. (1978). Survey of swimming pool .. algae of the Phoenix, doi
  65. (1989). Taxonomy, ultrastructure.. The- Synurophyc relationship to other golden algae.
  66. (1969). The absorption of chlorophyll-b in vivo. doi
  67. (1966). The carbon nutrition of some algae: the inability to utilize glycollic- acid for growth. doi
  68. (1970). The carotenoid pattern and the occurrence of the light Induced xanthophyll--cycle in various classes of algae.
  69. (1981). The chloroplast endoplasmic reticulum: structure, function and evolutionary significance. doi
  70. (1969). The chloroplast pigments of some green and yellow-green algae. doi
  71. (1975). The chloroplast pigments, of the algal classes Eustigmatophyceae doi
  72. (1954). The ecology of phytoplankton, I blooms in Moriches Bay and- Great South Bay, doi
  73. (1973). The fine structure of algal cells. doi
  74. (1980). The fine structure of Pavlova pinguis Green and a preliminary survey of the order Pavlovales (Prymnesiophyceae). doi
  75. (1989). The flaqellar base ultrastructure and phyloqeny of chromophytes. In: The Chromophyte Algae, 88 Problems and Perspectlves (Ed. by ,
  76. (1984). The functional and phylogenetic signi'f icance of dinoflagellate eyespots.
  77. (1983). The genus Vacuolaria (Raphidophyceae).
  78. (1986). The kingdom Chromista: origin and systematics.
  79. (1989). The origins of the diatom and its life cycle. In: -The Chromophyte Algae, Problems and Perspectives (Ed. ý by
  80. (1981). The phylogenetic and taxonomic 'implications"' of flagellar rootlet morphology "among zoosporic fungi. doi
  81. (1979). The phytoflagellates: fine structure and phylogeny. In: Biochemistry 'and Physiology of Protozoa,, Vol. ý - 1,, 2nd edn'
  82. (1979). The structure and ý phylogenetic significance of the flagellar transition region in the chlorophyll, c--containing algae. doi
  83. (1982). The taxonomy of Prymnesium (Prymnesiophyceae) Including'a description of a new cosmopolitan species, P. patellIfera sp. nov. 1 and- further -observations on P. doi
  84. (1985). The ultrastructure of Hyphochytri um, catenol des.
  85. (1975). The wall of. growing plant cells.
  86. (1974). Theýphylogeny of eukaryotic algae.
  87. (1987). Total lipid -production -of the -, green alga Nannochloropsis sp. QII under different nitrogen regimes. doi
  88. (1988). Transformation of the flaqella and associated flaqellar components during cell division in the coccolithophorid Pleurochrysis carterae. doi
  89. (1914). Uber Flagellaten und Algen. doi
  90. (1987). Ultrastructure of the Lagena-radicicola zoospore, including a comparison with the'. primary and secondary Saprolegnia zoospores. doi
  91. (1989). Ultrastructure', pigments and taxonomy of Botryochloropsis simills gen. doi
  92. (1986). Ultrastrutura-iý divis'ao'celular das algas Chromophyta. Estudo monograf lco';, 'FCTUC, Universidade de Coimbra.
  93. (1983). Variaciones cuantitativas de, los pigmentos de NannochloropsIs gad1tana Lubian,,
  94. (1970). Variations du comportement physiologique de l1alque Monallantus salina (Xanthophycee) en culture. doi
  95. (1968). Vitamin B12 and marine ecology. IV The kinetics- of uptake, growth and inhibition in Monochrysis lutherl. doi
  96. (1980). Xanthophytes. In: Phytoflagellates,, Developments In
  97. (1980). ý, Chloromonads. In: Phytof lagellates, Developments In
  98. (1972). Yellow-green algae .I with chlorophyllide c. doi

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