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Scientific article
English

Cell morphology and localization of Fe and Mn in field-collected algae Pachycladella umbrina and P. zatoriensis (Chlorococcales, Chlorophyceae)

Published inAlgological Studies, vol. 68, p. 51-63
Publication date1993
Abstract

TEM observations of field-collected cells of Pachycladella umbrina from Taiwan and P. zatoriensis from France, confirm earlier LM records of a pyrenoid and bifurcated appendages. The pyrenoid is scattered with spoke-like channels focusing, when present, to a central cavity. The cell wall is surrounded by a layer of fluffy hair-like material and four appendages. These appendages are hollow tubes, closed at their bifurcated or sometimes blunt apex. The appendages of P. umbrina are covered with many electron-dense conical and hollow warts. EELS microanalysis of P. umbrina and P. zatoriensis reveals that the appendages contain Fe and Fe+ Mn respectively. Because of preservation problems, other features were not investigated. Field-collected P. umbrina differs from a culture of the same species (REYMOND & HEGEWALD 1990) by the presence of a pyrenoid, warts and iron. The taxonomy of Pachycladella and other genera of the family Treubariaceae is still unclear.

Keywords
  • Green alga
  • Chlorophyceae
  • Chlorococcales
  • Treubariaceae
  • Pachycladella
  • Taxonomy
  • Ultrastructure
  • Pyrenoid
  • Appendages
  • EELS
  • Microanalysis
  • Iron
  • Manganese
Citation (ISO format)
REYMOND, Olivier Luc, BIRCHEM, Regina, BOUTINARD ROUELLE-ROSSIER, Viviane. Cell morphology and localization of Fe and Mn in field-collected algae <i>Pachycladella umbrina</i> and <i>P. zatoriensis</i> (Chlorococcales, Chlorophyceae). In: Algological Studies, 1993, vol. 68, p. 51–63.
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Article (Published version)
accessLevelRestricted
Identifiers
  • PID : unige:125047
ISSN of the journal1864-1318
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