Pandorina

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Pandorina
Colonies of Pandorina morum from Smith (1920, p. 201)[1]
Scientific classification Edit this classification
(unranked): Viridiplantae
Division: Chlorophyta
Class: Chlorophyceae
Order: Chlamydomonadales
Family: Volvocaceae
Genus: Pandorina
Bory de Saint-Vincent
, 1824
Species

Pandorina is a genus of

flagella with two contractile vacuoles at their base, an eyespot, and a large cup-shaped chloroplast with at least one pyrenoid
.

Pandorina sp.

The colonies co-ordinate their flagellar movement to create a rolling, swimming motion. Pandorina shows the beginnings of the colony polarity and differentiation seen in

paraphyletic with respect to Volvulina.[2][3][4]

Asexual reproduction is by simultaneous division of all cells of the colony to form autocolonies that are liberated by a gelatinization of the colonial envelope. Sexual reproduction occurs by division of each cell of the colony into 16-32 zoogametes. Zoogametes show indications of heterogamy, a slight difference in the size and motility of the pairs that fuse to form the smooth walled zygote.[1]

References

  1. ^ a b Smith, GM. Phytoplankton of Inland Lakes of Wisconsin, Part I, Wisconsin Geological and Natural History Survey, Madison, WI. (1920).
  2. PMID 24589311
    .
  3. PMID 12099791
    .
  4. S2CID 86211466
    .

External links
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