Spirogyra is a filamentous algae that may become so abundant during the summer that it forms the so-called 'pond scum', the familiar thick green masses in a pond. But under the microscope these organisms are beautiful. Like their relatives the desmids they are conjugating green algae. You can often see them conjugating. 2 strands of Spirogyra will make connections by small tubes and exchange genetic material. Note the chloroplasts in a helix and the nucleus in the center of the cell.

 
 

All comments to the author Wim van Egmond are welcomed.

Visit Wims home page for links to his many web pages on microscopy

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