The Unique Zoosporangial Release of the Unique Zoospores of Vaucheria

This is a unique zoospore produced by the filamentous algal genus Vaucheria. The Vaucheria filaments are multinucleate or coenocytic and so is the zoospore. No other alga produces this type of spore. A future video will demostrate the formation of the zoosporangium that produces this multinuclear zoospore (with each nucleus forming a pair of flagella). The nuclei line the periphery or surface of the zoospore and the flagella line the entire surface of the zoospore. As the zoospore reaches maturity in the sporangium, vesicles are released at the tip of the cell which degrades the cellulosic wall allowing the zoospore to escape from the sporangium. This occurs very quickly as seen from seconds:16-20. The zoospore begins giriating or spinning soon after the immediate emergence due to the rhythmic beating of the hundreds of flagella. The zoospore begins to slowly spin and emerge from the sporangium often taking over 4 minutes. The multiflagallated zoospore is released and rapidly swims away. The zoospore resembles an over inflated party balloon becoming deformed as it squeezes through the small sporangial opening. The first sequence demonstrates the mature stages of zoosporangial release, including a mature zoosporangium in the act of releasing it’s zoospore, to one that begins it’s emergence, and even a zoosporangium on the left that has aborted. All of this occurs at day-break in nature or when my culture chamber lights come on at 8:00am. The last sequence of this video is
Video Rating: 5 / 5

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Comments ( 6 )
  1. The Unique Zoosporangial Release of the Unique Zoospores of Vaucheria « Hourly Book
    September 7, 2012 at 11:55 pm

    […] Biology education Like this:LikeBe the first to like this. Categories: Uncategorized Comments (0) Trackbacks (0) Leave a comment Trackback […]

  2. krumbalu
    September 8, 2012 at 12:09 am

    by the way what is your equipment? brand and model of your microscope and the camera you used to register the movie??


  3. uaalgae
    September 8, 2012 at 12:48 am

    Thank you very much but is sad to have to speed this up so fast as it is fascinating to watch the zoospores slowly rotate and swim away. There will be more videos of the zoosporogenesis of Vaucheria soon on YouTube.

  4. krumbalu
    September 8, 2012 at 1:20 am


  5. uaalgae
    September 8, 2012 at 1:49 am

    Thank you, I still don’t have the entire zoospore formation in time-lapse yet but I am working on it.

  6. Pau Ren
    September 8, 2012 at 2:28 am

    Very intersting and well done!

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