Auxospores of the diatom Thalassiosira sp.

Images made through a microscope. All subject types.

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Franz Neidl
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Auxospores of the diatom Thalassiosira sp.

Post by Franz Neidl »

This are Auxospores of the diatom Thalassiosira ( T. rotula?).

Wikipedia writes about Auxospores:
"Auxospores are involved in re-establishing the normal size in diatoms because successive mitotic cell divisions leads to a decrease in cell size. This occurs because each daughter cell produced by cell division inherits one of the two valves that make up the frustule (a silica cell wall), and then grows a smaller valve within it. Consequently, each division cycle decreases the average size of diatom cells in a population. When its size becomes too small, a dividing diatom cell produces an auxospore to expand its cell size back to that which is normal for vegetative cells".

2 pictures

Franz


Image


Image

Pau
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Post by Pau »

Excellent pictures and most interesting subjet. I did read about this curious cycle but never saw it photographed.
Last edited by Pau on Fri Dec 28, 2012 5:15 am, edited 1 time in total.
Pau

Litonotus
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Post by Litonotus »

great, looks like a necklace (:
my FB page

I'm looking for the the extemely rare V-IM magnification changer for the E800 scope. If you have seen a listing or have one for sale please let me know.

pwnell
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Post by pwnell »

Second one is quite special.

Jacek
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Post by Jacek »

nice pictures and interesting object

Charles Krebs
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Post by Charles Krebs »

Franz,

Beautiful and interesting.

I always seem to learn something new from your posts!

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