Desmid - Closterium

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hkv
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Desmid - Closterium

#1 Post by hkv » Tue Jan 23, 2018 10:05 pm

Sharing this Desmid - Closterium. Help on species ID appreciated. 60X objective. DIC. Stack of 30 exposures.

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Desmid - Closterium by Håkan Kvarnström, on Flickr

JimT
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Re: Desmid - Closterium

#2 Post by JimT » Tue Jan 23, 2018 10:58 pm

Beautiful image.

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vasselle
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Re: Desmid - Closterium

#3 Post by vasselle » Wed Jan 24, 2018 5:23 pm

Bonjour
Superbe image
Cordialement seb
Microscope Leitz Laborlux k
Boitier EOS 1200D + EOS 1100D

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KurtM
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Re: Desmid - Closterium

#4 Post by KurtM » Thu Jan 25, 2018 1:52 am

Beautiful image! 8-)

Check here: http://www.digicodes.info/Closterium.html
Cheers,
Kurt Maurer
League City, Texas
email: ngc704(at)aol(dot)com
https://www.flickr.com/photos/67904872@ ... 912223623/

Francisco
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Re: Desmid - Closterium

#5 Post by Francisco » Thu Jan 25, 2018 3:14 pm

Very nice

charlie g
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Re: Desmid - Closterium

#6 Post by charlie g » Thu Jan 25, 2018 6:12 pm

What a delicate crystalline crescent you share with us, thank you hkv..this evokes our crescent moon, complete with some 'green cheese'. Regards to an ID...I'm 'chiken' to advise you..but I will peek at my vintage library texts. Was this image capture from a fresh collected specimen? Charlie guevara

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hkv
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Re: Desmid - Closterium

#7 Post by hkv » Thu Jan 25, 2018 6:46 pm

charlie g wrote:What a delicate crystalline crescent you share with us, thank you hkv..this evokes our crescent moon, complete with some 'green cheese'. Regards to an ID...I'm 'chiken' to advise you..but I will peek at my vintage library texts. Was this image capture from a fresh collected specimen? Charlie guevara
Thanks all, and thanks charlie! Yes, freshwater specimen alive and kicking. I found a samole bottle that had been sitting in the garage with the screw cap on since april 2017. I noticed some green residue at the bottom and decided to take a look. Pediastrum and some other algae and these Closterium.

charlie g
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Re: Desmid - Closterium

#8 Post by charlie g » Thu Jan 25, 2018 6:51 pm

I asked if this delicate protest was fresh collected/fresh observed due to the marked changes in the twin 'semi-cells' chloroplasts.

The very wide central gap (clear space in the middle of this desmid) suggests to me ( here we go with Charlie g's long shot...gulp!) you have a specimen of Closterium which is undergoing mitosis.

"The Biology of Desmids", Alan J. Brook, 1981, page # 104: " Several investigators have described cell division in Closterium....observations show that as mitosis proceeds the central gap between the chloroplasts of adjacent semicells widens as the spindle elongates.".

Then page # 106 has sequence of Closterium species stages...your individual,hkv, fits nice in the illustrated sequence of desmid appearances of my text.

Quite a few Closterium species...I don't have illustrated 'desmid atlases'! thanks for this image capture...again I ask...was it fresh collected/ fresh observed? Charlie guevara

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Re: Desmid - Closterium

#9 Post by charlie g » Thu Jan 25, 2018 6:53 pm

Great that you share with us the value for live organism microscopy which 'bottled/self contained microcosms' often offer us! Charlie guevara

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hkv
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Re: Desmid - Closterium

#10 Post by hkv » Thu Jan 25, 2018 7:24 pm

charlie g wrote:...again I ask...was it fresh collected/ fresh observed? Charlie guevara
Yes, It was fresh observed. I sucked it out of the bottle and put in onto the slide with a water film. #1 cover slip. A lot of movement inside the desmid. Especially at the ends where a lot of small organelles were tumbling around.

JimT
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Re: Desmid - Closterium

#11 Post by JimT » Thu Jan 25, 2018 10:14 pm

A lot of small organelles were tumbling around.
A very healthy Closterium. I very much enjoy observing the Brownian motion of the organelles.

JimT

charlie g
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Re: Desmid - Closterium

#12 Post by charlie g » Fri Jan 26, 2018 1:27 am

Yes, yes, Jim T and hkv..those end compartments host 'tiny snow-globes' so to speak of gypsum granules...which beguilingly jiggle and tumble in Closterium desmids. Charlie g

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billben74
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Re: Desmid - Closterium

#13 Post by billben74 » Mon Feb 05, 2018 9:05 pm

They are great subjects. As ever with your images beautifully taken

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hkv
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Re: Desmid - Closterium

#14 Post by hkv » Tue Feb 06, 2018 9:38 pm

billben74 wrote:They are great subjects. As ever with your images beautifully taken
Thanks!

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Jonnyvine
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Re: Desmid - Closterium

#15 Post by Jonnyvine » Wed Mar 14, 2018 4:51 pm

Brilliant image :o :mrgreen:

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