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Cyanobacterium Oscillatoria high speed video

 
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carlos.uruguay



Joined: 23 Feb 2012
Posts: 5055
Location: Uruguay - Montevideo - America del Sur

PostPosted: Sat Feb 17, 2018 1:58 pm    Post subject: Cyanobacterium Oscillatoria high speed video Reply with quote

Phase contrast
Oblique polarized light
20X and 40X objectives
Panasonic GH4 camera
Video link:
https://www.youtube.com/watch?v=Z7BZDCKwWOw
Video frame only for preview (to observe the movement, watch the video):

Regards
carlos
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Jacek



Joined: 02 Oct 2011
Posts: 5123
Location: Poland

PostPosted: Sat Feb 17, 2018 3:10 pm    Post subject: Reply with quote

Very nice Very Happy
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carlos.uruguay



Joined: 23 Feb 2012
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Location: Uruguay - Montevideo - America del Sur

PostPosted: Sat Feb 17, 2018 3:44 pm    Post subject: Reply with quote

Thanks!
They always move forward and then they recede
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WalterD



Joined: 06 Jul 2015
Posts: 412
Location: Rotterdam, the Netherlands

PostPosted: Sun Feb 18, 2018 12:27 am    Post subject: Reply with quote

Very interesting clip! It's almost like it has got its own propulsion.
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carlos.uruguay



Joined: 23 Feb 2012
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Location: Uruguay - Montevideo - America del Sur

PostPosted: Sun Feb 18, 2018 6:27 am    Post subject: Reply with quote

WalterD wrote:
Very interesting clip! It's almost like it has got its own propulsion.

Thanks Walter. Yes, all the times I have observed them, they move by turning, they advance and then they retreat. I do not know the mechanism by which they manage to move.
See:
https://www.youtube.com/watch?v=VPNj7n6lTf8
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Sumguy01



Joined: 28 Jan 2013
Posts: 1196
Location: Ketchikan Alaska USA

PostPosted: Sun Feb 18, 2018 8:53 am    Post subject: Reply with quote

Very nice
Thanks for sharing.
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Bruce Taylor



Joined: 23 Jun 2011
Posts: 779
Location: Wakefield, Quebec / Ottawa, Ontario

PostPosted: Sun Feb 18, 2018 8:55 am    Post subject: Reply with quote

carlos.uruguay wrote:
I do not know the mechanism by which they manage to move.


Nice video, Carlos!

The old theory for "gliding motility" was that it was accomplished through the secretion of "polysaccharide slime." However, recent work suggest that polysaccharide secretions provide a sort of track for the colony to glide along, but the motility is provided by small filaments called "Type IV pili", which are repeatedly extended and retracted by the cell, like tiny "grappling hooks."

http://onlinelibrary.wiley.com/doi/10.1111/mmi.13242/full
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carlos.uruguay



Joined: 23 Feb 2012
Posts: 5055
Location: Uruguay - Montevideo - America del Sur

PostPosted: Sun Feb 18, 2018 9:31 am    Post subject: Reply with quote

Bruce Taylor wrote:

Nice video, Carlos!

The old theory for "gliding motility" was that it was accomplished through the secretion of "polysaccharide slime." However, recent work suggest that polysaccharide secretions provide a sort of track for the colony to glide along, but the motility is provided by small filaments called "Type IV pili", which are repeatedly extended and retracted by the cell, like tiny "grappling hooks."
http://onlinelibrary.wiley.com/doi/10.1111/mmi.13242/full


Tnahks Burce!!!!!!!!!!!!!!
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Smokedaddy



Joined: 07 Oct 2006
Posts: 1194
Location: Phoenix, Arizona

PostPosted: Sun Feb 18, 2018 11:34 am    Post subject: Reply with quote

Interesting video, nice job Carlos.
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carlos.uruguay



Joined: 23 Feb 2012
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Location: Uruguay - Montevideo - America del Sur

PostPosted: Sun Feb 18, 2018 11:59 am    Post subject: Reply with quote

Thanks!
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GaryB



Joined: 29 Jul 2016
Posts: 521

PostPosted: Mon Feb 19, 2018 5:26 pm    Post subject: Reply with quote

Excellent! That phase shot was gorgeous.
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carlos.uruguay



Joined: 23 Feb 2012
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Location: Uruguay - Montevideo - America del Sur

PostPosted: Mon Feb 19, 2018 6:09 pm    Post subject: Reply with quote

Thanks Gary!
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