A question about an image from a video I made

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billporter1456
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A question about an image from a video I made

Post by billporter1456 »

I made a little video a couple of months ago and am thinking of turning it into a YouTube video. The darkfield images are what I believe to be a Stentor as it slowly swam through the water. As I watched the video I could see what I thought was the gullet of the Stentor. I refer to the light-colored structure snaking through the organism. The image below was taken from the video as a screenshot. I would love to have some confirmation that it is, indeed, the gullet before I describe it as such on a YouTube video. Any help will be appreciated.Image

carlos.uruguay
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Post by carlos.uruguay »

it is the nucleus

billporter1456
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Thanks!

Post by billporter1456 »

carlos.uruguay wrote:it is the nucleus
I guess that because it is in darkfield it shows up as ribbon-like instead of like a string of beads?

carlos.uruguay
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Post by carlos.uruguay »

Many stentor species have the nucleus with ribbon shape

Bruce Taylor
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Post by Bruce Taylor »

More specifically, it's the macronucleus. Without getting into the details of ciliophoran cell biology (I would enjoy that, but this is a photography forum, after all! :D ), the macronuclei of ciliates are often large and conspicuous structures, easily seen and useful for identification. Their shapes are quite variable, and are often used by taxonomists as criteria for differentiating species.

Among Stentors, macronuclei come in 5 basic types: single bead, double bead, long string of beads, lumpy nodular band, and long smooth band. The one in this image is of the last kind (vermiform, or wormlike, with no nodular lumps).

As Carlos says, vermiform macronuclei are found in several species. The most common is the morphological species Stentor roeselii.
It Came from the Pond (Blog): http://www.itcamefromthepond.com/

billporter1456
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Thanks Bruce and Carlos!

Post by billporter1456 »

Bruce Taylor wrote:More specifically, it's the macronucleus. Without getting into the details of ciliophoran cell biology (I would enjoy that, but this is a photography forum, after all! :D ), the macronuclei of ciliates are often large and conspicuous structures, easily seen and useful for identification. Their shapes are quite variable, and are often used by taxonomists as criteria for differentiating species.

Among Stentors, macronuclei come in 5 basic types: single bead, double bead, long string of beads, lumpy nodular band, and long smooth band. The one in this image is of the last kind (vermiform, or wormlike, with no nodular lumps).

As Carlos says, vermiform macronuclei are found in several species. The most common is the morphological species Stentor roeselii.
That's great information and I appreciate it. I just downloaded a book that you (Bruce) recommended in a post a couple of years back. I've just started reading it and it looks like it will be a terrific resource on Stentors. I like photographing them because of two qualities, they are LARGE and they usually don't move so fast that they leave my field of view. By the way, in case anyone reading this wants to know about the book you recommended, here's a quote from you post:

"Tartar's book _Biology of Stentor_ can be freely downloaded from the internet archive: http://archive.org/details/biologyofstentor00tart "

carlos.uruguay
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Post by carlos.uruguay »

I am sorry Bruce
What I will say now has no relationship with you.
Billporter1456, for a theme of education you should thank all those who comment your post

billporter1456
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Thannks, Carlos!

Post by billporter1456 »

carlos.uruguay wrote:I am sorry Bruce
What I will say now has no relationship with you.
Billporter1456, for a theme of education you should thank all those who comment your post
The subject line of my post right after your first post in this thread was, "Thanks!" The subject line of my last post was, "Thanks Bruce and Carlos!"

Was there someone else I was supposed to thank? Or was my thanks supposed to be in the text of the post instead of the subject line? I am pretty new to this and will surely make mistakes, so I apologize if I have offended you in some way. Just let me know the etiquette of the forum and I will do my best to comply with it.

carlos.uruguay
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Post by carlos.uruguay »

Excuse me your my!!
My english is lousy and not read well the messages
Forgive!!

billporter1456
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Post by billporter1456 »

carlos.uruguay wrote:Excuse me your my!!
My english is lousy and not read well the messages
Forgive!!
No need to apologize! I am sure your English is far better than my ability to use your native language. I should have put my thanks to you in the text of my post. I'll do better next time. I hope to ask more questions in the future because the members of this forum have such great knowledge about microscopes and the pond water creatures I am learning about.

And finally, thanks Carlos for replying so promptly to my last post!

Regards,
Bill

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