Cell connections in Volvox

Images made through a microscope. All subject types.

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NikonUser
Posts: 2688
Joined: Thu Sep 04, 2008 2:03 am
Location: southern New Brunswick, Canada

Cell connections in Volvox

Post by NikonUser »

Dr. Wagner showed some very thin cytoplasmic strands (plasmodesmens) between individual cells of a Volvox colony
HERE
Below is an image showing single and double cytoplasmic strands.
Full frame of width 92µ, making the cytoplasmic strands just 0.64µ in width.
BHS DIC 100x S Plan, 1.25x intermediate lens, 2.5x relay lens
Image
NUM10135
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives

Mitch640
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Joined: Sun Aug 15, 2010 1:43 pm

Post by Mitch640 »

I still have yet to even find a Volvox here. Wrong time of year now though. Do they like cleaner water, rather than a muddy river?

Just wondered, is this an oil lens? It shows a pretty interesting structure.

NikonUser
Posts: 2688
Joined: Thu Sep 04, 2008 2:03 am
Location: southern New Brunswick, Canada

Post by NikonUser »

Yes Mitch, this is with the Olympus 100x NA 1.25 oil.

These Volvox came from the outflow of a clean lake, collected in early October and obviously happy (!) in my near-freezing aquarium. Happy because, as of today, they are still increasing in numbers; as are the testate Amoeba. A few weeks back I had dozens (perhaps hundreds) of Stentors but they appear to died out. The green Paramecium are increasing in great numbers.

As my Volvox are surviving in very cold water I suspect you may be able to find some in a local waterway (clean lake/pond?)
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives

Mitch640
Posts: 2137
Joined: Sun Aug 15, 2010 1:43 pm

Post by Mitch640 »

All still water here is frozen over, solid. The Mississippi might have some open spots I could get to, but it's like a mud spa, even in the best of times. It's why I asked about clean water. I suspect that anything that needs sunlight to live can not live in the Mississippi, as light would not go into the water very far. Right now, the only clean water is running in a creek just behind where I live. I have never sampled that yet, as it's hard to get down to it. Lakes and ponds are going to have to wait till spring. :)

My aquarium was doing real good till last week. Then I bought some water plants and added them. The aquarium was nice and foggy with microbes, then I put the plants in. I guess the extra oxygen has killed some of the microbes, cause the water has cleared up a lot. I do still have lots of little, just barely see able pods of some sort. Not shrimp, some tiny little white things that I haven't succeeded in catching yet. And lots of stuff growing on the plant leaves. As soon as I have some time, I'll find plenty to look at.

Jbailey
Posts: 520
Joined: Sat Jul 05, 2008 6:45 am
Location: Wisconsin, USA

Post by Jbailey »

Very interesting photo. That's really close-up.

My only find of Volvox was in a very clear storage pond on a local golf course (in Wisconsin). There was a lot of excellent Spirogyra, too.


Jim

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