Metallogenium

Images made through a microscope. All subject types.

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gjones
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Joined: Tue Apr 27, 2010 6:44 am
Location: Fort Collins, CO.

Metallogenium

Post by gjones »

A bacteria from a reservoir in the Rocky Mountains.
A particular genus of bacteria, known
historically as Metallogenium, can form starshaped
manganese oxide minerals (called metallogenium)
through the action of manganese
oxide precipitation along its surface.

From MANGANESE, METALLOGENIUM, AND MARTIAN MICROFOSSILS. L.Y. Stein and
K.H. Nealson, Jet Propulsion Laboratory, 4800 Oak Grove Drive, MS 183-301, Pasadena, CA
91109, steinl@gps.caltech.edu.

A Nikon Optiphot using Hoffman Modulation ContrastImage
Grant Jones

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

Post by Mitch640 »

Very nice. I have wondered about living organisims that can produce metals. I think I might have had gold in mind though. Wouldn't that be something? LOL

rjlittlefield
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Post by rjlittlefield »

Mitch640 wrote:I think I might have had gold in mind though. Wouldn't that be something?
That's no longer as outlandish as it would have seemed once upon a time. See http://www.abc.net.au/science/k2/trek/4wd/Over44.htm.

Grant, nice image! Are these critters, or something similar, involved in the famous manganese nodules on the ocean floor? Or are those solely chemistry?

--Rik

Craig Gerard
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Joined: Sat May 01, 2010 1:51 am
Location: Australia

Post by Craig Gerard »

Grant,

This must be one of the first Hoffman Modulation Contrast images I have seen on PMN.

Intriguing topic, even more so with the addition of Mitch's contemplation and after reading the contents of the link Rik posted.

Craig
To use a classic quote from 'Antz' - "I almost know exactly what I'm doing!"

gjones
Posts: 63
Joined: Tue Apr 27, 2010 6:44 am
Location: Fort Collins, CO.

Metallogenium

Post by gjones »

Image
Grant Jones

gjones
Posts: 63
Joined: Tue Apr 27, 2010 6:44 am
Location: Fort Collins, CO.

Metallogenium

Post by gjones »

I forgot the text.

There is not very much on the life cycle of these organisms because they are hard to culture and when they are cultured they might not look like they do in the environment. This photo was taken from a raw water sample at a water treatment plant along the front range of the Rockies. At times these bacteria can make up to 35% of all particles > 5 microns in the raw water. Another Mn bacteria present is Plantomyces.
Grant Jones

René
Posts: 467
Joined: Sun Oct 08, 2006 4:22 am

Post by René »

Ah, that's the one I always come across! Thanks for the text.

Rene

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