My, oh my.

Didn't you wander off-topic into outer space?!!!

If they know how to use spell checking on other planets, why don't you?

Photosynthetic bacteria are still bacteria even though they were once
mistakenly called blue-green algae.

Since the oceans cover more than 70 percent of the earth's surface, the
answer to the original question is still YES.


"Ivan Kobrinsky" wrote in message
ups.com...
Cereus-validus:

Yes. Only as deep as the light reaches.

In the context it is important to consider that sunlight
only can penetrate about 100 to 200 meters deeply into the
sea. In deeper levels (like in more about 2 400 meters sea
depth) photosynthesis is also manufactured. There are living
bacteria, that - like plants - the light for power production
use completely without daylight.

For this feat they are using completely special light.
Instead of the sun the green sulfur bacteria use the weak
jets of hot sources of the deep sea for their photosynthesis.

The bacteria are thereby the first well-known organisms,
which are capable of photosynthesis without sunlight.

The special at the fact is very now that these bacteria can
live at other athmposphere than ours too.



So our current big question becomes whether photosynthesis also
exists on other planets... do exist on other planets in our
sunsystem, under the most adverse conditions photosynthesis
is possible.

Well, on fact the tiny microbes pointed out that the
"photosynthesis is not limited by any means only to the
surface of our planet"[*]

It is conceivable for example that appropriate bacteria on
the Jupitermond Europe are at the soil under a thick ice
cover assumed liquid seas. The researchers filtered the
bacteria from water tests, which took her in the proximity
of the hydrothermalen sources. As you know certainly, the
majority of the well-known representatives of the Archaea
under most extreme local conditions can exist, e.g. at low
pH or in satisfied salt solutions - or like this way the
microbes live in very high temperatures of approximately
350 degrees Celsius in a "breath-thin gap" between that
cooking hot spring waters and the ice-cold (2 degrees C.)
sea depth.

Their ability to use this extremely weak light of the hot
sources to photosynthesis and thus for power production
they owe to a singular antenna system.

This consists of an extremely sensitive chlorosom-complex,
which catches even the smallest reachable light and it for
the reaction cente of the organism transfers, where then
actual photosynthesis takes place, as Robert Blankenship
of the University of Arizona described.



[*] Have a look at online-before-print version that presents
now the international researcher team in PNAS:
"An obligately photosynthetic bacterial anaerobe from a
deep-sea hydrothermal vent";
http://www.pnas.org/cgi/content/abstract/0503674102v1