Lecture notes
Micorbes
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Lecture notes of 1 pages for the course Science at (Abou microbes)
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just history though. They also might suggest different futures for us,providing us with the means to understand how we can use bacteria
for everything from farming to cleaning up oil spills. But identifying
and understanding these consortia is challenging.
James, our master of microscopes, has been baffled by what looks
like a bunch of logs glued together. He thought there might be
flagellates in there along with the prokaryotes. But when he tried
separating the individuals, he couldn't find any. So for now, like
most of the consortia we've been looking at, the mechanics of this
group remain unclear to us.
Perhaps the best studied consortium is Chlorochromatium
aggregatum, the small green group we watched in the beginning of
this episode. They are found in lakes and ponds, typically in areas
with low amounts of oxygen and light. The green bacteria are
Chlorobium chlorochromatii, a green sulfur bacteria that are
photosynthetic, but that are surprisingly adept at living in low-light
situations. And yet, they do still need light, which would be fine,
except that green sulfur bacteria have a problem: they cannot swim.
There are ways around this problem, like the green sulfur bacteria
that just go up in the water column by producing gas vacuoles. It's
like balloon travel in the Microcosmos. And much like actual balloon
travel, it can take a few days for the bacteria to get where they want
to go, so not always the optimal choice. But that is not a problem for
Chlorobium chlorochromatii because they have found a different
way to get around the Microcosmos. A colorless, rod-shaped
bacteria called Candidatus Symbiobacter mobilis.
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