Where do algae get their nitrogen from?
Michael Dorsett Onken
mdonken at artsci.wustl.edu
Sat Oct 24 15:34:59 EST 1998
axelboldt at my-dejanews.com wrote:
: how do cyano bacteria and algae take in nitrogen?
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Algae get their nitrogen the same way higher plants do: from nitrates and
nitrogenous compounds in the water.
Cyanobacteria are a different story because they can also fix nitrogen,
i.e. convert elemental nitrogen, N2, into molecular nitrogen like ammonia.
Our atmosphere is 80% N2, and the gas is soluble in water, so there is
plenty of it available for them to fix.
(Nitrogen gas and ammonia are sufficiently small and non-polar to pass
directly through the plasma membrane without assistance.)
Mike Onken -. .-. .-. .-. . E-mail:
Molecular Cell ||X|||\ /|||X|||\ /| mdonken at artsci.wustl.edu
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