anoxygenic versus oxygenic - link with (an)aerobic (Oct/18/2009 )

Dear all,

I have the following questions.

I have been studying the oxygenic versus the anoxygenic bacteria and as far as I understand it, I simply summerise it as: the oxygenic ones produces O2 as a byproduct when H2O gives away 2 electrons (H2O gets oxidised) and the anoxygenic ones do not produce O2.

For the anaerobic one I simple define it as: those bacteria that do not require O2 for the respiration and those that do require O2 as an electron acceptor whe speak of aerobix ones.
(I know this is a very simplified version of the real facts).


So is it is correct to state that their are (or their might be) anoxygenic bacteria that are aerobic?
(This however seems srange since they do not produce O2, but still use O2 for their respiration since they are aerobic).

And is it also correct to state that a anaerobic bacteria can not be a oxygenic one since O2 is leathel for the strict anearobics?
(meaning that a facultative anaerobic bacteria can indeed be oxygenic?)

So you in general you can combine anoxygenic with both aerobic and anaerobic (either strictly, facultative or tolerant) but you can only speak of oxygenic aerobe bacteria or exeptionally oxygenic facultative or tolerant aerobic ones and NOT oxygenic strictly anaerobic ones.

Or is this not correct?

Can you give us examples of the bacterial groups you suggest?

GeorgeWolff on Oct 21 2009, 11:57 PM said:

How do you mean?

Isnt this a general thing?

auxothropic bacteria that can do photosynthesis either anoxygenic or oxigenic and are aerobic or anaerobic in terms of respiration?