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Does all photosynthesis use CO2?

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Does all photosynthesis use CO2?

Postby dae » Thu Oct 15, 2009 4:05 pm

I can't find an easy answer to this online, so does all photosynthesizing life use carbon dioxide (or carbonic acid/bicarbonate/carbonate) as the source of carbon?

Thanks!
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Postby JackBean » Thu Oct 15, 2009 10:13 pm

That's definitelly good question :) We have always learned about different hydrogen donors, but never about this :)
As there are, besides photoautothrophs (like plants etc.), also photoheterotrophs, I would guess yes, also other compounds can be found. Try to find more about them and maybe will you find your answer ;)
http://www.biolib.cz/en/main/

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Re: Does all photosynthesis use CO2?

Postby JackBean » Thu Oct 15, 2009 10:17 pm

OK, bad shot
http://www.oxygraphics.co.uk/anoxy.htm
"Although the amount of bacteriochlorophyll in these photoheterotrophs is lower than in other photosynthetic bacteria, they are capable of fixing CO2 during photosynthesis, and light enhances their growth."

So then, I guess yes, all of them use CO2 :lol: :( :roll:
http://www.biolib.cz/en/main/

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Postby MrMistery » Fri Oct 16, 2009 3:18 am

yeah, I think all of them use CO2, since i have never heard of photosynthesis without Rubisco.
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
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