CAM and fotorespiration

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Justazz
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CAM and fotorespiration

Post by Justazz » Wed Mar 12, 2008 11:38 pm

Hi, I have 1 little question. How CAM plants prevent fotorespiration? or don't they? I understand why in C4 plants fotorespiration doesn't occures, but CAM is mystery for me.

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Post by Cat » Thu Mar 13, 2008 2:08 am

Not prevent, but minimize photorespiration. They concentrate CO2 same as C4 plants, but by a different process. Look up crassulacean acid metabolism for details.

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MrMistery
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Post by MrMistery » Thu Mar 13, 2008 10:15 am

the reason is the same as in C4, only that in CAM there is a temporal separation rather than a spatial one.
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Justazz
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Post by Justazz » Thu Mar 13, 2008 9:25 pm

But CO2 fixation and calvin cycle proceed in the same mesophill cell. When stomata is closed, O2 concentration and propability for RuBp to bind with O2 is rising. So I think photorespiration is at the same level like in C3 plants

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