carbon fixation of conifers

[dae]

What carbon fixation pathway do conifers use? Is it CAM? I haven't found an explicit answer yet.

Thanks!

[F4T32008]

CAM? day and night respiration?
I think conifers use C4 type.

But I'm not too sure... Maybe they are C4

[MrMistery]

Well, I don't know if you can say anything about all conifers, but certainly some use C3 metabolism. It would make no sense, for example, for a pine tree in Northern Russia to use the C4 pathway as the C4 pathway evolved as a pathway to reduce photorespiration when it's hot. But, as some conifers live in hot climates, it may be totally possible for some to have C4 metabolism. I know for sure that there is one(and only one) conifer that uses the CAM pathway: Welwishia.