Paphiopedilum are C3 plants, and they can certainly open and close their stomata, I have scientific journals to back this up. All plants can have their stomata open, but there are plants that can become physiologically confused, and forget how to close them. This is what often happens to deflasked plants trying to acclimatize. I do not believe there are any plant types that cannot naturally close their stomates unless there is some irregularity. There would be no reason to have stomates if they could not regulate them. Being that there is an exception to every rule, there might be some. However being that we have not heard of it, it is either amazingly rare or does not exist. I challenge everyone to investigate this myth. I will have a definite answer to this question within a week.
Steve Toplez Nascent Orchids Karen> I believe there are orchid of all types , some open and close the Karen> stomata, while others remain open (aint this type called C3 and Karen> considered the more primitive form?). It all depends on the habitat Karen> the orchid species evolved for, general rule as I remember it is that Karen> thick leaved types are more like to have evolved into CAM type of Karen> plants. Karen> Rgrds/ Karen >> This is faulty information. Orchids can open and close stomata Karen> _______________________________________________ Karen> the OrchidGuide Digest (OGD) Karen> orchids@orchidguide.com Karen> http://orchidguide.com/mailman/listinfo/orchids_orchidguide.com _______________________________________________ the OrchidGuide Digest (OGD) orchids@orchidguide.com http://orchidguide.com/mailman/listinfo/orchids_orchidguide.com
