Abstract
Previous research group showed that when plants Guzmania monostachia, a facultative C3-CAM specie, are subjected to water shortage, formed a gradient of acidity and activity of the enzyme phosphoenolpyruvate carboxylase (PEPCase) along the leaf length, and the apex portion that expressed more strongly the CAM. Regarding the activity of redutase do nitrato (NR), it was observed that for an…