Abstract:The activities of fructose 1,6-bisphosphatase, NAD-dspendent glyceraldehyde-3-phosphatedehydrogenase, phosphoenolpyruvate carboxylase, phosphoenolpyruvate phosphatase and pyruvate kinase isolated from peanut leaves were inhibited by 5 mmol/L of Ca2+. When peanut sablings weregrown in Hoagland solution containing 0, 5 or 15 mmol/L of Ca2+, fructose 1,6-bisphosphalase(FBPase) and phosphoenolpyruvate carboxylase (PEPCase) showed the highest aedvity at 5 mmol/Lof Ca2+, but the highest aCtivity of pyruvate kinase (PK) was found at 0 mmol/L Ca2+.Photosynthetic and respiratory rates showed a similar changing trend as the activities of FBPase,PEPCase and PK. The high concentration of Ca2+ (15 mmol/L) enhance the chlorophyll content.
