Mafacopper acts as copper supplier, a basic component from different proteins involved in the photosynthesis, breathing and lignification. When a fault in copper exists, the activity of enzymatic proteins decrease. In case of the photosynthetic process, if there is a reduction in the plastocyanin rate (the enzyme which contains copper), the electron transportation remains negatively affected and, therefore, the CO2 fixation, which decreases the quantity of photosynthates.