It actively acts in photosynthetic activities, respiration, circulation of sap in the plant, participates in the formation of starch in the leaves and contributes to the graining phase of the fruits.
Deficiency – Starts on the leaves with a yellowing at the tips and margins that evolves to brown. In the necrotic area it is possible to find a small yellow outline. Potassium-deficient fruits tend to be light and flat.