Zn is a constituent of three enzymes involved in photosynthesis, root respiration and oxidation. It also influences the translocation and transport of P in plants.

Zn deficiency causes a characteristic interveinal chlorosis of the younger leaves. Small white or light yellow chlorotic patches develop between the veins and then, successive leaves produced become smaller and more chlorotic. The leaf lobes become narrow, light green to white in colour with the margins cupped upwards. Leaf tips turn necrotic under severe conditions. The basal lobes often tend to point away from the stem. Since the growing point is most affected, Zn deficiency drastically reduces plant growth and yield. Cassava is found exceptionally susceptible to Zn deficiency and its continuous monoculture definitely leads to Zn deficiency. Zn deficiency is prevalent in both acid and alkaline soils.