Important enzymatic activator, regulator of stomata opening and closing. Tissue turgidity regulator. Contributes to protein and carbohydrate synthesis. It helps in the transport of substances elaborated in the leaves to other organs.
Prevents excessive breathing. It increases the plant’s resistance to frost, drought, salinity, lodging and certain pests and diseases.
Deficiency – Causes reduced plant growth. Symptoms first appear as white chlorosis on the tips of older leaves. As the degree of deficiency intensifies, the tissue becomes brown and necrotic at the leaf tip and the symptom progresses along the leaf margin, developing further in the middle of the leaf.