Plant cells require potassium for water, nutrients, and carbohydrates transportation. Potassium is also important for enzyme activation in plant cells. These enzymes are essential for protein and starch synthesis and the production of ATP. Another very important role of Potassium is to control the opening and closing of stomata. This helps in maintaining the water balance in the plant and also the mobilization of water vapor, oxygen in the plant, and carbon dioxide exchange in leaves. Potassium also plays a role in increasing resistance against diseases and pests.
Another important element that plays a vital role in food and sugar transportation is Boron. Use of Boron therefore helps in increasing sweetness of fruits along with Potassium.
Foliar sprays of Potassium and Boron helps in increasing the weight of fruits, color, palatability, and shelf life and decrease acidity.