functions of Potassium in plants
Potassium intake is greater than the other element other than nitrogen. moves from older to younger body organs in plants. For this reason, young leaves have more potassium content than old leaves. In plants, potassium does not bind in the form of organic compounds. For these reasons, at the end of the growing season, potassium can be lost from the plant as a result of washing, and a little potassium is transferred from the roots to the soil. Potassium is an essential element for most enzyme activities. Therefore, important chemical changes occur in plants that do not contain enough potassium. For example, soluble carbohydrates are accumulated, the amount of starch decreases and increases the amount of soluble nitrogen compounds.
Potassium deficiency in plants
In potassium deficiency, the growth of plants regresses and this is followed by yellowing (chlorosis) and spotting (necrosis). Deficiency symptoms are primarily seen in old leaves. Deficiency symptoms occur primarily at the leaf edges and tips of most plants. Leaf edges first turn yellow and then turn dark brown. If the deficiency is very severe, these parts die and dry out. Turgor pressure decreases in plants in potassium deficiency. If there is not enough potassium in the environment, protein synthesis cannot be performed sufficiently because the absorbed nitrogen is converted into independent amino acids.
Symptoms are usually on older leaves on the underside of seasonally growing shoots. They are characterized by burns on the tips of the leaves. In stone fruits, chlorosis (jaundice) is clearly evident with the development of upward lateral (lateral) bending and blight. A heavy fruit load accentuates these symptoms. Studies state that is a reverse relationship between potassium and fruit load. Therefore, the lighter the fruit load, the more potassium need increases.
No known visual symptoms can be directly associated with an excess of potassium. However, magnesium deficiency tends to appear when high levels of potassium are present.