SSC MTS EXAM

Detailed explanation-1: -Phosphorus deficiency commonly causes older leaves to curl, distort, and remain smaller than normal. Unusually purple leaf veins and tip dieback from phosphorus deficiency.

Detailed explanation-2: -This imbalance of rates in phosphorus deficient plants leads to the buildup of excess carbohydrate within the plant. This carbohydrate buildup often can be observed by the darkening of leaves. In some plants the leaf pigment change as a result of this process can turn leaves a dark purplish color.