question_answer 13)

Deficiency symptoms of an element tend to appear first in young leaves. It indicates that the element is relatively immobile. Which one of the following elemental deficiency would show such symptoms? (a) Sulphur                          (b) Magnesium                 (c) Nitrogen                         (d) Potassium  

Answer:

                  (a) The sulphur is needed by young leaves, stem and root tips. If it is not available, these parts would show the deficiency symptoms which include reduced growth (ii) extensive root growth (iii) hard and woody stem (iv) chlorosis of young leaves. The immobile elements are transported in plant up to the tip level, so their deficiency appear first at the tips of growing apices of roots and shoot.