Question

Which of the following statements are correct?
(i) The deficiency of any element can cause multiple symptoms
(ii) Same symptoms may be caused by the deficiency of one or several different elements
(iii) The concentration of the essential element below which plant growth is retarded is termed as critical concentration
(iv) Chlorosis is the loss of chlorophyll due to deficiency of N, K, Mg, Fe, S, Mn, Zn, Mo.
(v) Different plants respond differently to the deficiency of the same element.

• A. (i), (ii), (iii), (iv) and (v)
• B. (i) and (iv)
• C. (i) and (iii)
• D. (iii) and (v)

Answer 1

The correct option is A (i), (ii), (iii), (iv) and (v)

(i) The deficiency of any element can have its effect on several parts of a plant and the part of the plant that gets affected depends upon the mobility of the element.

(ii), (iv)The same symptom may be shown by the deficiency of several different elements. E.g: chlorosis characterised by the yellowing of leaves may be caused by the deficiency of N, K, S, Fe, Mg, Mo, Mn and Zn.

(iii) Critical concentration is the concentration of the essential element below which plant growth is retarded.

(v) Different plants respond differently to the deficiency of the same nutrient. E.g: different plants within the same species or different species of plants react differently to low levels of phosphorus in soil.

So, the correct option is '(i), (ii), (iii), (iv) and (v)'.