A) deep green foliage
B) loss of pigments in petals
C) early flowering
D) yellowing of leaves
Correct Answer: D
Solution :
| [D] Nitrogen is the constituent of amino acids, proteins, nucleic acids, nucleotides coenzymes, hexoamines etc. Deficiency of nitrogen repidly inhibits the plant growth and yellowing of the leaves (chlorosis) magnesium has the specific role in the activation of enzymes, taking part in photosynthesis, respiration. It also forms a part of the ring structure of the chlorophyll molecule. Deficiency of Mg causes chlorosis i.e., yellowing of leaves. Deficiency of both Nitrogen and Magnesium causes chlorosis (yellowing of leaves). Thus a plant growing in magnesium-deficient soil would show chlorosis inspite of being sprayed with urea (nitrogen). |
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