Question

Yellowish edges appear in leaves deficient in

• A. $C{a}^{2+}$
• B. $M{g}^{2+}$
• C. $K^{+}$
• D. Sulphur
• E. Molybdenum

Answer 1

Answer: (C)

$K^{+}$

Potassium is absorbed by the plant in the form of potassium ions. It is required by the plant more abundant quantities in the meristematic tissues, buds, leaves and root tips. It helps in maintaining anion-cation balance and turgidity in cells. It's deficiency cause marginal or apical yellowing of leaves.

So the correct answer is 'K+'.