Match List-I with List-II
Choose the correct answer from the options given below:
Show Hint
Remember that Fe, Ca, S, and Cu are immobile in plants.
Therefore, their deficiency symptoms always appear first on the youngest, topmost leaves of the plant.
Step 1: Understanding the Concept:
Nutrient deficiency symptoms are diagnosed based on the appearance of chlorosis, necrosis, and tissue distortion on the leaves.
The location of the symptoms (young vs. old leaves) depends on the mobility of the nutrient within the plant vascular system. Step 2: Detailed Explanation:
- (A) Completely yellowish-green leaves with yellow veins: This symptom is characteristic of Sulfur (S) deficiency. Because sulfur is immobile, symptoms appear first on young leaves. Unlike nitrogen deficiency where the veins remain green initially, sulfur deficiency causes the entire leaf blade, including the veins, to turn uniformly yellow. Thus, (A) matches (IV).
- (B) Yellow or pale yellow to white leaves with green veins: This is a classic symptom of Iron (Fe) deficiency, known as interveinal chlorosis on young leaves. Since iron is highly immobile, the younger leaves turn pale yellow to almost white, while the veins remain sharply green. Thus, (B) matches (III).
- (C) Youngest leaf with white, withered and twisted tip, dieback: This symptom is a diagnostic indicator of Copper (Cu) deficiency. Copper is essential for photosynthesis and cell wall strength. Its deficiency causes the tips of young leaves to twist, turn white, wither, and eventually die back. Thus, (C) matches (II).
- (D) Yellowish leaves with brownish spots: This symptom is characteristic of Calcium (Ca) deficiency. Calcium is immobile and essential for structural cell walls in growing meristems. A lack of calcium causes young leaves to become distorted with necrotic brown spots. Thus, (D) matches (I).
Matching these pairs results in: (A)-(IV), (B)-(III), (C)-(II), (D)-(I). Step 3: Final Answer:
The correct matching sequence corresponds to option (B).
