Question

Match List I with List II

Choose the correct answer from the options given below:

• A. A (I), B (II), C (III), D (IV)
• B. A (IV), B (III), C (II), D (I)
• C. A (IV), B (I), C (II), D (III)
• D. A (III), B (IV), C (I), D (II)

Hint:

Xanthomonas = Mesophyll; Ralstonia = Xylem vessels; Rhizoctonia = Leaf sheath; Liberobacter = Phloem sieve tubes.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Plant pathogens exhibit precise anatomical tissue tropism within the host plant.

Step 2: Detailed Explanation:
Matching pathogens with their primary infected host tissues:
1. Xanthomonas axonopodis (A) $\to$ Enters stomata/wounds to colonize leaf Mesophyll parenchyma (IV).
2. Ralstonia solanacearum (B) $\to$ Invades and blocks vascular Xylem vessels causing bacterial wilt (I).
3. Rhizoctonia solani (C) $\to$ Colonizes leaf Sheath tissues causing sheath blight of rice (II).
4. Liberobacter Candidatus Liberibacter (D) $\to$ Obligate phloem-limited bacterium colonizing Phloem sieve elements causing citrus greening (III).

Step 3: Final Answer:
Matching summary: A $\to$ IV, B $\to$ I, C $\to$ II, D $\to$ III.