Question

Match List-I with List-II
\includegraphics[width=0.6\linewidth]{48.png Choose the correct answer from the options given below:

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

Hint:

To remember key viral vectors: Geminiviruses are transmitted by whiteflies, Potyviruses by aphids, Badnaviruses by mealybugs, and Tospoviruses by thrips.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Plant viruses lack active dissemination mechanisms and rely on biological vectors, such as insects, mites, or nematodes, to transmit them from infected plants to healthy hosts.
Each group of plant viruses typically exhibits a highly specific relationship with its insect vector.

Step 2: Detailed Explanation:
Let us analyze the virus families and their corresponding vectors:
- Geminiviruses:
Geminiviruses (such as Begomoviruses like Tomato yellow leaf curl virus) have circular, single-stranded DNA genomes and are transmitted by the whitefly (Bemisia tabaci) in a persistent, circulative manner.
Hence, (A) matches with (IV).
- Potyviruses:
Potyviruses represent the largest genus of plant viruses.
They are transmitted by aphids in a non-persistent, stylet-borne manner, meaning the virus is acquired and transmitted within seconds during brief probes.
Hence, (B) matches with (I).
- Badnaviruses:
Badnaviruses are bacilliform DNA viruses (such as Banana streak virus) that are primarily transmitted in a semi-persistent manner by mealybugs (family Pseudococcidae).
Hence, (C) matches with (III).
- Tospoviruses:
Tospoviruses (such as Tomato spotted wilt virus) are plant-infecting Bunyaviruses.
They are transmitted specifically by thrips (such as Frankliniella occidentalis) in a persistent, propagative manner, meaning the virus replicates inside the insect vector.
Hence, (D) matches with (II).
This matching sequence gives: (A) - (IV), (B) - (I), (C) - (III), (D) - (II).

Step 3: Final Answer:
Hence, the correct option is (A).