Which of the following belong to Oomycetes
Show Hint
Remember that Downy Mildews are generally Oomycetes, while Powdery Mildews are Ascomycetes.
- Pestalotia
- Phyllosticta
- Plasmopara
- Puccinia
The Correct Option is C
Solution and Explanation
The question asks to identify a pathogen belonging to the Oomycetes, a group of "water molds" that were formerly classified as fungi but are now grouped with heterokonts/chromists.
Step 2: Detailed Explanation:
• Plasmopara (C): Specifically, Plasmopara viticola causes the Downy Mildew of grapes. Oomycetes are characterized by coenocytic (non-septate) hyphae, cell walls made of cellulose (not chitin), and the production of biflagellate zoospores. This perfectly describes Plasmopara.
• Puccinia (D): This is the genus of Rust fungi. They are true fungi belonging to the Phylum Basidiomycota. They produce septate hyphae and chitinous cell walls.
• Pestalotia (A) and Phyllosticta (B): These are genera of imperfect fungi (Deuteromycetes) that are generally classified within the Ascomycota. They produce asexual spores in specialized structures (acervuli or pycnidia) and have septate hyphae.
Final Answer:
Among the given options, only Plasmopara is a member of the Oomycota.
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