Question:
Which of the following groups of pathogen display self-motility?
Which of the following groups of pathogen display self-motility?
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Oomycete zoospores are biflagellate and self-motile in free water films, swimming chemotactically toward host plants.
Updated On: Sep 15, 2026
- True fungi
- Viruses
- Phytoplasma
- Oomycetes
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Microbial motility relies on specialized locomotory organelles like flagella.
Step 2: Detailed Explanation:
Oomycetes (kingdom Straminipila Chromista, e.g., Phytophthora, Pythium, Plasmopara) produce biflagellate asexual zoospores equipped with one anterior tinsel flagellum and one posterior whiplash flagellum, exhibiting active self-motility and chemotaxis in water films toward host root exudates.
True fungi (Eumycota, except primitive Chytridiomycota), non-cellular viruses, and wall-less phytoplasmas completely lack flagellar self-motility.
Step 3: Final Answer:
Therefore, Oomycetes display self-motility.
Microbial motility relies on specialized locomotory organelles like flagella.
Step 2: Detailed Explanation:
Oomycetes (kingdom Straminipila Chromista, e.g., Phytophthora, Pythium, Plasmopara) produce biflagellate asexual zoospores equipped with one anterior tinsel flagellum and one posterior whiplash flagellum, exhibiting active self-motility and chemotaxis in water films toward host root exudates.
True fungi (Eumycota, except primitive Chytridiomycota), non-cellular viruses, and wall-less phytoplasmas completely lack flagellar self-motility.
Step 3: Final Answer:
Therefore, Oomycetes display self-motility.
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