Question:
Which of the following plant pathogens causes gangerene in human after consumption of pathogen contaminated plant product?
Which of the following plant pathogens causes gangerene in human after consumption of pathogen contaminated plant product?
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Ergot of rye (Claviceps purpurea) contains ergot alkaloids causing gangrenous ergotism and vasoconstriction in humans.
Updated On: Sep 15, 2026
- Phytophthora infestans
- Magnaporthe oryzae
- Puccinia graminis
- Claviceps purpurea
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Ergot alkaloids produced by fungal sclerotia in infected cereals cause severe human and animal toxicoses upon ingestion.
Step 2: Detailed Explanation:
Claviceps purpurea (an Ascomycete fungus) infects rye, wheat, and pearl millet florets, replacing grain ovaries with dark, hard sclerotia (ergot bodies).
These sclerotia contain toxic indole alkaloids (ergotamine, ergometrine) that induce peripheral vasoconstriction and endothelial damage in humans, causing severe gangrene in digits and extremities (gangrenous ergotism, historically termed 'Holy Fire' or 'St. Anthony's Fire').
Step 3: Final Answer:
Hence, Claviceps purpurea causes gangrene in humans.
Ergot alkaloids produced by fungal sclerotia in infected cereals cause severe human and animal toxicoses upon ingestion.
Step 2: Detailed Explanation:
Claviceps purpurea (an Ascomycete fungus) infects rye, wheat, and pearl millet florets, replacing grain ovaries with dark, hard sclerotia (ergot bodies).
These sclerotia contain toxic indole alkaloids (ergotamine, ergometrine) that induce peripheral vasoconstriction and endothelial damage in humans, causing severe gangrene in digits and extremities (gangrenous ergotism, historically termed 'Holy Fire' or 'St. Anthony's Fire').
Step 3: Final Answer:
Hence, Claviceps purpurea causes gangrene in humans.
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