Number of spore stages in Puccinia is

Five

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Four

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Three

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Two

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Solution

The correct option is A Five
Puccinia graminis is macrocyclic, producing all five spore stages: basidiospores, pycniospores (spermatia), aeciospores, urediniospores (uredospores), and teliospores. Although stem rust is caused by a single species of fungus, Puccinia graminis, there is considerable genetic variation within the species.
Hence the correct answer is option A.

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