Question

Puccinia produces :

• A. Uredia and pycia on Barberry leaves.
• B. Uredia and aecia on Barberry leaves.
• C. Uredia and aecia on Wheat leaves.
• D. Uredia and telia on Wheat leaves.

Answer 1

The correct option is D Uredia and telia on Wheat leaves.

Puccinia monoica is a parasitic rust fungus of the genus Puccinia that inhibits flowering in its host plant (usually an Arabis species) and radically transforms host morphology in order to facilitate its own sexual reproduction. All rusts are obligate parasites, meaning that they require a living host to complete their life cycle. Rusts can produce up to five spore types from corresponding fruiting body types during their life cycle, depending on the species.

• Urediniospores from Uredia (Uredinia). These serve as repeating dikaryotic vegetative spores. These spores are referred to as the repeating stage because they can cause auto-infection on the primary host, re-infecting the same host from which the spores were produced. They are often profuse, red/orange, and a prominent sign of rust disease.
  
• Teliospores from Telia. These dikaryotic spores are often the survival/overwintering stage of life cycle. Later they germinate to produce basidia.

So, the correct answer is 'Uredia and telia on Wheat leaves'