Question

Explain the life cycle of Puccinia graminis with neat and labelled diagrams.

24 Jan 2022
Answer :
Word Count : 590

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There are five stages present in the life cycle of puccinia which are uridinial stage, talial stage, basidial stage, pycenial stage and asial stage.First three stages present in wheat plant and effect the barberry plant while the last two stages produce in the barberry plant but effect the wheat plant.

Puccinia graminis mostly effects the wheat stem causing the black stem rust.The first sign appears early in march in the form of elongated radish brown granular sori.These sori are known as uredosori.

Uridinial stage

The uredospores are one celled, two nucleus, some what globose, slightly thick walled spores.These spores formed on the stalk.The spores exert pressure on the underlying epidermis causing breakdown of the host epidermis to form uridinia and this stage is known as uridinial stage.

Dispersal of spores:-

The spores are dispersed by wind and logged on the wheat plant.

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