What is Telia in fungi?

Telium, plural telia, are structures produced by rust fungi as part of the reproductive cycle. They are typically yellow or orange drying to brown or black and are exclusively a mechanism for the release of teliospores which are released by wind or water to infect the alternate host in the rust life-cycle.

Are urediniospores infectious?

Urediniospores are dikaryotic, containing a pair of nuclei. They are dispersed by wind and germinate on leaf surfaces under humid conditions when the stomata are likely to be open. The infectious mycelium develops between the leaf cells and produces branches called haustoria that penetrate the host cell walls.

What is Teliospore and Uredospore?

The key difference between uredospore and teliospore is the thickness of the cell wall of each spore. Uredospores have thin spore cell walls while teliospores have thick spore cell walls. Spores are reproductive structures of fungi.

Which fungi is a macrocyclic fungi?

Rust Fungi
Rust fungi are macrocyclic when their life cycle includes five spore states that are often designated by Roman numerals: spermatia (0), aeciospores (I), urediniospores (II), teliospores (III), and basidiospores (IV).

What is the meaning of Aecia?

An aecium (plural aecia) is a specialised reproductive structure found in some plant pathogenic rust fungi that produce aeciospores. Aecia may also be referred to as “cluster cups”. The term aecidium (plural aecidia) is used interchangeably but is not preferred.

How Teliospores are formed?

Morphology. Teliospores consist of one, two or more dikaryote cells. Teliospores consist of dikaryote cells. As the teliospore cells germinate, the nuclei undergo karyogamy and thereafter meiosis, giving rise to a four-celled basidium with haploid basidiospores.

Is powdery mildew a pathogen?

Powdery mildew is a widespread plant disease caused by obligate biotrophic fungal pathogens involving species-specific interactions between host and parasite.

How is stem rust spread?

Urediniospores are the only type of spores in the rust fungus life cycle that are capable of infecting the host on which they are produced, and this is therefore referred to as the ‘repeating stage’ of the life cycle. It is the spread of urediniospores that allows infection to spread from one cereal plant to another.

Which is Heteroecious fungus?

The parasitic fungi that require two or more hosts to complete their life cycle are called Heteroecious fungi. The heteroecious rust fungi are Puccinia graminis, Puccinia coronata.

What is macrocyclic fungus?

Fungi that produce all five spores (sometimes excluding pycniospores) are termed macrocyclic. Fungi that lack pycniospores and aeciospores in their life cycle are termedmicrocyclic and always have an autoecious life cycle.

Which of the following is a Heteroecious fungus?

Answer: : Puccinia is a heteroceous fungus in the above group of funguses.