Question

Give an account of the thallus and cell organization in fungi?

Answer 1

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==> In some unicellular thallus ,,fungi, thallus is more or less spherical and bears single celled structure DNA, while in the time of reproduction ,, it is the,,i.e, thallus becomes the unit of reproduction..these type of fungi are referred as $\huge{HOLOCARPIC}$

==> while in case of filamentous fungi, that originates from the germination of spores , as the spore germinates, where it gets developed and attaches to the substratum with the help of HYPHAE,, and consists of stalk and and gills..

==>$\huge{CELLLULAR\: ORGANISATION}$

==> fungal cell wall is made up of polysaccharides called CHITIN, and are rigid enough..

==> Fungi are usually uni, multicellular asual as DIMORPHIC..

==>ERGOSTEROL, is the steroid molecule that's found in cell wall or membrane that replaces cholesterol..

==> In the vegetative state The fungi consists of tangled slender, thread like STRUCTURE called HYPHAE.

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Answer 2

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The plant body of true fungi is Thallus.

It may be mycelial or non-mycelial.

The non-mycelial forms are unicellular, however , they may formed pseudomycelium.

The mycelium may be septate and aseptate.

The non-septate and multinucleated mycelium is called coenocytic.

In lower fungi the mycelium is non-septate.
e.g.,
Phycomycetes.

In higher fungi it is septate .
e.g.,
Ascomycetes,
Basidiomycetes,
Deuteromycetes (imperfect fungi).

In some forms the plant body is unicelled at one stage and mycelial at the other.

Their Organization is sometimes described as DIMORPHIC.

When the entire mycelium is converted into reproductive structure , the Thallus is
described as HOLOCARPIC.

However, when a part becomes reproductive structure then it's called EUCARPIC.

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