THALLUS ORGANIZATION IN FUNGI ~ Fab Study

Thallus organization in fungi

Basically, thallus are divided in to two types.
1. Unicellular
2. Multicellular


1. Unicellular thallus:-  

Unicellular organization occur in some fungal groups. The most widely known are the yeast. Unicellular organization can be found in several fungi with motile zoospores in their life cycles. In Kingdom Fungi only the chytrids have both sexual and asexual motile flagellar cell which are generally posterior whiplash opisthokonts.
Thallus organization in fungi, unicellular thallus
Source Wikipedia


2. Multicellular thallus:- 

Multicellular  fungi reproduce by making spores. Mold is a multicellular fungus. It consists of filaments called hyphae that can bunch together in to structure called mycelia.
Thallus organization in fungi, Multicellular thallus
Source Wikipedia

Hypha-


Fungus body made of tiny filaments called hyphae. The group of hyphae is called mycelium. Hyphae are three types.
1. Uninucleate
2. Binucleate
3. Multinucleate


Septa-


Septa are two types.

1. Simplepore-

Ex- Ascomycotina

Thallus organization in fungi,septa simplepore
Source Wikipedia


2.Dolipore-

Ex-Basidiomycotina

Thallus organization in fungi,septa dolipore
Source Wikipedia


Modification of Mycelium-

Modification of Mycelium- basically three types.
1. Plectenchyma
2. Sclerotia
3. Rhizomorphs

1.Plectenchyma-  


The Mycelium- is organised in to a compactly or loosely wooven tissue. This types of organization of Mycelium- are called plectenchyma.
This are two types.
A) Prosenchyma:- These are lossely wooven tissue, hyphae like parallel.

Modification of mycelium, prosenchymal tissue


B) Pseudoparenchyma:- These are compactly wooven tissue.
Modification of mycelium, pseudoparenchyma

2) Sclerotia:- This is hard pseudoparenchymous cell. These are resting bodies formed in some plant pathogenic fungi.
Ex:- Claviceps

Modification of mycelium, sclerotia types
Sclerotia types


3) Rhizomorphs:- These are thick brown rope like coiled structure. They resembling a fine loop of a tree.

Rhizomorphs has a central pore and rind.
Central pore is made of large thin wall elongated cells. Rind is made up of small thick wall cell with dark pigment Rhizomorphs as a apical meristem.

Modification of mycelium, Rhizomorphs types

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