Fungi The Thallus Organisation. Rhizomorph, Appresorium, Hastoria & Traps Watch my Video on YouTube 🔗https://youtu.be/BI6MYRJNzZo?si=lqzlrMdTFbVep7Tq

1. Hamid Ahmad Malik
M.Sc.( Agri. ) Plant Pathology, SKUAST-K, Shalimar
Fungi : The Thallus
Organisation

2. Contents
 Thallus & it’s classification
 Mycelium & it’s classification
 Septa
Dolipore septum
 Fungal tissue
 Modification of hyphal structure
a) Rhizomorph
b) Appressorium
c) Haustorim
d) Traps

3. Thallus:- Vegetative body/ Fungal body
Thallus
Unicellular
Thallus
Filamentous
Thallus
Eg., Chytrids,
Synchytrium,
Eg., Alternaria,
Pythium
Classification of thallus, Based on number of cells

4. Thallus
Thallus
Eucarpic Holocarpic
Eg., Pythium Eg., Synchytrium
Based on reproductive structures

5. Mycelium:- Network/ Aggregation of Hyphae
Mycelium
Septate Coenocytic
Eg., Oomycetes &
Zygomycetes
Eg., Ascomycetes,
Basidiomycetes &
Deteriomycetes
Classification of mycelium based on septa.

6. Mycellium
Mycellium
Homokaryotic Heterokaryotic
Classification of mycelium based on nucleus.

7. Septa
Septa
Primary Adventious

8. Electron Microscope Studies of Septum
Septum
Simple
Poroid
Disc
Dolipore
Septum
Eg., Ascomycetes Eg., Basidiomycetes

9. Dolipore septum
Parenthosome

10. Plectenchyma
Fungal tissues

11. Modification Of Hyphal Structures
Rhizomorph Appresorium
Haustoria Traps
Hyphae

12. Rhizomorph
• Rhizomorph (Gr. rhiza=root +
morphe = shape)
• The growing tip of rhizomorph
resembles that of a root tip.

13. Appresorium
• Appresorium (L. apprimere = to press
against)
• It helps germ tube or hypha to attach
to the surface of the host or
substrates.

14. Haustoria
• Haustoria ( L. haustor =
drinker)
• Special hyphal structures
or outgrowths of somatic
hyphae sent into the cell to
absorb nutrients.

15. Traps
• Modification of
hyphae in predacious
fungi for capture of
small animals,
protozoa, rotifers &
nematodes.
Some Belong to Zygomycetes
Most Belong to
Fungi
Imperfecti

16. Two Types OF Traps
• .

17. Thank You