Reproduction in fungi including cell cycle

1. REPRODUCTION IN FUNGI
INCLUDING CELL CYCLE
Chapter # 05
AmjadKhan Afridi
Lecturer,
Departmentof Health& BiologicalSciences

2. Fungi can reproduce either
sexually or asexually.
Reproductive structures of fungi
that produce gametes are called
gametangia, and those that
produce asexual spores are
sporangia.
Fungal spores are nonmotile and
are typically very tiny and dry.

3. Spores which explode from a sporangium may
travel up to two meters from their origin, a huge
distance considering their tiny size.
Other spores are slimy and are dispersed by
adhering to the bodies of arthropods, such as
insects.

4. Asexual Reproduction
Many fungi can reproduce asexually
Many fungi that can reproduce
asexually
Grow as mold, sometimes on fruit,
bread, and other foods
2.5 m
Penicillium
(common
saprobe on
food)
Conidia
(asexual)

5. Different modes of reproduction in fungi
Mainly there are three types of reproduction in
fungi such as
1.Vegetative Reproduction
2.Asexual Reproduction
3.Sexual Reproduction

6. The vegetative reproduction of fungi is accomplished in
four distinct modes such as;
1.Binary Fission
2.Budding
3.Fragmentation
4.Spore formation (asexual reproduction)
Vegetative Reproduction of Fungi

7. 1. Budding
The parent cell produces one or more projections called buds,
which later develop necessary structures and separated to grow
into new individuals.
Budding is common in unicellular forms like yeast.

9. 2. Binary Fission
In this process, the parent cell splits into two equal halves,
each of which develop into a new individual.
Fission is also common in yeast.
Saccharomyces pobbe and Psygosaccharomyces reproduced by
binary fission method.

10. 3. Fragmentation of hyphae (mold)
In this process, the mycelium (hyphae) of fungi
are breaks into two or more similar fragments
either accidentally or due to some external force.
Each fragment grows into a new mycelium
(daughter cell).

11. 4. Sexual spores
Spores are produced by mitosis and
cell division, formed on the ends of
aerial hyphae (not endospores:
reproductive) -germinate to form
exact clones of the Parent.
Asexual spores are different in
color, size and shape most of them
are small or big.

12. Spores may be yellow, pink, unicellular or
multicellular therefore fungi taxonomists
depend on asexual spore for classification of
fungi.
The fungal spores always result from mitosis
and hence are described as mitospores.
Following are the types of spores produced
in different groups of fungi:

13. 1-Zoospores
They are flagellated, motile
spores produced inside
structures called zoosporangia.
These spores do not have a cell
wall.
Such spores are produced in
lower fungi such as water
molds.

14. 2. Sporangiospores
These are the single-celled, produced inside structures called sporangia
in fungi such as Rhizopus (bread mold ).
There are two types of sporangiospores as motile and nonmotile.
The motile spores contain flagella such as Zoospores.
The nonmotile spores lack flagella such as
aplanospores. Example: Rhizopus.
These spores are dispersed by wind.

15. 3-Conidia
These are non-motile asexual unit produced singly or in
chains at the tip of the hypha branches that are called
conidiophores.
Such conidia are produced in fungi like Aspergillus and
Penicillium.

17. Thank You
13
th
April,
2021