Page 86 - MNU microbiology theoritical 2025

General Microbiology & Immunology (PM 401) Second level Semester 4 2024/2025

D- Conidiospores

Spores arranged in chains at the end of a conidiophore such as

Penicillium

E- Blastospores

Spores formed from buds of the parent cell such spores found in
yeasts

2- Sexual Spores

• Among fungi, sexual spore results from sexual reproduction of three phases:

(1) A haploid nucleus of a donor cell (+) penetrates the

cytoplasm of a recipient cell (-).

(2) The (+) & (-) nuclei fuse to form a diploid, zygote nucleus.

(3) By meiosis, the diploid nucleus gives rise to haploid nuclei

(sexual spores).

◼ The union of the cytoplasm of two parent mycelia is known

as plasmogamy .

◼ The union of two haploid nuclei contributed by two parents is known as

karyogamy.

A- Zygospores

B- Results from fusion of two similar cells phylum
Zygomycota

General Microbiology & Immunology (PM 401) theoretical handbook Page 75