Summary
Mby 161 Theme 13-15 Summary
- Course
- Institution
- Book
This is a comprehensive and detailed summary on theme 13-15 of the book Microbiology for MBY 161. *Essential!! *For you!!
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
More summaries for
-
Test Bank For Microbiology: An Introduction, 13th Edition Gerard J. Tortor- 2024 Update
-
TEST BANK OF MICROBIOLOGY An Introduction 13th Edition by Tortora
-
Test Bank - Microbiology: An Introduction, 14th Edition (Tortora, 2024), Chapter 1-28 | All Chapters
Seller
Follow
anyiamgeorge19
Reviews received
Content preview
MBY THEME 13,14,15FUNGI, ALGAE AND PROTOZOA
FUNGI
• Mycology- the study of fungi
• They are Chemoheterotrophs
• An organism that uses organic chemical substances as a source of carbon and
energy
• Characteristics
• Vegetative structures of fungi
1. Molds and fleshy fungi
• Thallus body consist of hyphae ( filaments)
• Collection of hyphae is called a mycelium
a. Septate hyphae- contain cross-walls
b. Coenocytic hyphae- no septa
• Hyphae grow by elongating from the tip
• Vegetative hyphae obtain nutrients while aerial hyphae are involved with
reproduction
2. Yeasts
• Non-filamentous and unicellular
• Budding yeasts divide unevenly ( Saccharomyces cerevisiae)
• Fission yeasts divide evenly (Schizosaccharomyces pombe)
3. Dimorphic fungi
• One fungus can grow as a yeast or a mold, especially human pathogens
• Yeast phase triggered by environmental conditions
• Life cycle
• Reproduction can be sexual or asexual
• Reproduce by means of spores
o One fungal species can reproduce sexually and/or asexually and can have
several different spore types
o Different fungal groups have different spore types
o Spore types and forms were used until recently to classify fungi
• Asexual reproduction/spores
o Produced by mitosis and subsequent cell division
o No fusion of nuclei or genetic exchange
o Daughter cells genetically identical of the mother cells
o Asexual spores give rise to mycelium/colony that are genetically identical
to the parent spore
o Conidia- produced in a chain from a conidiophore and not enclosed in a
sac
o Arthroconidia: fragmentation of septate hyphae
o Ballistoconidia: buds of the parent cell
, MBY THEME 13,14,15
o Chlamydospore: spore within a hyphal segment
o Sporangiospores: enclosed in a sac
• Sexual reproduction/spores
o Produced fusion of nuclei of two opposite mating types
o Each spore differs genetically from other and parents
o Three phases of sexual reproduction:
1. Plasmogamy- cytoplasm of two parent cells fuse bringing together 2
haploid nuclei in the same cell
2. Karyogamy- the nuclei fuse and form diploid nucleus
3. Meiosis- diploid nucleus produce haploid nuclei (sexual spores)
o Zygomycota =Sexual spores – Zygospores
o Asexual spores- sporangiospores
o Dikaryomycota (separate hyphae)
1. Basidiomycota ( sexual spores are basidiospores; carries outside on
basidia)
• “club fungi” because sexual spores are produced externally on a structure called
the basidium, most often formed on a basidiocarp
2. Ascomycota ( sexual spores are ascospores; carried inside a sac)
• “sac fungi” because sexual spores ( ascospores) are produced in sac-like structure
called the ascus ( plural=asci)
• Reproduction – asexual = conidia
Sexual= Ascospores
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller anyiamgeorge19. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.50. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79079 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now