BASIDIOMYCETES

FAMILAMENTOUS UNI- OR MULTINUCLEATE HYPHAE

FORM BASIDIOSPORES ON BASIDIA

A BASIDIUM IS A HYPHAL SWELLING THAT

BEARS SPORES ON PEGS

THE BASIDIA ARE HELD IN BASIDIOCARPS (MUSHROOMS, BRACKET FUNGI, PUFFBALLS, EARTHSTARS, BIRDíS NEST FUNGI)

RUSTS AND SMUTS DONíT FORM BASIDIOCARPS

BASIDIOMYCETE LIFE CYCLE

1. UNINUCLEATE HYPHAE OF DIFFERENT MATING

STRAINS TOUCH AND A DIKARYOTIC HYPHAE

FORMS

2. A CLAMP CONNECTION FORMS BETWEEN THE

HYPHAE

3. THE NUCLEI DIVIDE AND A YOU END UP WITH

TWO OF EACH TYPE OF NUCLEI

4. A WALL DEVELOPS BETWEEN THE TWO SETS OF

NUCLEI

5. DIKARYOTIC HYPHAE GROW AND FORM A

COMPACT MYCELIUM THAT DEVELOPS INTO A

BASIDIOCARP

6. BASIDIA FORM ON GILLS

7. THE TWO NUCLEI IN THE TERMINAL HYPHAL

CELL FUSE TO FORM A DIPLOID ZYGOTE

8. ZYGOTE UNDERGOES MEIOSIS AND FOUR

HAPLOID NUCLEI MIGRATE TO PEGS

IN THE BASIDIA

9. PEGS SWELL UP TO FORM BASIDIOSPORES

ASEXUAL REPRODUCTION

FRAGMENTATION OF HYPHAE

PRODUCTION OF CONIDIA

BUDDING

PLANT DISEASES CAUSED BY BASIDIOMYCETES

SMUTS

RUST

DISEASES OF MAN

ERGOTISM

FUNGAL ECOLOGY

1. MYCORRHIZAL ASSOCIATIONS

RELATIONSHIP BETWEEN FUNGUS AND PLANT

ROOTS

MYCORRHIZAL ASSOCIATIONS

 

 

 

FUNGUS GETS CARBON FROM PLANT

PLANT GETS PHOSPHORUS FROM MYCORRHIZAE

MYCORRHIZAE ARE OF TWO TYPES:

1. ENDOMYCORRHIZAE Ė HYPHAE PENETRATE THE

PLANT

 

a. INFECT 80% OF ALL VASCULAR PLANTS

b. MOSTLY ZYGOMYCETES

c. FORM VESICLES OR ARBUSCULES

2. ECTOMYCORRHIZAE Ė HYPHAE FORM A SHEATH OR

MANTLE AROUND THE ROOT

a. MOST ARE BASIDIOMYCETES

ECONOMIC IMPORTANCE

1. SOURCES OF:

a. INDUSTRIAL CHEMICALS

b. ANTIBIOTICS

c. MEDICINES

d. vitamins

2. brewing and baking

3. USED IN PRODUCING CHEESES

4. PRODUCE GALLIC ACID USED IN,

a. photographic developer

b. dyes

c. INDELIBLE INK

5. USED TO MAKE:

a. plastics

b. TOOTHPASTE

c. SOAP

d. TOFU

FUNGAL HISTORY

PREDOMINATED IN THE LATE PERMIAN

FOSSIL RECORD SCARCE; SOME SPORES, ONE MUSHROOM IN AMBER