BESC 204 Practice Questions with Correct
Answers
Oomycota
-not true fungi, more closely related to algae
-kingdom stramenopila
-cellulose walls
-diploid nuclei
-coenocytic (no septa)
-sexual oospores
-asexual zoospores that have two flagella
-biochemical pathway for lysine synthesis is achieved like plants
-ultrastructure of mitochondria is like plants
Phytophthora infestans
oomycete that causes late blight of potato
-caused the potato famine
Koch's Postulates
evidence required to establish etiologic relationship between microorganism and disease
1. microorganism must be observed in every case of the disease
2. microorganism must be isolated and grown in pure culture
3. the pure culture, when inoculated in animals, must reproduce the disease
4. microorganism must be recovered from the diseased animal
Anton de Bary
, father of plant pathology
-discovered phytophthora infestans
Bordeaux Mixture
world's first fungicide
-mixture of copper sulfate and "lime"
-invention was the result of downy mildew of grape
Plasmopara viticola
oomycete that causes downy mildew of grape
Rust Fungus Life Cycle
stage 0 - spermogonia
stage 1 - aeciospores
stage 2 - urediospores
stage 3 - teliospores
stage 4 - basidiospores
Transfer spores
-aeciospores are produced on barberry and can only infect wheat
-basidiospores are produced on wheat plants and can only infect barberry
Puccinia Pathway
route stretching from northern Mexico to northern US and Canada where wheat rust spreads
Wheat Rust
Puccinia graminis
-rusty colored blotches present on stems and leaves (urediospores)
Answers
Oomycota
-not true fungi, more closely related to algae
-kingdom stramenopila
-cellulose walls
-diploid nuclei
-coenocytic (no septa)
-sexual oospores
-asexual zoospores that have two flagella
-biochemical pathway for lysine synthesis is achieved like plants
-ultrastructure of mitochondria is like plants
Phytophthora infestans
oomycete that causes late blight of potato
-caused the potato famine
Koch's Postulates
evidence required to establish etiologic relationship between microorganism and disease
1. microorganism must be observed in every case of the disease
2. microorganism must be isolated and grown in pure culture
3. the pure culture, when inoculated in animals, must reproduce the disease
4. microorganism must be recovered from the diseased animal
Anton de Bary
, father of plant pathology
-discovered phytophthora infestans
Bordeaux Mixture
world's first fungicide
-mixture of copper sulfate and "lime"
-invention was the result of downy mildew of grape
Plasmopara viticola
oomycete that causes downy mildew of grape
Rust Fungus Life Cycle
stage 0 - spermogonia
stage 1 - aeciospores
stage 2 - urediospores
stage 3 - teliospores
stage 4 - basidiospores
Transfer spores
-aeciospores are produced on barberry and can only infect wheat
-basidiospores are produced on wheat plants and can only infect barberry
Puccinia Pathway
route stretching from northern Mexico to northern US and Canada where wheat rust spreads
Wheat Rust
Puccinia graminis
-rusty colored blotches present on stems and leaves (urediospores)
