Midterm Flashcards
What are the three types of symbiosis?
- Commensalism
- Mutualism
- Parasitism
What are four examples of disease symptoms?
- Chlorosis
- Anthocyanins
- Necrosis
- Cankers
What are four examples of disease signs?
- The pathogen itself
- Reproductive structures
- Exudates from pathogen
- Gene products
What are the two types of endophytes?
Intercellular - living between cells of host plant
Intracellular - living inside plant cells
According to The Disease Triangle, a disease needs a ________ host, ________ pathogen, and _________ environment to survive
Susceptible host;
Virulent pathogen;
Conducive environment
What three materials make up fungus cell walls?
- Chitin
- Beta-glucans
- Glycoproteins
Why are fungi eukaryotes?
They have membrane-bound nuclei and organelles
How big are hyphae?
About 2-3 μm
The main plant pathogen in Sar
Oomycetes
What kind of spores are zoospores?
Mitospores, asexual
What is an obligate biotroph?
An organism that requires living plant tissue to survive
What is the difference between a saprotroph and a necrotroph?
Saprotrophs feed on already-dead plant material
Necrotrophs kill their hosts and feed on the dead plant material
What is the difference between horizontal and vertical gene transfer?
Horizontal gene transfer is between two unrelated individual bacteria
Vertical gene transfer is passed from parent to offspring
Flagella on fungi and oomycetes are ____________
Bacteria
