Physical plant defences Flashcards
1
Q
Cellulose cell wall
A
A physical barrier and contains chemical defences which activate when a pathogen is detected
2
Q
Lignin
A
Waterproof and indigestible
3
Q
Waxy cuticles
A
Prevent water collected on the surface of leaf cells (pathogens cannot survive as a result).
4
Q
Bark
A
Contain chemical defences
5
Q
Stomatal closure
A
Guard cells close stomata, preventing pathogens entry
6
Q
Callose
A
A large polysaccharide that is deposited around the sieve plates and blocks the flow in the sieve tube.
7
Q
Tylose
A
Swelling that fills the xylem vessel preventing it carrying water
