Plant disease and defences Flashcards
(6 cards)
1
Q
What does lack of nitrates cause
A
Stunted growth
2
Q
What does lack of magnesium ions cause
A
Chlorosis
Yellow leaves
3
Q
Symptoms of disease in plants
A
Stunted growth
Spots on leave
Patches of decay
Abnormal growth
Malformed stems or leaves
dicolouration
4
Q
Physical plant defences
A
Waxy cuticle
Cell walls
Layers of dead cells around the stems
5
Q
Chemical plant defences
A
Antibacterial defences (mint or witch hazel)
Contain poisons
6
Q
Mechanical plant defences
A
Thorns and hairs
Leaves that droop
Mimic other organisms (appear to be stones and pebbles)
