Infection & Response: Plant Diseases and Defences Flashcards
1
Q
What are some mechanical defences of plants?
A
- thorns and hairs (deter herbivores)
- mimicking other organisms (deters other organisms)
- drooping or curling leaves (knocks off insects)
2
Q
What are some chemical defences of plants?
A
- produce antibacterial chemicals (kill bacteria)
- poisons (deter herbivores)
3
Q
What are some physical defences of plants?
A
- waxy cuticle (barrier to pathogens)
- cells surrounded by cell walls (barrier to pathogens)
- layers of dead cells around stems (barrier to pathogens
4
Q
List the 5 uses of glucose.
A
- stored as oils or fats
- respiration
- making cellulose
- making amino acids (combined with nitrates) which then make proteins
- stored as starch
5
Q
Why do plants need nitrates?
A
Plants need nitrates to make proteins which are needed for growth.
6
Q
Why do plants need magnesium ions?
A
Plants need magnesium ions to make chlorophyll which is needed for photosynthesis.
7
Q
What are the symptoms for nitrate deficiency?
A
stunted growth
8
Q
What are the symptoms for magnesium deficiency?
A
- chlorosis
- yellow leaves
