Plant Disease Flashcards
How can plant diseases be detected
Stunted growth
Spots on leaves
Areas of rot
Discolouration
How can ion decencies effect plant growth
Stunted growth caused by nitrate ion deficiency . This is because nitrate ions are needed to make proteins and proteins are required for growth in the cells
Chlorosis - magnesium is needed to make chloroplasts . Therefore a lack of these magnesium ions will stunt the rate of photosynthesis.
Physical defences of the plant
Cellulose cell walls
Tough waxy cuticle on leaves
Layer of dead cells around stem
Chemical plant responses
Antibacterial chemicals
Posions to deter herbivores
Mechanical adaptions
Mimicry to trick animals
Leave fall of when touched
Thorns and hairs to deter animals
Explain Tobacco mosaic virus
It is a virus
Mosaic patterns on the leaf which effect growth of plant by interrupting photosynthesis
Explain rose black spot
A fungal disease where purple spots develop on the leaf . Effects growth as it prevents photosynthesis
Transmitted through water or wind
Use fungicides to treat it
