Plant Disease and Defense

Question 1

give 3 ways to identify diseases in plants

Answer 1

use a garden manual / website

take infected parts of plant to lab to identify pathogen

use testing kit that contains monoclonal antibodies

Question 2

give 5 symptoms of a plant with disease

Answer 2

spots on leaves
discolouration
malformed stems 
stunted growths
pests / bugs

Question 3

give 4 ways plants can be infected

Answer 3

viral infections

bacterial infections

fungal pathogens

insect vectors

Question 4

give an example of a viral infection for plants

Answer 4

tobacco mosaic disease

Question 5

give an example of a fungal pathogen in plants

Answer 5

rose black spot

Question 6

what do ion deficiencies in plants affect (2)

Answer 6

protein synthesis

photosynthesis

Question 7

what deficient ion affects protein synthesis

Answer 7

deficiency of nitrate ions

Question 8

what deficient ions affect photosynthesis

Answer 8

deficiency of magnesium ions

Question 9

how is a nitrate deficiency identified in plants

Answer 9

plant would look short / have stunted growth

Question 10

how is a magnesium deficiency identified in a plant

Answer 10

plants would have yellowing / discolouration of leaves

Question 11

give 4 ways micro organisms can enter plants by

Answer 11

cuts/ wounds
the environment
gardening tools
pollinators / vectors

Question 12

give 3 physical defences of plants

Answer 12

cellulose cell wall
waxy cuticle
layers of dead cells

Question 13

give 2 chemical defences of plants

Answer 13

antibacterial chemicals

poisons

Question 14

give 3 mechanical defences in plants

Answer 14

thorns/ hairs
leaves curling / dropping when touched
mimicry

Question 15

what are the 3 types of defence in plants

Answer 15

physical
chemical
mechanical