plant diseases

Question 1

plant physical barriers

Answer 1

• leaves
• stem
• waxy cuticle
• cell walls (cellulose)

Question 2

plant chemical barriers

Answer 2

-antiseptics which kill bacterial and fungal pathogens and deter pests

Question 3

2 chemicals from plants that humans use

Answer 3

1) Quinine from the bark of the cinchona tree treats malaria

2) aspirin found in bark and leaves of willow trees is used to treat pain and fever

Question 4

plant symptoms of disease (how you can tell)

Answer 4

• galls -abnormal growths
• nutrient deficiency- yellow/curling leaves
• patches of diseased plant scan suggest the disease is spread through the soil and random distribution suggests airborne
• lab testing

Question 5

detecting antigens

Answer 5

antigens from a particular pathogen will be present in a plant infected with that pathogen and can be detected in a sample of plant tissue

Question 6

detecting dna

Answer 6

if the plant is infected the pathogens dna will be present in the plants tissues and these can be detected from tests