Plant/Fungal Diseases

Question 1

Give an example of a plant disease

Answer 1

Tobacco Mosaic Virus (TMV)
Rose black spot

Question 2

List symptoms of TMV

Answer 2

Mosaic pattern of discolouration
Wrinkled leaves

Question 3

List symptoms of Rose Black Spot

Answer 3

Black spots on leaves

Question 4

Why does the discolouration of leaves and black spots lead to a lack of photosynthesis?

Answer 4

As this damages/destroys some of the chloroplasts meaning less photosynthesis can happen

Question 5

Define crop yield

Answer 5

The mass of a crop produced

Question 6

What are the effects of less photosynthesis

Answer 6

Less glucose will be produced meaning the plant will respire less and therefore have less energy to grow, make proteins and cellulose.

Question 7

How can plant diseases be prevented

Answer 7

Fungicides
Tools + hands should be fully disinfected
Infected plants should be destroyed

Question 8

How is rose black spot spread?

Answer 8

Through spores than can be transmitted in air, water or can be carried on human hands or tools

Question 9

How is TMV spread

Answer 9

Through vectors but when in the plant it spreads through the xylem and phloem

Question 10

What are the two types of plant defences

Answer 10

Chemical
Mechanical