Plant Disease

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Name a common viral infection of a plant.
Tobacco mosaic virus
1 of 25
Name a common fungal infection of a plant.
Rose black spot
2 of 25
Name a plant parasite.
Mistletoe
3 of 25
Name the type of insect that commonly infects plants such as roses.
Aphids
4 of 25
Describe what aphids do to the plants they infect.
They **** the sap from the stems of the plants.
5 of 25
Name a natural predator of aphids.
Ladybirds
6 of 25
Describe the adaptation that ivy and deadly nightshade have to protect themselves from grazing herbivores.
They produce chemicals that are poisonous to the herbivores.
7 of 25
Describe the symptoms of a tobacco plant infected with the tobacco mosaic virus.
Leaves of infected plants have discoloured patterns on their leaves that resemble mosaics.
8 of 25
Describe how the tobacco mosaic virus is adapted for its function .
It can survive without a host, providing the temperature of its environment remains below about 40 °C.
9 of 25
Describe the symptoms of a plant infected with the rose black spot fungus.
Leaves turn purple or black
10 of 25
How is infection by the rose black spot fungus prevented and treated?
All infected leaves and stems are removed and burned and an antifungal chemical is sprayed on.
11 of 25
Explain the effects of an aphid infestation on a plant.
They reduce the rate at which plants grow, encourage them to wilt and make their leaves curl and discolour.
12 of 25
Why are nitrate ions needed by plants?
To make proteins
13 of 25
Why is magnesium needed by plants?
To make chlorophyll
14 of 25
Name the process by which plants absorb mineral ions from the soil and explain why they use this process.
They use active transport because these elements are found in higher concentrations in the plant than in the soil, and so need energy to move against the concentration gradient.
15 of 25
Describe an experiment in which you could use soils without key nutrients to observe deficiency diseases.
Plant five raddish seedlings (or other suitable plant) into pots of different soils that are deficient in nitrogen, potassium, magnesium and phosphorus. Plant five seedlings into a pot of soil that is not deficient, as a control and compare
16 of 25
Describe how plants might protect themselves from infection.
Cell walls thickened with cellulose, waxy cuticle, bark or woody stems
17 of 25
Explain the consequences to a plant that has discoloured leaves because of infection by the tobacco mosaic virus.
This reduces the infected plant’s ability to photosynthesise and therefore produce the glucose needed for growth.
18 of 25
Suggest why the tobacco mosaic virus is an important plant disease.
Approximately £45 billion lost each year due to this disease
19 of 25
Name the deficiency disease caused by plants not absorbing enough magnesium.
Chlorosis
20 of 25
Suggest the general symptoms that you might expect to find in a plant infected with a disease.
Stunted growth, spots on leaves or lesions on stems, areas of decay (rotting), the presence of pests
21 of 25
Suggest some ways in which gardeners might identify diseases.
By looking in books or on the internet, or by taking their infected plant to a garden centre or laboratory to help
22 of 25
Give the names of two plants that possess naturally occurring antibacterial compounds.
Mint and witch hazel
23 of 25
Name the compound in foxglove that is used to treat irregular or fast heartbeat.
Digitalis
24 of 25
Explain why the Passiflora plant has evolved to have spots on its leaves.
They look like the eggs of butterflies and so adult butterflies that are ready to lay their eggs will avoid these leaves to minimise any competition for their offspring.
25 of 25

Other cards in this set

Card 2

Front

Name a common fungal infection of a plant.

Back

Rose black spot

Card 3

Front

Name a plant parasite.

Back

Preview of the front of card 3

Card 4

Front

Name the type of insect that commonly infects plants such as roses.

Back

Preview of the front of card 4

Card 5

Front

Describe what aphids do to the plants they infect.

Back

Preview of the front of card 5
View more cards

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