Fungal and protist diseases Flashcards
Is Rose Black Spot a fungal or protist disease?
Fungal
What plants does RBS affect?
Rose plants.
What causes RBS?
Fungus.
First 24 hours after infection: conidia (fungal spores) germinate producing a single germ tube that swells at the top forming an injection peg to penetrate the plant cuticle. The fungus grows between the plant cells and forms feeding structures (haustoria) in the plant cells stealing nutrients.
What are the symptoms of RBS?
Purple/black spots on their leaves indicating less chloroplasts so growth would slow as the plant cannot photosynthesise as well.
How does RBS spread?
Water, wind or by touch (e.g. gardeners).
How can RBS be controlled?
- Stripping the affected leaves from plants and destroying them.
- Sterilising gardening tools in between using them for different rose plants.
- Treating plants with chemical sprays/fungicides.
Is Malaria a fungal or protist disease?
Protist.
What is a protist?
A protist is a single celled organism that contains a nucleus - this makes them different to bacteria.
How is the female mosquito a vector?
Malaria is spread by female mosquitoes even though they themselves are not infected.
How does the female mosquito spread malaria?
It picks up the protist when feeding on the blood of an infected animal and then inserts it into the blood of other animals it later feeds on.
What is the scientific name for a female mosquito that spreads malaria?
The anopheles mosquito.
How do protists reproduce?
Sexually in the mosquito and asexually in the human body.
What does the female mosquito need before she lays her eggs?
She needs two meals of human blood before she can lay her eggs and this is when the protists are passed into the human blood stream.
What does malaria damage?
The liver and red blood cells.
What are the symptoms of malaria?
It can cause recurrent episodes of fever, sweats and chills, headaches, vomiting and diarrhoea due to destruction of red blood cells. Can be fatal.
