Plant defences

Question	Answer
12.4 Plant defences against disease	.
List all the chemical defences that plants use.	Insect repellents Insecticides Antibacterial compounds Antifungal compounds Anti-oomycetes General Toxins
Give an example of an insect repellent.	Citronella
Give an example of an insecticide.	Caffeine - Toxic to insects and fungi.
Give an example of an antibacterial compound.	Defensins - Plant proteins that disrupt the cell membrane of bacteria and fungi.
Give an example of an antifungal compound.	Chitinases - Enzyme that breaks down the chitin in the cell wall of fungi.
Give an example of an anti-oomycetes.	Glucanases - Enzymes that break down the glucans in the cell wall of oomycetes.
Give an example of a general toxin.	Cyanide - Plants have a chemical that breaks down into cyanide which is toxic to most living things.

Resource summary

	Created by Ibrahim Bangura about 8 years ago