Plant Defences

Question 1

Defence against herbivores

Answer 1

-produce proteinase proteins: makes itself taste bad and can be detected by animals

Question 2

Attraction of parasitoids

Answer 2

-caterpillar salvia (volicitin) induces damaged leaves to produce pheromones that attract predators of caterpillars

Question 3

Allelopathy

Answer 3

• allelochemicals: a substance that modifies species
• secondary metabolites: response to herbivore feeding
• phenolics/tannins: bind to digestive enzymes, secrete toxins
• glycosides: interfere with production of ATP
• alkaloids: nicotine, caffeine, morphine

Question 4

Pathogens

Answer 4

• epidermis: first defence
• virulent: the plant has no defences against sickness
• avirulent: infects host without damaging plant