Plant Physical Defences Against Pathogens Flashcards

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What is a physical defence in plants against pathogens?

It is a body structure that forms a barrier to stop pathogens getting in or spreading.

It is a tough outer layer around each cell that many pathogens cannot push through.

It is a thin, waterproof layer that stops pathogens entering through the surface.

Bark is a thick layer of dead cells that blocks pathogens and can fall off, taking pathogens with it.

Infected leaves can drop off the plant, so the pathogens are removed from the plant’s body.

Stomata are small pores; when they close, they reduce openings where pathogens can enter.

They fit closely together to form a continuous barrier that is hard for pathogens to pass through.

They can trap or block tiny organisms and make it harder for pathogen-carrying insects to reach the surface.

Cells around the damage divide and form a thick layer that seals the wound and blocks pathogens.