Term
| What do plant pathogens do? |
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Definition
| Injure plants (kill, affect yield, reduce growth/vigour) |
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Term
| Name some biotic plant pathogens |
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Definition
| Fungi, fungi-like oomycota, bacteria, viruses, phytoplasmas, nematodes, algae, plants |
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Term
| Why are most plants resistant to most pathogens? |
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Definition
Lack of stimulus
Constitutive and induced defences |
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Term
| How do pathogens attack plants? |
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Definition
| Recognise host, evade recognition response, evade hosts defences and inactivate them |
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Term
| Is a susceptible hose and a virulent pathogen enough for a pathogen to infect a plant? |
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Definition
| No, needs the correct environment |
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Term
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Definition
| Obtain nutrients from living cells using an haustorium (invaginates the plasma membrane) |
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Term
| What are necrotrophs? Why do biotrophs use these enzymes discretely? |
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Definition
| Cell wall degrading enzymes digest cell wall and cell components. Used discretely so as not to disrupt the integrity of the cell wall |
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Term
| What is the largest group of plant pathogens? (70-80% of agricltural plant diseases) |
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Definition
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Term
| Explain the infection process of a fungal pathogen |
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Definition
| Spore secretes a germ tube on plant lead, appressorium at end of germ tube has infection peg that goes into cell. Can infect directly, via natural openings or wounds |
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Term
| What is a hypersensitive response to plant pathogens? |
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Definition
| Localised cell death, signals for a few cells to self-destruct. Defense mechanism in resistant plants |
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