BNTY 301 Week 10

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Author:
Anonymous
ID:
209240
Filename:
BNTY 301 Week 10
Updated:
2013-03-24 15:52:08
Tags:
Plant Pathology lecture
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Lecture Notes
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  1. Virus Symptoms
    • Chlorosis
    • Stunting and malformation
    • Yield reduciton
    • Usually not death of plant
    • Rugosity- ruffled
    • Color breaking (tulips)
  2. Life cycle of Virus
    • 1. entry: wounds needed
    • 2. Release nucleic acid
    • 3. Protein Synthesis: use host machinery
    • 4. Nucleic acid replicaiton
    • 5. Virus assembly: encapsulate D/RNA
    • 6. Cell to cell movement through plasmodesmata (not disease if in only one cell)
    • 7. Systemic movement through phloem: need capsid coat protein, passive movement
  3. Spread of viruses
    • mechanical
    • vegetative propagation
    • infected seeds and pollen
    • nematodes
    • fungus vector
    • insects  (non-persistent, quick to pick up, transmit, and lose)
    • aphids (persistent, long time to get pick up and transmit)
    • white flies
    • thrips (tomato)
  4. Vector
    • Organism
    • Transmits virus from diseased plant to healthy plant
    • has a specific association with the virus it transmits

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