Virology

7 important questions on Virology

What are the two mechanisms of plant viral movement

1. Movement of the nucleic acid; often in complexes with the movement protein. MP modifies the plasmodesmata
2. Movement of complete virons; plasmodesmatas are modified, the tubules are removed

Name the two ways of virus transport

1. Slow cell to cell movement; slow movement because the plasmodesmata needs to be modified first
2. Fast long distance transport; through the vascular system

What is subliminal infection

Virus is in the upper epidermis but can not spread any furthur
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What is a local lesion

The virus is in the parenchyma, spreads to neighbouring cells. Plant reacts with HR

What is local infection

Virus cannot enter or exit phloem

What is systemic infection

Virus moves quickly through sieve elements to other plant parts. Transport through vascular system

What is a viroplasm

Viruses with no clear association with cellular membranes, from cytoplasmic areas with high density of viral proteins and particles where replication and assembly takes place

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