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Helper component-transcomplementation in the vector transmission of plant viruse
Phytopathology
|October 24, 2008
Summary
Plant viruses use two main strategies for vector transmission. A novel concept, helper component (HC)-transcomplementation, explains how HC aids virus transmission beyond direct interaction, impacting virus evolution.
Area of Science:
- Plant virology
- Molecular biology
- Insect-vector interactions
Background:
- Noncirculative plant virus transmission relies on vectors, with viruses retained in vector mouthparts or anterior gut.
- Two strategies exist: capsid strategy (direct coat interaction) and helper strategy (requiring helper component, HC).
Purpose of the Study:
- To propose an extended definition of helper component (HC).
- To introduce and emphasize the concept of HC-transcomplementation in plant virus transmission.
Main Methods:
- Review of existing literature on plant virus-vector interactions.
- Conceptual analysis of the helper strategy in noncirculative transmission.
Main Results:
- The helper strategy involves a nonstructural protein, helper component (HC).
- HC and virus particles can be acquired sequentially by the vector.
- HC-transcomplementation, where acquired HC assists subsequent virus transmission, is proposed.
Conclusions:
- HC-transcomplementation extends the understanding of the helper strategy.
- This concept distinguishes helper strategy transmission and may influence virus population genetics and evolution.
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