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Author Spotlight: Microscopic Analysis of Protein Localization at Plasmodesmata in Plants
Published on: November 1, 2024
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Membrane-associated virus replication complexes locate to plant conducting tubes
Juan Wan1, Jean-François Laliberté
1a INRS-Institut Armand-Frappier ; Laval; Québec , Canada.
Plant Signaling & Behavior
|May 9, 2015
Summary
Plant viruses move cell-to-cell via plasmodesmata (PD) and vascular tissues. Our study shows membrane-bound viral replication complexes reach vascular tubes, impacting plant immunity research.
Area of Science:
- Plant virology
- Cell biology
- Plant-pathogen interactions
Background:
- Systemic plant viral infections involve cell-to-cell movement through plasmodesmata (PD).
- Viruses then enter vascular tissues (phloem and xylem) for long-distance transport.
- The mobile viral unit is thought to be a virion or ribonucleoprotein (RNP) complex.
Purpose of the Study:
- To investigate the movement of membrane-bound replication complexes during plant viral infections.
- To determine if these complexes reach vascular conducting tubes.
- To explore the implications for plant innate immunity.
Main Methods:
- Live-cell imaging techniques were employed.
- Turnip mosaic virus (TuMV) infection was studied.
- Potato virus X (PVX) was also considered.
Main Results:
- Membrane-bound replication complexes were observed moving cell-to-cell in TuMV-infected plants.
- These complexes were found to enter vascular conducting tubes (xylem vessels).
- Similar localization is suggested for Potato Virus X (PVX).
Conclusions:
- Viral replication complexes, not just virions, can move within plant vascular systems.
- The presence of viral components in xylem suggests potential apoplastic spread.
- This finding necessitates re-evaluation of plant innate immune responses to viral infections.
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