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Front Plant Sci. 2013 Feb 11;4:12. doi: 10.3389/fpls.2013.00012. eCollection 2013.

The cell biology of Tobacco mosaic virus replication and movement.

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Plant Biology Division, The Samuel Roberts Noble Foundation, Inc. Ardmore, OK, USA.


Successful systemic infection of a plant by Tobacco mosaic virus (TMV) requires three processes that repeat over time: initial establishment and accumulation in invaded cells, intercellular movement, and systemic transport. Accumulation and intercellular movement of TMV necessarily involves intracellular transport by complexes containing virus and host proteins and virus RNA during a dynamic process that can be visualized. Multiple membranes appear to assist TMV accumulation, while membranes, microfilaments and microtubules appear to assist TMV movement. Here we review cell biological studies that describe TMV-membrane, -cytoskeleton, and -other host protein interactions which influence virus accumulation and movement in leaves and callus tissue. The importance of understanding the developmental phase of the infection in relationship to the observed virus-membrane or -host protein interaction is emphasized. Utilizing the latest observations of TMV-membrane and -host protein interactions within our evolving understanding of the infection ontogeny, a model for TMV accumulation and intracellular spread in a cell biological context is provided.


membrane transport; microfilaments; microtubules; plant virus; tobamovirus; vesicle trafficking

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