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- W2022771786 startingPage "1106" @default.
- W2022771786 abstract "To determine the requirements for viral proteins exiting the phloem, transgenic plants expressing green fluorescent protein (GFP) fused to the Potato virus X (PVX) triple gene block (TGB)p1 and coat protein (CP) genes were prepared. The fused genes were transgenically expressed from the companion cell (CC)-specific Commelina yellow mottle virus (CoYMV) promoter. Transgenic plants were selected for evidence of GFP fluorescence in CC and sieve elements (SE) and proteins were determined to be phloem mobile based on their ability to translocate across a graft union into nontransgenic scions. Petioles and leaves were analyzed to determine the requirements for phloem unloading of the fluorescence proteins. In petioles, fluorescence spread throughout the photosynthetic vascular cells (chlorenchyma) but did not move into the cortex, indicating a specific barrier to proteins exiting the vasculature. In leaves, fluorescence was mainly restricted to the veins. However, in virus-infected plants or leaves treated with a cocktail of proteasome inhibitors, fluorescence spread into leaf mesophyll cells. These data indicate that PVX contributes factors which enable specific unloading of cognate viral proteins and that proteolysis may play a role in limiting proteins in the phloem and surrounding chlorenchyma." @default.
- W2022771786 created "2016-06-24" @default.
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- W2022771786 creator A5035404332 @default.
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- W2022771786 date "2008-08-01" @default.
- W2022771786 modified "2023-09-27" @default.
- W2022771786 title "Phloem Unloading of <i>Potato virus X</i> Movement Proteins Is Regulated by Virus and Host Factors" @default.
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- W2022771786 doi "https://doi.org/10.1094/mpmi-21-8-1106" @default.
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- W2022771786 hasPublicationYear "2008" @default.
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