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- W2148808636 abstract "Summary Plant cells show myosin‐driven organelle movement, called cytoplasmic streaming. Soluble molecules, such as metabolites do not move with motor proteins but by diffusion. However, is all of this streaming active motor‐driven organelle transport? Our recent simulation study ( Houtman et al. , 2007 ) shows that active transport of organelles gives rise to a drag in the cytosol, setting up a hydrodynamic flow, which contributes to a fast distribution of proteins and nutrients in plant cells. Here, we show experimentally that actively transported organelles produce hydrodynamic flow that significantly contributes to the movement of the molecules in the cytosol. We have used fluorescence recovery after photobleaching and show that in tobacco Bright Yellow 2 (BY‐2) suspension cells constitutively expressing cytoplasmic green fluorescent protein (GFP), free GFP molecules move faster in cells with active transport of organelles than in cells where this transport has been inhibited with the general myosin inhibitor BDM (2,3‐butanedione monoxime). Furthermore, we show that the direction of the GFP movement in the cells with active transport is the same as that of the organelle movement and that the speed of the GFP in the cytosol is proportional to the speed of the organelle movement. In large BY‐2 cells with fast cytoplasmic streaming, a GFP molecule reaches the other side of the cell approximately in the similar time frame (about 16 s) as in small BY‐2 cells that have slow cytoplasmic streaming. With this, we suggest that hydrodynamic flow is important for efficient transport of cytosolic molecules in large cells. Hydrodynamic flow might also contribute to the movement of larger structures than molecules in the cytoplasm. We show that synthetic lipid (DOPG) vesicles and ‘stealth’ vesicles with PEG phospholipids moved in the cytoplasm." @default.
- W2148808636 created "2016-06-24" @default.
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- W2148808636 date "2008-07-31" @default.
- W2148808636 modified "2023-09-27" @default.
- W2148808636 title "Hydrodynamic flow in the cytoplasm of plant cells" @default.
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- W2148808636 doi "https://doi.org/10.1111/j.1365-2818.2008.02033.x" @default.
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