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- W2016079479 abstract "Organelle interactions, although essential for both anabolic and catabolic pathways in plant cells have not been examined in detail so far. In the present study the structure of different organelle–organelle, organelle–vesicle and organelle–membrane interactions were investigated in growing and nongrowing cells of the green alga Micrasterias denticulata by use of high pressure freeze fixation and energy filtering transmission electron microscopy. It became clear that contacts between mitochondria always occur by formation of a cone-shaped protuberance of one of the mitochondria which penetrates into its fusion partner. In the same way, structural interactions between mitochondria and mucilage vesicles and between microbodies and mucilage vesicles are achieved. Lytic compartments contact mitochondria or mucilage vesicles again by forming protuberances and by extending their contents into the respective compartment. Detached portions of mitochondria are found inside lytic compartments as a consequence of such interactions. Mitochondria found in contact with the plasma membrane reveal structural disintegration. Our study shows that interactions of organelles and vesicles are frequent events in Micrasterias cells of different ages. The interactive contacts between lytic compartments and organelles or vesicles suggest a degradation pathway different from autophagy processes described in the literature. Both the interactions between vesicles and organelles and the degradation pathways occur independently from cytoskeleton function as demonstrated by use of cytochalasin D and the microtubule inhibitor amiprophos-methyl." @default.
- W2016079479 created "2016-06-24" @default.
- W2016079479 creator A5018234410 @default.
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- W2016079479 date "2005-08-01" @default.
- W2016079479 modified "2023-09-23" @default.
- W2016079479 title "Organelle interactions and possible degradation pathways visualized in high-pressure frozen algal cells" @default.
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- W2016079479 doi "https://doi.org/10.1111/j.1365-2818.2005.01496.x" @default.
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