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- W2031036232 abstract "G elidium floridanum W.R. Taylor tetraspores are units of dispersal and are responsible for substrate attachment. This study aimed to examine evidence of direct interaction between germ tube formation and G olgi activity during tetraspore germination of G . floridanum . After release, the tetraspores were incubated with brefeldin A ( BFA ) in concentrations of 4 and 8 μM over a 6 h period. The controls and treatments were analyzed with light, fluorescence ( FM 4‐64 dye) and transmission electron microscopy. In the control samples, the G olgi bodies were responsible for germ tube formation. In contrast, BFA ‐treated samples were observed to inhibit spore adhesion and germ tube formation. These tetraspores also showed an increase in volume (≥30 μm width). BFA treatment also resulted in the disassembly of G olgi cisternae and the formation of vesiculated areas of the cytoplasm, blocking the secretion of protein and amorphous matrix polysaccharides. When stained with FM 4‐64, the control samples showed fluorescence in the apical region of the germ tube, but the treated samples showed an intense fluorescence throughout the cytoplasm. From these results, we can conclude that the germ tube is formed by the incorporation of vesicles derived from G olgi. Thus, vesicle secretion and G olgi organization are basic processes and essential in adhesion and tube formation. By blocking the secretion of protein and amorphous matrix polysaccharides, BFA treatment precluded tetraspore germination." @default.
- W2031036232 created "2016-06-24" @default.
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- W2031036232 date "2014-05-06" @default.
- W2031036232 modified "2023-10-06" @default.
- W2031036232 title "Effects of brefeldin A on the endomembrane system and germ tube formation of the tetraspore of <i>Gelidium floridanum</i> (Rhodophyta, Florideophyceae)" @default.
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- W2031036232 doi "https://doi.org/10.1111/jpy.12187" @default.
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