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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Functions of the exocyst complex in secretion and cell wall biogenesis
 Vukašinović, Nemanja ; Synek, Lukáš (advisor) ; Růžička, Kamil (referee) ; Kost, Benedikt (referee)
The mechanical strength of plant tissues and organs can be attributed to specific properties of the cell wall. In many cases, in order to establish their final shape, cells deposit various cell wall materials in a localized manner. This is achieved by highly organized action of the endomembrane system which is essential for biosynthesis and secretion of cell wall proteins and polysaccharides. The exocyst complex is a conserved tethering complex in eukaryotes and it is involved in tethering of secretory vesicles to the sites of secretion at the plasma membrane. In this study, we address several aspects of the plant exocyst complex architecture and cell wall development using molecular biology techniques and advanced confocal microscopy. We demonstrated that two SEC10 exocyst subunits are present in Arabidopsis thaliana and share redundant functions. We also showed that the architecture of the plant exocyst complex shares several structural features with the yeast one. We demonstrated the importance of the functional EXO84b exocyst subunit for normal tracheary element development and showed that the main constituents of the secondary cell walls are deposited normally in exocyst mutants. We described a clear difference in the exocyst microtubule-independent dynamics in epidermal cells vs. cell type...
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