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National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
Cytoplasmic membrane and tonoplast dynamics during closing and opening of stomata
 Röder, Matěj ; Žárský, Viktor (advisor) ; Albrechtová, Jana (referee)
Stomata are epidermal structures mediating regulated contact of plant apoplast with surrounding environment via stomatal opening. Change of turgor plays crucial part in initiation of stomatal opening or closure. During stomatal movement, guard cell undergo considerable and repetitive changes in cell volume and consequently surface area over a period of minutes. Alteration in the surface of membrane must occurs due to limited stretching capability of the plasma membrane. It can be achieved through membrane invaginations and endocytosis of small vesicles. Microscopy and electrophysiology techniques have proven that both processes are happening in guard cells. These processes are controlled and managed by complex web of signal pathways in which actin and microtubular cytoskeletons, SNARE proteins, ion channels and others molecules have crucial parts. The aim of this work is to summarize current knowledge on the processes and mechanisms of these membranes surface changes and their molecular principle.
Detailed record
Functions of Exocyst Complex in the Regulation of Stomata Dynamics
 Röder, Matěj ; Žárský, Viktor (advisor) ; Burketová, Lenka (referee)
Stomata are structures in plant epidermis which regulate contact between inner and outer environment of the plant by mediating their stomatal aperture. Many inner and outer signals contribute to the ontogenesis of the stomatal pattern. Guard cells undergo significant change of volume and surface during stomatal movement. This change of surface must be compensated by intracellular trafficking of membrane material because biological membrane has limited elasticity. Most of this trafficking takes place between plasma membrane and endosomal compartments. Complex exocyst is protein complex that ensures proper targeting of secretory vesicles to their destination on the plasma membrane. Function of this complex is essential for many cellular processes that require precise targeting of secretion. Mutation in gene Exo70B1 causes different development of the stomatal pattern. Plants with mutated Exo70B1 differ in stomatal size depending on the cultivation conditions more than wild type plant. Protein EXO70B1 is also directly involved in stomatal dynamics because mutants exo70B1 have retarded stomatal opening in response to light. This direct connection can be observed on the fluorescently labeled protein EXOB1 which significantly changes its localization during stomatal movements. None of these observed phenotypes is...
Detailed record
Cytoplasmic membrane and tonoplast dynamics during closing and opening of stomata
 Röder, Matěj ; Žárský, Viktor (advisor) ; Albrechtová, Jana (referee)
Stomata are epidermal structures mediating regulated contact of plant apoplast with surrounding environment via stomatal opening. Change of turgor plays crucial part in initiation of stomatal opening or closure. During stomatal movement, guard cell undergo considerable and repetitive changes in cell volume and consequently surface area over a period of minutes. Alteration in the surface of membrane must occurs due to limited stretching capability of the plasma membrane. It can be achieved through membrane invaginations and endocytosis of small vesicles. Microscopy and electrophysiology techniques have proven that both processes are happening in guard cells. These processes are controlled and managed by complex web of signal pathways in which actin and microtubular cytoskeletons, SNARE proteins, ion channels and others molecules have crucial parts. The aim of this work is to summarize current knowledge on the processes and mechanisms of these membranes surface changes and their molecular principle.
Detailed record

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