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Showing 1 to 9 of 9 for “"PS II"”.
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Investigations of the water oxidation complex in PS II
In this thesis an attempt was made to take the water oxidizing complex apart in a controlled way and to reconstitute it to its functional form.
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The Structure and Function of Chlorophyll-Proteins in Photosystem I and The Light Harvesting Complex of Photosystem Ii
… these membrane-bound complexes, Photosystem I (PS I) and Photosystem II (PS II), consist in part of chlorophyll proteins. The chlorophyll-protein function to absorb incident light energy and to transfer absorbed energy to photochemical reaction centers where charge separation occurs. The …
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Bicarbonate Reversible Anionic Inhibition of the Quinone Reductase in Photosystem II
… was located on the acceptor side of photosystem II (PS II). The oxidation of Q$\sb{\rm A}\sp-$ (the primary quinone acceptor of PS II) by Q$\sb{\rm B}$ or Q$\sb{\rm B}\sp-$ (Q$\sb{\rm B}$ is the secondary quinone acceptor of PS II) exhibited a smaller overall half-time at pH 7.5 than at pH 6.5 in …
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Functional studies on the extrinsic proteins of Photosystem II
The function of the PsbO and the PsbR protein in Arabidopsis thaliana were studied. The Arabidopsis mutant psbo1 contains a point mutation in the psbO-1 gene leading to defective expression of the PsbO-1 protein. Functional studies demonstrated both the reducing-side and oxidizing-side of …
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Modifikationen am Photosystem II-Reaktionszentrum
… Methode des Pigmentaustauschs am Photosystem II Reaktionszentrum zu optimieren. Es konnten eine Reihe von Chorophyll-ähnlichen Pigmenten in das RC integriert werden. Dabei wurde ein Chlorophyll a (Chl) gegen ein [Ni2+]-Chlorophyll a (Ni-Chl), ein [3-Acetyl]-chlorophyll a (Ac-Chl) sowie ein …
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Differential inhibition of the plastoquinone reductase activity by weak organic acids and its relationship to the bicarbonate effect in spinach thylakoids
… of the electron acceptor side of photosystem II (PS II), but not of photosynthetic bacteria, has been known for a long time. In formate treated thylakoids, the (Q$\sb{\rm A}\sp-$) decays show a larger slowing down after the second and subsequent flashes than after the first flash. This …
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The Mechanism of Chloride Activation of Oxygen Evolution in Spinach Photosystem Ii
… the oxygen-evolving complex (OEC) of Photosystem II (PS II) was studied by $\sp{35}{\rm Cl}$-NMR and steady-state measurements of oxygen evolution. This study represents the first attempt to directly monitor ${\rm Cl}\sp-$ binding in spinach. At low light intensity, the ${\rm Cl}\sp-$ activation …
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The Mechanism of Bicarbonate Activation of Plastoquinone Reduction in Photosystem II of Photosynthesis
… (HCO$\sb{3}\sp{-}$) is required for photosystem II (PS II) electron transport. Depleting thylakoids of HCO$\sb{3}\sp{-}$ slows down electron transfer from the primary quinone acceptor Q$\sb{\rm A}$ to the secondary quinone acceptor Q$\sb{\rm B}$. It also blocks electron transfer from Q$\sb{\rm …
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A waterhemp saga: Seed production, genetics, hybridization, and the creation and discovery of quad-stack individuals
… after pollination, and that seed dormancy drops if seeds remain on the plant for at least 15–30 days after pollination. These findings could be helpful in future studies requiring the crossing of waterhemp, such as the study reported in Chapter 3, in which the inheritance and genetics of …