Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 30 for “"PHOTOSYNTHETIC ELECTRON TRANSPORT"”.
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Photosynthetic electron transport in cyanobacteria
… cyanobacteria and prochlorophytes have a similar photosynthetic apparatus. The light-driven reactions take place in the thylakoid membranes and three major membrane-intrinsic protein complexes carry out photosynthetic electron transfer, photosystem II, the cytochrome bf complex and photosystem I. …
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Investigating Cytochromes in Photosynthetic Electron Transport in Cyanobacteria
Inhibitor binding sites in the cytochrome bf complex of Synechococcus 7002 was modified by site-directed mutagenesis. The aim of this study was to identify the amino acid residues in cytochrome b6 that participate in plastoquinol and inhibitor binding at the plastoquinol oxidation site of the …
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The Effect of Chilling Temperatures on Photosynthetic Electron Transport and Electron Transport Components in Tomato Plants
Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs
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Interactions of paraquat and nitrodiphenylether herbicides with the chloroplast photosynthetic electron transport in the activation of toxic oxygen species
… examined for their patterns of inhibition of the photosynthetic electron transport (PET) system. Serum from RS2 was greatly hemolyzed. Fifty ul of RS1 serum were required for 100% inhibition of a H₂O → methylviologen(MV)/O₂ reaction, whereas only 10 µl of a 1:10 dilution of RS2 were needed for …
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The Structure and Function of Chlorophyll-Proteins in Photosystem I and The Light Harvesting Complex of Photosystem Ii
… units of chloroplast membranes which mediate photosynthetic electron transport from water to NADP are structurally organized into integral complexes. Two of these membrane-bound complexes, Photosystem I (PS I) and Photosystem II (PS II), consist in part of chlorophyll proteins. The …
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Comparative studies on the modes of action of SC-0224 and glyphosate
… pathway. The effects of these herbicides on photosynthetic electron transport (the Hill reaction) was determined using isolated thylakoids from Alaska pea (Pisum sativum L.). The action of SC-0224 was compared with the action of glyphosate, TMS-I and diuron …
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Investigation of mRNA Expression of Early Light Inducible Protein (ELIP) under High Light Stress <em>Arabidopsis thaliana</em>.
… is that redox status of the chloroplast photosynthetic electron transport Chain (PETC) and/or chlororespiration may induce <em>ELIP</em> expression. Using the <em>Arabidopsis thaliana immutans (im)</em> chlororespiratory mutant, this hypothesis was tested. Etiolated seedlings of this …
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Genetic relatedness of the family Rhodospirillaceae: Genome plasticity, chromosome heterogeneity, and chalcogenic oxyanion reductase activity in Rhodobacter sphaeroides
… pathway and the presence of a functional photosynthetic electron transport chain to effect HLR to TeO$\sb3\sp{2-}$-class oxyanions under photosynthetic growth, and functional cytochromes $b,\ c\sb1$ and $c\sb2$ to facilitate HLR under aerobic growth conditions."
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Regulation of the chloroplast light harvesting antenna by plastoquinone redox: Modulation of chlorophyll metabolism and thylakoid complex organization
… deal of interest in the possibility of modifying photosynthetic parameters to improve photosynthesis, specifically with the aim of increasing crop yields for food and biofuels. Photoinhibition, the reduction of photosynthetic electron transport in the face of excess irradiance, is thought to …
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Interaction between respiratory carbon flow and photosynthetic light harvesting in the green alga, selenastrum minutum
… a state 1 to 2 transition which could poise the photosynthetic electron transport chain for a decrease in NADPH production. The purpose of the present study was to rigorously test the hypothesis that increased respiratory carbon flow, which increased reduced/oxidized pyridine nucleotide ratios, …
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The Role Of The DOMAIN OF UNKNOWN FUNCTION (DUF2358) In Sugar Signalling Pathways In Arabidopsis thaliana
… condition. However, under starvation conditions photosynthetic electron transport was affected. At the molecular level, ABA signalling pathways are induced in the knockout plants, which may be modulated through the interaction with CLPC1 and downstream induction of ABF4 and ABF1 expression. We …
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The role of glycogen Metabolism in the Adaptation to environmental Changes of the cyanobacterium Synechocystis sp. PCC 6803
… changes, enhancing the resilience of this model photosynthetic organism. By examining phosphohexomutases, that interchange the phosphate of glucoses, the work identifies the sll0726 as the main phosphoglucomutase. Cellular fitness is compromised under conditions that demand higher flux towards …
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Photosynthetic adaptations in grasses to abnormal levels of soil cations
… were examined using a range of monitors of photosynthetic reactions including fluorescence, oxygen evolution and light—induced electron transport. Techniques involving the measurement of steady state emission fluorescence spectra of excised leaves were standardised and applied. The soil …
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Manipulating Guard Cell Anatomy and Physiology Using Biotechnological Approaches to Understanding Impact on Crop Performance
… atmosphere and therefore have great control on photosynthetic processes and water loss from the plant. The number and patterning of stomata on a leaf are determined by a developmental pathway involving the epidermal patterning factor (EPF) protein family. Several EPF members affect epidermal …
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Role of xanthophyll and water-water cycles in the protection of photosynthetic apparatus in Arbutus unedo and Arabidopsis thaliana
Photosynthetic organisms have sought out the delicate balance between efficient light harvesting under limited irradiance and regulated energy dissipation under excess irradiance. One of the protective mechanisms is the thermal energy dissipation through the xanthophyll cycle that may transform …
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Characterization of cytochromes and plastocyanin in the cyanobacterium Synechocystis sp. PCC 6803
… project is to study the components involved in electron transport between the cytochrome bf complex and photosystem I in the unicellular cyanobacterium Synechocystis 6803. Two soluble proteins, the heme-protein cytochrome c553 and the copper protein plastocyanin, were isolated from this species …
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Photoprotective role of beta -carotene and antioxidant enzymes: A shield against ultraviolet damage in Dunaliella bardawil
<p>Photosynthetic and antioxidant responses following exposure to an array of irradiances and frequencies were examined and contrasted in two species of the unicellular green alga Dunaliella. Species selection was based on the ability of Dunaliella bardawil (UTEX 2538) to accumulate massive …
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Investigation of the Physiology of Hydrogen Production in the Green Alga Chlamydomonas reinhardtii Using Spectral-Selective Photosystem I Light
… production systems. The PSI-light method allows electrons to pass through the photosynthetic electron transport chain while reducing radiation available for photosynthetic oxygen evolution that inactivates hydrogenase. Exploring the physiology of photohydrogen production using the PSI-light …
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Studies on the Nature of Triazine Resistance in Weeds
… rate. Various photosystem I and II partial electron transport reactions were conducted in isolated chloroplasts of susceptible and resistant smooth pigweed. Whole chain electron transport rates were the same for chloroplasts from the two biotypes and were high enough to account for in vivo …
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Electrochemical and genetic tools for analysing and engineering bioenergetic processes in cyanobacteria
… of Earth’s ecosystems. It is catalysed by photosynthetic electron transport chains: a collection of free and proteinbound redox cofactors found within the specialised thylakoid membranes of photosynthetic organisms. Cyanobacteria, to our knowledge, are the first organisms to have evolved …
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