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 12 of 12 for “"Fluctuating light"”.
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Measuring and Comparing Quantum Yield in Two Species of Marine Diatoms Subjected to Constant and Fluctuating Light Conditions
… study was conducted to determine the effects of light fluctuations on the photosynthetic efficiency of marine phytoplankton. Two species, <em>Phaeodactylum tricornutum </em>and <em>Chaetoceros gracile </em>were grown in specialized photobioreactors on a 12-hour:12-hour light:dark cycle. The …
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Strategies to improve C4 photosynthesis, water and resource-use efficiency under different atmospheres, temperatures, and light environments
… conditions, which are not representative of the fluctuating environmental conditions typically experienced by plants in the field. In particular, for photosynthesis and photosynthetic water-use efficiency to be maintained requires that photosynthesis and stomatal conductance are co-ordinated to …
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Growth, photophysiology and photosynthesis of two marine diatoms grown under predictable intra-diel light fluctuations
… studies often neglect this and use a static light environment. Consequently, the way dynamic light environments impact growth and photophysiology of diatoms is poorly understood. To address this, several aspects of photophysiology were measured in the diatoms Thalassiosira pseudonana and …
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Characterization of natural variation in steady- and non-steady-state photosynthesis and its underlying mechanisms to improve productivity in rice (Oryza sativa)
… measurements fail to account for the constantly fluctuating light environment that is more commonly seen in agricultural field settings where steady-state conditions seldom occur. Steady-state and non-steady-state photosynthesis were characterized and compared with the aim of understanding …
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Exploring the Function of Cytochrome c6A
… to the wild-type background. Exposure to a harsh fluctuating light regime, named DISCO Light, in photomixotrophy was found to lead to a growth penalty in the absence of c6A. No other significant growth phenotypes could be observed in continuous light, continuous darkness, or milder fluctuating …
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Exploring variation in water use efficiency in barley (Hordeum vulgare L.) among wild and circadian mutant varieties, and its impact on responses to drought
… in the day than mutants under steady-state light, although dynamic responses to fluctuating light were not affected. Steady-state performance did not arise from anatomical causes, and were more likely to have a functional cause, where Bowman was sink-limited while clock mutants were …
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The Ancestry and Function of Cytochrome c6A
… has a signalling role where it could sense high light stress and convey this signal to the nucleus to affect gene expression. This study aims to provide insight into the ancestry and function of cytochrome c6A. To gain a clearer understanding of the evolutionary history of cytochrome c6A and …
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Unraveling the gene regulators and molecular mechanisms underlying the elevated CO2 response in C3 plants
… and structural carbohydrate synthesis, highlighting its role in stress management and carbon partitioning under varying [CO2] and N availability. Chapter 3 was aimed at identifying an ortholog of AtbZIP1 in soybean (Glycine max) and translating findings of Chapter 2 to soybean, an important …
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Characterising natural genetic variation in dynamic photosynthesis and photoprotection in sorghum
… protecting photosynthetic machinery from excess light energy. Improving the regulation of NPQ in leaves during dynamic light conditions has been identified as a potential route toward increasing photosynthetic efficiency in the world’s most important crops. Prior studies have revealed …
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A comparative analysis of C3 and C4 photosynthesis under dynamic light conditions
… effort. The response of plants to changes in light intensity has been identified as a source of inefficiency for photosynthesis, as in the dynamic environments of the open field, where crop canopies are subject to constantly changing light intensity, lags in photosynthetic responses can amount …
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The Evolution of Photosystem II Subunit S across the Green Lineage
Light absorbed by plants can have three different fates: it can be used to drive photosynthetic electron transport, be re-emitted as fluorescence or be dissipated as heat (non-photochemical quenching, NPQ). When light levels are too high, NPQ is an important protective process that prevents damage …
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Hydrogen peroxide from photosynthesis: Theory and experiments linking elevated atmospheric CO2 with C3 plant chemical defense
… quenching during exposure to excess light, causing more excess excitation energy to enter the photosynthetic electron transport chain than under ambient CO2. In principle, this excess of energy would have nowhere to go except directly to the reduction of oxygen, to form oxygen …