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 “"Photoinhibition"”.
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Impact of Air Quality on Lichen Net Carbon Uptake and Structural Organization With Attention to the Role of Photoinhibition
… had different combinations of pollutants. In photoinhibition study, both species exhibited significantly lower rates of photoinhibition in the desiccated state by inactivating their photosynthetic apparatus compared to in hydrated state. P. sulcata which is in less shaded habitat is more …
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Investigation of photoprotection of photosystem II by cytochrome b559
… this radiation incident on the earth's surface. Photoinhibition can be initiated by inopportune events that create damaging redox states within the photosystem II complex. One mechanism for protection against high light involves thermal deactivation of energy within pigment beds. In addition, …
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The ecological significance of leaf movements in Rhododendron maximum
… a favorable energy balance and/or avoiding photoinhibition and photooxidation. A series of leaf manipulation treatments were established to verify these potential explanations. These leaf treatments were designed to separate the influence of leaf curling and leaf angle on leaf energy budget, …
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Light energy management in peach: utilization, photoprotection , photodamage and recovery. Maximizing light absorption in orchard is not always the best solution
… the reactive species production increasing the photoinhibition risks. The dangerous consequences of photoinhibition forced plants to evolve a complex and multilevel machine able to dissipate the energy excess quenching heat (Non Photochemical Quenching), moving electrons (water-water cycle , …
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The photoprotective role of thermonastic leaf movements in Rhododendron maximum: potential implications to early spring carbon gain
… to determine the effects of restricting TLM on photoinhibition, net photosynthesis, and other gas exchange parameters, particularly during the early spring. After restricting TLM on certain leaves, we observed the above parameters from autumn 2005 to late spring 2006. Our results indicated that …
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Characterising natural genetic variation in dynamic photosynthesis and photoprotection in sorghum
… were used to investigate the effect of photoinhibition on the coordination between the C<sub>4</sub> carbon concentrating mechanism and Calvin-Benson-Bassham cycle CO<sub>2</sub> fixation. Imbalances between these cycles during stress conditions likely represent a loss of photosynthetic …
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Coordination of physiological and morphological acclimation of shade-grown tree saplings to late-season canopy gap formation
… and, for red oak, decreased susceptibility to photoinhibition. Morphological acclimation responses also varied among species, and included greater allocation to new leaf production and root production after exposure to a gap. Species such as red oak, which acclimated to canopy gaps (increased …
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Rubisco Activase -- a Typical AAA+ Protein With Unique Features, And, PIFI -- a Novel Chloroplast Protein Functioning in Chlororespiration
… but important in protecting plants from photoinhibition and mild heat stress.
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Exploiting the Productivity of C4 Photosynthesis in Cool Temperate Climates: Mechanisms and Thresholds of Cold Tolerance in Miscanthus, Saccharum, and Spartina pectinata
… energy and may predispose C4 grasses to chronic photoinhibition. Miscanthus x giganteus is a highly productive C4 perennial grass in cool temperate climates that is a model of photosynthetic chilling tolerance. Miscanthus is closely related to Saccharum a C4 genus that includes commercial …
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Investigation of mRNA Expression of Early Light Inducible Protein (ELIP) under High Light Stress <em>Arabidopsis thaliana</em>.
… not all is used. Excess light energy may lead to photoinhibition of photosynthesis and irreversible photooxidative damage. Plants have evolved mechanisms for energy dissipation under high light stress. One such response may involve production of <em>ELIP</em>.</p> <p>It is of interest to know what …
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Photosynthesis and nutrition in In Vitro plants
… results in plants being extremely sensitive to photoinhibition. Manipulation of carbohydrate in the growth medium and growth irradiance may result in increased photosynthetic capability of plants transferred to soil, and can increase survival. This appears to be a result of increased energy …
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Regulation of the chloroplast light harvesting antenna by plastoquinone redox: Modulation of chlorophyll metabolism and thylakoid complex organization
… of increasing crop yields for food and biofuels. Photoinhibition, the reduction of photosynthetic electron transport in the face of excess irradiance, is thought to contribute significantly to loss of photosynthetic yield and is therefore an area of particular interest in this respect. …
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Mathematical Modeling of Carbon and Light-Limited Algal Biofilms
… boundary layer, light limitation, and photoinhibition. Because of the interaction of pH with the inorganic carbon system, inorganic carbon can easily become growth limiting within a biofilm, even when bulk carbon dioxide concentrations are very favorable. The concentration boundary …
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Some aspects of the nitrogen nutrition and growth of Gracilaria gracilis grown by suspended cultivation in Saldanha Bay, South Africa
… below the water surface, possibly as a result of photoinhibition of photosynthesis at the surface. Nitrogen limitation ceased below about 2m growth depth. Prefertilization had no significant effect on yield after 4 weeks growth. Thallus colour showed a clear relationship with N content and may be …
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THE PHYSIOLOGICAL RESPONSE OF PICOPHYTOPLANKTON TO LIGHT, TEMPERATURE AND NUTRIENTS, INCLUDING CLIMATE CHANGE MODEL SIMULATIONS
… Long-term damage (accumulated over days) through photoinhibition is underestimated by the dynamic model. The maximum rate of photosynthesis is significantly lower for picoprokaryotes (0.81 − 1.44 d-1) than for picoeukaryotes (1.93 − 4.93 d-1). Also, their affinity for light is higher (7.15 − 12.42 …
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The impact of metals and other stress factors on microbial ammonia oxidation physiology and isotope effects
… availability of ammonium (NH4+) and NH3. Also, photoinhibition of AOO is widely reported. The mechanism is unknown, although links to reactive oxygen species (ROS) cycling seem likely. We present detailed investigations of three environmentally relevant AOO stress factors: metal micronutrient …
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Tropical stony corals host diverse microbial nitrogen dynamics
… but ammonium oxidation is low potentially due to photoinhibition and competition with uptake. Coral-associated rates of N2O production indicate potential for denitrification, although there are variations among species. The brain coral Diploria labyrinthiformis exhibits the strongest potential for …
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The effect of non-glaucousness, as conferred by Inhibitor of Wax 1, on physiology and yield of UK Wheat
… there was no difference between NILs in photoinhibition following an extended period of high light stress. Iw1 did not affect WUE or yield. However, non-glaucous Hereward and Alchemy NILs yielded 4.96±1.15% (p<0.001) and 2.59±1.01% (p=0.045) more than their glaucous counterparts, although …
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Änderung der Glycindecarboxylase- und Serinhydroxymethyltransferase-Aktivität in Blättern:
… reduzierte CO2-Assimilationsraten und Photoinhibition. Der lineare Elektronentransport war in diesen Fällen limitiert. In diesen Blättern wurde ebenfalls ein Anstieg an Glyoxylat und eine Abnahme des Spiegels an Glycerat-3-Phosphat beobachtet. Blätter mit reduzierter CO2-Assimilation …
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The Photoprotective Role of Anthocyanin Pigments in Leaf Tissues
… and reducing high-light stress (i.e. photoinhibition of photosynthesis). In a shade-adapted, abaxially-red understory species (Begonia heracleifolia), a photoprotective function was also supported, but through attenuation of internally-scattered green light transmitted through the …
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