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 115 for “"stomatal conductance"”.
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Effect of soil nutrient status on stress tolerance in Proteaceae
… period). In stressed and unstressed treatments, stomatal conductance and transpiration rates of plants grown on the low nutrient treatment was generally lower than that of plants grown on the medium and high nutrient treatments where stomatal conductance and transpiration rates were similar. …
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Water-use efficiency and productivity in native Canadian populations of Populus trichocarpa and Populus balsamifera
… nitrogen-use efficiency, ¹³C/¹²C isotope ratio, stomatal conductance, and overall productivity were evaluated. Gas exchange variables measured included net photosynthesis, transpiration rate, stomatal conductance, and intercellular CO₂ content. Water-use efficiency and ¹³C content across all …
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Transpiration and the water relations of barley
… of evapotranspiration, leaf water potential and stomatal conductance were made with a barley crop over the spring and summer of 1979. From these measurements a model of transpiration from barley was developed. Predictions of the model were compared with Bowen ratio measurements of …
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A long-term record of the physiological plasticity of stomatal condactance in Proteaceae
… regimes is to minimise water loss by reducing stomatal conductance (gs) and simultaneously increasing intrinsic water-use efficiency (iWUE). Plasticity in these two physiological traits may enhance the ability of plants to survive future climate change. There is considerable evidence in the …
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Nighttime evapotranspiration in a semiarid climate using a hemispherical chamber
… better account for ETn by incorporating separate stomatal conductance models for daytime and nighttime. The amount of ETn measured on these three nights were estimated to be 25 percent of the total ET24 modeled from micrometeorological data. Results from this study suggest that the single stomatal …
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Strategies to improve C4 photosynthesis, water and resource-use efficiency under different atmospheres, temperatures, and light environments
… model, showing that a substantial reduction in stomatal conductance at today's atmospheric [CO2] could cut plant water loss with minimal consequence to total CO2 assimilation. This emerges as a result of the apparent lack of photosynthetic acclimation to increasing atmospheric [CO2], as implied …
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Measuring the Physiological Effects of Methylobacterium oryzae Foliar Inoculation onto Salt-Stressed Tomatoes grown in a Greenhouse Semi-Hydroponic System
… or fruit Brix levels but did decrease stomatal conductance and fruit yield. In Trial 1, inoculation with <em>M. oryzae</em> did not improve yield-related parameters or net carbon assimilation but increased Fv’/Fm’, decreased NPQt and stomatal conductance, and increased instantaneous …
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Determining transpiration efficiency of eight grain sorghum lines [Sorghum bicolor (L.) Moench]
… Instantaneous measurements of assimilation (A), stomatal conductance (gs), and transpiration by gas exchange provided measures of the transpiration efficiency at the leaf level. Growth observations and soil water balance in field plots quantified components of whole-plant TE. Growth and …
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The Influence Of The Circadian Clock On Stomal Conductance And Carbon Assimilation In Arabidopsis thaliana
… the influence of the circadian clock on stomatal conductance and carbon assimilation and the decoupling of these processes. Timing of Cab (TOC1) and Circadian Clock Associated 1 (CCA1) genes were overexpressed and tested to investigate the impact of altered clock rhythms. Evidence showed …
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Characterization of the impacts of the physiological response of vegetation to increasing levels of atmospheric carbon dioxide
… showed that the impact of increased CO2 on stomatal conductance generally led to statistically significant changes in latent heat flux (LHF), temperature, and rainfall, at global to regional scales. The CO2-induced reduction in stomatal conductance decreased LHF from the surface, resulting …
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The Physiological Impacts of Soil Alkalising Agents on Legumes.
… rates (targeting pH 6.5) consistently reduced stomatal conductance by 26-35% and 20-59% and photosynthesis by 11-20% and 17-30% in dwarf bean (Phaseolus vulgaris L. Nassau) and tall pea (Pisum sativum L. cv. Alderman) respectively. Consequently, mean shoot dry weights were reduced by 13% and …
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Coordinated Tree Responses to Drought -Vulnerability and Sustainable Production: Hypotheses on Arid Ecosystem Adjustments to Limitations in Water Resources
… growth, sap flux density, leaf transpiration and stomatal conductance, tissue water relations and isotope labeling. Similar measurements were conducted on plants growing in the greenhouse. Also examined in the greenhouse were root biomass, root structure as well as whole plant biomass …
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Physiology, genetics and genomics of drought adaptation in Populus
… and Populus trichocarpa, showed differences in stomatal conductance and carbon isotope composition in both clones and the F2 progeny. It was also used to discover QTL related to water use efficiency highlighting interesting areas of the genome. Combining QTL discovery and microarray analysis of …
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Physiological Responses of Cotton Genotypes to Water-Deficit Stress during Reproductive Development
… squaring and flowering stages would impair stomatal conductance and photosynthetic efficiency of leaves, which consequently would result in osmotic adjustment through accumulation of compatible solutes, increased activity of enzymes, and perturbation of carbohydrates metabolism in leaves and …
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Pre- and Postharvest Practices for Optimizing the Postharvest Quality of Cut Sunflower, Dahlia, and Delphinium
… Deficit irrigation did not change vase life, stomatal conductance, or transpiration rates of delphinium 'Guardian Blue.' Studies tested the effects of foliar calcium applications or benzyladenine application on sunflower 'Moulin Rouge' and 'Procut Lemon.' Calcium did not change the vase life, …
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The role of hydraulic strategies in understanding the response of fynbos to drought
… respond to dehydration by rapidly decreasing stomatal conductance (gs) (isohydric), thereby maintaining relatively constant midday minimum water potential, from those that maintain relatively high gs (anisohydric), thereby maintaining carbon assimilation albeit at the cost of hydraulic …
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CHALLENGES TO ESTABLISHING OAKS AND PECAN IN BOTTOMLAND FORESTS IN THE POST OAK SAVANNAH AND BLACKLAND PRAIRIE
… rates on most of the measurement dates. Stomatal conductance and transpiration were higher for pecan than bur oak on most of the measurement dates.</p>
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Stomatal sensitivity to photosynthetic and environmental signals in glycine max grown at elevated atmospheric concentrations of CO2 and O3
… and interior of leaves is actively controlled by stomatal pores and termed stomatal conductance (gs). gs is highly regulated in response to environmental factors and a key determinant of plant carbon gain, water use and ozone uptake. The Ball, Woodrow and Berry (1987, Progress in Photosynthetic …
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