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 27 for “"root production"”.
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Post-Transplant Root Production, Mortality, and Periodicity of Landscape-Sized Shade Trees
A more thorough knowledge of rooting behavior of transplanted trees is needed to better understand plant establishment. The objectives of this research were to: 1) determine if transplant timing affected root system regeneration of northern red oak (Quercus rubra L.) and willow oak (Q. phellos L.), …
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Ozone effects on red oak root dynamics
… foliage damaged by ozone would decrease fine-root production and turnover. The red oak trees and seedlings were fumigated for three years with three levels of ozone (subambient, ambient, and 2X ambient) in open-top chambers. After two seasons of exposure, 2X ozone (0.082 ppm 7hr-mean conc.) …
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Root Dynamics, Management Effects and Carbon Sequestration on Invaded and Native Semi-Arid Grasslands
Root dynamics are a major component of terrestrial ecosystem processes but they have not been broadly studied, due to the difficulty of quantifying root production and mortality. The use of minirhizotrons facilitates belowground research, but sample intervals are controversial since long intervals …
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Effects of plant invasions on ecosystem processes: Linking above- and below-ground resource-use strategies of native and invasive species in Eastern U.S. forests
… amount of N from litter, they had greater root production and specific root length associated with a greater soil nutrient uptake capacity than natives. In the second study, I examined whether the different tissue traits are associated with litter decomposition rate and if invaders can …
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Belowground Carbon Budget and Nutrient Uptake of Temperate Forest Species in Response to Elevated Carbon Dioxide and Temperature
… ecosystems is lost from belowground through root respiration. Maintenance respiration of attached fine roots was measured on mature loblolly pine and sweetgum (Liquidambar styraciflua ) growing in atmospheric CO2 elevated by 200 mu1 1 -1 above ambient. Fine root maintenance respiration on a …
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Establishment and Competitive Ability of Nelumbo Lutea in Relation to Myriophyllum Spicatum
… Biomass allocation shifted significantly to root production between 3 and 6 weeks in the 10 and 24% levels. Survival decreased with increasing planting depth, and biomass of survivors reduced significantly between 0.5, 1.0, and 1.5 m depths. Nelumbo lutea and Myriophyllum spicatum populations …
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Fine Root Dynamics in a Pinus palustris Mill. Ecosystem: The Role of Sampling Interval and the Soil Environment
… examined the impact of sampling interval on fine root production and mortality estimates by comparing data from a weekly minirhizotron sampling regimen to subsets of the same data representing biweekly, monthly, bimonthly, and quarterly sampling regimens. We also investigated possible sources of …
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Photosynthesis and nutrition in In Vitro plants
… also affect growth morphology. In particular, root production in woody material can be affected, and can have a significant effect on nursery survival.
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Creeping bentgrass response to plant growth regulating substances and annual bluegrass competition
… creeping bentgrass overall quality and seasonal rootmass production was evaluated. It was observed that creeping bentgrass does not become well established when overseeded into annual bluegrass regardless of plant growth regulator applications or season. Additionally 1I plant growth regulator …
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Produção de mandioca (Manihot esculenta Cranz) sob dois sistemas de plantio
… Northeast. The research aimed to evaluate the production of aboveground biomass and root production of two varieties of cassava tame popularly known as "Cedinha" and "Pão do Chile", which are grown in two planting systems: Leirão and Cova. The trial was conducted under field conditions in the …
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Vegetative Community and Health Assessment of a Constructed Juncus-Dominated Salt Marsh in The Northern Gulf Of Mexico
… but function of the salt marsh in terms of root production and sediment organic carbon deposition remained underdeveloped when compared to the natural reference site. All sites were found to be vulnerable to sea level rise except under the lowest sea level rise scenario. Further monitoring …
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Somatic Embryogenesis of Pathogen-Free Horseradish (Armoracia Rusticana) Plants in Vitro
… in the United States for many years. Horseradish root production in Illinois had recently decreased due to a disease complex that causes root discoloration and rots. The use of pathogen-free (PF) horseradish planting stock was a means for the Illinois horseradish growers to restore root quality …
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Somatic embryogenesis of pathogen- free horseradish (Armoracia Rusticana) plants in vitro
… in the United States for many years. Horseradish root production in Illinois had recently decreased due to a disease complex that causes root discoloration and rots. The use of pathogen-free (PF) horseradish planting stock was a means for the Illinois horseradish growers to restore root quality …
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Effects of Elevated Atmospheric CO2 on Root Dynamics, Biomass and Architecture in a Scrub-Oak Ecosystem at Kennedy Space Center, Florida
… ecology lies with our understanding of root system growth, function and distribution. Large belowground structures, in addition to fine roots, are of particular interest because of their role in carbon sequestration. Non-destructive methods, including ground-penetrating radar (GPR) and …
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Molecular and Physiological Aspects of Arbuscular Mycorrhizal Symbiosis with near-Isogenic White Clover: A Gene Expression Study
… phenotypic response discovered was a decrease in root production in response to AMF colonisation.<br/><br/>Differential display demonstrated differences in gene expression in both leaves and roots of clover with and without AMF. These genes were mainly down-regulated in AMF plants and three were …
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The combined effects of salinity and sulfide on the growth and physiology of the freshwater marsh plant Pancium hemitomon J.A. Schultes
… there was a sulfide-induced stimulus in the production of adventitious tissue that was completely inhibited by elevated porewater salinities. After 19 weeks, salinity at 4 ppt and elevated sulfide concentrations were deleterious to overall plant growth. A sulfide-induced growth stimulation in …
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Coordination of physiological and morphological acclimation of shade-grown tree saplings to late-season canopy gap formation
… 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 carbon gain within the season of gap formation), demonstrated coordinated changes in both physiological and morphological …
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Measuring Root Growth Response to Nitrogen Fertilization Rates in Young Pecan Seedlings Using the Minirhizotron Method
… how N affects the establishment of pecan tree roots, specifically fine roots (0-2 mm) responsible for nutrient uptake. The objectives of this study are to: 1) determine how fine root growth is impacted by five rates of N fertilizer and 2) pinpoint times in the growing season when fine root …
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