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 36 for “"Relative Growth Rate"”.
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The Effect of Constant Relative Growth Rate Versus Constant Specific Growth Rate on Oocystis SP
… sp. (S002) was grown using two different growth strategies at three different temperatures (15°C, 20°C, 25°C). One strategy (GS1) kept a constant specific growth rate (µ) and the other (GS2) kept a constant relative growth rate (µ/µ<sub>max</sub>). In both strategies, the cultures were …
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Characterisation of nitrogen stress response genes of the marine Alga Gracilaria Gracilis
… by seaweeds that is most frequently limiting to growth. Biomass, relative growth rate, the concentration of nitrogen in the growth medium, the mean nitrogen uptake rate of the plant and the amount of nitrogen in the thallus were determined for nitrogen enriched and nitrogen deprived G. gracilis …
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Growth of Understory Saplings in a Forest Exposed to Elevated Carbon Dioxide
… be affected by rising atmospheric CO2. The growth response of different tree species varies and depends upon characteristics that enable response to CO2 concentration. The relationship between the sources (e.g., leaves) and sinks (e.g., new, developing leaves and roots) has been found to …
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Variation for root and shoot growth among wheat cultivars and the effects of barley yellow dwarf virus on growth
… wheat cultivars to evaluate differences in root growth, to evaluate the effects of barley yellow dwarf virus (BYDV) on root and shoot growth, and to study the effects of a plant growth regulator on root growth of healthy and BYDV infected plants. Cultivars evaluated were Caldwell, Cardinal, …
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Respiration during development and germination of muskmelon seeds (Cucumis melo L.)
Respiration rates of developing muskmelon (Cucumis melo L.) seeds were determined polarographically using a Clark-type O₂ electrode (Hansatech LD2). Seeds were obtained from fruits harvested 20, 30, 40, and 50 days after anthesis (DAA). Respiration (O₂ uptake) was measured for fresh intact seeds …
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Isolation and characterization of a novel lectin gene, Allium triquetrum agglutin, conferring insecticidal properties against Myzus persicae
… thaliana plants were subsequently generated using the Agrobacterium-mediated floral dip method. Six homozygous ATA-transformed lines and one empty vector-transformed control line were obtained using kanamycin selection. Several key growth parameters of the transgenic plants were …
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Dominance/Suppression Competitive Relationships in Loblolly Pine (Pinus taeda L.) Plantations
… diameter and the relationship between diameter relative growth rate (r) and initial size. Analysis with two spacing studies shows inequality increases with increasing density. For a given initial density, inequality initially decreases and then begins to increase as trees compete for resources. …
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The effects of rhizosphere inundation on the growth and physiology of red maple (Acer rubrum L.) seedlings derived from wet and dry sites
… Thirteen weeks of soil inundation on seedling growth found no interactions between flooding and maternal hydrologic condition. However, flooding significantly decreased leaf, stem, and root dry matter accumulation as well as height growth, leaf area growth, root to shoot ratio, mean relative …
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Phylogenetic and functional growth from diversification in the Cape grass genus Ehrharta Thunb
… reconstruction of ancestral habitats and growth form attributes indicates that such radiation is associated with a historical transition to seasonallydrier but more fertile habitats, and the coincident or subsequent evolution of several growth form novelties (e.g. buried and swollen culm …
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Light microsite requirements of seedlings of some Afromontane forest tree species: the role of canopy gaps promoting regeneration
… tree species were made by testing above ground relative growth rate (RGR) and photosynthetic response of seedlings of the respective species under different light intensities. Virgilia oroboides and Halleria lucida, with either a very high photosynthetic rate or RGR, were regarded to be pioneer …
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The autecology of Stipa Trichotoma Nees (Nassella Tussock) on Rhodes Estate, in the South-Western Cape
… on the lower slopes of Devil •s Peak. The relative growth rate of tussocks in the field was studied using nondestructive methods while more accurate biomass experiments were undertaken on nursery grown plants. These experiments revealed that nassella tussock has a relatively low growth rate …
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Some aspects of the seed development and seedling growth of rimu, Dacrydium cupressinum, Lamb
… Westland and Catlins) were used in a variety of growth experiments to examine their responses to different growing irradiances, temperature regimes, photoperiods and seasons. Growth was assessed by growth analysis and direct measurement. Gas exchange studies were made using an infra-red gas …
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Effects of nitrogen and water on growth, photosynthesis, and leaf properties of deciduous tree species with consequences for gypsy moth herbivory
… levels of N and water availability in the field. Growth and biomass allocation were examined for the three species. Photosynthetic response was determined and feeding trials with gypsy moth larvae were conducted with both birch species. I found that the effects of nitrogen on growth and biomass …
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Role of mycorrhizal networks in dry Douglas-fir forests
… on interplant carbon transfer and survival, growth, physiology, and EM status of neighboring naturally regenerated and planted Douglas-fir seedlings. To do this, I used MN-restricting treatments and isotope gas-labeling techniques on sites harvested with variable tree retention to investigate …
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Negative Effects Of ComMycorrhizal Networks And Roots On Upland Oak Seedlings In Open-Canopy Woodlands And Closed-Canopy Forests
… on the persistence of seedlings in the shade and growth within canopy gaps. Through the sharing of carbon and/or water between adults and seedlings, connection to a commycorrhizal network potentially provides a mechanism by which oak seedlings could persist in shade and/or grow rapidly in dry …
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Crescimento do porta enxerto 'Sunki tropical' (Citrus sunki hort. ex tan) em substratos orgânicos.
… was to evaluate the effect of three organic substrates on vegetative rootstock 'SxC Tropical' (Citrus sunki Hort. Former Tan.). The work was conducted in the greenhouse Lab Fruit of the Center for Agricultural Sciences (CCA) belonging è Federal University of Paraíba (UFPB). The rootstock used was …
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Red spruce physiology and growth in response to elevated CO₂, water stress and nutrient limitations
… because of reported changes in population growth. Whether red spruce (Picea rubens Sarg.) populations are declining because of disease, pollution or environmental stress or experiencing natural changes in stand development is unclear. This research examined the growth and physiological …
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Purple nutsedge (Cyperus rotundus L.) competition with cotton: Species biology and effects of proportion, density, and moisture
… from greater soil depth and maintain a high rate of photosynthesis during water stress enabled it to maintain higher RGR (relative growth rate), LAR (leaf area ratio), and leaf expansion than nutsedge. Absolute growth rate (AGR), initial propagule weight, and early shoot production were …
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Physiological and Morphological Responses of Nitrogen-Fixing Red Alder (Alnus Rubra) and Sitka Alder (Alnus Viridis Ssp. Sinuata) to Flooding: Inter- and Intraspecific Comparisons
… sites vary genetically in their capacity to tolerate flooding, I conducted greenhouse experiments subjecting both species to a short term flood of 20 days, red alder to a long term flood of 50 days, and seedling progeny of red alder to a flood of 20 days. Relative growth rate (RGR), the primary …
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Mono-Oxygenase Activity and Nutritional Ecology of Larvae of the Gypsy Moth, Lymantria Dispar
… indicate that basal MFO activity levels are relatively low in gypsy moth larvae, and that ingestion of pine foliage or inducer-containing diets has little or no effect on gypsy moth MFO activity. To investigate whether gypsy moth performance differs on oak vs. pine foliage, quantitative …
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