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 24 for “"plant survival"”.
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Soil Amelioration and Plant Establishment on Sodium Affected Soils on Galveston Island, Texas
… at the study site. In addition, three species of plants, live oak (Quercus virginiana), hybrid bald cypress (Taxodium distichum), and yellow hibiscus (Hibiscus hamabo) were planted on the treatment plots. A randomized factorial design using the eight treatment combinations with the three plant …
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A Study of the Effect of Herbicides on Mycorrhizae Associated With Native Warm Season Grass
… herbicide treatments caused a negative effect on plants and mycorrhizal colonization. Plant survival was directly correlated with the presence of mycorrhizae and lower rate of herbicides applied. Herbicide application appeared to have little effect on colonization and intensity rate of …
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Sorghum ratooning as an approach to manage covered kernel smut and the stem borer Chilo Partellus
… the cutting back of the stems had an effect on plant survival and yield; cutting back stems at harvest produced higher yields than cutting the stems at the on-set of rains, however cutting the stems at the onset of rains increased plant survival when the stems were dry at harvest. A decision …
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A putative approach for influencing stomatal density by over-expressing NADP-dependent malic enzyme in arabidopsis
<p>Stomata are leaf structures critical for plant survival because they modulate the rate of transpiration. This study will examine a possible mode for regulating stomatal density by over-expressing NADP-dependent malic enzyme (NADP-ME), which is thought to deplete the counter-anion pool in …
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Soil Moisture Measurements and Modeling at a Geomorphically Reclaimed Coal Mine in New Mexico
… the model to investigate seed germination and plant survival for a range of slope aspects and climate conditions. Disturbed and undisturbed samples of reclaimed soil were collected for laboratory tests from the mine site located in northwest New Mexico. Saturated and unsaturated hydraulic …
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Inositol Pyrophosphate Phosphatases as Key Enzymes to Understand and Manipulate Phosphate Sensing in Plants
… is one of the three major macronutrients that plants need to grow and survive. When P is scarce, plants utilize a network of characterized responses known as the Phosphate Starvation Response (PSR) to remobilize internal stores of P as well as external P from soil. Emerging evidence shows the …
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Investigation on Revegetation/ Phytoremediation of Campo Pisano abandoned mine area
… and mineralogical characteristics of the soil-plant system through X-ray diffraction (XRD) and scanning electron microscopy (SEM) • Zn,Pb and Cd concentration and its bioavailable fractions in contaminated substrates • the metal accumulation and translocation behaviour in P. halepensis …
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Plants in urban brownfields: modeling the driving factors of site conditions and of plant functional group occurrence in a dynamic environment
… was to detect relevant strategies for species survival in urban brownfields and to find general rules for the development of this dynamic environment. Empirical studies were done on urban brownfields of Bremen and Berlin, Germany. Presence/absence data of vascular plants, traits of selected …
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Physical and chemical properties of coarse coal refuse from Southwest Virginia
… fraction. The physical factor most limiting to plant growth was found to be low water holding capacity. Low pH was found to be the chemical factor most limiting to plant survival. These findings indicate that some refuse piles may be suitable for direct seeding, but many will require heavy lime …
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Evaluation of Grafting Rootstocks on Plant Growth, Fruit Yield and Quality in Tomato (Lycopersicon esculentum Mill).
Grafting is the process of combining two parts of plants to form a single plant. Grafting is a common technique in trees and vine crops and is becoming popular in annual vegetable production in order to control biotic and abiotic stresses, improve fruit yield and quality. The objectives of the …
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Nondestructive investigation of soil moisture level using optical system
… it plays an important role in the growth of land plants. Soil testing is an effort to assess the soil constituents and moisture level; this information is useful to evaluate soil fertility and plant survival. This research describes the use of an optical system combined with Artificial Neural …
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The impact of silver nanoparticles on plant physiology
… impact following interaction between ENPs with plants and soil microbial communities is of great concern given that they play fundamental roles in the environment and food production. In this study, the impact of capped silver nanoparticles (cAg NPs) on terrestrial (Arabidopsis thaliana and …
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Influence of light conditions on the dynamics of Tetranychus urticae and its control by the predatory mite Neoseiulus californicus
… densities than with 12h LED and natural light. Plant survival was unaffected by light in the absence of predators but was significantly lower under continuous light with predators than with natural light or 12-hour LED light, both with predators. These findings demonstrate that natural light and …
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Expanding the genetic variability of flatpea using tissue culture, mutagenesis, and intercrossing techniques
… were utilized: (1) regeneration of flatpea plants from tissue culture to produce potential somaclonal variants, (2) seed irradiation and screening of potentially mutated progeny, and (3) intercrossing among flatpea accessions. Low-frequency whole plant regeneration of flatpea was obtained …
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Managing Weeds and Soilborne Pests with Fumigant and Non-Fumigant Alternatives to Methyl Bromide
… tomato hybrid rootstocks increased yields and plant survival in bacterial wilt infested fields. "Cheong Gang", "BHN 998", and "BHN 1054" were the best performing rootstocks for bacterial wilt resistance and tomato fruit yield in severely infested fields. Grafting increased tomato yield and …
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Physiological and Morphological Responses to Drought Stress in Different Cultivation Environments in Wild Type and ABA-deficient Barley
… change, drought is one of the most critical for plant survival and reproduction, shaping plant morphology and physiology and therefore crop productivity. Although the effects of drought on plants are widely studied, studies are often conducted in controlled greenhouse or laboratory conditions …
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EPSPS gene duplication in Palmer amaranth: relative fitness, inheritance, and duplication mechanism of the glyphosate resistance trait
… (Amaranthus palmeri S. Wats.) is a weedy plant species that has invaded agricultural fields in at least 25 states, raising the cost of weed control to more than 4x the original cost. In most areas, the resistance is conferred through a gene amplification mechanism in which the target gene …
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Unraveling the roles of autophagy in proteome dynamics and energy metabolism in plants under abiotic stress
Abiotic stresses impose major constraints on plant growth and productivity by disrupting cellular homeostasis, energy metabolism, and resource allocation. These challenges are further intensified by climate change, which increases the frequency, duration, and severity of environmental stresses. …
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Characterization of HPPD-inhibitor resistance in waterhemp (Amaranthus tuberculatus)
… a novel form of resistance to HPPD inhibitors. Plants grown from seed collected at the suspected resistance site demonstrated reduced sensitivity to foliar applications of the HPPD inhibitors mesotrione, tembotrione, and topramezone. Furthermore, a mesotrione dose response comparing MCR with two …
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Unraveling the ORE1 regulon in Arabidopsis thaliana : molecular and functional characterization of up- and down-stream components
Leaf senescence is an active process required for plant survival, and it is flexibly controlled, allowing plant adaptation to environmental conditions. Although senescence is largely an age-dependent process, it can be triggered by environmental signals and stresses. Leaf senescence coordinates the …
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