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 18 of 18 for “"Antagonistic interactions"”.
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Population genomics of Sulfolobus islandicus: genome-wide recombination and antagonistic interactions
… to reinforce species boundaries. Finally, antagonistic interactions among these ten genome strains, as well as an expanded set of strains isolated from multiple hot springs and time points were catalogued and shown to correlate with genetic distance. Characterization of the genetic …
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Interactive Effects of Imazapyr plus Triclopyr Ester and Imazapyr plus Glyphosate Mixtures on Woody Weed Seedlings
… analysis. A determination of synergistic or antagonistic interactions was made using response surface analysis, the nonlinear blending method, the isobologram method, and the Colby method. Imazapyr plus triclopyr ester mixtures were found to be synergistic on black cherry (p < 0.05), with …
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The phytotoxic effect of ALS inhibiting herbicide combinations in prairie soils
… would result in an additive, synergistic, or antagonistic interaction. This was determined through field trials where herbicides were applied sequentially over the course of two years and through dose-response modelling. The herbicides examined in these experiments were imazamethabenz, …
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Multiscale Views of Multi-agent Interactions in the Context Of Collective Behavior
… at the group level are the consequence of local interactions among the individuals. We can learn from these biological systems, which have successfully evolved to operate in noisy and fault-prone environments, and understand how these complex interactions can be applied to engineered systems …
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Effects of a dual application of entomopathogenic nematodes and entomopathogenic fungi against a forest pest, Hylobius abietis L. (Coleoptera: Curculionidae) and a horticultural pest, Otiorhynchus sulcatus F. (Coleoptera: Curculionidae)
… these pathogens may also result in additive or antagonistic interactions which would be of no benefit to growers. Hylobius abietis (large pine weevil) and Otiorhynchus sulcatus (black vine weevil) cause economic damage to forestry and horticultural crops, respectively. Large pine weevil larvae …
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The influence of non-inhibitory concentrations of purified pyocin S2 on Pseudomonas aeruginosa isolates
… can diverge into many morphotypes. Intraspecies interactions between strains and morphotypes leads to a complex environment involving both beneficial and antagonistic interactions. S-type pyocins are bacteriocin proteins produced by P. aeruginosa that can inhibit closely related strains. …
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Genetic network regulating variation in vegetative phase change in maize
… promote adult leaf identity by influencing the antagonistic interactions of miR156 and miR172; whereas Gl15 conditions changes in epicuticular wax composition between juvenile and adult leaves by activating aldehyde reductase and suppressing aldehyde decarbonylase.
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Loblolly Pine Genetics Structure Its Mycorrhizal Community
… as drought tolerance, and to alter competitive interactions within and among plant species. In addition to symbiotic interactions belowground with EM fungi, loblolly pine populations are subject to aboveground antagonistic interactions in the form of insect pests and fungal pathogens. Through …
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Physiological studies with the experimental herbicide isouron
… experiments were conducted to assess the interactions of isouron and four herbicide antidotes on two varieties of corn (Zea mays L.), Dekalb 'XL72AA' and 'XL67', and wheat (Triticum aestivum L.), 'Tyler' and 'McNair 1003'. Antidotes used were naphthalic anhydride (1,8 naphthalic …
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A deadly hug : contact-dependent killing by Caulobacter crescentus, via cell surface-associated glycine-zipper proteins
… for resources within microbial communities, antagonistic interactions between bacterial species are often mediated by diffusible inhibitory compounds, which can be diffusible or delivered in a contact-dependent manner. Bacteriocins are one ubiquitous type of such antimicrobials, and …
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Exploiters and exploited: antagonism, mutualism and mimicry in an ecological community
Interactions between species shape the natural world, and range along a continuum from mutualistic (benefitting all parties) to antagonistic (harming at least one party). Typically, interacting species are studied in a pairwise manner, and such studies have yielded a wealth of insights. However, …
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Ecology of plant-animal interactions during plant population expansion processes
Plant-animal interactions are crucial for maintaining ecosystem functionality and biodiversity. Ecological research has shown that these interactions can be modified in different contexts, affecting natural dynamics. Currently, significant changes in the landscape, such as rural abandonment or the …
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Antimicrobial, cytotoxic and prelimenary phytochemical analysis of four medicinal plants and their formulation
… there was 1 synergistic interaction, 25 additive interactions and 14 antagonistic interactions between the plant extracts. The methanolic formulation 3 showed the best overall phenolic content at 11.85±0.109 mgGAE/g whilst aqueous X. caffra extract showed the least content at 4.546±0.104 mgGAE/g. …
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Toxicology and herb-drug interaction of selected anti-hypertension plants used by lay persons in Northern KwaZulu-Natal (South Africa)
… In the BSLA, six plant combinations showed antagonistic interactions (aqueous and organic extracts). In the Ames test five combinations from organic extracts had antagonistic interaction with only two aqueous combinations showing antagonistic response. For the herb-drug interaction studies, …
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Combining microbial functional metagenomics and Caenorhabditis elegans genetics to uncover and characterise novel bioactive compounds
… objective of this study was to investigate the antagonistic activities of bacteria-eukaryote interactions. The first aim of this thesis was to develop a novel functional (meta) genomic screen for the identification of inhibitors that target the nematode Caenorhabditis elegans. Environmental DNA …
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The interactive effects of fire and herbivory on understorey vegetation and its dependent fauna
Interactions between multiple disturbances have been shown to have unexpected, and often undesirable effects on ecosystems and biodiversity. Improving our ability to predict and manage the outcomes of multiple disturbances is therefore an important research priority. In this thesis, I focused on …
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The interactive effects of fire and herbivory on understorey vegetation and its dependent fauna
Interactions between multiple disturbances have been shown to have unexpected, and often undesirable effects on ecosystems and biodiversity. Improving our ability to predict and manage the outcomes of multiple disturbances is therefore an important research priority. In this thesis, I focused on …
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DEVELOPMENT OF THE LARVAL PERIPHERAL NERVOUS SYSTEM IN THE ASCIDIAN CIONA INTESTINALIS: ROLE OF THE RETINOIC ACID AND FGF/WNT SIGNALLING PATHWAYS AND OF THE POU TRANSCRIPTION FACTORS.
… with two main aims: a) to understand how the interactions between Retinoic Acid (RA) and the FGF/WNT pathways control its development; b) to study the role played by transcription factors of the POU family in its differentiation. Within chordates, tunicates represent the sister group of …