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Articles 1 - 9 of 9
Full-Text Articles in Entire DC Network
Nitrogen Transfer From Cover Crops To The Subsequent Grain Crop And The Influence Of Variability In Winter Conditions, Spencer Heuchan
Nitrogen Transfer From Cover Crops To The Subsequent Grain Crop And The Influence Of Variability In Winter Conditions, Spencer Heuchan
Electronic Thesis and Dissertation Repository
Cover crops, which are used to provide ground cover after the harvest of the grain crop, can potentially improve the sustainability of agroecosystems by reducing nutrient losses. However, few data are available to document the extent to which cover crops improve both the retention of soil nitrogen (N) and the transfer of this N to the grain crop. The efficiency of this N transfer may be further influenced by variation in winter soil temperature; for example, reduced snow cover can increase the frequency and intensity of soil freezing, which can affect the survival of cover crops and the timing of …
Cadmium Uptake In Plants As Influenced By Selenium Uptake And Sulphate Availability, Marnie J. Demand
Cadmium Uptake In Plants As Influenced By Selenium Uptake And Sulphate Availability, Marnie J. Demand
Electronic Thesis and Dissertation Repository
With cadmium uptake by plants posing a risk to plants and consumers alike, strategies to reduce metal uptake are desirable. One strategy may be to apply selenium (as selenate) to the growth medium. I hypothesized selenate would yield greater lignification, with a higher proportion of cadmium bound to root cell walls. Consequently, higher selenium in plants would result in greater tolerance to cadmium. Additionally, since selenate is taken up in place of sulphate, providing the plants with high sulphate would inhibit uptake and translocation of selenium, mitigating selenate’s benefits of reducing cadmium uptake and translocation. Experimental results did not support …
The Biosynthesis Of Non-Protein Sulfur Amino Acid In Developing Seeds Of Common Bean, Zixuan Lu
The Biosynthesis Of Non-Protein Sulfur Amino Acid In Developing Seeds Of Common Bean, Zixuan Lu
Electronic Thesis and Dissertation Repository
The protein quality of common bean (Phaseolus vulgaris) is associated with the level of dietary essential sulphur amino acids – methionine and cysteine. Extra sulphur that cannot be stored in the protein pool accumulates as the non-protein amino acid S-methylcysteine (S-methylCys) and its dipeptide γ-glutamyl-S-methylcysteine (γ-Glu-S-methylCys). Previous studies have indicated that S-methylhomoglutathione (S-methylhGSH) is present in the developing seed of common bean. It is hypothesized that S-methylhGSH is the key intermediate in the biosynthetic pathway of the γ-Glu-S-methylCys that leads to …
Utilizing Rnai Technology To Develop Novel Agricultural Pesticides, Ethan B. Zand
Utilizing Rnai Technology To Develop Novel Agricultural Pesticides, Ethan B. Zand
Undergraduate Student Research Internships Conference
A general description of why RNAi based pesticide technology is a breakthrough technology able to target only pests while not harming others. This presentation gives a summary of RNAi technology, the current drawbacks of conventional pesticides, and our research on how RNAi can be used against the two-spotted spidermite; a polyphagic pest that causes significant financial damage to Canadian and worldwide agriculture
My Summer Working With Two-Spotted Spider Mites, Renée A. Smith
My Summer Working With Two-Spotted Spider Mites, Renée A. Smith
Undergraduate Student Research Internships Conference
Two-spotted spider mites are a polyphagous pest, capable of eating a magnitude of food crops which causes a large problem for Canadian agriculture. Their ability to consume various crops stems from their ability to adapt to various chemical defence mechanisms. This ability allows them to acquire resistance to many commonly used pesticides. This has resulted in large infections in Canadian farms with few options to prevent the pests from affecting crop yields. Take a look at my project if you'd like to see how the Grbic lab is working to combat this issue using genetic engineering techniques!
Fungal Co-Pathogenicity On Panax Quinquefolius, Andrea Ong
Fungal Co-Pathogenicity On Panax Quinquefolius, Andrea Ong
Undergraduate Student Research Internships Conference
American ginseng (Panax quinquefolius) is a perennial crop commonly grown for its medicinal properties. Ginseng replant disease (GRD) is a condition that prevents the re-cultivation of ginseng in previous ginseng gardens and is normally associated with extensive root rot caused by the fungus Ilyonectria mors-panacis. My project aims to investigate the relationship common GRD fungal pathogens and their pathogenicity on 1 year old ginseng seedlings.
A Bacterial Microbiome Analysis Of Solarized Ginseng Garden Soils, Anka Colo
A Bacterial Microbiome Analysis Of Solarized Ginseng Garden Soils, Anka Colo
Undergraduate Student Research Internships Conference
American ginseng (Panax quinquefolius) is a highly valued perennial crop grown for its roots during a four-year cultivation cycle. American ginseng is subject to ginseng replant disease (GRD) in which severe root rot develops in newly planted ginseng grown in a former ginseng garden. A common strategy to mitigating GRD is not available and techniques such as fumigation, fungicides, and biocontrol are ineffective, banned, or are slowly being phased out. Alternatively, soil solarization is a pre-plant technique used to treat soil to reduce disease inoculum and alter soil microbiomes. In summer 2019, a six-week soil solarization experiment was …
Manipulating The Root Mycobiome To Improve Plant Performance And Reduce Pathogen Pressure In Corn (Zea Mays), Noor F. Saeed Cheema
Manipulating The Root Mycobiome To Improve Plant Performance And Reduce Pathogen Pressure In Corn (Zea Mays), Noor F. Saeed Cheema
Electronic Thesis and Dissertation Repository
Crop yield often varies within a field of a single genetically uniform crop plant, with the causes presumed to be a mix of both biotic and abiotic factors. Manipulating crop root mycobiomes could potentially increase yield by reducing pathogen impacts and improving access to soil water and nutrients. This study aimed to identify different fungal inoculation treatments that could increase the growth of corn seedlings sown in low productivity soils to that in high productivity soils and shift the root mycobiome composition. Fungal inoculation treatments did not have significantly different root mycobiome composition than seedlings grown in low yield control …
Dr. Laurie L. Consaul Herbarium (Uwo), Lauren H. Rego
Dr. Laurie L. Consaul Herbarium (Uwo), Lauren H. Rego
Community Engaged Learning Final Projects
Along with the provided databased species, students scanned 257 specimens within the physical herbarium at Wester.