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Showing 1 to 20 of 116 for “"Amaranthus"”.
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Hybridization Between Amaranthus Tuberculatus and Amaranthus Hybridus
… related species. Studies have shown that weedy Amaranthus species are capable of interspecific hybridization, and hybridization may foster the evolution of herbicide resistance. Yet, much remains unknown as to the dynamics of Amaranthus interspecies gene flow. The research presented in this …
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Understanding gender determination in dioecious Amaranthus weeds palmer amaranth (Amaranthus palmeri) and waterhemp (Amaranthus tuberculatus)
… of dioecious weeds. Common waterhemp (Amaranthus tuberculatus (Moq.) Sauer var. rudis (Sauer) Costea and Tardif) and Palmer amaranth (Amaranthus palmeri S. Watson) are troublesome weeds of row-crop production in the United States. Their dioecious reproductive systems ensure outcrossing, …
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Characterization of PPO-inhibitor resistance in waterhemp (Amaranthus tuberculatus) and Palmer amaranth (Amaranthus palmeri)
Waterhemp and Palmer amaranth are two of the most troublesome weed species in the Midwest. The overuse of acetolactate synthase (ALS), photosystem II, and 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) inhibitors to control these species led to the evolution of resistance to these herbicides …
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Understanding the genetic basis of dioecy in waterhemp (Amaranthus tuberculatus) and palmer amaranth (Amaranthus palmeri)
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2022-05-01
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Characterization of HPPD-inhibitor resistance in waterhemp (Amaranthus tuberculatus)
Waterhemp, a summer annual species native to much of the Midwest, has proven to be one of the toughest weeds for Illinois producers to control. Several characteristics of waterhemp make this species ideally suited to thrive in Illinois agricultural fields, including but not limited to high seed …
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Discovery, surveillance, and management of herbicide-resistant amaranthus spp
Amaranthus species are considered key driver weed species within Midwestern agricultural production systems. Herbicides are often relied upon for the control of Amaranthus spp. In recent years, herbicide resistance at multiple sites of action, such as 5-enolpyruvylshikimate-3-phosphate synthase …
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Investigation of oxidative stress responses in Amaranthus with colorimetric assays
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-12-01
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Herbicide strategies for Palmer amaranth (Amaranthus palmeri) management in Illinois
Palmer amaranth has been spreading from the southern United States into the Midwest, and the extent of damage this weed can inflict to Illinois row crops is not yet known. Palmer amaranth is known for rapid biomass accumulation and multiple emergence events, making this weed difficult to control. …
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Triazine resistance in Chenopodium album and Amaranthus hybridus in Virginia
… (Chenopodium album L.) and smooth pigweed (Amaranthus hybridus L.) in Virginia. Collections of seed were made from suspected triazine-resistant biotypes of common lambsquarters and smooth pigweed from counties in Virginia which had reported having triazine resistance problems. Triazine …
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Anticancer and antioxidant potential of Amaranthus cruentus protein and its hydrolysates
Submitted in complete fulfillment for the Degree of Master of Applied Sciences (Food Science and Technology) in the Department of Biotechnology and Food Technology, Durban University of Technology, Durban, South Africa, 2020.
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Alternative Herbicide Control Options for Glyphosate-Resistant Palmer Amaranth (Amaranthus Palmeri)
<p>The occurrence of glyphosate-resistant (GR) Palmer amaranth has prompted a shift in weed management strategies worldwide. Studies were conducted with the aim to (1) establish and compare the degree of tolerance of GR Palmer amaranth populations; (2) assess the efficacy of glufosinate, …
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Fitness costs of herbicide resistance traits in common waterhemp (Amaranthus tuberculatus)
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2018-05-01
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Characterization of a novel five-way-resistant population of waterhemp (Amaranthus tuberculatus)
Waterhemp [Amaranthus tuberculatus (Moq.) Sauer] is a dioecious summer annual species native to much of the Midwest. This species exhibits many intriguing characteristics including, but not limited to, obligate outcrossing that results in a high level of genetic diversity, prolific seed production, …
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Understanding the Interaction of Mesotrione and Atrazine in Redroot Pigweed (Amaranthus Retroflexus)
This dissertation covers an in-depth analysis on the interaction of mesotrione and atrazine and their impact on herbicide resistance stewardship and weed control efficacy. Mesotrione and atrazine are herbicides primarily used in corn, or maize. Herbicide resistance and a reduced number of new …
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Biochemical and molecular basis for metabolism-based atrazine resistance in Amaranthus tuberculatus
… populations of tall waterhemp (Amaranthus tuberculatus) from central Illinois (designated ACR and MCR) did not possess a point mutation in psbA (encoding the D1 protein, the target site for atrazine), but rapid production of atrazine-glutathione conjugates indicated that elevated …
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Stewarding chemical control in tall waterhemp (Amaranthus tuberculatus) while foregoing statistical significance
Tall waterhemp (Amaranthus tuberculatus) has become a considerable problem in U.S. agriculture, especially in corn and soy cropping systems. A particularly concerning characteristic of waterhemp is its ability to rapidly evolve resistance to herbicides. While chemical control is only one component …
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Population Genetics and Phylogenetic Context of Weed Evolution in the Genus Amaranthus: Amaranthaceae)
… In this dissertation, I used the genus <italic>Amaranthus</italic> to examine agricultural weed evolution over different evolutionary time scales, ranging from fitness measurements within a single species to a genus-wide, macroevolutionary analysis.</p><p>To explore the recent evolution of …
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The biology and management of Palmer amaranth (Amaranthus palmeri S. Wats) in Indiana
<p>Palmer amaranth is a pernicious summer annual weed that has evolved resistance to six herbicide sites of action in the U.S. and threatens agriculture production. In 2011, Palmer amaranth was identified in flood plains in two southern Indiana counties (Posey and Vanderburgh). Determining if …
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Development and Characterization of Microsatellite Markers for the Grain Amaranths (Amaranthus spp. L.)
The grain amaranths (Amaranthus hypochondriacus L., A. cruentus L., and A. caudatus L.) are important pseudocereals native to the Americas that have received increased attention for their nutritional content, specifically their balance of amino acids. The objective of this project was to produce …
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Management and Interference Potential of Common Waterhemp (Amaranthus Rudis) in Soybean (Glycine Max)
Field experiments were conducted during 1996, 1997, and 1998 to determine the common waterhemp interference period soybean could tolerate without reducing seed yield. Removal of common waterhemp interference 2 weeks after soybean unifoliolate expansion resulted in soybean seed yield equivalent to a …
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