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Showing 1 to 20 of 22 for “"Astragalus"”.
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Beneficial Fungal Interactions Resulting in Accelerated Germination of Astragalus utahensis, a Hard-Seeded Legume
… native plants including the subject species, Astragalus utahensis, have evolved mechanisms to control germination in order to maintain a seed bank and ensure germination at the right time under optimal conditions. In vitro germination studies confirm beneficial interactions between Alternaria …
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The Ecology and Evolution of Rare, Soil Specialist Astragalus Plants in the Arid Western U.S.
… plants in the genus <em>Astragalus</em> (Fabaceae). These plants are disproportionately likely to be rare and of conservation concern. Thus, I optimized germination pretreatments for <em>Astragalus</em> species such that seed loss can be minimized during <em>ex situ</em> …
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Quantifying the Diversity of Agronomic Traits of Cicer Milkvetch (Astragalus cicer L.) Germplasm Collections Using UAV-Based Imagery
Cicer milkvetch (Astragalus cicer L.) is a non-bloat perennial forage legume well suited for stockpile grazing because of its persistence, high late season quality and yield in the moist areas of the Canadian Prairies. Remote sensing via unmanned aerial vehicles (UAV) has the potential to …
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Seasonal Variation in Swainsonine and Endophyte Concentrations of Undifilum oxytropis in Different Plant Parts of Oxytropis sericea
Abstract: Locoweeds (Astragalus and Oxytropis spp.) are widely distributed in the rangelands of the western United States. The primary toxin present in locoweeds is identified as the alkaloid swainsonine. The consumption of locoweeds by domesticated cattle, sheep, and horses leads to significant …
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Ecomorphological and Ecometric Approaches to Clarifying Homo sapiens Palaeoecology
… and novel palaeoecological methods - bovid astragalus ecomorphology and dental ecometrics - to bring new and added perspectives on the ecological and environmental context in which Homo sapiens and other hominin relatives evolved. Ecomorphology is initially used to create models capable of …
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ZOOARCHAEOLOGICAL MEASURES OF RESOURCE INTENSIFICATION AND DEPLETION: EXAMPLES FROM EASTERN NORTH AMERICA
… weight based on osteological measurements of the astragalus, and determining raccoon sex based on canine tooth measurements. Combined examination of the age and size parameters of deer over time indicates that the population density and distribution of deer in the Late Prehistoric period is …
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Chemical and molecular analysis of Libyan desert plants used in camel feed
… chemical composition of Rhanterium epapposum, Astragalus spinosus, Tamarix aphylla and Citrullus colocynthus -desert plants used commonly in camel fodder, which may be a source of therapeutically active compounds that could be transferred to camel body fluids. Plants were investigated …
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The influence of intraspecific variation in host plants on arthropod and fungal endophyte communities
… endophyte communities in spotted locoweed (Astragalus lentiginosus). Finally, in Chapter Four, I return to alfalfa to ask which plant traits affect the diversity of arthropods and foliar fungi at small spatial scales. Each chapter provides evidence for the filtering effect of plant …
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Plant-Soil Feedback and Perennial Forage Systems
… were more persistent than the native legume Astragalus canadensis. Harvest frequency altered these trends: twice-per-year harvests reduced non-native dominance and benefited A. canadensis, while single harvests favored grasses but accelerated A. canadensis decline. In the greenhouse, PSF …
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Causes and consequences of prolonged dormancy: Why stay belowground?
… dormancy in a long lived perennial herb, <italic>Astragalus scaphoides</italic>.</p> <p>First, I use a combination of demography and ecophysiology to study the proximate mechanisms associated with prolonged dormancy. Analysis of a long-term demographic dataset indicates that both endogenous …
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Causes and consequences of prolonged dormancy: Why stay belowground?
… dormancy in a long lived perennial herb, <italic>Astragalus scaphoides</italic>.</p> <p>First, I use a combination of demography and ecophysiology to study the proximate mechanisms associated with prolonged dormancy. Analysis of a long-term demographic dataset indicates that both endogenous …
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Mammalian Postcranial Evolution and Primate Extinction in the Middle Eocene of North America
… these groups,: 2) identify measurements of the astragalus and distal humerus that consistently discriminate open-country from closed-country taxa in a diverse sample of modern mammals, and: 3) apply the astragalar measurements to a sample of artiodactyl astragali from the Uinta Formation to …
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Systematics, Specificity, and Ecology of New Zealand Rhizobia
… specificity and could nodulate an exotic legume Astragalus (milk vetch), but not the invasive weed legumes. Rhizobium leguminosarum was also found to nodulate native legumes, albeit ineffectively. The exotic invasive woody legumes of this study were nodulated by diverse Bradyrhizobium spp. that …
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Establishment, Forage Production and Drought Resistance of Native Perennial Legumes of the Canadian Prairies
… Field research on four native legume species (Astragalus flexuosus, Dalea purpurea, Hedysarum boreale and Vicia americana) evaluated their establishment and early vs. late season forage production in monoculture, and in mixtures with Bromus riparius, in the Brown and Dark Brown soil zones of …
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Efecto de la humedad edáfica sobre aspectos morfológicos y funcionales de tres leguminosas patagónicas relativos a su uso y conservación
… de déficit hídrico. Las poblaciones naturales de Astragalus cruckshanksii (Hook. et Arn.) Griseb., Glycyrrhiza astragalina Gillies ex Hooker et Arnott y Adesmia lotoides Hook.f., vegetan en distintas localidades de la Provincia Fitogeográfica Patagónica donde se colectó semillas y suelo …
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Advancing UAV-Based Remote Sensing and Machine Learning for Ecological Monitoring, Habitat Disturbance Detection, and Forensic Science in Arid Landscapes
… plants of the endangered Peirson's milkvetch (Astragalus magdalenae var. peirsonii) (PMV) within the Algodones Dunes, California. In chapter two, we use UAV imagery and innovative computer vision analyses to detect OHV tracks that disrupt fragile dune ecosystems; such modeling is crucial for …
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