A5034906982- Botanical Studies and Applications
- Plant Taxonomy and Phylogenetics
- Cardiac and Coronary Surgery Techniques
- Horticultural and Viticultural Research
- Botany and Plant Ecology Studies
- Blood transfusion and management
- Cardiac, Anesthesia and Surgical Outcomes
- Plant and animal studies
- Trauma, Hemostasis, Coagulopathy, Resuscitation
- Plant Diversity and Evolution
- Venous Thromboembolism Diagnosis and Management
- Yeasts and Rust Fungi Studies
- Plant and Fungal Species Descriptions
- Ecology and Vegetation Dynamics Studies
- Botany, Ecology, and Taxonomy Studies
- Cardiac Arrest and Resuscitation
- Plant Pathogens and Fungal Diseases
- Forest Ecology and Biodiversity Studies
- Mycorrhizal Fungi and Plant Interactions
- Acute Kidney Injury Research
- Genetic diversity and population structure
- Mechanical Circulatory Support Devices
- Plant Parasitism and Resistance
- Species Distribution and Climate Change
- Fermentation and Sensory Analysis
Royal Ontario Museum
2012-2024
University of Toronto
2010-2024
Society of Thoracic Surgeons
2012-2024
Michigan Medicine
2019-2024
Mayo Clinic in Arizona
2016-2023
Mayo Clinic
2016-2023
University of Michigan
2012-2020
Medical University of South Carolina
2019-2020
Emory University
2019-2020
Westchester Medical Center
2020
Polyploidy and gametophytic apomixis are two important associated processes in plants. Many hawthorn species polyploids can reproduce both sexually apomictically. However, the population genetic structure of these is poorly understood. Crataegus douglasii represented exclusively by self-compatible tetraploid pseudogamous apomicts across North America, whereas suksdorfii found Pacific Northwest known to include self-incompatible diploid sexuals as well polyploid apomicts. We compare...
Premise of the study: Constructing complete, accurate plant DNA barcode reference libraries can be logistically challenging for large‐scale floras. Here we demonstrate promise and challenges using herbarium collections building a library vascular flora Canada. Methods: Our study examined 20,816 specimens representing 5076 5190 species in Canada (98%). For 98% specimens, at least one regions was recovered from plastid loci rbcL matK nuclear ITS2 region. We used beta regression to quantify...
One of the roles a professional society is to develop standards and guidelines practice as an instrument guide safe effective patient care. The American Society Extracorporeal Technology (AmSECT) first published its Essentials for Perfusion Practice, Clinical Function: Conduct Circulation in 1993. International Consortium Evidence-Based (ICEBP), committee within AmSECT, was tasked with updating this document 2010. aim report describe method development content AmSECT’s new guidelines. ICEBP...
The past decade has yielded more biodiversity observations from community science than the century of traditional scientific collection. This rapid influx data is promising for overcoming critical shortfalls, but we also have vast untapped resources held in undigitized natural history collections. Yet, ability these collections to fill gaps, especially compared against constant accumulation data, remains unclear. Here, compare how well (iNaturalist) and digitized herbarium specimens...
Polyploidy has been described both as an evolutionary dead end and a major engine of diversification for angiosperms. Two recent studies have found that genera with higher proportions polyploid species are more rich. Here, we investigate patterns polyploidy by performing traditional phylogenetically corrected analyses within the Rosaceae. We find is associated increased richness then differentiate between three alternative hypotheses this pattern: (1) herbaceous growth habit, trait in turn...
Hawthorns and medlars are closely related genera in Rosaceae subfamily Maloideae, whose taxonomy remains poorly understood. Gametophytic apomixis occurs polyploids, diploids sexual out-crossers, so ploidy level is of great interest, but suitable material for chromosome counts limited availability each year. The promise flow cytometry that it permits rapid measurement nuclear DNA amounts from most tissues, can be inferred if climatic taxonomic differences do not interfere. Our measurements...
ABSTRACT We describe forests from three areas of Jamaica, all on White Limestone but with markedly different rainfall regimes. The are Hog House Hill in the north-east lower montane rain forest at c. 450 m altitude a 4000 mm yr −1 ; Broom Hall centre island evergreen seasonal 670 and 1600 marked dry season; Round near south coast semi-evergreen 300 an irregularly distributed 1000 . Species lists were made 180 ha Hill, 5 50 detailed inventories five sample sites 2 , two one Hill. At we listed...
Summary Apomixis in Crataegus is primarily aposporous and requires pollination. The embryo sac of the Polygonum type. A combination meiotically unreduced sacs with apparently reduced pollen would violate usual requirement for a 2 : 1 ratio maternal to paternal contributions endosperm. We therefore investigated origin endosperm seeds sexual diploids apomictic polyploids sister genera Mespilus . Flow‐cytometric DNA measurements from mature were converted ploidy levels using leaf‐tissue...
Maloids are versatile in reproductive mode-vegetative spreading, self-incompati- bility, self-compatibility, and apomixis all occur-and they engage extensive hybridization polyploidy. Naturally occurring gametophytic has been reported from almost 100 taxa six genera-Aronia, Amelanchier, Cotoneaster, Crataegus, Malus, Sorbus s.l. Generally maloids is facultative, aposporous, pseudogamous, characterized by a distinctive multiplicity of megagametophytes per ovule. Unlike their sexual relatives...
Summary Methods for shape comparisons among groups originally developed in zoological studies are found to be useful examining variation leaf shape. These methods (sampling outlines by means of truss networks connecting landmarks or pseudolandmarks, and sheared principal components analysis) take advantage electronic data capture multivariate analysis. They have the desirable properties discriminating between size, permitting their results related directly original measurements from which...
Polyploidy plays a prominent role in the speciation process plants. Many species are known to be part of agamic complexes comprising sexual diploids and more or less exclusively asexual polyploids. However, polyploid formation has been studied very few cases, primarily because challenges examining these cases phylogenetically. In this study, we demonstrate use variety phylogenetic approaches unravel origins infer reticulation history diploid–polyploid complex black-fruited Crataegus. The...