A5052918007- Plant Pathogens and Fungal Diseases
- Mycorrhizal Fungi and Plant Interactions
- Forest Ecology and Biodiversity Studies
- Yeasts and Rust Fungi Studies
- Plant Pathogens and Resistance
- Plant Physiology and Cultivation Studies
- Fungal Biology and Applications
- Plant Disease Resistance and Genetics
- Plant Pathogenic Bacteria Studies
- Plant and Fungal Interactions Research
- Mycotoxins in Agriculture and Food
- Lichen and fungal ecology
- Wheat and Barley Genetics and Pathology
- Horticultural and Viticultural Research
- Banana Cultivation and Research
- Plant and animal studies
- Plant Virus Research Studies
- Plant-Microbe Interactions and Immunity
- Flowering Plant Growth and Cultivation
- Turfgrass Adaptation and Management
- Ecology and Vegetation Dynamics Studies
- Phytoplasmas and Hemiptera pathogens
- Plant and fungal interactions
- Plant pathogens and resistance mechanisms
- Evolution and Genetic Dynamics
University of California, Riverside
2010-2024
Plant (United States)
2015-2016
University of California, Davis
2002-2007
University of California, Berkeley
2005
University of California System
2005
University of California, Irvine
2005
Washington State University
2001-2002
• Quercus woodlands are key components of California's wild landscapes, yet little is known about ectomycorrhizal (EM) fungi in these ecosystems. We examined the EM community associated with douglasii using sporocarp surveys and by pooling roots subjecting them to DNA extraction, polymerase chain reaction (PCR), cloning, restriction fragment length polymorphism (RFLP) screening sequencing. Ectomycorrhizal root symbionts were sampled four times 2003–04. During this time, below-ground...
• Cenococcum geophilum is a widely distributed mycorrhizal species associated with diverse gymnosperm and angiosperm hosts. In previous studies, significant amount of genetic genotypic diversity has been detected in this species, despite the fact that C. not thought to reproduce by meiotic or mitotic spores. We conducted phylogenetic analysis 103 isolates from California oak woodland seven non-California using glyceraldehyde 3-phosphate dehydrogenase gene. addition, subset was analyzed...
Arguably more mycophiles hunt true morels (Morchella) during their brief fruiting season each spring in the northern hemisphere than any other wild edible fungus. Concerns about overharvesting by individual collectors and commercial enterprises make it essential that science-based management practices conservation policies are developed to ensure sustainability of harvests protect preserve morel species diversity. Therefore, primary objectives present study were to: (i) investigate utility...
Abstract Claviceps purpurea is an important pathogen of grasses and source novel chemical compounds. Three groups within this species (G1, G2 G3) have been recognized based on habitat association, sclerotia conidia morphology, as well alkaloid production. These further supported by Random Amplification Polymorphic DNA (RAPD) amplified fragment length polymorphism (AFLP) markers, suggesting may be more accurately described a complex. However, all divergent ecotypes can coexist in sympatric...
Cenococcum is a genus of ectomycorrhizal Ascomycota that has broad host range and geographic distribution. It not known to produce either meiotic or mitotic spores exist only in the form hyphae, sclerotia host-colonized root tips. Due its lack sexual asexual reproductive structures, it proven difficult incorporate into traditional classification within Ascomycota. Molecular phylogenetic studies ribosomal RNA placed Dothideomycetes, but definitive identification closely related taxa remained...
Rapid responses of microbial biomass and community composition following a precipitation event have been reported for soil bacteria fungi, but measurements characterizing ectomycorrhizal fungi remain limited. The response after is crucial to understanding biogeochemical cycles plant nutrition. Here, we examined changes in formation, diversity, at the end summer drought events conifer-oak mixed forest under semiarid, Mediterranean-type climate CA, USA. To study effects different amounts...
Summary Russula brevipes is common ectomycorrhizal (EM) fungus that associated with several hosts across temperate forest ecosystems. A previous study has demonstrated substructuring large geographic distances (1500 km) occurs in the western USA. To examine genetic structure over a more localized scale, basidiocarps of from three subpopulations, separated by 230–1090 m, were collected two consecutive years an oak/pine woodland. Microsatellite loci used to test for population differentiation...
Waitea circinata var. was identified as the causal agent of a new disease annual bluegrass (Poa annua) in United States. This pathogen is also known to cause brown ring patch on creeping bentgrass (Agrostis stolonifera) Japan, but it had not been reported any turf species outside Japan. Symptoms caused by this fungus included regular irregular yellow rings several centimeters 1 m diameter, typically at maximum daytime temperatures 15 35°C. A total 26 isolates were collected from diseased...
AbstractCenococcum geophilum is perhaps the most widely distributed and recognized ectomycorrhizal fungus with a host range of more than 200 tree species from 40 genera both angiosperms gymnosperms. We conducted phylogenetic analysis on large collection isolates (n = 74) North America Europe based glyceraldehyde 3-phosphate dehydrogenase (gpd). A subset 22) also was analyzed conservative LSU-rDNA locus. Significant nucleotide diversity detected (∼ 20%) in gpd region supported that C. studied...
• Investigating the dispersal of root-pathogenic fungus Armillaria mellea is necessary to understand its population biology. Such an investigation complicated by both subterranean habit and persistence genotypes over successive host generations. As such, colonization resident mycelia thought outcompete spore infections. We evaluated contributions mycelium spores examining a site in which hosts pre-date A. mellea. Golden Gate Park (San Francisco, CA, USA) was established 1872 primarily on...
Phytophthora root rot (PRR) of avocado (Persea americana), caused by cinnamomi, is the most serious disease worldwide. Previous studies have determined that this pathogen exhibits a primarily clonal reproductive mode but no population level been conducted in avocado-growing regions California. Therefore, we used amplified fragment length polymorphism based on 22 polymorphic loci and mating type to investigate diversity from 138 isolates collected 2009 2010 15 groves Northern Southern...
The ectomycorrhizal fungus Cenococcum geophilum (Ascomycota, Dothideomycetes) forms black, round to irregular sclerotia in forest soils. Fungi that colonize the appear affect viability and may play an important role life history of Cenococcum. Some fungi could also nutrient cycling by decomposing sclerotia, which are melanized recalcitrant decay. We used a culture-based method document fungal communities growing inside surface-sterilized were collected from was successfully isolated 297 971...
Abstract Population genetic structure of the fungal wheat pathogen Tapesia yallunda e in Washington State was determined using genetically characterized amplified fragment length polymorphic (AFLP) markers and mating‐type ( MAT 1‐1 or 1‐2). Segregation linkage relationships among 164 AFLP were analysed 59 progeny derived from an vitro cross . Alleles at 158 loci locus segregated a 1:1 ratio. Ten unlinked chosen to determine genotypic diversity test hypothesis random mating population...
Garlic is an important crop cultivated worldwide and several different viruses have been associated with propagative material. propagated from bulbs and/or vegetative topsets of the inflorescences known as bulbils. The effects geographic origin type material on phylogenetic relationships genetic variability coat protein genes four allium are presented here. Onion yellow dwarf virus (OYDV), Leek stripe (LYSV), X (GVX), common latent (GCLV) were detected in single mixed infections plants grown...
Hylocereus (Berger) Britton and Rose Selenicereus are two genera of vine cacti, commonly named pitahaya, that produce fruit gaining in popularity as an exotic many countries. There has also been increasing interest these fruits because they can be grown areas prone to drought heat where other production is not possible. However, there significant taxonomic confusion regarding species within well some uncertainty among varieties. Amplified fragment length polymorphism (AFLP) was used genotype...