A5071137459- Plant Pathogens and Resistance
- Plant Pathogens and Fungal Diseases
- Yeasts and Rust Fungi Studies
- Plant Disease Resistance and Genetics
- Mycorrhizal Fungi and Plant Interactions
- Infectious Diseases and Mycology
- Peanut Plant Research Studies
- Genomics and Phylogenetic Studies
- Powdery Mildew Fungal Diseases
- Garlic and Onion Studies
- Agriculture, Plant Science, Crop Management
- Lichen and fungal ecology
- Turfgrass Adaptation and Management
- Cocoa and Sweet Potato Agronomy
- Plant Disease Management Techniques
- Fungal Plant Pathogen Control
- Plant-Microbe Interactions and Immunity
Animal and Plant Health Inspection Service
2008-2023
United States Department of Agriculture
2008-2022
Beltsville Agricultural Research Center
2020
North Carolina State University
1997-1998
With the increased attention given to genus Phytophthora in last decade response ecological and economic impact of several invasive species (such as P. ramorum, kernoviae, alni), there has been a significant increase number described species. In part, this is due extensive surveys historically underexplored ecosystems (e.g., forest stream ecosystems) undertaken determine spread involvement decline worldwide oak decline). The past seen an approximate doubling within Phytophthora, will likely...
Novel species of fungi described in this study include those from various countries as follows: Antarctica , Cladosporium arenosum marine sediment sand. Argentina Kosmimatamyces alatophylus (incl. gen. nov.) soil. Australia Aspergillus banksianus kumbius luteorubrus malvicolor and nanangensis soil, Erysiphe medicaginis leaves Medicago polymorpha Hymenotorrendiella communis on leaf litter Eucalyptus bicostata Lactifluus albopicri austropiperatus Macalpinomyces collinsiae Eriachne benthamii...
Many members of the
The genus Phytopythium (Peronosporales) has been described, but a complete circumscription not yet presented.In the present paper we provide molecular-based evidence that members of Pythium clade K as described by Lévesque & de Cock (2004) belong to Phytopythium.Maximum likelihood and Bayesian phylogenetic analysis nuclear ribosomal DNA (LSU SSU) mitochondrial cytochrome oxidase subunit 1 (COI) well statistical analyses pairwise distances strongly support status separate entity.Phytopythium...
Novel species of fungi described in this study include those from various countries as follows: Algeria, Phaeoacremonium adelophialidum Vitis vinifera.Antarctica, Comoclathris antarctica soil. Australia, Coniochaeta salicifolia endophyte healthy leaves Geijera salicifolia, Eremothecium peggii fruit Citrus australis, Microdochium ratticaudae stem Sporobolus natalensis, Neocelosporium corymbiae on stems Corymbia variegata, Phytophthora kelmanii rhizosphere soil Ptilotus pyramidatus,...
Phytophthora, with 203 species, is a genus of high importance in agriculture worldwide. Here, we present the online resource "IDphy", developed to facilitate correct identification species Phytophthora using type specimens from original descriptions wherever possible. IDphy emphasizes economic impact and regulatory concern for United States. presents an interactive Lucid key tabular 161 culturable described as May 2018, including 141 ex-types 20 well-authenticated specimens. contains...
A non-papillate, heterothallic Phytophthora species first isolated in 2001 and subsequently from symptomatic roots, crowns stems of 33 plant 25 unrelated botanical families 13 countries is formally described here as a new species. Symptoms on various hosts included crown stem rot, chlorosis, wilting, leaf blight, cankers gumming. This was Australia, Hungary, Israel, Italy, Japan, the Netherlands, Norway, South Africa, Spain, Taiwan, Turkey, United Kingdom States association with shrubs...
Phytophthora is a long-established, well known and globally important genus of plant pathogens. Phylogenetic evidence has shown that the biologically distinct, obligate biotrophic downy mildews evolved from at least twice. Since, cladistically, this renders ‘paraphyletic’, it been proposed evolutionary clades be split into multiple genera (Runge et al. 2011; Crous 2021; Thines 2023; 2024). In letter, we review arguments for retention generic name with broad circumscription made by Brasier...
Thirty-three Pythium spp. were obtained from roots and crowns of bentgrass other turfgrass species with symptoms root crown rot. The predominant recovered P. arrhenomanes, catenulatum, intermedium, oligandrum, periilum, torulosum, vanterpoolii. complexes two or more the same tissue sample common. catenulatum which made up 58% total isolates, most frequently found in combination Pythium. Pathogenicity all was analyzed pre- postemergence inoculation tests. Tests conducted on seedlings creeping...
A homothallic semipapillate slow growing Phytophthora species associated with root rot of strawberries from greenhouse-grown plants in North Carolina, USA, roses the Netherlands, and raspberry Knoxfield, Australia, was identified. The main character this organism is production paragynous antheridia broad attachment to oogonial wall. morphology pathogen does not match that any more than 85 described species. Phylogenetic analysis based on sequences internal transcribed spacer rDNA region...
Fungi in the genus Monilinia cause brown rot disease of stone and pome fruits. Here, we report draft genome assemblies four important phytopathogenic species: M. fructicola, fructigena, polystroma, laxa. The were 39 Mb (M. fructigena), 42 laxa), 43 fructicola), 45 polystroma) with as few 550 contigs laxa). These are first resources publicly available for laxa, polystroma.
A homothallic, papillate Phytophthora species causing foliar and fruit blight of noni (Morinda citrifolia var. citrifolia) in Hawaii was identified. The asexual phase this is characterized by the production umbellate sporangiophores sporangia that are ellipsoid obpyriform with conspicuously tapered bases possess caducous, medium to long pedicels. sexual oogonia bases, small amphigynous antheridia thick-walled, plerotic oospores. morphology taxon does not match any valid 95 described date....
A root rot disease of cultivated tobacco called yellow stunt has been observed in the burley production areas Brazil since early 1990s. Root infecting fungi and straminipiles were isolated from roots diseased plants, including a semi-papillate, homothallic, slow growing Phytophthora species. Pathogenicity trials confirmed that sp. caused stunting flue-cured tobaccos. Morphological characteristics asexual sexual stages this organism did not match any reported species very different widely...
Pod rot diseases historically caused significant losses in peanut production North Carolina. Advances the understanding of pod and changes cultural practices minimized years since 1979. By early 1990s, however, some growers began to observe that apparently was not associated with infection by common soilborne pathogens. Incidence also high research plots used study conservation tillage methods. Selected farms were surveyed fall 1994, 1995, 1996 identify fungi symptoms Over three study, more...
A homothallic semipapillate slow growing Phytophthora species associated with root rot of strawberries from greenhouse-grown plants in North Carolina, USA, roses the Netherlands, and raspberry Knoxfield, Australia, was identified. The main character this organism is production paragynous antheridia broad attachment to oogonial wall. morphology pathogen does not match that any more than 85 described species. Phylogenetic analysis based on sequences internal transcribed spacer rDNA region...
Phytophthora ramorum, P. kernoviae, and melonis are each species of current regulatory concern in the United States, Kingdom, other areas world. Ex-type material cultures duplicates type that was used to describe deposited additional culture collections. Using these specimens as references is essential designing correct molecular identification diagnostic systems. Here, we report a whole genome sequence for generated using high-throughput sequencing via MinION third generation platform from...
The pathogenicity of Pythium vexans isolates collected from fir samples with typical root rot symptoms in North Carolina was evaluated on Fraser seedlings (Abies fraseri). Two replicated trials involving seven treatments were conducted the lath house and greenhouse. Although P. examined these able to colonize systems, they did not cause mortality or incite symptoms. In comparison, Phytophthora cinnamomi, a known aggressive pathogen fir, caused severe all plants. These experiments provided no...
Phytophthora is one of the most important genera plant pathogens, with many members causing high economic losses worldwide. To build robust molecular identification systems, it very to have information from well-authenticated specimens and, in preference, ex-type specimens. The reference genomes form a critical foundation for genetics, biological research, and diagnostic applications. In this study, we describe four draft genome resources citricola BL34 (P0716 WPC) (118 contigs 50 Mb), P....