Angela Williams

ORCID: 0000-0003-0196-0022
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About
Contact & Profiles
Research Areas
  • Plant Pathogens and Fungal Diseases
  • Plant Disease Resistance and Genetics
  • Mycotoxins in Agriculture and Food
  • Plant Pathogens and Resistance
  • Botanical Research and Chemistry
  • Fungal Biology and Applications
  • Plant-Microbe Interactions and Immunity
  • Wheat and Barley Genetics and Pathology
  • Legume Nitrogen Fixing Symbiosis
  • Plant and fungal interactions
  • Ruminant Nutrition and Digestive Physiology
  • Genetic and Environmental Crop Studies
  • Turfgrass Adaptation and Management
  • Genomics and Phylogenetic Studies
  • Mycorrhizal Fungi and Plant Interactions
  • Agronomic Practices and Intercropping Systems
  • Agricultural Science and Fertilization
  • Insect Resistance and Genetics
  • Entomopathogenic Microorganisms in Pest Control
  • Analytical Chemistry and Chromatography
  • Analytical chemistry methods development
  • Plant tissue culture and regeneration
  • Agricultural pest management studies
  • Plant pathogens and resistance mechanisms
  • Microbial Natural Products and Biosynthesis

Curtin University
2015-2024

Murdoch University
2006-2020

The University of Western Australia
2014-2016

Commonwealth Scientific and Industrial Research Organisation
2014-2016

Agriculture and Food
2016

Plant Industry
2014

RMIT University
2004

Aberystwyth University
2002-2003

Rhizoctonia solani is a soil-borne basidiomycete fungus with necrotrophic lifestyle which classified into fourteen reproductively incompatible anastomosis groups (AGs). One of these, AG8, devastating pathogen causing bare patch cereals, brassicas and legumes. R. multinucleate heterokaryon containing significant heterozygosity within single cell. This complexity posed challenges for the assembly its genome. We present high quality genome AG8 manually curated set 13,964 genes supported by...

10.1371/journal.pgen.1004281 article EN cc-by PLoS Genetics 2014-05-08

Soil-borne fungi of the Fusarium oxysporum species complex cause devastating wilt disease on many crops including legumes that supply human dietary protein needs across parts globe. We present and compare draft genome assemblies for three legume-infecting formae speciales (ff. spp.): F. f. sp. ciceris (Foc-38-1) pisi (Fop-37622), significant pathogens chickpea pea respectively, world's second third most important grain legumes, lastly medicaginis (Fom-5190a) which we developed a model legume...

10.1186/s12864-016-2486-8 article EN cc-by BMC Genomics 2016-03-05

Metarhizium anisopliae is an important fungal biocontrol agent of insect pests agricultural crops. Genomics can aid the successful commercialization biopesticides by identification key genes differentiating closely related species, selection virulent microbial isolates which are amenable to industrial scale production and formulation through reduction phenotypic variability. The genome isolate ARSEF23 was recently published as a model for M. anisopliae, however phylogenetic analysis has...

10.1186/1471-2164-15-660 article EN cc-by BMC Genomics 2014-01-01

The steadily increasing number of sequenced fungal and oomycete genomes has enabled detailed studies how these eukaryotic microbes infect plants cause devastating losses in food crops. During infection, pathogens secrete effector molecules which manipulate host plant cell processes to the pathogen's advantage. Proteinaceous effectors are synthesised intracellularly must be externalised interact with cells. Computational prediction secreted proteins from genomic sequences is an important...

10.3389/fpls.2015.01168 article EN cc-by Frontiers in Plant Science 2015-12-23

Pathogenic members of the Fusarium oxysporum species complex are responsible for vascular wilt disease on many important crops including legumes, where they can be one most destructive causing necrotrophic fungi. We previously developed a model legume-infecting pathosystem based reference legume Medicago truncatula and pathogenic F. forma specialis (f. sp.) medicaginis (Fom). To dissect molecular pathogenicity arsenal used by this root-infecting pathogen, we sequenced its transcriptome...

10.1186/s12864-016-3192-2 article EN cc-by BMC Genomics 2016-11-03

Parastagonospora nodorum, the causal agent of Septoria nodorum blotch (SNB), is an economically important pathogen wheat (Triticum spp.), and a model for study necrotrophic pathology genome evolution. The reference P. strain SN15 was first Dothideomycete with published sequence, has been used as basis comparison within between species. Here we present updated assembly corrections SNP indel errors in underlying from deep resequencing data well extensive manual annotation gene models using...

10.1371/journal.pone.0147221 article EN cc-by PLoS ONE 2016-02-03

• Medicago truncatula (barrel medic) has emerged as a model legume and accession A17 is the reference genotype selected for sequencing of genome. In present study we compare chromosomal configuration with that other accessions by examining pollen viability genetic maps intraspecific hybrids. Hybrids derived from crosses between M. accessions, representative large variation within germplasm collection, were evaluated using Alexander's stain. Genetic generated following crosses: SA27063 ×...

10.1111/j.1469-8137.2007.02039.x article EN New Phytologist 2007-03-07

Abstract Zymoseptoria tritici is a host-specific, necrotrophic pathogen of wheat. Infection by Z. characterized its extended latent period, which typically lasts 2 wks, and followed extensive host cell death, rapid proliferation fungal biomass. This work characterizes the level genomic variation in 13 isolates, for we have measured virulence on 11 wheat cultivars with differential resistance genes. Between reference isolate, IPO323, Australian isolates identified over 800,000 single...

10.1534/g3.115.025197 article EN cc-by G3 Genes Genomes Genetics 2016-03-08

Gene expression changes and metabolite abundances were measured during the interaction of Medicago truncatula with fungal necrotrophic pathogen Phoma medicaginis in leaf tissue susceptible resistant accessions. Over 330 genes differentially expressed plants infected P. relative to mock-inoculated at 12 h post-inoculation. Of these, 191 induced either or accession, 143 repressed. Expression observed involved oxidative burst, cell wall strengthening lipid metabolism, as well several...

10.1111/j.1364-3703.2011.00767.x article EN other-oa Molecular Plant Pathology 2012-01-03

Ascochyta rabiei is the causal organism of ascochyta blight chickpea and present in crops worldwide. Here we report release a high-quality PacBio genome assembly for Australian A. isolate ArME14. We compare ArME14 with an Illumina Indian isolate, ArD2. The has gapless sequences nine chromosomes telomere at both ends 13 large contig that extend to one telomere. total length was 40,927,385 bp, which 6.26 Mb longer than ArD2 assembly. Division by OcculterCut into GC-balanced AT-dominant...

10.1534/g3.120.401265 article EN cc-by G3 Genes Genomes Genetics 2020-04-29

ABSTRACT Bacillus thuringiensis has been widely used as a biopesticide for long time. Its molluscicidal activity, however, is rarely realized. Here, we report the genome sequence of B. strain DAR 81934, with activity against pest snail Cernuella virgata .

10.1128/genomea.00175-12 article EN cc-by Genome Announcements 2013-03-22

Ascochyta lentis causes ascochyta blight in lentil (Lens culinaris Medik.) and yield loss can be as high 50%. With careful agronomic management practices, fungicide use, advances breeding resistant varieties, disease severity impact to farmers have been largely controlled. However, evidence from major producing countries, Canada Australia, suggests that A. isolates change their virulence profile level of aggressiveness over time under different selection pressures. In this paper, we describe...

10.1093/g3journal/jkab006 article EN cc-by G3 Genes Genomes Genetics 2021-01-23

Abstract The dry matter (DM) production of Trifolium repens , T. ambiguum and the backcross 1 (BC1) 2 (BC2) hybrids with as recurrent parent were compared in mixtures an intermediate heading variety perennial ryegrass ( Lolium perenne L.) under a cutting‐only management over 3 harvest years. Plots parental legume species established from small plantlets oversown companion grass. In first year, DM yield clover plots was greater than that BC2 both BC1 plots, whilst second third years...

10.1046/j.1365-2494.2003.00354.x article EN Grass and Forage Science 2003-03-01

The polyketide-derived secondary metabolite ascochitine is produced by species in the Didymellaceae family, including but not restricted to Ascochyta pathogens of cool-season food legumes. Ascochitine structurally similar well-known mycotoxin citrinin and exhibits broad-spectrum phytotoxicity antimicrobial activities. Here, we identified a polyketide synthase (PKS) gene (denoted pksAC) responsible for production filamentous fungus fabae Deletion pksAC prevented its derivative ascochital A....

10.1128/msphere.00622-19 article EN cc-by mSphere 2019-09-24

Abstract The fungal species Parastagonospora nodorum is an important pathogen of wheat and model necrotroph with significant genomic resources. In this study, population-level pan-genome data for 173 P. isolates - 156 from the Western Australian (WA) wheat-belt, 17 internationally-sourced – were examined diversity pathogenicity effector gene content. A heterothallic core population was observed across all regions WA, asexually-reproducing clonal clusters in dryer northern regions. An...

10.21203/rs.3.rs-4080783/v1 preprint EN cc-by Research Square (Research Square) 2024-03-26
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