A5012580260- Plant Pathogens and Fungal Diseases
- Mycorrhizal Fungi and Plant Interactions
- Banana Cultivation and Research
- Forest Insect Ecology and Management
- Hemiptera Insect Studies
- Mycotoxins in Agriculture and Food
- Plant-Microbe Interactions and Immunity
- Genomics and Phylogenetic Studies
- Plant Virus Research Studies
- Insect-Plant Interactions and Control
- Research on scale insects
- Insects and Parasite Interactions
- Plant Disease Resistance and Genetics
- Insect and Arachnid Ecology and Behavior
- Fungal Biology and Applications
- Yeasts and Rust Fungi Studies
- Plant and animal studies
- Lepidoptera: Biology and Taxonomy
- Fungal Plant Pathogen Control
- Plant Pathogenic Bacteria Studies
- Mining Techniques and Economics
- Psychological Treatments and Assessments
- Genetics and Plant Breeding
- Insect symbiosis and bacterial influences
- Nematode management and characterization studies
University of Pretoria
2016-2025
Forestry and Agricultural Biotechnology Institute
2024
University of Johannesburg
2011-2013
Fusarium circinatum, the causal agent of pine pitch canker (PPC), is currently one most important threats Pinus spp. globally. This pathogen known in many pine-growing regions, including natural and planted forests, can affect all life stages trees, from emerging seedlings to mature trees. Despite importance PPC, global distribution F. circinatum poorly documented, this problem also true hosts within countries that are affected. The aim study was review with a particular focus on Europe. We...
Scientific communication is facilitated by a data-driven, scientifically sound taxonomy that considers the end-user's needs and established successful practice. In 2013, Fusarium community voiced near unanimous support for concept of represented clade comprising all agriculturally clinically important species, including F. solani species complex (FSSC). Subsequently, this was challenged in 2015 one research group who proposed dividing genus into seven genera, FSSC described as members...
ABSTRACT Fusarium oxysporum f. sp. cubense , the causal agent of fusarium wilt banana ( Musa spp.), is one most destructive strains vascular fungus F. . Genetic relatedness among and within vegetative compatibility groups (VCGs) was studied by sequencing two nuclear mitochondrial DNA regions in a collection 70 isolates that include representatives 20 VCGs other formae speciales, nonpathogens. To determine ability to sexually recombine, crosses were made between opposite mating types....
Fusarium oxysporum formae specialis cubense (Foc) is a soil-borne fungus that causes wilt, which considered to be the most destructive disease of bananas. The believed have evolved with its host in Indo-Malayan region, and from there it was spread other banana-growing areas infected planting material. diversity distribution Foc Asia investigated. A total 594 F. isolates collected ten Asian countries were identified by vegetative compatibility groups (VCGs) analysis. To simplify...
Botryosphaeria lutea (anamorph Fusicoccum luteum) most easily is distinguished from other spp. by a yellow pigment that formed in young cultures. This fungus has been reported number of cultivated hosts New Zealand and Portugal. During survey fungi occur on native Acacia species Australia, was observed some These isolates were morphologically similar to B. lutea, but the differed slightly one authentic isolates. Preliminary data also revealed small differences ITS rDNA sequence data. The aim...
Some of the most significant breakthroughs in biological sciences this century will emerge from development next generation sequencing technologies. The ease availability DNA sequence made possible through these new technologies has given researchers opportunities to study organisms a manner that was not with Sanger sequencing. Scientists will, therefore, need embrace genomics, as well develop and nurture human capacity genomes utilise 'tsunami' data genome In response challenges, we...
The genomes of Chrysoporthe austroafricana, Diplodia scrobiculata, Fusarium nygami, Leptographium lundbergii, Limonomyces culmigenus, Stagonosporopsis tanaceti, and Thielaviopsis punctulata are presented in this genome announcement. These seven from endophytes, plant pathogens economically important fungal species. sizes range 26.6 Mb the case lundbergii to 44 for austroafricana. availability these data will provide opportunities resolve longstanding questions regarding taxonomy species...
Fusarium circinatum is a highly virulent invasive pathogen that causes the disease commonly known as pine pitch canker ( PPC ). On mature trees, most common symptoms of include resin bleeding, resinous cankers, wilting needles and dieback. In nurseries main are yellowish needles, foliage shoots. considered one important diseases conifers globally at least 60 species Pinus along with Pseudotsuga menziesii to be susceptible. Quarantine regulations crucial minimize risk new introductions into...
The genomes of Cercospora zeina, Fusarium pininemorale, Hawksworthiomyces lignivorus, Huntiella decipiens, and Ophiostoma ips are presented in this genome announcement. Three these from plant pathogens otherwise economically important fungal species. pininemorale H. decipiens not known to cause significant disease but closely related species economic importance. sizes range 25.99 Mb the case O. 4.82 for lignivorus. These include first reports a genus Hawksworthiomyces. availability data will...
example, Sipos et al. (2017) showed that genome evolution in the genus was predominantly caused by gene family expansion.Kolesnikova (2019) assembled complete mitochondrial genomes of A. borealis, gallica, sinapina, and solidipes found a high degree variation size, content genomic organization among these phylogenetically closely related species.Recently, first chromosome-level Armillaria assembly became available, revealing genome-wide recombination ostoyae (Heinzelmann 2020).Sequenced...
This is a genome announacment there no abstract
ABSTRACT Species in the Botryosphaeriaceae are common endophytic microbiome of woody plants. Some these well known to cause branch die‐back and decline macadamia trees have also been associated with diseases their fruits leaves. The aim this study was characterise species from asymptomatic symptomatic tissues fruits, leaves racemes South Africa. Symptomatic included racemes, husk rot on brown leaf blight. Eleven were identified based analysis DNA sequence data for rDNA internal transcribed...
Botryosphaeria lutea (anamorph Fusicoccum luteum) most easily is distinguished from other spp. by a yellow pigment that formed in young cultures. This fungus has been reported number of cultivated hosts New Zealand and Portugal. During survey fungi occur on native Acacia species Australia, was observed some These isolates were morphologically similar to B. lutea, but the differed slightly one authentic isolates. Preliminary data also revealed small differences ITS rDNA sequence data. The aim...
The availability of mitochondrial genomes has allowed for the resolution numerous questions regarding evolutionary history fungi and other eukaryotes. In Gibberella fujikuroi species complex, exact relationships among so-called "African", "Asian" "American" Clades remain largely unresolved, irrespective markers employed. this study, we considered feasibility using genes to infer phylogenetic Fusarium in complex. representatives three (Fusarium circinatum, F. verticillioides fujikuroi) were...
The pitch canker pathogen, Fusarium circinatum, has major impacts on production in pine nurseries and plantations South Africa. Thus far, efforts to reduce local spread have focused rouging of infected pines sanitation eliminate sources inoculum. Although the host range F. circinatum was thought be limited Douglas-fir, recent studies California indicate that this fungus is capable infecting grasses as a symptomless endophyte. Consequently, it possible represent reservoir inoculum influences...
Knowledge of the biology a pest is essential for building sustainable management programmes. Pentatomidae have hemimetabolous life cycle with egg, nymphal, and adult stages, which differ in morphological, ecological, behavioural traits. Some these traits, such as mating behaviour, pheromones (alarm aggregation pheromones) acquisition gut symbionts can be targeted strategies. Here, we review available literature on history traits potential use Pheromone-mediated disruption symbiont are two...
The Gibberella fujikuroi complex includes many Fusarium species that cause significant losses in yield and quality of agricultural forestry crops. Due to their economic importance, whole-genome sequence information has rapidly become available for including circinatum, verticillioides, each which represent one the three main clades known this complex. However, no previous studies have explored genomic commonalities differences among these fungi. In study, a previously completed genetic...
Abstract Fusarium circinatum is a harmful pathogenic fungus mostly attacking Pinus species and also Pseudotsuga menziesii , causing cankers in trees of all ages, damping-off seedlings, mortality cuttings mother plants for clonal production. This listed as quarantine pest several parts the world trade potentially contaminated pine material such cuttings, seedlings or seeds restricted order to prevent its spread disease-free areas. Inspection plant often relies on DNA testing conventional...
The Fusarium fujikuroi species complex (FFSC) is an economically important monophyletic lineage in the genus Fusarium. Incongruence observed among mitochondrial gene trees, as well multiple non-orthologous copies of internal transcribed spacer region ribosomal RNA genes, suggests that origin and history this likely involved interspecies flow. Based on hypothesis, genomes non-conspecific should harbour signatures introgression or introgressive hybridization. aim study was therefore to search...
Fusarium circinatum Nirenberg & O’Donnel is listed among the species recommended for regulation as quarantine pests in Europe. Over 60 Pinus are susceptible to pathogen and it also causes disease on Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) genera such Picea Larix. The European Food Safety Authority considers probability of new introductions—via contaminated seeds, wood material, soil growing substrates, natural means human activities—into EU very likely. Due early detection,...
Stink bug species (Pentatomoidea superfamily) have developed an interdependence with obligate bacterial gut symbionts in specialized midgut crypts (M4 sub-region). Species of the Enterobacteriaceae family (predominantly Pantoea) are vertically transferred to their offspring and provide nutrients that cannot be obtained from plant sap food sources. However, bacteria other compartments stink bugs rarely been investigated. The two-spotted bug, Bathycoelia distincta, is a serious pest macadamias...