A5103239420- Plant and fungal interactions
- Botanical Research and Chemistry
- Nematode management and characterization studies
- Wheat and Barley Genetics and Pathology
- Plant pathogens and resistance mechanisms
- Legume Nitrogen Fixing Symbiosis
- Plant-Microbe Interactions and Immunity
- Bioenergy crop production and management
- Mycorrhizal Fungi and Plant Interactions
- Plant nutrient uptake and metabolism
- Plant responses to water stress
- Polysaccharides and Plant Cell Walls
- Plant tissue culture and regeneration
- Ubiquitin and proteasome pathways
- Plant Toxicity and Pharmacological Properties
- Plant Pathogens and Resistance
- Plant Parasitism and Resistance
- Horticultural and Viticultural Research
- Plant Reproductive Biology
- Plant responses to elevated CO2
National Institute of Agricultural Botany
2013-2024
University of Warwick
2005
The perception of downy mildew avirulence (Arabidopsis thaliana Recognized [ATR]) gene products by matching Arabidopsis resistance (Recognition Peronospora parasitica [RPP]) triggers localized cell death (a hypersensitive response) in the host plant, and this inhibits pathogen development. oomycete pathogen, therefore, is under selection pressure to alter form these prevent detection. That maintains genes indicates that they play a positive role survival. Despite significant progress cloning...
The fungal family Clavicipitaceae includes plant symbionts and parasites that produce several psychoactive bioprotective alkaloids. grass in the epichloae clade (Epichloë Neotyphodium species), which are extraordinarily diverse both their host interactions alkaloid profiles. Epichloae alkaloids of four distinct classes, all deter insects, some—including infamous ergot alkaloids—have potent effects on mammals. exceptional chemotypic diversity may relate to broad range interactions, whereby...
Pattern recognition receptors (PRRs) belonging to the multigene family of receptor-like kinases (RLKs) are sensing devices plants for microbe- or pathogen-associated molecular patterns released from microbial organisms. Here we describe Rnr8 (for Required non-host resistance 8) encoding HvLEMK1, a LRR-malectin domain-containing transmembrane RLK that mediates barley non-adapted wheat powdery mildew fungus Blumeria graminis f.sp. tritici. Transgenic lines with silenced HvLEMK1 allow entry and...
To date, a small number of major flowering time loci have been identified in the related Triticeae crops, bread wheat (Triticum aestivum), durum (T. durum), and barley (Hordeum vulgare). Natural genetic variants at these result phenotypic changes which adapted crops to novel environments encountered during spread agriculture. The polyploid nature means that recessive alleles confer adaptive advantage diploid species not readily identified. One such example is PPD-H2 locus encoded by...
Four QTL for ergot resistance (causal pathogen Claviceps purpurea) have been identified in the durum wheat cultivar Greenshank. purpurea is a of grasses that infects flowers, replacing seed with an sclerotium. Ergot presents significant problem to rye, barley and wheat, particular hybrid production systems. In addition, there evidence highly toxic alkaloids accumulate within sclerotia can cross-contaminate otherwise healthy grain. Host C. rare, few loci having identified. this study, four...
Ergot of cereals, caused by Claviceps purpurea, results in yield loss and downgrading infested grain because toxic alkaloids the sclerotia. Resistant wheat genotypes are known, but their effectiveness against different C. purpurea isolates over geographic regions has not been studied. The objective this study was to examine pathogenic variability among on lines differing resistance. Under controlled environmental conditions, 41 single spore were obtained from Canadian UK collections...
Ergot, caused by the fungal pathogen Claviceps purpurea, infects female flowers of a range cereal crops, including wheat. To understand interaction between C. purpurea and hexaploid wheat we undertook an extensive examination reprogramming transcriptome in response to infection through floral tissues (i.e. stigma, transmitting base ovule ovary) over time.
Abstract Many factors are known to influence infection by cereal rusts, including environmental variables such at light, humidity and temperature, the topography of leaf surface, as well plant volatiles. However, few studies have aimed link these factors. Previously, quantity light received wheat seedlings prior inoculation with Puccinia striiformis f. sp. tritici (Pst) urediniospores was shown yellow rust efficiency. In this study we show that germination ability germlings (germinated...
Abstract Background: Ergot, caused by the fungal pathogen Claviceps purpurea , infects female flowers of a range cereal crops, including wheat. To understand interaction between C. and hexaploid wheat we undertook an extensive examination reprogramming transcriptome in response to infection through floral tissues (i.e. stigma, transmitting base ovule ovary) over time. Results: hyphae were observed have grown into down stigma at 24 hours (H) after inoculation. By 48H had tissue base, while...
Partial resistance to the biotrophic fungal pathogen Claviceps purpurea, causal agent of ergot, has been found that colocates with mutant alleles wheat Reduced height (Rht) loci on chromosomes 4B and 4D. These Rht represent orthologs Arabidopsis Della genes. To investigate role DELLA proteins in ergot resistance, we assessed C. purpurea infection near-isogenic lines (NILs) carrying gibberellic acid (GA)-insensitive semidwarf Rht-B1b Rht-D1b severe dwarf Rht-B1c Rht-D1c. NILs GA-sensitive...