INTECH 16/12/11 Accuracy of Real-Time PCR to Study Mycosphaerella graminicola Epidemic in Wheat: From Spore Arrival to Fungicide Efficiency. AGRONOMY 26/09/19 Seed Coating with Thyme Essential Oil or Paraburkholderia phytofirmans PsJN Strain: Conferring Septoria Leaf Blotch Resistance and Promotion of Yield and Grain Isotopic Composition in Wheat. Septoria leaf blotch (SLB) is considered one of the most devastating diseases affecting global wheat production.
Biostimulant application is among the modern approaches in plant protection to overcome the impact of SLB’s fungicide resistance. In this manner, the effect of coating seeds with thyme essential oil or Paraburkholderia phytofirmans PsJN strain on SLB severity and yield components (spikes/m2, straw yield (SY), grain yield (GY) and thousand kernel weight (TKW)) were assessed under field conditions for 3 years. The effect on physiological traits and nitrogen and carbon isotope composition (δ15Ngrain, δ13Cgrain) and nitrogen and carbon content (Ngrain, Cgrain) of grains was assessed in one year of study.
The increasing SLB severity decreased all yield components, increased δ15Ngrain and Cgrain content and slightly decreased δ13Cgrain as the resulting effect of Zymoseptoria tritici inducing stomatal opening and leaf necrosis. Ecological Informatics Volume 36, November 2016, Poster : Spatial prediction of wheat septoria leaf blotch (Septoria tritici) disease severity in Central Ethiopia. CHILEAN JOURNAL OF AGRICULTURAL RESEARCH 78(4) OCTOBER-DECEMBER 2018 Occurrence of Septoria tritici blotch (Zymoseptoria tritici) disease on durum wheat, triticale, and bread wheat in Northern Tunisia. BIORXIV 03/06/19 Control of Septoria tritici blotch by winter wheat cultivar mixtures: Meta-analysis of 19 years of cultivar trials.
BIORXIV 10/06/19 Improved control of Septoria tritici blotch in durum wheat using cultivar mixtures. ROYAL SOCIETY 06/05/19 A new mechanistic model of weather-dependent Septoria tritici blotch disease risk. 1.
Introduction Crop plants are threatened by a plethora of pathogens . Despite fungicide application and deployment of disease-resistant cultivars, such pathogens destroy around one-quarter of food production worldwide . Wheat is the most important global cereal crop ; in the UK alone, over 12 million tonnes of wheat were harvested in 2013–2014 . However, UK wheat yields are reduced up to 10% by the fungal pathogen Zymoseptoria tritici, the causal agent of Septoria tritici blotch (STB) , despite a spend of around £145 million (2014) on fungicides for its control [4,5]. Wind-dispersed ascospores are the primary inoculum of Z. tritici . Both correlative and mechanistic attempts have been made to model STB disease risk and to develop disease forecasting tools based on weather data [19,20]. Here, we develop a new mechanistic model for STB (model A). 2. (a) Infection risk model parameterization TPC(T)=1LPmin+Curv×(T−Topt)2, (b) Model execution 3. 4.
Data accessibility Funding. Basic and Applied Ecology Available online 26 May 2018 Drought and soil fertility modify fertilization effects on aphid performance in wheat. BIOONE 08/05/17 Quality and yield response to the control of Mycosphaerella graminicola in wheat as affected by nitrogen rate and cultivar bread-making characteristics. TheGRDC VIA YOUTUBE 22/03/17 Septoria tritici blotch, leaf rust update - N. Poole. eXtensionAUS Field Crop Diseases VIA YOUTUBE 10/04/18 Septoria tritici blotch update - Nick Poole, FAR Australia. FRONT PLANT SCI 23/05/18 Proximal Phenotyping and Machine Learning Methods to Identify Septoria Tritici Blotch Disease Symptoms in Wheat. Introduction Septoria tritici blotch (STB) caused by Zymoseptoria tritici is currently one of the most devastating foliar diseases of wheat in Northwestern Europe causing yield losses every year (Fones and Gurr, 2015; Chawade et al., 2018).
It is a hemibiotrophic fungus which penetrates host leaves through stomata and grows very slowly in the intercellular spaces of the mesophyll cells. The latent phase varies between 14–28 days under field conditions and 9–14 days under laboratory conditions (Kema et al., 1996; Shetty et al., 2003; Keon et al., 2007). This symptomless period has been referred to as ‘biotrophic’ (Kema et al., 2000), however, after more detailed transcriptomic and metabolic analysis, this term has become debatable (Rudd et al., 2015; Sánchez-Vallet et al., 2015). A cultivar with a high level of resistance can provide an effective mode to control the disease severity, but so far, cultivars with complete resistance are not developed (Chartrain et al., 2004).
PhD thesis, University of Nottingham. Disease tolerance is defined as the ability to maintain grain yield in the presence of disease and could be a potential defence mechanism to be incorporated into breeding programmes. It is an attractive goal, as disease tolerance has the potential to be a broad-spectrum, durable defence mechanism while exerting little selection pressure on pathogen populations. Relatively little is known about how disease tolerance is conferred, but most of the hypotheses suggest resource capture and resource-use traits such as large green canopy area, increased light extinction coefficient and a high source to sink balance. Disease tolerance in current wheat genotypes is generally associated with low yield potential, and for disease tolerance to be incorporated into commercial breeding it is important to determine whether this link can be disassociated.
Mol Plant Pathol. 2017 Feb;18(2):276-292. Sources of resistance and susceptibility to Septoria tritici blotch of wheat. Environ Sci Pollut Res Int. 2017 Jun 21. Biocontrol of the wheat pathogen Zymoseptoria tritici using cyclic lipopeptides from Bacillus subtilis. Samara MejriAli SiahFrançois CoutteMaryline Magnin-RobertBéatrice RandouxBenoit TisserantFrançois KrierPhilippe JacquesPhilippe ReignaultPatrice HalamaEmail author Chemistry, Activity and Impact of Plant Biocontrol products.
J Appl Microbiol. 2017 Apr;122(4):932-939. Thyme essential oil as an alternative mechanism: biofungicide-causing sensitivity of Mycosphaerella graminicola. Aims To understand the mode of action of thyme essential oil as an alternative biofungicide.
ROTHAMSTED_AC_UK - OCT 2016 - Learning from the “healthy” to protect the “infected” A novel mechanism has been identified which likely contributes to resistance against Septoria leaf blotch in plant species normally non-infected with the disease, providin. ETH-ZURICH - 2012 - Présentation : Population genetics and evolutionary biology of plant pathogenic fungi. Plant Pathology Plant pathogens evolve rapidly to overcome the disease control strategies that are deployed against them.
Resistance genes often fail within a few years after deployment and fungicide resistance often emerges within a few years after the first spray. Our research is oriented around understanding the processes that drive pathogen evolution with the aim of developing disease management strategies that will remain effective for a long time. Our research is oriented mainly at the level of populations and often includes the individual organisms, but rarely focuses on cellular or molecular processes. Pathogen origins and pathogen emergencePathogen evolutionary biologyPathogen population genetics and phylogeographyFungal genomics and effectorsFungicide resistanceDeployment of disease resistance genesSustainable agriculturePlant breeding and crop biotechnologyQuantitative geneticsWorld Food SystemGenetic Diversity CenterComparative genomics.
UNIVERSITY OF NOTTINGHAM - 2011 - Thèse en ligne : Fungicide resistance and efficacy for control of Pyrenophora teres and Mycosphaerella graminicola on barley and wheat. JOURNAL OF AGRICULTURAL SCIENCE AND TECHNOLOGY - 2013 - Tunisian Population of the Wheat Pathogen Mycosphaerella graminicola is Still Fully Sensitive to Strobilurin Fungicides. COORDINATED INTEGRATED PEST MANAGEMENT IN EUROPE 16/03/17 Keeping one step ahead of resistant fungi (septoriose du blé)
2017.03.16 | Janne Hansen Photo: Janne Hansen The race is on between fungicides that can effectively control pathogenic fungi in wheat and the fungi themselves, which are pretty talented at re-inventing themselves to resist the fungicides that aim to control them. Wheat production in northern Europe is reliant on the application of pesticides throughout the growing season. Fungicides account for approximately 25 percent of these applications, with the disease septoria tritici blotch (STB) as the primary target. In the battle against this fungus in wheat, the available fungicides are but a brief respite because the fungus is adept at developing resistance to the available fungicides. . - Unfortunately, the evolutionary potential of the fungus causing the disease STB, Zymoseptoria tritici, coupled with the highly specific nature of current fungicide chemistries, place the pathogen at a high risk of fungicide resistance development, says Dr.
</b></div></div> Article. Justus Liebig Universität Giessen - AVRIL 2014 - Thèse en ligne : Impact of fungicide mode of action and application timing on the control of Mycosphaerella graminicola and the physiology and yield of wheat. Communications in agricultural and applied biological sciences 01/2012 Evaluation of plant resistance inducers on different winter soft wheat cultivars against Septoria leaf blotch.
International Research Journal of Applied and Basic Sciences - 2013 - Evaluation of Iranian wheat cultivars Reaction to Septoria Tritici Blotch and virulence Survey of Mycosphaerella graminicola in Khuzestan province. JOURNAL OF LIFE SCIENCES 03/2014; 8(3):211-22. Genetic diversity of Mycosphaerella graminicola in Morocco using amplified fragment length polymorphism. SID_IR - SEPT 2011 - Genetic analysis and heritabilities of resistance to Mycosphaerella graminicola in wheat. Theor Appl Genet - 2011 - Genetic analysis of resistance to septoria tritici blotch in the French winter wheat cultivars Balance.
Pest Manag Sci (2010) 27/07/10 Multiple mechanisms account for resistance to sterol 14α-demethylation inhibitors in field isolat. Mycologia 2011;103:764. Genetic diversity and population structure in French populations of Mycosphaerella graminicola. + Author Affiliations Abstract Mycosphaerella graminicola populations were examined in France with microsatellite markers and PCR-SSCP analysis of partial actin and β-tubulin encoding sequences. A total of 363 isolates was sampled in 2005 from 17 provinces and genotypes from corresponding strains were characterized. Unique haplotypes comprised 84% of the population and gene diversity was high nationwide (0.70) and locally. A moderate genetic differentiation (GST= 0.18) was found and indicated that in France the M. graminicola population was more structured than in other previously studied European countries.
Footnotes ↵* Unité de Chimie Environnementale et Interactions sur le Vivant, Université du Littoral Côte d'Opale, 17, avenue Blériot, Calais cedex, BP 699, 62228, France Philippe.Reignault@univ-littoral.fr Received for publication June 9, 2010. Peer Reviewed Journal 28/03/11 Finished genome of the fungal wheat pathogen Mycosphaerella graminicola reveals dispensome struct. Int. J. Mol. Sci. 2011, 12(1), 682-693; Detection of Mycosphaerella graminicola in Wheat Leaves by a Microsatellite Dinucleotid. Open AccessThis article isfreely availablere-usable Article 1 Institute of Phytopathology, Christian-Albrechts-University Kiel, Hermann-Rodewald-Str. 9, D-24118, Kiel, Germany 2 Botany and Microbiology Department, College of Science, King Saud University, P.O.
Box: 2455, Riyadh 1145, Saudi Arabia 3 Plant Pathology Research Institute, Agricultural Research Centre, Giza, Egypt 4 Laboratory of Phytopathology, Wageningen University, Droevendaalsesteeg 1, NL-6708 PB Wageningen, The Netherlands * Author to whom correspondence should be addressed. Received: 2 December 2010; in revised form: 4 January 2011 / Accepted: 4 January 2011 / Published: 19 January 2011.
FARMERS GUARDIAN 10/06/11 Genetic advance may reduce septoria threat. SCIENTISTS have cracked the genetic code of septoria tritici - the most important foliar disease of wheat in the UK - and in doing so have gained an insight into how the disease is able to evade wheat’s natural defences. The researchers, who were funded by the BBSRC and others, hope the study, which reveals the complete genome sequence of the septoria pathogen mycosphaerella graminicola, will enable them to breed resistant crop plants or improve the use of pesticides.
Septoria typically results in yield losses of 5-15 per cent each season but losses can reach 50 per cent in severely affected crops. According to Prof Kim Hammond-Kosack of Rothamsted Research, who led the study in the UK, septoria attacks wheat plants by stealth. “There is normally a period of about a week between when a plant first becomes infected and when the characteristic blotches of the disease appear on its leaves. Researchers suspect this low numbers of genes may be crucial to the fungus’ stealth approach. Target. UPI 13/06/11 Costly wheat fungus' genome mapped (Mycosphaerella graminicola) WEST LAFAYETTE, Ind., June 13 (UPI) -- One of the most destructive wheat viruses is genetically structured to evade detection before infecting its host, a U.S. study mapping the fungus' genome found. Principle author Goodwin, a Purdue University research plant pathologist, said the fungus had fewer enzyme-producing genes that many fungi use to penetrate and digest plants' surfaces while infecting them.
Goodwin worked on sequencing the genome of the fungus Mycosphaerella graminicola, which causes septoria tritici blotch, a disease that reduces yield and quality in wheat, the university said in a release. "We're guessing that the low number of enzymes is to avoid detection by plant defenses," Goodwin said. Enzymes typically break down plant cell walls and begin removing nutrients, leading to the plant's death, the researcher said.
M. graminicola enters the plant through small pores in the surface of leaves. PLOS 09/06/11 Finished Genome of the Fungal Wheat Pathogen Mycosphaerella graminicola Reveals Dispensome Structure, Chromosome P. Abstract. PLOS 19/04/12 Mutagenesis and Functional Studies with Succinate Dehydrogenase Inhibitors in the Wheat Pathogen Mycosphaerella gr. HINDAWI - 2012 - Population Structure of Mycosphaerella graminicola and Location of Genes for Resistance to the Pathogen: Recent. Url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CEwQFjAA&url=http%3A%2F%2Fdownloads.hindawi.com%2Fjournals%2Fija%2F2012%2F680275.