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Septoriose du blé et résistance

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UNIVERSITY OF NOTTINGHAM - 2011 - Thèse en ligne : Fungicide resistance and efficacy for control of Pyrenophora teres and Mycosphaerella graminicola on barley and wheat. Marzani, Qasim Abdulla (2011) Fungicide resistance and efficacy for control of Pyrenophora teres and Mycosphaerella graminicola on barley and wheat.

UNIVERSITY OF NOTTINGHAM - 2011 - Thèse en ligne : Fungicide resistance and efficacy for control of Pyrenophora teres and Mycosphaerella graminicola on barley and wheat

PhD thesis, University of Nottingham. Barley net blotch (BNB) caused by Pyrenophora teres, and Septoria tritici blotch (STB) caused by Mycosphaerella graminicola, are destructive cereal diseases worldwide on barley and wheat respectively. Due to the lack of highly resistant cultivars, both diseases are widely controlled using fungicides. Systemic, site-specific modern fungicides have played an essential role in disease management in cereals. Results revealed a high frequency of the F129L mutation within recent UK P. teres isolates. Sequence results of CYP51 gene fragment indicated existence of 15 alterations in recent UK and German isolates of M. graminicola. Q-PCR was also used to evaluate in planta fungicide activity on both diseases.

Actions (Archive Staff Only) UNIVERSITE DE LOUVAIN - 2018 - Thèse en ligne : Caractérisation de la résistance de Zymoseptoria tritici aux Inhibiteurs de la déméthylation dans la population belge. UNIVERSITAT HOHENHEIM - 2018 - Thèse en ligne : Analysis of the emerging situation of resistance to succinate dehydrogenase inhibitors in Pyrenophora teres and Zymoseptoria tritici in Europe. 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.

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

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. ►▼ Show Figures Figure 1.

AKADEMIAI 29/11/12 Molecular breeding for Septoria tritici blotch resistance in wheat. CRA-W - 2010 - Poster : Evolution of resistance to triazoles in Belgian populatiokns of Mycosphaerella graminicola. PLANT PROTECTION SCIENCE - 2002 - Understanding field resistance mechanisms for improved control of Septoria tritici. UNIVERSITY OF MANITOBA - 2011 - Molecular mapping of septoria tritici blotch resistance in hexaploid wheat (Triticum aestivum L.)

NEW PHYTOLOGIST 25/04/18 A fungal avirulence factor encoded in a highly plastic genomic region triggers partial resistance to septoria tritici blotch. Front Plant Sci. 2017; 8: 1586. Genome-Wide Association Study of Septoria tritici Blotch Resistance in Ethiopian Durum Wheat Landraces. Phytopathology. 2018 May;108(5):568-581. Ranking Quantitative Resistance to Septoria tritici Blotch in Elite Wheat Cultivars Using Automated Image Analysis. Mol Plant Pathol. 2017 Feb;18(2):276-292. Sources of resistance and susceptibility to Septoria tritici blotch of wheat. MAA CEP 08/03/18 Caractérisation d'un premier gène de résistance au champignon responsable de la septoriose du blé. La septoriose (ou STB), qui cause d'importantes pertes de rendement dans les cultures de blé, fait l'objet de nombreuses recherches scientifiques.

MAA CEP 08/03/18 Caractérisation d'un premier gène de résistance au champignon responsable de la septoriose du blé

Une récente publication dans la revue Nature Genetics, présentée dans un communiqué de l'Inra, expose les travaux sur un gène de résistance (Stb6) au champignon pathogène responsable de cette maladie, menés par des chercheurs de l'Institut et du centre de recherche de Rothansted (Royaume-Uni). Si 21 de ces gènes avaient été identifiés et localisés auparavant, aucun n'avait encore été cloné et caractérisé fonctionnellement comme Stb6, présent dans la plupart des variétés cultivées et primordial dans les voies de défense.

Aujourd'hui connue, la structure de la protéine membranaire codée par Stb6 lui permet de détecter les modifications de la paroi cellulaire dues à l'agent pathogène, induisant, grâce à son activité kinase, les mécanismes de défense de la plante. Source : Nature Genetics. ROTHAMSTED RESEARCH 12/02/18 ANOTHER BLOW TO FUNGAL INFECTION For the first time, researchers have isolated a natural resistance gene to Septoria, Europe’s most economically damaging wheat disease and a fungal threat to wheat crops globally. Phytopathology. 2017 Dec 6. Ranking quantitative resistance to Septoria tritici blotch in elite wheat cultivars using automated image analysis. Crop Protection Volume 99, September 2017, Anti-resistance strategies for fungicides against wheat pathogen Zymoseptoria tritici with focus on DMI fungicides.

Highlights DMI fungicides still provide adequate disease control against septoria tritici blotch (STB).

Crop Protection Volume 99, September 2017, Anti-resistance strategies for fungicides against wheat pathogen Zymoseptoria tritici with focus on DMI fungicides

Different DMI fungicides select differently for CYP51 alterations. Diversification of spray programmes against STB minimises selection for CYP51 alterations. The Zymoseptoria tritici population is dynamic and responds readily to specific DMI inputs. Abstract Septoria tritici blotch (STB) caused by the fungal pathogen Zymoseptoria tritici is a global threat to sustainable wheat production. Pest Manag Sci. 2013 Feb;69(2):150-5. Update on mechanisms of azole resistance in Mycosphaerella graminicola and implications for future control. This review summarises recent investigations into the molecular mechanisms responsible for the decline in sensitivity to azole (imidazole and triazole) fungicides in European populations of the Septoria leaf blotch pathogen, Mycosphaerella graminicola.

Pest Manag Sci. 2013 Feb;69(2):150-5. Update on mechanisms of azole resistance in Mycosphaerella graminicola and implications for future control.

The complex recent evolution of the azole target sterol 14α-demethylase (MgCYP51) enzyme in response to selection by the sequential introduction of progressively more effective azoles is described, and the contribution of individual MgCYP51 amino acid alterations and their combinations to azole resistance phenotypes and intrinsic enzyme activity is discussed. In addition, the recent identification of mechanisms independent of changes in MgCYP51 structure correlated with novel azole cross-resistant phenotypes suggests that the further evolution of M. graminicola under continued selection by azole fungicides could involve multiple mechanisms. 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. Septoria leaf blotch is a highly damaging disease of wheat and scientists are looking for ways to manage it more effectively.

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

Most studies have looked directly at the interaction between wheat and Septoria but, in a novel approach, scientists at Rothamsted Research, who are strategically funded by the BBSRC, have instead looked at how plant species that do not get infected by Septoria achieve resistance. Most plants are resistant to the majority of microbes, a phenomenon known as non-host resistance, or NHR. Using non-host tobacco plants and advanced molecular techniques, the scientists characterised several genes linked to protection against infection in a study just published in the journal New Phytologist. Fungi and their potential host plants are locked in a battle the outcome of which is strongly influenced by the expression and function of their genes as they recognise and respond to each other during attempted infection. Molecular Breeding 25/06/11 The genetic architecture of seedling resistance to Septoria tritici blotch in the winter wheat doubled-haploid population Solitär × Mazurka.

PLANT PATHOLOGY - 2001 - A detached seedling leaf technique to study resistance to Mycosphaerella graminicola (anamorph Septoria tritici) in wheat. 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 and Apache. Pest Manag Sci (2010) 27/07/10 Multiple mechanisms account for resistance to sterol 14α-demethylation inhibitors in field isolates of Mycosphaerella graminicola. UNIVERSITY OF NOTTINGHAM - 2011 - Thèse en ligne : Fungicide resistance and efficacy for control of Pyrenophora teres and Mycosphaerella graminicola on barley and wheat. HINDAWI - 2012 - Population Structure of Mycosphaerella graminicola and Location of Genes for Resistance to the Pathogen: Recent Advances in Argentina.

UNIVERSITY OF NOTTINGHAM - 2011 - Fungicide resistance and efficacy for control of Pyrenophora teres and Mycosphaerella graminicola on barley and wheat.