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Charbon du maïs (Ustilago maydis)

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Unidad de Tecnología Educativa y Campus Virtual via YOUTUBE 13/04/16 Ustilago maydis, DE LA GASTRONOMÍA AL LABORATORIO CIENTÍFICO. MICROBIOLOGY 01/06/16 Trehalose is required for stress resistance and virulence of the Basidiomycota plant pathogen Ustilago maydis. BIO PROTOCOL 20/03/16 Ustilago maydis Virulence Assays in Maize. The basidiomycetous smut fungus Ustilago maydis (U. maydis) infects all aerial parts of its host plant maize (Zea mays L.).

BIO PROTOCOL 20/03/16 Ustilago maydis Virulence Assays in Maize

Infection symptoms are seen in the form of prominent tumors on all aerial parts of maize, after the establishment of a biotrophic interaction with the host usually around 5-6 days post infection (dpi). The fungus colonizes the various developmentally distinct aerial organs at different stages of development to form these prominent symptoms. Although being a biotrophic plant pathogen, U. maydis can easily be cultivated under axenic conditions to produce a standardized inoculum. The infections can be carried out under laboratory conditions by syringe inoculation on all the aerial organs of maize. This protocol has been successfully utilized to infect all the aerial organs of maize and formulate the virulence assays in U. maydis making it an excellent model system to study phyto-pathological investigations (Schilling et al., 2014; Redkar et al., 2015). PLOS 22/06/16 The WOPR Protein Ros1 Is a Master Regulator of Sporogenesis and Late Effector Gene Expression in the Maize Pathogen Ustilago maydis.

Abstract The biotrophic basidiomycete fungus Ustilago maydis causes smut disease in maize.

PLOS 22/06/16 The WOPR Protein Ros1 Is a Master Regulator of Sporogenesis and Late Effector Gene Expression in the Maize Pathogen Ustilago maydis

Hallmarks of the disease are large tumors that develop on all aerial parts of the host in which dark pigmented teliospores are formed. We have identified a member of the WOPR family of transcription factors, Ros1, as major regulator of spore formation in U. maydis. ros1 expression is induced only late during infection and hence Ros1 is neither involved in plant colonization of dikaryotic fungal hyphae nor in plant tumor formation. However, during late stages of infection Ros1 is essential for fungal karyogamy, massive proliferation of diploid fungal cells and spore formation. Premature expression of ros1 revealed that Ros1 counteracts the b-dependent filamentation program and induces morphological alterations resembling the early steps of sporogenesis.

Author Summary The fungus Ustilago maydis is a pathogen of maize which induces tumor formation in the infected tissue. Current Opinion in Microbiology Volume 34, December 2016 Cell biology of corn smut disease — Ustilago maydis as a model for biotrophic interactions. MOLECULAR PLANT PATHOLOGY 08/08/16 Characterization of ApB73, a virulence factor important for colonization of Zea mays by the smut Ustilago maydis. Summary The biotrophic fungus Ustilago maydis, the causal agent of corn smut disease, uses numerous small secreted effector proteins to suppress plant defence responses and reshape the host metabolism.

MOLECULAR PLANT PATHOLOGY 08/08/16 Characterization of ApB73, a virulence factor important for colonization of Zea mays by the smut Ustilago maydis

However, the role of specific effectors remains poorly understood. Here, we describe the identification of ApB73 (Apathogenic in B73), an as yet uncharacterized protein essential for the successful colonization of maize by U. maydis. We show that apB73 is transcriptionally induced during the biotrophic stages of the fungal life cycle. The deletion of the apB73 gene results in cultivar-specific loss of gall formation in the host. Introduction Biotrophic pathogens require a living host to complete their life cycle. Despite the vital role of effectors for pathogenicity, the actual deletion of many does not necessarily lead to impaired virulence of the pathogen (Kämper et al., 2006; Lindeberg et al., 2012; Saitoh et al., 2012; Schilling et al., 2014). Results. Food Control Volume 71, January 2017, Mycotoxin contamination in corn smut (Ustilago maydis) galls in the field and in the commercial food products.

A Biological Control of Pests Research Unit, US Department of Agriculture, Agricultural Research Service, Stoneville, MS, 38776, USAb Department of Medicinal Chemistry, College of Pharmacy, University of Minnesota, Minneapolis, MN, 55455, USAc Department of Biochemistry, School of Chemistry, UNAM, 04510, Mexico, D.F., Mexicod Crop Genetic Systems Research Unit, US Department of Agriculture, Agricultural Research Service, Stoneville, MS, 38776, USAe Department of Agricultural Sciences, University of Bologna, Bologna, 40127, Italyf Crop Production Systems Research Unit, US Department of Agriculture Agricultural Research Service, Stoneville, MS, 38776, USA Received 21 March 2016, Revised 13 May 2016, Accepted 8 June 2016, Available online 11 June 2016 Choose an option to locate/access this article: Check if you have access through your login credentials or your institution Check access doi:10.1016/j.foodcont.2016.06.006 Get rights and content Highlights Abstract Keywords.

Food Control Volume 71, January 2017, Mycotoxin contamination in corn smut (Ustilago maydis) galls in the field and in the commercial food products

MOLECULAR PLANT PATHOLOGY 18/04/15 Virulence of the maize smut Ustilago maydis is shaped by organ-specific effectors. Fungal Genet Biol. 2016 Apr;89:3-9. Genome editing in Ustilago maydis using the CRISPR-Cas system. JOURNAL OF AGRICULTURAL RESEARCH - JULY 2015 - First Report of Ustilago maydis (Pers.) Roussel the Causal Agent of Smut of Corn,Zeamays (L.) Pers. In South Sudan: A note. UNIVERSITY OF GEORGIA 01/03/14 A Rapid and Efficient Method for Assessing Pathogenicity of Ustilago maydis on Maize and Teosinte Lines. Molecular Plant Pathology . 02/2014; Virulence of the maize smut Ustilago maydis is shaped by organ-specific effectors.

Fungal Biology Volume 119, Issues 2–3, March 2015, Assessment of Ustilago maydis as a fungal model for root infection studies. WIKIPEDIA ESPAGNOL - Ustilago maydis. Etimología[editar] Luis Cabrera, en su Diccionario de aztequismos, afirma que la palabra huitlacoche o huitacoche es una forma errónea derivada de cuitlacoche, que hace referencia a un ave (Harporhynchus longirostris Schl) que se alimenta al ras del suelo de la milpa.

WIKIPEDIA ESPAGNOL - Ustilago maydis.

WIKIPEDIA - Corn smut. Etymology[edit] In Mexico, corn smut is known as huitlacoche [wit͡ɬakot͡ʃe], sometimes spelled cuitlacoche).

WIKIPEDIA - Corn smut.

This word entered Spanish in Mexico from classical Nahuatl, though the Nahuatl words from which huitlacoche is derived is debated. In modern Nahuatl, the word for huitlacoche is cuitlacochin [kʷit͡ɬɑˈkot͡ʃin], and some sources deem cuitlacochi to be the classical form.[2] Some sources wrongly give the etymology as coming from the Nahuatl words cuitlatl [ˈkʷit͡ɬɑ] ("excrement" or "rear-end", actually meaning "excrescence") and cochi [ˈkot͡ʃt͡ɬi] (cochi="to sleep"), thus giving a combined mismeaning of "sleeping/hibernating excrement".,[2][3] but actually meaning "sleeping excrescence", referring to the fact that the fungus grows in between the corns and impedes them from developing, thus they remain "sleeping".

Characteristics[edit] Biology[edit] Life cycle[edit] WIKIPEDIA – Charbon du maïs. Un article de Wikipédia, l'encyclopédie libre.

WIKIPEDIA – Charbon du maïs.

Czech J. Genet. Plant Breed., 42, 2006 Root Penetration of Maize by Ustilago maydis. Trends Cell Biol. 2008 Feb;18(2):61-67. Ustilago maydis, a new fungal model system for cell biology. Utrecht University - 2009 - Thèse en ligne : The role of repellents and hydrophobins in Ustilago maydis. INSTITUT DE L ELEVAGE - Distribution d'un maïs ensilé avec du charbon. Certaines parcelles de maïs sont fortement attaquées par le charbon.

INSTITUT DE L ELEVAGE - Distribution d'un maïs ensilé avec du charbon

Peut-on distribuer cet ensilage de maïs sans risque ? Avec modération pour des vaches laitières Le charbon du maïs (Ustilago maydis) est le risque fongique le plus fréquent à cause des conditions culturales du maïs. Le charbon se développe plus facilement lorsque la plante souffre d'un manque d'eau ou bien a été grêlé. Il diminue la valeur nutritive du maïs et favorise la prolifération de moisissures. Le champignon du charbon lui-même ne produit pas de toxine, et on ne connaît pas de cas d'intoxication de bovins provoqués par le charbon. Il peut aussi y avoir un développement parallèle d'autres champignons, susceptibles, eux, de secréter des toxines qui pourraient provoquer des dérèglements de la reproduction. L'acidification importante qui apparaît dans l'ensilage par suite des fermentations anaérobies neutralise les spores du charbon des inflorescences.

En pratique il est conseillé de : INRA - Charbon à Ustilago. Fungal Genetics and Biology 49 (2012) 578–587 Interactions between Fusarium verticillioides, Ustilago maydis, and Zea mays: An e. Sex Plant Reprod (2010) 23:1–13 Maize host requirements for Ustilago maydis tumor induction. MOLECULAR PLANT PATHOLOGY - 2012 - The Top 10 fungal pathogens in molecular plant pathology.