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2 edition of Molecular karyotyping of Ustilago hordei and related smut fungi found in the catalog.

Molecular karyotyping of Ustilago hordei and related smut fungi

Kevin McCluskey

Molecular karyotyping of Ustilago hordei and related smut fungi

by Kevin McCluskey

  • 83 Want to read
  • 17 Currently reading

Published .
Written in English

    Subjects:
  • Ustilago hordei.,
  • Smut fungi.,
  • Ustilaginaceae.,
  • Fungi -- Genetics.

  • Edition Notes

    Statementby Kevin McCluskey.
    The Physical Object
    Pagination142 leaves, bound :
    Number of Pages142
    ID Numbers
    Open LibraryOL15188374M

    Ustilago is the largest genus in the Ustilaginales, with approximately species, and most species parasitize monocotyledonous hosts. Teliospores of Ustilago spp. typically germinate with a cylindrical, mostly four-celled basidium. Each basidial cell repeatedly buds off basidiospores (=sporidia), which produce the haploid yeast state. This chapter discusses species that include Ustilago hordei in particular, that have provided useful comparative information leading to insights into the genetic basis of bipolar versus tetrapolar mating systems in the smut fungi as a group. It first discusses the importance of smut fungi and the interactions of these pathogens with host plants to provide context for appreciating the role of.

    PDF | On Jan 1, , K.S. Braithwaite and others published Genetic variation in a worldwide collection of the sugarcane smut fungus Ustilago scitaminea | Find, read and cite all the research you. Detailed descriptions are given of nine hybrids obtained from crosses at the Institute of Agricultural Sciences, Washington, between one race of U. Hordei and four races of U. bullata. All the F1 hybrids, grown on Elymus canadensis and E. glaucus, had echinulate spores; this indicates a partial dominance of the genetic determinants of the granular verrucose walls found in U. bullata over the.

      The fungus Ustilago maydis (U. maydis) is one of these examples. It is a member of the smut fungi: a large group of parasites infecting mostly grasses, including several important crop plants such as maize, wheat, barley, and sugar cane. The maize smut fungus Ustilago maydis is a model organism for elucidating host colonization strategies of biotrophic fungi. Here, we performed an in depth transcriptional profiling of the entire plant-associated development of U. maydis wild-type strains. In our analysis, we focused on fungal metabolism, nutritional strategies, secreted effectors, and regulatory networks.


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Molecular karyotyping of Ustilago hordei and related smut fungi by Kevin McCluskey Download PDF EPUB FB2

Molecular Karyotyping of Ustilago hordei and Related Smut Fungi INTRODUCTION General introduction Smut fungi cause important diseases of many crop plants throughout the world and the biology of these fungi has been studied at a variety of levels. Covered smut of barley is caused by the fungus Ustilago hordei, and is a continuing problem where.

Molecular fingerprinting, and karyotype analysis of Ustilago hordei and related smut fungi Public Deposited. The taxonomic distinctness of U. maydis from the rest of the smut fungi was evidenced by its divergence at 7 nucleotides in the S rDNA coding by: 2. Molecular fingerprinting, rDNA internal transcribed spacer sequence, and karyotype analysis of Ustilago hordei and related smut fungi and karyotype analysis of Ustilago hordei and related smut fungi.

Download PDF (7 MB) Abstract. Graduation date: Inbreeding of the avirulent physiologic race 8 strains of Ustilago hordei was\ud. The closely related smut fungi Ustilago maydis, U. hordei, and Sporisorium reilianum f. zeae are facultatively biotrophic basidiomycetes that occur ubiquitously.

Teliospores germinate to produce sporidia of different mating type that grow saprophytically and multiply mitotically by mass proliferation and sexual genetic exchange, successful colonization of economically Cited by: Download PDF: Sorry, we are unable to provide the full text but you may find it at the following location(s): (external link).

Molecular analysis of the karyotype of Ustilago maydis. Molecular Cloning: A Laboratory Manual. Molecular karyotype analysis of fungi. Pages in: More Gene Manipulations (). Molecular karyotyping of Ustilago hordei and related smut fungi.

In addition to the b mating-type complexes, smut fungi contain genes necessary for cell–cell recognition located in the a mating-type loci, encoding pheromones and pheromone receptors.

The detailed structure of these loci has been determined for both a alleles of U. maydis, for all three a alleles of S. reilianum and for the MAT-1 allele of U. hordei ().

Title: Molecular Fingerprinting, rDNA Internal Transcribed Spacer Sequence, and Karyotype Analysis of Ustilago hordei and Related Smut Fungi Abstract approved. Da llice Mills Inbreeding of the avirulent physiologic race 8 strains of Ustilago hordei was purported to have increased its pathogenicity in a stepwise manner that led to a highly.

Smut diseases are caused by Basidiomycetes of the order Ustilaginales. Their occurrence is worldwide and cereals and grasses serve as most common hosts. Among the estimated species of smut fungi. Cell–cell signaling is an integral part of the sexual and disease cycles of the smut fungi, which must mate to be pathogenic.

This study reports the cloning and characterization of the pheromone genes Uhmfa1 and Uhmfa2 from MAT-1 and MAT-2 mating types of U. hordei, respectively, and the pheromone receptor gene Uhpra2 from MAT-2 cells.

Similar to other fungal pheromone genes. D.A. Gaudet, Y.Y. Wang, C. Penniket, et logical and molecular analyses of host and nonhost interactions involving barley and wheat and the covered smut pathogen Ustilago hordei Mol.

Plant Microbe Interact., 23 (), pp./mpmi   U. hordei contains 19 mig1-related genes (Laurie et al., ), and in contrast to the three copies in U. maydis and the eight mig1-related genes in S. reilianum that are located in a single locus in the two fungi (Schirawski et al., ), the 19 mig1-related genes are spread all throughout the genome in U.

hordei. Genetically, U. maydis is closely related to other smut fungi, including Sporisorium reilianum, Sporisorium scitamineum, Ustilago hordei, Ustilago bromivora and Melanopsichium pennsylvanicum. Among these, S. reilianum is of special interest as it is most closely related to.

Molecular karyotyping of Ustilago hordei and related smut fungi Public Deposited. Analytics × Add. Ustilago maydis is a member of the smut fungi (phylum Basidiomycota) that infect maize. This group of plant pathogens is characterized by. Ustilago hordei is a biotrophic parasite of barley (Hordeum vulgare).

After seedling infection, the fungus persists in the plant until head emergence when fungal spores develop and are released from sori formed at kernel positions. The Mb U. hordei genome contains protein encoding genes with high synteny to the smaller genomes of the related, maize-infecting smut fungi Ustilago.

We have employed two species from the genus Ustilago (smut fungi) to discover a molecular explanation for the genetic difference in mating systems. Ustilago maydis, a tetrapolar species, has two genetically unlinked loci that encode the distinct mating functions of cell fusion (a locus) and subsequent sexual development and pathogenicity (b locus).

The genome of U. maydis has been sequenced (Kämper et al., ) as have the genomes of the related Sporisorium reilianum (head smut of maize and sorghum; Schirawski et al., ) and Ustilago hordei (covered smut of barley; Laurie et al., ). The basidiomycete smut fungi have been intensively studied over the past century because of their threat to the yield and quality of major crop plants.

(DC.) Corda (common smut of corn), Ustilago hordei (Pers.) Lagerh. and related species (smut of small grain Molecular analysis of the karyotype of Ustilago maydis.

Chromosoma Smut fungi induce disease only in their dikaryotic stage, which is generated by mating. Mating is regulated by two loci, which harbor conserved genes. In the a locus these genes specify pheromones and receptors, while in the b locus two transcription factors are encoded.

This chapter focuses on the signaling cascades, which coordinate cyclic AMP (cAMP) and mitogen-activated protein kinase. Ustilago hordei occurs worldwide and causes covered smut of cultivated barley and oats. The smut spores are spread during harvest and other seed handling operations.

The spores are carried externally on the seed, and when it is sown the spores germinate in the soil along with the seed and penetrate the shoots of seedlings just before they emerge from the soil.While U. maydis itself is not an economic threat, other related smut and bunt fungi of cereals are serious problems.

Basic studies of plant pathogenesis have already revealed similarities in the mating type control system of U. maydis and Ustilago hordei which controls the abilility of these fungi .The closely related smut fungi Ustilago maydis, U. hordei, and Sporisorium reilianum f.

sp. zeae are facultatively biotrophic basidiomycetes that occur ubiquitously.