Guide Genomics of Plants and Fungi (Mycology)

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  1. Related Subjects
  2. Fungal Genomes Project
  3. Genomics of speciation: dissecting mechanisms of reproductive barriers in fungi
  4. Genomics of speciation: dissecting mechanisms of reproductive barriers in fungi

Research in the lab focuses on understanding the genetic basis of emerging fungal threats to plants and people. We are particularly interested in the evolutionary processes that contribute to population-level diversity, to the formation of new species, and to species diversification. We aim to uncover the genetic basis for differences in pathogenicity, virulence, and host specialization within species and among closely-related species. We want to understand differences between agricultural and natural populations of fungal plant pathogens and how agriculture shapes population structure and diversity.

We use population genetics, population genomics, comparative genomics, and molecular phylogenetics to answer our questions. Other interests include phylogeography, fungal mating systems, and using population genetics to solve epidemiological problems in the field including sources of inoculum, pathogen overwintering mode, populations overcoming host resistance, and the evolution of fungicide resistance. May Join us! Postdoc announcement pdf. Annakay will be working with Dr. The analysis of such a limited number of samples raises the question if such features could be considered hallmarks of Pleosporales, which will be solved soon, in view of the increased rate of sequenced fungal genomes.

The comparison of gene order and orientation in S. Finally, it was further proved the utility of fungal mitochondrial genomes in comparative and phylogenetic studies and highlighted their potential for population studies.

Nucleotide and amino-acid identities are highlighted with colors. In addition, for the particular case of S. Detailed sequence alignment of the schematic sequence alignment presented in Fig 2. Detailed sequence alignment of the schematic sequence alignment presented in Fig 3. Browse Subject Areas? Click through the PLOS taxonomy to find articles in your field.

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Abstract Stemphylium lycopersici Pleosporales is a plant-pathogenic fungus that has been associated with a broad range of plant-hosts worldwide. Introduction Stemphylium teleomorph: Pleospora is a dematiaceous fungal genus belonging to the subphylum Pezizomycotina Ascomycota. Materials and methods Sequence data and mitochondrial genome de novo assembly The mitochondrial genome of S.

Comparative mitogenomics The extent of structural rearrangements in the mitochondrial genomes of S. Phylogenetic analysis The phylogeny of the subphylum Pezizomycotina was inferred by the concatenated amino acid sequences of 12 proteins encoded by the conserved mitochondrial genes involved in the oxidative phosphorylation and electron transport, namely: atp6 , cob , cox1, cox2, cox3, nad1 , nad2 , nad3 , nad4 , nad4L , nad5 and nad6.

Results and discussion General features The mitochondrial genome of S. Download: PPT. Table 1. General features of the mitochondrial genome of S. Table 2. Gene organization of the mitochondrial genome of S. Fig 1.


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Circular map of the mitochondrial genome of S. Protein-coding genes The structural and functional annotation of the mitochondrial genome of S. Table 3. Characteristics of the protein-coding genes of the mitochondrial genome of S. ATP synthase subunits 8 and 9 are encoded by the nuclear genome In billon of years of co-evolution with its host-cell and specialization into an energy-producing organelle, the ancestor of mitochondria lost most of its genetic material.

A putative gene fusion between cox1 and cox2 Cytochrome-c oxidase EC 1. Fig 2. A free-standing rps3 and an intronless rnl The mitochondrial genome of S. Fig 3. Schematic sequence alignment of RPS3 from Pleosporales species.

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Fungal Genomes Project

Fertile ground for introns and homing endonucleases Group I and group II introns are ribozymes that catalyze their splicing from a precursor RNA, restoring the translational reading frame and generating, in this way, a functional product. Table 4. Table 5. Codon usage of the protein-coding genes in the mitochondrial genome of S. Repetitive elements accounted for about 5. Fig 4. Map of the repetitive sequences in the mitochondrial genome of S. Fig 5. Sequence alignment between nad2 and the large duplicated region found in the mitochondrial genome of S.

Lack of synteny among mitochondrial genomes of four representatives of Pleosporales The alignment of the mitochondrial genomes of S. Fig 6.

Whole mitochondrial alignments of four Pleosporales species. Phylogenetic analysis of Pezizomycotina Pezizomycotina is the largest subphylum of Ascomycota that includes remarkably diverse species in terms of their nutritional strategy [ 86 ]. Fig 7.

Genomics of speciation: dissecting mechanisms of reproductive barriers in fungi

Phylogram of Pezizomycotina inferred from the concatenated sequences of 12 mitochondrial-encoded proteins. Conclusions The mitochondrial genome of S. Supporting information. S1 Fig. Sequence alignments of the nuclear-encoded atp8 and atp9 of S. S2 Fig. S3 Fig.

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S1 Table. S2 Table. TargetP 1. References 1. Phylogeny of Stemphylium spp. Accessed Compendium of Tomato Diseases and Pests. Gray leaf spot in peppers caused by Stemphylium solani and S. The Plant Pathology Journal. View Article Google Scholar 5. Ray speck of chrysanthemum caused by Stemphylium lycopersici in Japan. Journal of General Plant Pathology. View Article Google Scholar 6. Leaf spot of kalanchoe caused by Stemphylium lycopersici. Japanese Journal of Phytopathology. View Article Google Scholar 7. Analysis of genetic and virulence variability of Stemphylium lycopersici associated with leaf spot of vegetable crops.

European journal of plant pathology. View Article Google Scholar 8. Cultural and physiological characteristics of Stemphylium lycopersici causing leaf blight disease on vegetable crops. Archives of Phytopathology and Plant Protection. View Article Google Scholar 9. Current microbiology. A survey on tomato leaf grey spot in the two main production areas of Argentina led to the isolation of Stemphylium lycopersici representatives which were genetically diverse and differed in their virulence.

European Journal of Plant Pathology.

Genomics of speciation: dissecting mechanisms of reproductive barriers in fungi

View Article Google Scholar Genome announcements. Chan DC. Mitochondria: dynamic organelles in disease, aging, and development. Basse CW. Mitochondrial inheritance in fungi. Current opinion in microbiology. Mitochondrial genome evolution and the origin of eukaryotes. Annual review of genetics. Fungal evolution: the case of the vanishing mitochondrion.