Mycosphaerella
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA212722 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| Other | ||||
| SRR1205212_1.fastq.gz | Fastqsanger.gz | |||
| SRR1205212_2.fastq.gz | Fastqsanger.gz | |||
| SRR1205216_1.fastq.gz | Fastqsanger.gz | |||
| SRR1205216_2.fastq.gz | Fastqsanger.gz |
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Project description:In order to gain a first insight into the Mycosphaerella graminicola global transcriptome in different nutritional environments, we performed initial experiments on two in vitro growth conditions during log-phase growth and on infected plant material twenty-eight days after inoculation. In vitro log phase growth in nutrient-rich Potato Dextrose Broth (PDB) was used as a control in independent comparisons with 1) log phase growth in nutrient-limiting Czapek-Dox Broth (CDB) and 2) twenty-eight days of plant infection. Growth in PDB results in a rapid budding type growth of the M. graminicola sporidia. Growth in CDB is phenotypically similar in that the fungus continues to grow as budding sporidia but this occurs at approximately 20% of the rate in PDB. In contrast, late stage infected plant material contains fungus growing as filamentous hyphae, generating pycnidia and sporulating. At this stage the plant material is completely senesced and the RNA isolated from this tissue is entirely of fungal origin. The complete lack of plant RNA enabled the microarray comparison to be made against growth in PDB. In order to generate statistically significant data for further analysis sixteen independent microarray blocks were hybridised for each experiment. Within these sixteen replicates were three biological repeats. For data analysis we employed limits of a two-fold cut-off in expression based upon statistical analysis of the replicate hybridisations (P <0.01).
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Project description:Mycosphaerella, one of the largest genera of ascomycetes, encompasses several thousand species and has anamorphs residing in more than 30 form genera. Although previous phylogenetic studies based on the ITS rDNA locus supported the monophyly of the genus, DNA sequence data derived from the LSU gene distinguish several clades and families in what has hitherto been considered to represent the Mycosphaerellaceae. Several important leaf spotting and extremotolerant species need to be disposed to the genus Teratosphaeria, for which a new family, the Teratosphaeriaceae, is introduced. Other distinct clades represent the Schizothyriaceae, Davidiellaceae, Capnodiaceae, and the Mycosphaerellaceae. Within the two major clades, namely Teratosphaeriaceae and Mycosphaerellaceae, most anamorph genera are polyphyletic, and new anamorph concepts need to be derived to cope with dual nomenclature within the Mycosphaerella complex.
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