Fungal Genetics and Biology
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Functional characterisation and transcript analysis of an alkaline phosphatase from the arbuscular mycorrhizal fungus Funneliformis mosseae.
We isolated a full-length cDNA (FmALP) from the AM fungus Funneliformis mosseae (syn. Glomus mosseae) showing similarity with putative ALP genes from Rhizophagus intraradices (syn. Glomus intraradices) and Gigaspora margarita. For functional characterisation FmALP was expressed heterologously in the...
ECM17-dependent methionine/cysteine biosynthesis contributes to biofilm formation in Candida albicans.
We studied the role of Met/Cys biosynthesis pathway by disrupting ECM17, a gene encoding sulfite reductase in C. albicans. It was found that the ecm17Δ/Δ mutant failed to catalyze the biochemical reaction from sulfite to H(2)S and hardly grew in media lacking Met and Cys. NaSH, the donor of H(2)S, d...
Reproductive mode and life cycle of the ash dieback pathogen Hymenoscyphus pseudoalbidus.
Ash dieback caused by the fungal pathogen Hymenoscyphus pseudoalbidus is currently ravaging in Europe, killing Fraxinus excelsior and Fraxinus angustifolia trees of all age classes. The aim of this work was to elucidate aspects of the reproduction biology of this fungal pathogen and its cryptic, non...
A potential role for an extracellular methanol oxidase secreted by Moniliophthora perniciosa in Witches' broom disease in cacao.
The hemibiotrophic basidiomycete fungus Moniliophthora perniciosa, the causal agent of Witches' broom disease (WBD) in cacao, is able to grow on methanol as the sole carbon source. In plants, one of the main sources of methanol is the pectin present in the structure of cell walls. Pe...
Roles for SKN7 response regulator in stress resistance, conidiation and virulence in the citrus pathogen Alternaria alternata.
We report here independent and shared functions of the SKN7-mediated signaling pathway with HSK1 and HOG1. SKN7, a putative transcription downstream regulator of HSK1, is primarily required for cellular resistance to oxidative and sugar-induced osmotic stress. SKN7, perhaps acting in parallel with H...
K(+) uptake systems in the yeast Hansenula polymorpha. Transcriptional and post-translational mechanisms involved in high-affinity K(+) tran...
We have identified the two main K(+) transporters in the yeast Hansenula polymorpha. So far this is the only yeast with these transporters amenable to molecular genetic analysis. Two ORF-encoding permeases with high similarity to Trk1 and Hak1 are present in the genome of this yeast. Deletion of eit...
A method for making directed changes to the Fusarium graminearum genome without leaving markers or other extraneous DNA.
We designed a cloning vehicle with a built-in hygromycin-resistance marker (hygB) which can be used to transform the fungus, and with cloning sites to carry DNA with any desired genomic modifications. To effect a desired genomic change the sequence changes of interest are incorporated between two ad...
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Fusarium oxysporum Adh1 has dual fermentative and oxidative functions and is involved in fungal virulence in tomato plants.
An alcohol dehydrogenase gene, adh1, has been identified in the vascular wilt fungus Fusarium oxysporum f. sp. lycopersici. Reverse transcription polymerase chain reaction (RT-PCR) analysis revealed that adh1 is highly expressed in mycelia grown in potato dextrose liquid medium (PDB) under hypoxic c...
Expression and functional characterisation of TNC, a high-affinity nickel transporter from Neurospora crassa.
Our previous in silico studies identified a high-affinity nickel transporter, TNC, from the metal transportome of Neurospora crassa. A knockout mutant of the tnc gene in N. crassa failed to transport nickel, showed phenotypic growth defects and diminished urease activity under physiological levels o...