Fungal Genetics and Biology
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From the Guest Editors
Expressed sequence tags and genes associated with loline alkaloid expression by the fungal endophyte Neotyphodium uncinatum
Loline alkaloids (LA), which are 1-aminopyrrolizidines with an oxygen bridge, are produced by Epichloe¨ (anamorph=Neotyphodium) species, endophytes of grasses. LA are insecticidal, thus, helping to protect host plants from insect herbivory. The objective of this study was to identify genes associate...
A high-affinity ammonium transporter from the mycorrhizal ascomycete Tuber borchii
An ammonium transporter cDNA, named TbAMT1, was isolated from the ectomycorrhizal ascomycetous truffle Tuber borchii. The polypeptide encoded by TbAMT1 (52kDa) functionally complements ammonium uptake-defective yeast mutants and shares sequence similarity with previously characterized ammonium transp...
Distribution and localization of microsatellites in the Perigord black truffle genome and identification of new molecular markers.
We surveyed the T. melanosporum genome (1) to characterise its SSR pattern; (2) to compare it with SSR patterns found in 48 other fungal and three oomycetes genomes and (3) to identify new polymorphic SSR markers for population genetics. The T. melanosporum genome is rich in SSRs with 22,425 SSRs wi...
Hyphal and cytoskeleton polarization in Tuber melanosporum: a genomic and cellular analysis.
We have explored the Tuber melanosporum genome sequence by searching for homologs of genes known to play crucial roles in the morphogenesis and cell polarity of yeasts and filamentous fungi. One hundred and forty-nine genes have been identified and functionally grouped according to the deduced amino...
Distribution, expression and expansion of Aspergillus fumigatus LINE-like retrotransposon populations in clinical and environmental isolates...
We investigate, in clinical and environmental isolates, the structure and distribution of a specific class of A. fumigatus long interspersed nuclear element (LINE)-like retrotransposons occupying subtelomeric loci in the A. fumigatus genome, and probe their stability in response to laboratory- and h...
Combinatorial function of velvet and AreA in transcriptional regulation of nitrate utilization and secondary metabolism.
We report a previously unrecognized role of the velvet complex in regulation of nitrate metabolism. F. oxysporum mutants lacking VeA or LaeA, two key components of the complex, were impaired in growth on the non-preferred nitrogen sources nitrate and nitrite. Both velvet and the general nitrogen res...
The Coprinopsis cinerea septin Cc.Cdc3 is involved in stipe cell elongation.
We have identified and characterized a Coprinopsis cinerea mutant defective in stipe elongation during fruiting body development. In the wild-type, stipe cells elongate at the maturation stage of fruiting, resulting in very slender cells. In the mutant, the stipe cells fail to elongate, but become r...
Ecm7, a regulator of HACS, functions in calcium homeostasis maintenance, oxidative stress response and hyphal development in Candida albican...
We report that Ecm7, a regulator of HACS, plays important roles in calcium homeostasis maintenance, oxidative stress response and hyphal development in Candida albicans. Disruption of ECM7 led to increased sensitivity to calcium-depleted conditions. Flow cytometry analysis revealed that Ecm7 mediate...