| saprobic characteristics of three fungal taxa from ericalean roots and their association with the roots of rhododendron groenlandicum and picea mariana in culture. | simultaneous associations among ectotrophic and ericoid mycorrhizal hosts and their mycorrhizal fungi are expected in boreal bogs where ericaceous shrubs and conifers coexist rooted in an organic matrix dominated by sphagnum mosses. we were thus prompted to examine, in vitro, the abilities of three ericoid mycorrhizal fungi [ hymenoscyphus ericae, oidiodendron maius, and variable white taxon (vwt)] to associate with picea mariana (pinaceae), with both p. mariana and rhododendron groenlandicum (e ... | 2002 | 12189471 |
| cu,zn superoxide dismutase and zinc stress in the metal-tolerant ericoid mycorrhizal fungus oidiodendron maius zn. | the sequence encoding a superoxide dismutase (sod) was isolated from the cdna library of a zinc-tolerant strain of the ericoid mycorrhizal fungus oidiodendron maius, grown under zinc-stress conditions. sequence homology to other sods strongly suggests that it is a copper- and zinc-containing sod. functional complementation assays showed that the gene confers increased tolerance to zinc and copper stress to a cu,znsod-defective yeast mutant. monitoring of transcript and protein levels following z ... | 2009 | 19278525 |
| the relative ability of fungi from sphagnum fuscum to decompose selected carbon substrates. | nine species from a suite of 55 microfungi isolated from living and decomposing sphagnum fuscum were selected for studies of in vitro decomposition of tannic acid, cellulose, and starch. in vitro decomposition of s. fuscum plants and spruce wood chips was also examined. oidiodendron maius and oidiodendron scytaloides degraded tannic acid, giving a positive reaction for polyphenol oxidases. most taxa degraded cellulose and starch via the synthesis of cellulases and amylase, respectively. mass los ... | 2002 | 11989764 |
| influence of zinc ions on protein secretion in a heavy metal tolerant strain of the ericoid mycorrhizal fungus oidiodendron maius. | a heavy metal tolerant strain of the ericoid mycorrhizal species oidiodendron maius, isolated from soil heavily contaminated with zinc, was previously shown to tolerate high concentrations of zinc and cadmium ions in the growth medium. we have investigated some of the specific molecular responses of this fungal strain to the presence of increasing concentrations of zinc ions in the growth medium. in particular, we show that zinc ions induce a general change in the array of secreted proteins, wit ... | 2002 | 11952161 |
| a plac8-containing protein from an endomycorrhizal fungus confers cadmium resistance to yeast cells by interacting with mlh3p. | cadmium is a genotoxic pollutant known to target proteins that are involved in dna repair and in antioxidant defence, altering their functions and ultimately causing mutagenic and carcinogenic effects. we have identified a plac8 domain-containing protein, named omfcr, by a yeast functional screen aimed at identifying genes involved in cadmium resistance in the endomycorrhizal fungus oidiodendron maius. omfcr shows a remarkable specificity in mediating cadmium resistance. both its function and it ... | 2011 | 21672957 |
| genomic suppression subtractive hybridization as a tool to identify differences in mycorrhizal fungal genomes. | characterization of genomic variation among different microbial species, or different strains of the same species, is a field of significant interest with a wide range of potential applications. we have investigated the genomic variation in mycorrhizal fungal genomes through genomic suppressive subtractive hybridization. the comparison was between phylogenetically distant and close truffle species (tuber spp.), and between isolates of the ericoid mycorrhizal fungus oidiodendron maius featuring d ... | 2011 | 21362020 |
| diversity of culturable ericoid mycorrhizal fungi of rhododendron decorum in yunnan, china. | the diversity of ericoid mycorrhizal fungi isolated from rhododendron decorum franch. in yunnan, southwestern china, was examined for the first time. in total 300 hair-root samples were collected from 13 r. decorum individuals in two adjacent wild population sites and one cultivated population site. two hundred eighteen slow-growing isolates were obtained; the ability of some to form ericoid mycorrhiza was tested in vitro. one hundred twenty-five isolates formed hyphal structures morphologically ... | 2011 | 21289105 |
| specific regions in the sod1 locus of the ericoid mycorrhizal fungus oidiodendron maius from metal-enriched soils show a different sequence polymorphism. | the huge diversity of fungi may reflect both the heterogeneity of the niches they occupy and the diverse stresses they must cope with. in order to investigate the genetic and functional diversity in the ericoid mycorrhizal fungus oidiodendron maius subjected to heavy metal stress, we isolated o. maius strains from a serpentine site naturally enriched by heavy metals. despite the high cr and ni soil concentrations, a high level of diversity was found in the serpentine fungal community. the growth ... | 2010 | 21155849 |
| sod1-targeted gene disruption in the ericoid mycorrhizal fungus oidiodendron maius reduces conidiation and the capacity for mycorrhization. | the genome sequences of mycorrhizal fungi will provide new opportunities for studying the biology and the evolution underlying this symbiotic lifestyle. the generation of null mutants at the wild-type loci is one of the best methods for gene-function assignment in the post-genomic era. to our knowledge, the generation of superoxide dismutase 1 (sod1)-null mutants in the ericoid mycorrhizal fungus oidiodendron maius is the first example of a gene-targeted disruption via homologous recombination i ... | 2009 | 19810810 |
| diversity of root-associated fungal endophytes in rhododendron fortunei in subtropical forests of china. | to investigate the diversity of root endophytes in rhododendron fortunei, fungal strains were isolated from the hair roots of plants from four habitats in subtropical forests of china. in total, 220 slow-growing fungal isolates were isolated from the hair roots of r. fortunei. the isolates were initially grouped into 17 types based on the results of internal transcribed spacer-restriction fragment length polymorphism (its-rflp) analysis. its sequences were obtained for representative isolates fr ... | 2009 | 19396474 |
| imaging mycorrhizal fungal transformants that express egfp during ericoid endosymbiosis. | ericoid endomycorrhizal fungi form intracellular associations with the epidermal root cells of plants belonging to ericales. in natural environments, these fungi increase the ability of their host plants to colonise soils polluted with toxic metals, although the underlying mechanisms are not clearly understood. genetic transformation is a powerful tool to study the function of specific genes involved in the interaction of symbiotic fungi with the host plants and with the environment. here, we in ... | 2007 | 17589849 |
| gene expression of the ericoid mycorrhizal fungus oidiodendron maius in the presence of high zinc concentrations. | a heavy metal tolerant strain of the ericoid mycorrhizal species oidiodendron maius, isolated from roots of vaccinium myrtillus growing in soil heavily contaminated with zinc, was previously shown to tolerate high concentrations of zinc and cadmium ions in the growth medium. we have investigated the genetic basis of this fungal strain tolerance to high zinc concentrations by using an untargeted approach. from a cdna library constructed by using mrna from zn-treated o. maius mycelia, 444 clones w ... | 2005 | 15558329 |