Search results for "arbuscular mycorrhizal fungi"
showing 10 items of 59 documents
Arbuscular mycorrhizal fungi, partners of the rhizostabilization proccess of an orphan mining site
2012
International audience
Ribosomal sequences as a tool to study and monitor arbuscular mycorrhizal fungi
2002
International audience
Is this fungus everywhere? Elucidating the genetic structure of populations of the arbuscular mycorrhizal fungus Glomus intraradices
2010
Arbuscular mycorrhizal fungi (Glomeromycota) are ubiquitous mutualistic associates of plants. Only relatively recently it has become possible to study the population biology of some species of these fungi. The model organism Glomus intraradices has been found across an extremely wide range of habitats and succession stages on different continents using molecular identification approaches. We used regions of the mitochondrially-encoded rDNA as novel molecular markers to resolve the intraspecies structure of G. intraradices and found a high diversity of mitochondrial haplotypes among isolates from all over the world. These markers for the first time also offer to genotype G. intraradices dire…
Diversity of arbuscular mycorrhizal fungi (Glomeromycota) in european soils analysed by pyrosequencing
2012
Arbuscular mycorrhiza provides essential ecosystem functions in natural and humandominated ecosystems. Generally human activities like agriculture seem to have a negative effect on diversity of arbuscular mycorrhizal fungi (AMF), and thus on ecosystem functioning. New sequencing technologies now allow to assess AMF diversity on a much larger scale than previously. In the context of the European project EcoFINDERS, five Long-Term Observatories across Europe with different soil management have been studied. The diversity of AMF in these soils is analyzed by pyrosequencing, using the ITS (rDNA Internal Transcribed Spacers) as marker, which were recently determined as the standard barcoding gen…
The arbuscular mycorrhizal fungi as soil quality indicator. Application to trace elements contaminated soil
2007
The use of genomic repeated sequences to characterize arbuscular mycorrhizal fungi
2002
International audience
Mitochondrial genotyping of isolates of the arbuscular mycorrhizal fungus "Glomus intraradices" from the isolate collection of the International Bank…
2011
International audience; The culture collection of the International Bank of Glomeromycota (BEG) provides an important service to scientific community and industry by acting as a repository for well-defined AMF isolates which are made available to the public. The most widely-used species has been referred to as "Glomus intraradices", and was recently renamed Rhizophagus irregularis. This species has emerged as a model organism for experimental research and is the subject of the first AMF genome to be sequenced. The only genetic marker that can currently be used to distinguish strains of R. irregularis in field settings is the mitochondrial large subunit (mtLSU). In addition, genetically dist…
Molecular studies of diversity of populations of arbuscular mycorrhizal fungi
2011
National audience; Arbuscular mycorrhiza fungi (AMF) which form a mutualistic symbiosis with most terrestrial plants are not only important for natural ecosystems, but also for agricultural production. The aim of this study is to characterize fungal populations at different geographic scales in order to better understand the processes influencing AMF taxonomic and functional diversity and to determine the environmental factors affecting AMF populations, especially in the context of agricultural management. The mitochondrial large subunit gene of ribosomal RNA will be used as molecular marker to resolve population structure of Rhizophagus irregularis (formerly known as Glomus intraradices). …
Expression of Sorghum bicolor ammonium transporters upon colonization with arbuscular mycorrhizal fungi
2012
Arbuscular mycorrhizal fungi (AMF) are important plant symbionts, trading mineral nutrients beyond the reach of roots, in particular ammonium, in exchange to their host’s photosynthetic products. Sorghum bicolor is one of the world's leading cereal crops, providing food, fibre and fuel across a range of environments and production systems. It has a particular ability to be productive even under strongly adverse conditions, tolerating much more severe drought than most other grain crops. As its genome has recently been sequenced, we have characterized all eight members of the ammonium transporter (AMT) family and studied their expression in different tissues of field-grown plants. While most…
Impact of the growth of different maize genotypes on arbuscular mycorrhizal fungi
2001
International audience