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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Charron, Philippe Hijri, Mohamed Koul, Raman Gilbert, Luz B. Gianinazzi-pearson, Vivienne Requena, Natalia Symeonidi, Aikaterini Ndikumana, Steve Martin, Francis San Clemente, Hélène Kuo, Alan Paszkowski, Uta Herr, Joshua R. Henrissat, Bernard Shapiro, Harris Young, Peter W. Malbreil, Mathilde Riley, Rohan Kawaguchi, Masayoshi Morin, Emmanuelle Sanders, Ian R. Rensing, Stefan A. Van Tuinen, Diederik Frei Dit Frey, Nicolas Krajinski, Franziska Shachar-hill, Yair Y. Saito, Katsuharu Handa, Yoshihiro Kohler, Annegret Tuskan, Gerald A. Young, J. Peter W. Masclaux, Frederic G. Tisserant, Emilie Lammers, Peter J. Bécard, Guillaume Balestrini, Raffaella Pagni, Marco Murat, Claude Rosikiewicz, Pawel Petitpierre, Denis Grigoriev, Igor V. Duensing, Nina Corradi, Nicolas Bonfante, Paola Roux, Christophe |
| Description | Author Affiliation: Tisserant E ( Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1136, Interactions Arbres/Microorganismes, Centre de Nancy, Université de Lorraine, 54280 Champenoux, France.); |
| Abstract | The mutualistic symbiosis involving Glomeromycota, a distinctive phylum of early diverging Fungi, is widely hypothesized to have promoted the evolution of land plants during the middle Paleozoic. These arbuscular mycorrhizal fungi (AMF) perform vital functions in the phosphorus cycle that are fundamental to sustainable crop plant productivity. The unusual biological features of AMF have long fascinated evolutionary biologists. The coenocytic hyphae host a community of hundreds of nuclei and reproduce clonally through large multinucleated spores. It has been suggested that the AMF maintain a stable assemblage of several different genomes during the life cycle, but this genomic organization has been questioned. Here we introduce the 153-Mb haploid genome of Rhizophagus irregularis and its repertoire of 28,232 genes. The observed low level of genome polymorphism (0.43 SNP per kb) is not consistent with the occurrence of multiple, highly diverged genomes. The expansion of mating-related genes suggests the existence of cryptic sex-related processes. A comparison of gene categories confirms that R. irregularis is close to the Mucoromycotina. The AMF obligate biotrophy is not explained by genome erosion or any related loss of metabolic complexity in central metabolism, but is marked by a lack of genes encoding plant cell wall-degrading enzymes and of genes involved in toxin and thiamine synthesis. A battery of mycorrhiza-induced secreted proteins is expressed in symbiotic tissues. The present comprehensive repertoire of R. irregularis genes provides a basis for future research on symbiosis-related mechanisms in Glomeromycota. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 50 |
| Volume Number | 110 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2013-12-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Evolution, Molecular Genome, Fungal Genetics Glomeromycota Mycorrhizae Plants Microbiology Symbiosis Molecular Sequence Data Sequence Analysis, DNA Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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