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Insight into trade-off between wood decay and parasitism from the genome of a fungal forest pathogen.

Ake Olson 1 Andrea Aerts 2 Fred Asiegbu 3 Lassaâd Belbahri 4 Ourdia Bouzid 5 Anders Broberg 6 Björn Canbäck 1 Pedro M Coutinho 7 Dan Cullen 8 Kerstin Dalman 1 Giuliana Deflorio 9 Linda T A van Diepen 10 Christophe Dunand 11 Sébastien Duplessis 12 Mikael Durling 1 Paul Gonthier 13 Jane Grimwood 14 Carl Gunnar Fossdal 15 David Hansson 1 Bernard Henrissat 7 Ari Hietala 15 Kajsa Himmelstrand 1 Dirk Hoffmeister 16 Nils Högberg 1 Timothy Y James 10 Magnus Karlsson 1 Annegret Kohler 12 Ursula Kues 17 Yong-Hwan Lee 18 Yao-Cheng Lin 19 Mårten Lind 1 Erika Lindquist 2 Vincent Lombard 7 Susan Lucas 2 Karl Lundén 1 Emmanuelle Morin 12 Claude Murat 12 Jongsun Park 18 Tommaso Raffaello 3 Pierre Rouzé 19 Asaf Salamov 2 Jeremy Schmutz 14 Halvor Solheim 15 Jerry Ståhlberg 1 Heriberto Vélëz 1 Ronald P de Vries 5, 20 Ad Wiebenga 20 Steve Woodward 9 Igor Yakovlev 15 Matteo Garbelotto 21 Francis Martin 12 Igor V. Grigoriev 2 Jan Stenlid 1
Abstract : Parasitism and saprotrophic wood decay are two fungal strategies fundamental for succession and nutrient cycling in forest ecosystems. An opportunity to assess the trade-off between these strategies is provided by the forest pathogen and wood decayer Heterobasidion annosum sensu lato. We report the annotated genome sequence and transcript profiling, as well as the quantitative trait loci mapping, of one member of the species complex: H. irregulare. Quantitative trait loci critical for pathogenicity, and rich in transposable elements, orphan and secreted genes, were identified. A wide range of cellulose-degrading enzymes are expressed during wood decay. By contrast, pathogenic interaction between H. irregulare and pine engages fewer carbohydrate-active enzymes, but involves an increase in pectinolytic enzymes, transcription modules for oxidative stress and secondary metabolite production. Our results show a trade-off in terms of constrained carbohydrate decomposition and membrane transport capacity during interaction with living hosts. Our findings establish that saprotrophic wood decay and necrotrophic parasitism involve two distinct, yet overlapping, processes.
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Ake Olson, Andrea Aerts, Fred Asiegbu, Lassaâd Belbahri, Ourdia Bouzid, et al.. Insight into trade-off between wood decay and parasitism from the genome of a fungal forest pathogen.. New Phytologist, Wiley, 2012, 194 (4), pp.1001-1013. ⟨10.1111/j.1469-8137.2012.04128.x⟩. ⟨hal-02649642⟩



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