Journal
MOLECULAR PLANT PATHOLOGY
Volume 13, Issue 5, Pages 508-518Publisher
WILEY
DOI: 10.1111/j.1364-3703.2011.00764.x
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Funding
- Deutsche Forschungsgemeinschaft (DFG)
- Federal Ministry of Education and Research (BMBF)
- Forderfonds Forschung of the Justus Liebig University
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Piriformospora indica is a basidiomycete of the order Sebacinales, representing a model for the study of mutualistic symbiosis and, beyond that, the plant immune system. The fungus colonizes the roots of a wide range of vascular plants, increasing their growth, seed yield and adaptation to abiotic and biotic stresses. The fungal colonization of roots begins with a biotrophic growth phase, in which living cells are colonized, and continues with a cell death-dependent phase, in which root cells are actively killed by the fungus. The complexity of sebacinalean symbiosis is further enhanced by the presence of endocellular bacteria which may represent significant determinants for a successful outcome of the symbioses. Molecular ecological analyses have revealed an exceptional relevance of sebacinoid fungi in natural ecosystems worldwide. This natural competence could be rooted in their phenotypic adaptability, which, for instance, allows P. indica to grow readily on various synthetic media and to colonize distinct hosts. In molecular and genetic studies, P. indica's mutualistic colonization strategy has been partly unravelled, showing that the jasmonate pathway is exploited for immune suppression and successful development in roots. Research on P. indica supports efforts to make the bioprotective potential of the fungus accessible for agricultural plant production. The decoding of P. indica's genome has revealed its potential for application as bioagent and for targeted improvement of crop plants in biotechnology-based approaches.
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