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Keywords = ascohymenials

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26 pages, 4753 KB  
Article
Mutations in Podospora anserina MCM1 and VelC Trigger Spontaneous Development of Barren Fruiting Bodies
by Insaf Essadik, Charlie Boucher, Cécilia Bobée, Éva Cabet, Valérie Gautier, Hervé Lalucque, Philippe Silar, Florence Chapeland-Leclerc and Gwenaël Ruprich-Robert
J. Fungi 2024, 10(1), 79; https://doi.org/10.3390/jof10010079 - 19 Jan 2024
Cited by 2 | Viewed by 2400
Abstract
The ascomycete Podospora anserina is a heterothallic filamentous fungus found mainly on herbivore dung. It is commonly used in laboratories as a model system, and its complete life cycle lasting eight days is well mastered in vitro. The main objective of our team [...] Read more.
The ascomycete Podospora anserina is a heterothallic filamentous fungus found mainly on herbivore dung. It is commonly used in laboratories as a model system, and its complete life cycle lasting eight days is well mastered in vitro. The main objective of our team is to understand better the global process of fruiting body development, named perithecia, induced normally in this species by fertilization. Three allelic mutants, named pfd3, pfd9, and pfd23 (for “promoting fruiting body development”) obtained by UV mutagenesis, were selected in view of their abilities to promote barren perithecium development without fertilization. By complete genome sequencing of pfd3 and pfd9, and mutant complementation, we identified point mutations in the mcm1 gene as responsible for spontaneous perithecium development. MCM1 proteins are MADS box transcription factors that control diverse developmental processes in plants, metazoans, and fungi. We also identified using the same methods a mutation in the VelC gene as responsible for spontaneous perithecium development in the vacua mutant. The VelC protein belongs to the velvet family of regulators involved in the control of development and secondary metabolite production. A key role of MCM1 and VelC in coordinating the development of P. anserina perithecia with gamete formation and fertilization is highlighted. Full article
(This article belongs to the Section Fungal Genomics, Genetics and Molecular Biology)
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