L’équipe Guichet a contribué à la publication d’un chapitre de livre:
Résumé :
This chapter explores the genetic and cellular mechanisms governing sexual reproduction in fungi, with a focus on Ascomycota and Basidiomycota. Sexual reproduction is orchestrated by the genetic regulation of mating identity, which ensures the recognition and differentiation of compatible partners. Communication between cells is mediated by chemotropic molecules and signaling pathways that guide partner attraction and fusion. Upon contact, plasmogamy initiates cytoplasmic merger without immediate nuclear fusion, giving rise to the dikaryotic phase where two distinct nuclei share a common cytoplasm. Subsequent karyogamy unites these nuclei into a diploid state, which immediately undergoes meiosis to generate genetic diversity. Prior to meiotic division, fungi deploy surveillance and defense mechanisms to eliminate selfish and invasive genomic elements, safeguarding genome integrity. Meiosis results in the formation of ascospores, accompanied by organelle remodeling that ensures faithful partitioning of cellular components. Processes such as spore degeneration and meiotic drive may further shape transmission outcomes. These developmental stages occur largely within fruiting bodies, intricate multicellular structures specialized for spore production and dispersal. Through these tightly regulated developmental processes, fungi achieve both genetic innovation and reproductive success, highlighting the evolutionary sophistication of their sexual cycle.
Leonardo Peraza-Reyes, Sylvain Brun, Pierre Grognet & Fabienne Malagnac, Growth, Differentiation and Sexuality, 01 April 2026, https://doi.org/10.1007/978-3-032-15548-1_13