Changes in chromosome morphology during the mitotic prophase in the ascus of the apomictic ascomycete, Podospora arizonensis

Mainwaring, Henry R.

doi:10.1007/bf00407691

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2021

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“…In this model, few Δmat nuclei could end up in ascus mother cells, divide by mitosis, and produce few ascospores ( Figure 5 ). Note that Arnium arizonese (= Podospora arizonensis ), a close relative of P. anserina , reproduces exclusively by apomixis ( Mainwaring 1971 ).…”

Section: Resultsmentioning

confidence: 99%

Important role of melanin for fertility in the fungus Podospora anserina

Gautier

Levert

Giraud

et al. 2021

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Melanins are pigments used by fungi to withstand various stresses and to strengthen vegetative and reproductive structures. In Sordariales fungi, their biosynthesis starts with a condensation step catalyzed by an evolutionary-conserved polyketide synthase. Here we show that complete Inactivation of this enzyme in the model ascomycete Podospora anserina through targeted deletion of the PaPks1 gene results in reduced female fertility, in contrast to a previously analyzed nonsense mutation in the same gene that retains full fertility. We also show the utility of PaPks1 mutants for detecting rare genetic events in P. anserina, such as parasexuality and possible fertilization and/or apomixis of nuclei devoid of mating type gene.

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Section: Resultsmentioning

confidence: 99%