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Abstract The aim of this study was to assess the effects of a fungicide with 20% metallic copper content on spore germination and gametophyte development in two non-target pteridophyte species: Asplenium scolopendrium and Athyrium filix-femina. The experimental variants were: V1 - 0.1% fungicide in Knop solution, V2 - 0.5% fungicide in Knop solution, V3 - 0.7% fungicide in Knop solution, and the Control variant (C) - Knop solution. The fungicide used affected spore germination in all the tested variants. The lowest germination percentages were registered in the species Asplenium scolopendrium: V1 - 69.33%, V2 - 65.66%, V3 - 51.33%. In terms of gametophyte differentiation, the experiments led to delays in developmental stages, absence of rhizoids and necrosis of prothallic cells. The results of the study can be used to assess the impact of the fungicide on the ecosystems in which it is applied, ecosystems where pteridophytes are also present or ecosystems adjacent to them.

The influence of a Copper-Containing Funcicide on the Gametophyte of Some Non-Target Pteridophyte Species