We have examined thermal control for embryo growth and seed germination in European ash. Using historical data (span of 36 years) of embryo index in matured seeds, we showed that maturation is not influenced by the annual average temperature. Secondary dormancy in ash’s seeds is easily induced, and the thermal window for both embryo growth and seed germination was between 10 and 20 °C.
Germination niche; Seeds; Threshold models; Cardinal temperatures; Embryo growth
Wawrzyniak, M.K., Ley-López, J.M., Martins, J.P. et al. Limiting temperatures of embryo growth and seed germination of Fraxinus excelsior L. (Oleaceae): a threshold model approach. Annals of Forest Science 80, 38 (2023). https://doi.org/10.1186/s13595-023-01205-8
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Data and/or Code availability
The datasets generated and analyzed during the current study are available in the Figshare repository: https://doi.org/10.6084/m9.figshare.23791512.v4