The leaf traits, leaf chlorophyll content and parameters of the Chl a fluorescence tor grass Brachypodium pinnatum from population of different age: young (30–50 years old), intermediate age (ca. 100 years) and old(> 300 years).

The means of for each populations are presented. and means±SE for the particular age classes were compared with ANOVA, followed with Tukey post-hoc test. Values with the same letters are not significantly different at p leaf length, LW—leaf width. Other abbreviations in Table 1. Locality: Rac–Racławice, Pow1 –Powroznikowa 1, Pow2 –Powroznikowa 2, WilSk–Wilisowe Skały, Kob–Dolina Kobylanska, Żyt–Zytnia, WielSk–Wielskie Skały, Bolech–Bolechowice, Gro_Onob–Grodzisko Onobrychis, Bedk–Dolina Bedkowska, DKluc–Dolina Kluczwody, Gro–Grodzisko.