“…In the present study, the differences among provenances, were found to be statistically significant for all ten measured stomatal parameters (Table 2). This result suggests a high genetic diversity of European beech, which has been already evidenced with respect to certain anatomical (STOJNIĆ et al, 2016a;HAJEK et al, 2016), morphological (IVANKOVIĆ et al, 2011MEKIĆ et al, 2010), phenological (CHMURA and ROZKOWSKI, 2002;BALLIAN et al, 2015) and physiological (STOJNIĆ et al, 2010;KUČEROVÁ et al, 2018) traits. The difference between provenances, applies to different functional traits, are assumed to be the result of the various genetic architecture of provenances, which has evolved as a result of local adaptation, in response to diverse selective pressure in areas of beech distribution (JUMP et al, 2006;STILL et al, 2005;STOJNIĆ et al, 2016b).…”