Rosmarinic acid content in selected varieties of sage (Salvia officinalis L.)

The aim of this thesis was to find the content of rosmarinic acid (RA) in the selected varieties of sage (Salvia officinalis L.): 'Krajova', 'Purpurascens', 'Berggarten', 'Tricolor', 'Icterina' and 'Alba'. In the monitoring years 2013-2015 and two collection dates was found that the highest RA content was in 'Tricolor' in 2013 (30,084.65 mg*kg(-1)) collected in the first term. The lowest value was recorded for the 'Berggarten' (9,000.5 mg*kg(-1)) in 2015 in the second collection date. The highest average RA content was found in 'Tricolor' (19,605.82 mg*kg(-1)), while the lowest RA content was in 'Berggarten' (14,610.71 mg*kg(-1)). When the terms of collection were compared, there were confirmed statistically significant difference in RA content in the monitored varieties of sage (P<0.001) between 1st time of harvesting (22,516.08 mg*kg(-1)) and 2 nd time of harvesting (11,155.83 mg*kg(-1)). Within years was the lowest content of the RA (13,562.74 mg*kg(-1)) found in 2015 and the difference in the RA content this year compared to 2013 and 2014 was statistically significant (P<0.001). Average RA values in the monitored varieties of sage in 2013 (17,624.12 mg*kg(-1)) and in 2014 (17,522.69 mg*kg(-1)) were not statistically significant. These results follow, that the content of RA in sage (Salvia officinalis L.) statistically significantly affected the variety, time of harvesting and growing year.