Plant material
For the extraction of compounds, the leaves collected on the plantation
were used in the first year after its establishment, on the fluvisol
developed on Vistula river deposites, class I, in the village Łęka,
Lublin Province, Poland (21 ° 54′N, 51 ° 27′E).
Qualitative and quantitative analyses of the morphological parts:
leaves, twigs, flowers and fruits were performed on plant material
collected on a 5-year-old plantation located on sandy land, class IV,
Września-Wielkopolska-Poland (52 ° 20’40.7 ”N 17 ° 36 ’ 28.6 ”E).
Plants after harvest were frozen and freeze-dried (Gamma 2-16 LSC,
Christ, Germany). Reference samples are stored at the Institute of Soil
Science and Plant Cultivation.