Exudate Flavonoids of Primula veris Leaves and Their Inhibitory Activity on Lolium perrene Seed Germination

In the present study exudate flavonoids from P. veris leaves were identified and their potential as inhibitors on L. perrene seed germination was evaluated. Leaves of collected natural population. Leaf obtained by dipping whole into acetone for 2--3 min. Chemical composition analysed GC/MS. The test done in Petri dishes. Flavonoid aglycones found main components (over 50% all compounds). Unsubstituted flavone, 2'-methoxyflavone, 3'-methoxyflavone, 3',4'-dimethoxyflavone, 2',5'-dimethoxyflavone, 5,6,2',6'- tetramethoxyflavone identified. Complete inhibition Lolium perenne root elongation aqueous solution at concentration 7 mg/mL found. This is first report about inhibitory activity leaf germination.