IDENTIFICATIONS OF PHENOLIC COMPOUNDS AND ALLELOPATHIC EFFECT OF Glycyrrhiza glabra ON GERMINATION AND SEEDLING GROWTH Phalaris minor

The present study was planned to identify the phenolic compounds and allelopathic effect of Glycyrrhiza glabra on germination and seedling growth Phalaris minor at Weed Science Laboratory, Department of Agronomy, University of Agriculture, Faisalabad during winter 2018. The experiments were laid out under a completely randomized design (CRD), having three replicates. In this study seven different concentrations of G. glabra aqueous extracts (0%, 0.25%, 0.5%, 10%, 20%, 40%, and 80%) applied on winter weed P.  minor.  Data on regarding germination percentage (%), mean Germination time (days), time to 50% germination, root length (mm), shoot length (mm), root fresh weight (mg), shoot fresh weight was recorded following standard procedures. Data were analyzed using Fishers Analysis of Variance. The differences among treatments were separated using a least significant difference test (LSD). Results of experiment revealed that maximum germination percentage (%), Mean Germination time (Days), Time to 50% germination and minimum, root length (mm), shoot length (mm), root fresh weight (mg), shoot fresh weight of p. minor was recorded at 80 % concentration of G.  glabra.  From the present study, it is concluded that there are phenolic compounds in the wood extract of Glycyrrhiza glabra which cause allelopathic effects on P. minor.