Abstract:

In this paper, the study aimed to research the allelopathic effect of Mirabilis jalapa L. on Oenothera biennis L.. Oenothera biennis L. seeds were placed in petri dishes in the laboratory conditions and soaked with water extract from Mirabilis jalapa L. fruit. The concentrations of water extract from Mirabilis jalapa L. fruit were 0.025 g/mL, 0.05 g/mL, 0.1 g/mL respectively. The effects of water extract from Mirabilis jalapa L. fruit were analyzed by the determinations of germination potential, germination rates, activity index, germination index and growth of seedling. The results showed that germination potential, germination rates, activity index and germination index all reached the highest compared to the other groups when the concentration of water extract from Mirabilis jalapa L. fruit was 0.025 g/mL. The fresh weight and seedling length were improved compared to the control group when the concentration of water extract from Mirabilis jalapa L. fruit were 0.05 g/mL, 0.025 g/mL, but its root growth was inhibited. The water extract from Mirabilis jalapa L. fruit could promote seed germination and raise fresh weight, seedling length of Oenothera biennis L, but its root growth was inhibited.