Effects of allelopathic compounds of barley (Hordeum vulgare L.) on seedling growth and some antioxidant activities of Chenopodium album

This study was conducted to study the allelopathic potential of barley (Hordeum vulgare) compounds on Chenopodium album germination and enzyme changes. Allelopathic extracts were one phenolic and three alkaloids compounds (strychnine, atropine, and quinine). The experiment was arranged in a randomized complete blocks design with three replications. Results indicated that the alkaloids atropine and strychnine had the highest negative impact on germination percentage, germination rate, seeding fresh weight, activities of catalase, peroxidase, and alpha-amylase enzymes. Also, these treatments caused to increase cell membrane‟s damage and malondialdehyde (MDA) concentration in the tissue of the treated plant. The highest concentration of MDA of Chenopodium album belonged to strychnine treatment with 0.076 nmol/g weight of seedling. The highest activity of catalase, peroxidase (6.3 and 17.1 mg observed in 60 seconds, respectively) and alpha-amylase (9 nmol of seeds per minute) was observed in quinine text to control treatment, suggesting the low impact of this alkaloid in the treated plant, compared to the others. Generally, allelopathic extracts of barley including phenolic, strychnine and atropine compounds had higher negative effects on seed germination and enzymes activities of Chenopodium album seedling.

کلیدواژه ها:

Allelopathy ، Alkaloids ، Phenol ، Alphaamylase ، Malondialdehyde