Effects of tricin isolated from jungle rice (Echinochloa colona L.) on amylase activity and oxidative stress in wild oat (Avena fatua L.) (original) (raw)

Abstract

Bioactive compounds were isolated from the jungle rice (Echinochloa colona L.) and their phytotoxicity was evaluated against the weed wild oat (Avena fatua L.). Tricin (flavonoid compound) purified from E. colona was tested at 5, 25, 50 and 100 μM on wild oat growth. Tricin suppressed the germination and growth of target weed at higher concentrations (25, 50 and 100 μM). The inhibitory effects of tricin were due to the attenuation of amylase activity, which decreased the starch mobilization and also hampered the activities of antioxidant enzymes. The increase in the nonenzymatic antioxidant molecules (polyphenol, ascorbate and glutathione) was not sufficient to prevent the damage from tricin, because the level of H2O2 and lipid peroxidation was high. More studies are required to evaluate the use of tricin as bioherbicide to control the wild oat.

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