Potential Allelopathic Interference of Abutilon theophrasti Medik. Powder/Extract on Seed Germination, Seedling Growth and Root System Activity of Maize, Wheat and Soybean

The velvetleaf (Abutilon theophrasti Medik.) is a strong and competitive weed in fields that inhibits the growth of crops. Reports have suggested allelopathy one reasons for this inhibition; however, mechanism remains unclear. In study, powder/extracts were shown to inhibit seed germination, yield maize, wheat soybean through petri dish, pot field control experiments. We observed concentration-dependent inhibition germination rate all three root tip structure changed significantly embryo even died when irrigated with high concentration extract (10 mg·mL?1). After adding powder, malondialdehyde (MDA) content crop seedlings was dose-dependent, superoxide dismutase (SOD) activity showed maximum values under treatment 1.25, 5 mg·cm?3, respectively. peroxidase (POD) highest value mg·cm?3 maize 10 seedlings. However, sugar, protein crops lowest treatment. Therefore, may decrease productivity by changing antioxidant enzyme activities, system activities structures.