Evaluation of oxidative stress by sunflower [Helianthus annuus (L.) cv. Azargol] extract on germination and seedling growth of Johnson grass (Sorghum halepense) and wild mustard (Sinapis arvensis).

摘要

This research was carried out in order to evaluate allelopathical effect of sunflower [Helianthus annuus (L.) cv. Azargol] on seed germination, seedling growth and lipid peroxidation of Johnson grass (Sorghum halepense) and wild mustard (Sinapis arvensis) seedling in two experiments, in Islamic Azad University, Shoushtar Branch, Iran. The experimental design was aranged in a completely randomized design (CRD) with three replications and treatments were 0, 5, 10 and 15% sunflower extracts. Results showed that seed germination, lipid peroxidation, seedling fresh weight and seedling length of weeds decreased when sunflower extract concentration increased but mean germination time decreased. Results indicated highest malondialdehyde concentration obtained of 15% sunflower extract in Johnson grass (0.061 micro mol/g f. w.) and wild mustard (0.073 micro mol/g f. w.). The results of this study revealed that sunflower extracts inhibited the wild mustard and Johnson grass seedling growth and increased lipid peroxidation.