interaction of sodium nitroprusside and copper on some growth and physiologic parameters of garden cress (lepidium sativum l.)

copper is a micronutrient which its, deficiency can alter essential functions in plant metabolism. on the other hand, excess copper is present in certain regions and environments, and can be potentially toxic to plants causing phytotoxicity by the formation of reactive oxygen species that damage cells. in this study, we examined the effect interactions between various concentrations of sodium nitroprusside (snp) solution (0, 50, 100, and 200 âµm) and different levels of cu (50, 100, and 200 âµm cuso4) on the growth and morphology of garden cress (lepidium sativuml.). the results showed that snp treatment increased roots and shoots fresh weight, as well as the contents of chlorophyll a, b, total chlorophyll and carotenoids in all of the l. sativum plants under cu toxicity, as compared with the control plants. snp treatment decreased malondialdehyde and other aldehyde in shoots and roots of the plants treated with copper, as compared with the control plants. in this study, determined that medium concentrations of snp solution (50 and 100 âµm) had good effects on improvement of physiological effects in plants under cu toxicity.