Evaluation the impact of selenium-enrichment and some organic matter on morphophysiological and essential oil in Anethum graveolens L

Recently, the role of selenium (Se) as an antioxidant has generated wide interest in humans and animal-based on its presence in antioxidant defense systems. Unfortunately, people in many countries fail to get enough selenium. Dill (Anethum graveolens L.) is one of the medicinal plants belonging to the family Apiaceae. Any kind of herbal drug is influenced by many factors. Genetic, pre-harvest (season of harvest, soil, type of water), and post-harvest factors (storage, temperature, moisture) can affect total phenolic, flavonoid, and antioxidant capacity as well as other elements and compounds. The aim of this study was to investigate the effect of selenium trace in combination with and acids on the enrichment of dill. The experiment was conducted in a completely randomized design with three levels of acid (0, 50, and 150 mmol/L) and selenium application at 5 levels (0, 6, 8, 12 and 16 mg/L). The results of this experiment showed that the effect of selenium at different level of acids was significant. So that shoot fresh and dry weight, chlorophyll, essential oils, selenium content, and antioxidant enzymes were affected by increasing treatment level. The results indicated that (50 mg/L acid+12 mg/L sodium selenate) increased and improved some morphophysiological traits and essential oils including ɑ-Pinene, β-Myrecene, ɑ-Phellandene, and Carvone.