Arsenic is considered as one of the most important environmental contaminant compound. Some plant species can grow in arsenic contaminated soil and they are able to reduce arsenic toxicity. In this study, hydroponic experiment was conducted of Isatis cappadocica, a newly-discovered As hyperaccumulator. Accordingly, we conducted this experiment to compare the interaction of arsenic and phosphorus on total chlorophyll and antioxidant compounds (carotenoids, anthocyanin & proline) of I. cappadocica for better understanding the mechanisms applied by this species. Therefore, the plants were grown for 6 weeks in a medium, embedded with combinations of 50, 200, 800 & 1200 μmol l−1 arsenic and 5, 50, 200, 800 & 1600 μmol l−1 phosphorus, respectively. The chlorophyll, antioxidant compounds and the arsenic concentration of harvestable parts were determined. The highest concentration of arsenic was obtained in plants treated with 1200 μmol l−1 As and 5 μmol l−1 phosphorus. Increasing arsenic concentration in the medium lead to increase of antioxidant compounds. The ability of Isatis to accumulate more than 700 mg kg-1 arsenic in the shoots, illustrates the high resistance of this herb to arsenic and the existence of efficient mechanisms including increase of antioxidant compounds.
کلید واژگان :Antioxidant compounds, Arsenic, Chlorophyll, Hyperaccumulator, I.cappadocica and Phosphorus
ارزش ریالی : 600000 ریال
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