Evaluation of biochemical parameters of Portulaca oleracea under chromium and salinity

The aim of this study was to investigate the interaction of salinity and chromium stress on some biochemical characteristics of portulaca oleracea. This study was conducted in a completely randomized greenhouse design with 3 replications. 4 salinity levels (0, 4, 8 and 12 ds/m) were provided using sodium chloride every 4 days through irrigation and chromium treatment levels (0, 7, 14, 21 and 28 mg/kg dry weight of soil) and before from seed cultivation in soil, different levels of chromium treatment were obtained by increasing potassium dichromate to soil. The levels of Soluble and insoluble carbohydrates in alcohol, proteins, proline, malondialdehyde and hydrogen peroxide were measured after 60 days of plant cultivation. The results showed that with increasing levels of chromium and salinity, the amounts of proline, peroxide, malondialdehyde, soluble carbohydrates increased, but insoluble carbohydrates and proteins decreased. The lowest amount of insoluble carbohydrates and proteins and the highest amount of proline, peroxide, malondaldehyde and alcohol-soluble carbohydrates were observed in the combined stress of salinity levels of 12 ds/m and chromium 28 mg/kg. The combined stress of salinity and chromium caused a further reduction in insoluble carbohydrates and portulaca protein.