Effect of Chromium (VI) on physical growth and biochemical parameters of Wheat (Triticum aestivum L.) seedlings
نویسندگان
چکیده
The effect of different concentrations of hexavalent Cr on growth and biochemical parameters of two T. aestivum cultivars (Punjab-11 and Sehar-06) was investigated. No significant inhibition of seed germination was observed in both the cultivars at all the tested concentrations (P ˃ 0.05). A significant decrease in root length for both the cultivars was observed at all the Cr concentrations as compared with the control (P < 0.05). In case of shoot length the metal caused a significant decrease in shoot length in Saher-06 (P < 0.05) while in cv. Punjab-11 the shoot length was not significantly affected (P ˃ 0.05) by metal. A strong phytotoxic effect of Cr on root growth was determined for both the cultivars with high phytotoxic effect in Saher-06. The phytotoxic effect of the metal on shoot growth was much higher in wheat variety Saher-06 than in the Punjab-11 at all the tested concentrations. Seedling vigor index of both the cultivars was found less than that of the control with Saher-06 showing a significant decrease in seedling vigor due to the presence of metal. Among the two cultivars Punjab-11 showed better tolerance towards metal stress as compared to Saher-06. Total soluble protein, catalase and peroxidase contents increased in cv. Punjab-11 and decreased in cv. Saher-06 under metal treatment. The study concluded that wheat variety Punjab-11 revealed more tolerance towards Cr stress as compared to Saher-06.
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