Effect of Chromium (VI) on physical growth and biochemical parameters of Wheat (Triticum aestivum L.) seedlings

نویسندگان

  • ZEB SADDIQE
  • AYESHA FAROOQ
  • FARAH KHAN
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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تاریخ انتشار 2015