Antioxidant enzymes as bio-markers for copper tolerance in safflower (Carthamus tinctorius L.)

  • Ali Ahmed
  • Ammarah Hasnain
  • Saeed Akhtar
  • Asma Hussain
  • Abaid ullah
  • Ghulam Yasin
  • Abdul Wahid
  • Seema Mahmood

Abstract

Activities of antioxidants enzymes were investigated in order to evaluate protective mechanism of plants against oxidative stress induced by high concentration of copper. Safflower (Carthamus tinctorius L.) plants were exposed to 100 μM copper (Cu) for two weeks under controlled environmental conditions using hydroponic culture. Cu induced changes in chlorophyll and carotenoids pigments. More Cu accumulated in the roots as compared with the leaves. Level of lipid peroxidation and antioxidative enzyme activities (peroxidase, catalase and superoxide dismutase) also correlated with the Cu content of the plant tissues. However, restricted transfer of the metal to the foliage and enhanced activity of peroxidase, catalase and superoxide dismutase may be of great significance for scavenging oxidative stress caused by excessive copper in safflower plants. Thus, these antioxidant enzymes served as good predictors for the evaluation of heavy metal tolerance.

Keywords: Carthamus tinctorius, copper stress, oxidative damage, antioxidant defense

African Journal of Biotechnology Vol. 9(33), pp. 5441-5444, 16 August, 2010

Author Biographies

Ali Ahmed
Institute of Pure and Applied Biology, Bahauddin Zakariya University, Multan, 60800, Pakistan
Ammarah Hasnain
Institute of Pure and Applied Biology, Bahauddin Zakariya University, Multan, 60800, Pakistan
Saeed Akhtar
Department of Food Science and Technology, University College of Agriculture, Bahauddin Zakariya University, Multan, Pakistan
Asma Hussain
Institute of Pure and Applied Biology, Bahauddin Zakariya University, Multan, 60800, Pakistan
Abaid ullah
Department of Biosciences, Comsat Institute of Technology, Islamabad, Pakistan
Ghulam Yasin
Institute of Pure and Applied Biology, Bahauddin Zakariya University, Multan, 60800, Pakistan
Abdul Wahid
Institute of Pure and Applied Biology, Bahauddin Zakariya University, Multan, 60800, Pakistan
Seema Mahmood
Institute of Pure and Applied Biology, Bahauddin Zakariya University, Multan, 60800, Pakistan; Visiting Professor, Division of Environment and Evolutionary Biology, University of Glasgow, Scotland, U.K G12 8QQ
Published
2013-08-09
Section
Articles

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eISSN: 1684-5315