Genetic Variation in Cadmium Accumulation and Tolerance among Wheat Cultivars at the Seedling Stage |
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| Authors: | Asif Naeem Saifullah Muhammad Zia-ur Rehman Tasneem Akhtar Yong Sik Ok Zed Rengel |
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| Institution: | 1. Institute of Soil and Environment, University of Agriculture, Faisalabad, Pakistan;2. Soil Science Division, Nuclear Institute for Agriculture and Biology (NIAB), Faisalabad, Pakistan;3. Department of Environmental Health, College of Applied Medical Sciences, University of Dammam, Kingdom of Saudi Arabia;4. Department of Arid Land Agriculture, King Abdul Aziz University, Jeddah, Kingdom of Saudi Arabia;5. Department of Biological Environment, Kangwon National University, Chuncheon, Korea;6. School of Earth and Environment, University of Western Australia, Crawley, WA, Australia |
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| Abstract: | Exploitation of genetic differences to select wheat cultivars’ pollution-safe from cadmium (Cd) contamination requires better understanding of Cd uptake and translocation patterns. For this purpose, 15 wheat cultivars were grown in nutrient solution and exposed to four levels of Cd, i.e., 0, 15, 30, and 45 µM. The plants were harvested after 2 weeks of Cd exposure. Root and shoot relative dry matter (DM) was decreased in most of the cultivars, but some cultivars did not exhibit any toxic symptoms. The lowest Cd concentration in shoots was recorded for Lasani-2008 and Iqbal-2000 while the highest for Sehar-2006 and Inqlab-91. Both root absorption and translocation accounted for regulating Cd concentration in shoots. There was no relationship between relative DM and Cd concentrations in roots and shoots. The results suggest that wheat cultivars with low shoot Cd concentration but higher tolerance, i.e. Lasani-2008 and Iqbal-2000, could be used in breading programs for low Cd wheat. |
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| Keywords: | Cd translocation metal tolerance metal uptake phytoremediation phytostabilization pollution-safe cultivar |
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