Cadmium tolerance in Thlaspi caerulescens: I. Growth parameters,metal accumulation and phytochelatin synthesis in response to cadmium |
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| Institution: | 1. Department of Plant Physiology, Maria Curie-Sk?odowska University, Akademicka 19, 20-033 Lublin, Poland;2. Department of Environmental Biology, Limburgs Universitair Centrum, Universitaire Campus, building D, B-3590 Diepenbeek, Belgium;1. College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China;2. Institute of Land Reclamation and Econlogy, China University of Mining and Technology Beijing, 100120, China;3. Beijing Huayu Engineering Company Limited, China Coal Technology and Engineering Group, Beijing 100120, China;1. Environmental Biology, Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium;2. Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Bonn, Germany;3. LEAF, Instituto Superior de Agronomia, Universidade de Lisboa, Lisbon, Portugal;1. School of Earth Sciences and Resources, China University of Geosciences, Beijing, 100083, PR China;2. School of Science, China University of Geosciences, Beijing, 100083, PR China;3. Key Laboratory of Ecological Geochemistry, Ministry of Natural Resources, Beijing, 100037, PR China;4. Nanjing University, Nanjing, 210023, PR China;5. Guangxi Bureau of Geology & Mineral Prospecting & Exploitation, Nanning, 530023, PR China;1. Universidade Federal de Santa Maria, Biology Department, 97105-900, Santa Maria, Rio Grande do Sul, Brazil;2. Arizona State University, 480-965-2100, Tempe, AZ, USA;3. Universidade Federal de Pelotas, Plant Physiology Department, 96010-900, Pelotas, Rio Grande do Sul, Brazil;4. Universidade Federal de Santa Maria, Chemistry Department, 97105-900, Santa Maria, Rio Grande do Sul, Brazil;1. Public Monitoring Center for Agro-Product, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China;2. Key Laboratory of Testing and Evaluation for Agro-product Safety and Quality, Ministry of Agriculture, Guangzhou, 510640, China;3. Laboratory of Quality and Safety Risk Assessment for Agro-product (Guangzhou), Ministry of Agriculture, Guangzhou, 510640, China;4. College of Resources and Environment/Research Center of Trace Elements (Guangzhou), Guangzhou, 510640, China;5. Huazhong Agricultural University, Wuhan, 430070, China |
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| Abstract: | A population of the metallophyte, Thlaspi caerulescens, originating from a Cd–Pb–Zn old mining and smelter site at Plombières (Belgium) was studied. T. caerulescens was cultivated hydroponically to investigate Cd uptake and tolerance. Cd was added to Hoagland’s medium at concentration range from 5 to 500 μM. The plants could tolerate 500 μM Cd in the solution showing only minor visible symptoms of toxicity but with a 32% decrease in fresh weight. After 14 days at 500 μM, Cd content in roots and shoots was 707 and 602 mg kg?1 of dry weight (d.w.), respectively. Application of Cd to hydroponically cultivated T. caerulescens induced the accumulation of PCs in plant roots and shoots. Buthionine sulfoximine (BSO) application almost completely reduced (by 98–100%) the accumulation of PCs without simultaneous increase in plants sensitivity to Cd. These results suggest a minor if any role of PCs in tolerance to Cd of the studied population of T. caerulescens in hydroponics. On the other hand, no PC accumulation was detected either in T. caerulescens plants growing in their natural environment at Plombierès or in plants growing in their native soil in a greenhouse. These results suggest that naturally selected tolerance in T. caerulescens population from Plombières is not associated with enhanced PCs synthesis. |
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