Physiological Responses to Cadmium, Nickel and their Interaction in the Seedlings of Two Maize (Zea mays L.) Cultivars
| Autor: | Milada Čiamporová, Tatiana Artiushenko, Ján Pavlovkin, Vladimír Repka, Dmitry Syshchykov, Roderik Fiala |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
maize leaves Ecology (disciplines) Soil Science chemistry.chemical_element Plant Science Horticulture 010603 evolutionary biology 01 natural sciences photoelectric response Plant science Botany Cultivar plasma membrane integrity Cadmium food and beverages Agriculture Zea mays Physiological responses Nickel heavy metals (cd ni) antioxidants Agronomy chemistry Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Agriculture, Vol 62, Iss 4, Pp 127-137 (2016) |
| ISSN: | 1338-4376 |
| DOI: | 10.1515/agri-2016-0013 |
| Popis: | In the leaves of maize seedlings, cultivars Premia and Blitz, the relatively low 2 μmol/L concentration of cadmium (Cd), nickel (Ni), or both metals acting simultaneously (Cd +Ni) for 72 h, induced a significant metal accumulation, decrease in total K+ content, reduction of light-induced membrane electrical potential (EM) repolarisation in mesophyll cells and changes of ascorbic acid (AsA), dehydroascorbic acid (DHA) and glutathione (GSH) content. Shoot growth and the values of resting EM did not change significantly. Increased K+ leakage, from the leaves, and lipid peroxidation accompanied by increase of TBA-reactive substances (TBARS) were found only in cv. Blitz exposed to Cd + Ni. This indicates a capability of high leaf-cell anti-oxidant pool to ameliorate the toxic effects on plasma membrane of single ions in both cultivars, and of Cd + Ni only in cv. Premia. The decreased total content of K+ in leaves in all variants indicated repressing the K+ uptake and/or distribution to the shoots. Under anoxia, the magnitude of the repolarisation obtained after switching on the light was smaller in Cd-treated cultivar Premia than in the controls, and this also occurred in Ni- and Cd + Ni-treated cultivar Blitz. |
| Databáze: | OpenAIRE |
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