Effect of rhizosphere and plant-related factors on the cadmium uptake by maize (Zea mays L.)
| Autor: | Thibault Sterckeman, Jérôme Perriguey, Jean-Louis Morel |
|---|---|
| Přispěvatelé: | Laboratoire Sols et Environnement (LSE), Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL) |
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
0106 biological sciences
Absorption (pharmacology) cadmium chemistry.chemical_element translocation Plant Science phytotoxicity Biology 01 natural sciences zea mays plante de grande culture tige Poaceae stem métal lourd Ecology Evolution Behavior and Systematics 2. Zero hunger Cadmium Rhizosphere ION COMPETITION indian corn Symplast food and beverages ROOT ABSORPTION 04 agricultural and veterinary sciences [SDV.BV.BOT]Life Sciences [q-bio]/Vegetal Biology/Botanics Micronutrient root ABSORPTION ISOTHERM racine Horticulture chemistry Agronomy Shoot 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Phytotoxicity phytotoxicité Agronomy and Crop Science absorption 010606 plant biology & botany |
| Zdroj: | Environmental and Experimental Botany Environmental and Experimental Botany, Elsevier, 2008, 63 (1-3), pp.333-341. ⟨10.1016/j.envexpbot.2007.12.014⟩ |
| ISSN: | 0098-8472 |
| DOI: | 10.1016/j.envexpbot.2007.12.014⟩ |
| Popis: | The characteristics of 12- and 24-day-old maize plants (Zea mays L. cv MB862) related to Cd absorption were investigated with respect to the influence of Cd concentration in the plant organs, to plant age, absorption time and competition with micronutrients. Despite high Cd concentrations in the nutrient solution, hydroponically cultivated maize did not seem to be affected by Cd toxicity, except for the highest Cd level (100 μmol L−1). There was on average five times more Cd in roots than in shoots and the Cd root to shoot ratio increased with increasing Cd concentration in the nutrient solution. No significant differences were observed between influx measured for 2 h in the middle of the day light period and for a full day period. Plants with different internal Cd concentrations showed similar root absorption characteristics of this metal. The root Cd influxes were three times higher in solutions with low micronutrient contents than in the solutions with higher micronutrient contents, and almost three times higher in 12-day-old roots than in 24-day-old roots. The root Cd influx was linearly related to its concentration in the solution, showing no saturable component. Our results suggest a non-specific and unregulated transport of Cd into the maize root symplast. They also indicate a regulation of the Cd translocation from root to shoot, as well as dependence of parameters of Cd root absorption on plant and rhizosphere conditions which should be taken into account for Cd uptake modelling. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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