Vermiculite, a Source of Metals for Arabidopsis thaliana1
| Autor: | David T. Tingey, Susan Raba, Kent D. Rodecap, Jerome J. Wagner |
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| Rok vydání: | 1982 |
| Předmět: | |
| Zdroj: | Journal of the American Society for Horticultural Science. 107:465-468 |
| ISSN: | 2327-9788 0003-1062 |
| DOI: | 10.21273/jashs.107.3.465 |
| Popis: | Plants of Arabidopsis thaliana (L.) Heynh. were grown in hydroponic systems using vermiculite as a growth medium at nutrition levels ranging from adequate to deficient. Plants grown on the low-total nutrient or low-iron nutrient contained more of iron, magnesium, and aluminum, frequently twice as much as plants grown at normal nutrient levels. Plants grown in iron-deficient nutrient were initially chlorotic; after about 5 weeks the chlorosis disappeared and these plants contained higher tissue iron levels than those receiving iron in the solutions. Concentrations of aluminum in the foliage ranged between 2 and 5 mg/g dry weight. Chemical analysis of the nutrient solution indicated that there was not sufficient aluminum, as a contaminant, in the nutrient solution to account for the concentrations that occurred in the plant tissue. Apparently, plants experiencing nutrient stress may modify the root environment so that vermiculite is solubilized and iron, magnesium, and aluminum are taken up by the plant. Levels of aluminum that accumulate in Arabidopsis foliage suggest that it should be classified as an aluminum-accumulating plant. |
| Databáze: | OpenAIRE |
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