Abstract
Chara fragilis and Chara vulgaris were cultivated in a natural medium containing rubidium and caesium as chloride.
The growth of Characeae was increased after culture in the solutions containing Rb and Cs in small amount. The resistance to the toxic effects of these two ions is enhanced if potassium chloride is added to the medium.
Quantitative analyses indicate that Rb and Cs decrease the rate of Na and K but have no significative influence on the rate of Ca.
Résumé
Le rubidium et le césium introduits à l'état de chlorure dans le milieu de culture ont à faible dose un effet stimulant sur la croissance de Chara fragilis et de Chara vulgaris. La résistance de ces végétaux à l'action toxique des deux ions est accrue par l'addition de potassium au milieu.
Les analyses chimiques confirment que le rubidium et le césium sont antagonistes vis-à-vis du potassium et du sodium alors qu'ils ne modifient pas de manière significative le taux de calcium.
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Université de Dijon, Laboratoire de Nutrition minérale des Végétaux
Université de Dijon, Laboratoire de Nutrition minérale des Végétaux
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Strauss, R. Effets du rubidium et du césium sur la croissance et la nutrition minerale des characees. Hydrobiologia 71, 87–93 (1980). https://doi.org/10.1007/BF00005831
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DOI: https://doi.org/10.1007/BF00005831