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- W2009003828 abstract "Carnivorous plants use animals as fertiliser substitutes which allow them to survive on nutrient deficient soils. Most research concentrated on the uptake of the prey's nitrogen and phosphorus; only little is known on the utilisation of other elements. We studied the uptake of three essential nutrients, potassium, iron and manganese, in three species of carnivorous pitcher plants (Cephalotus follicularis LaBilladiere, Sarracenia purpurea L., Heliamphora nutans Bentham). Using relatively short-lived and γ-emitting radiotracers, we significantly improved the sensitivity compared to conventional protocols and gained the following results. We demonstrated the uptake of trace elements like iron and manganese. In addition, we found direct evidence for the uptake of potassium into the pitcher tissue. Potassium and manganese were absorbed to virtually 100% if offered in physiological concentrations or below in Cephalotus. Analysis of pitcher fluid collected in the natural habitat showed that uptake was performed here as efficiently as in the laboratory. The absorption of nutrients is an active process depending on living glandular cells in the pitcher epidermis and can be inhibited by azide. Unphysiologically high amounts of nutrients were taken up for a short time, but after a few hours the absorbing cells were damaged, and uptake stopped. Absorption rates of pitcher leaves from plants under controlled conditions varied highly, indicating that each trap is functionally independent. The comparison of minerals in typical prey with the plants’ tissues showed that a complete coverage of the plants’ needs by prey capture is improbable." @default.
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- W2009003828 date "2009-12-01" @default.
- W2009003828 modified "2023-09-27" @default.
- W2009003828 title "Expanding the menu for carnivorous plants: Uptake of potassium, iron and manganese by carnivorous pitcher plants" @default.
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- W2009003828 doi "https://doi.org/10.1016/j.apradiso.2009.04.006" @default.
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