AI Article Synopsis
- Pteris cretica is a fern that can absorb high levels of arsenic (As) and the mechanisms of its uptake in hydroponic systems were studied.
- A modified hydroponic system was used to minimize plant differences and assess how As uptake and movement within the plant were influenced by initial As concentration.
- Both short-term and long-term experiments showed that rhizomes are crucial for regulating arsenic movement from roots to fronds, with the fern consistently removing about 1 mg/d of As from a hydroponic solution.
Article Abstract
Pteris cretica is a native fern in temperate regions known for its ability to hyperaccumulate arsenic (As). However, the uptake and translocation of As in hydroponic conditions have remained poorly understood. In this study, we modified a hydroponic cultivation system, combining 24 plants into one unit, to suppress individual differences among plants and evaluate As uptake and translocation in P. cretica. The 7-day short-term As removal experiment results revealed that the As uptake rate by P. cretica appears to be dependent on the initial As concentration in the hydroponic medium. Furthermore, the rhizomes play a role in regulating As translocation from roots to fronds in P. cretica was observed. In the 27-day long-term continuous flow experiment, approximately 1 mg/d of As was removed by P. cretica with 200 μg/L As applied. Moreover, the long-term translocation factor (TF) between rhizomes and roots and between fronds and rhizomes from the 27-day long-term continuous flow experiment demonstrated the same pattern as the short-term TF from the 7-day short-term As removal experiment, further indicating the role of rhizomes in regulating As translocation from roots to fronds in P. cretica.
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| http://dx.doi.org/10.1016/j.jhazmat.2023.132855 | DOI Listing |
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