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Pteris melanocaulon Fée is an As hyperaccumulator
Rene Juna R Claveria1, Teresita R Perez2, Mary Jean B Apuan3
1Department of Environmental Science, Ateneo de Manila University, Quezon City, Philippines.
Pteris melanocaulon, a fern, excels at accumulating copper and arsenic in Philippine mines. This study confirms its potential as an excellent arsenic hyperaccumulator, similar to known species.
Area of Science:
- Environmental Science
- Biogeochemistry
- Phytoremediation
Background:
- Pteris melanocaulon thrives in copper-gold mine sites in the Philippines.
- Previous research identified it as a strong copper accumulator.
Purpose of the Study:
- To investigate the arsenic (As) hyperaccumulation potential of Pteris melanocaulon.
- To compare its arsenic bioaccumulation and translocation factors with known arsenic hyperaccumulators.
Main Methods:
- Field surveys and potted experiments were conducted.
- Soil and plant samples (belowground and aboveground) were analyzed for arsenic content.
- Bioaccumulation Factor (BF) and Translocation Factor (TF) were computed.
Main Results:
- Pteris melanocaulon demonstrated high arsenic accumulation in aboveground tissues.
- Computed BF and TF values for arsenic were comparable to known arsenic hyperaccumulators like Pteris vittata and Pityrogramma calomelanos.
- The fern also showed high copper accumulation in belowground components.
Conclusions:
- Pteris melanocaulon is identified as an excellent arsenic hyperaccumulator.
- Its arsenic uptake mechanisms and bioavailability factors are likely similar to other known arsenic hyperaccumulators.
- This fern has potential for phytoremediation of arsenic-contaminated mine sites.
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