Machaeranthera tanacetifolia
Tanseyleaf tansyaster
Synonym: Aster tanacetifolius
Accumulation profile
- Substrate
- Seleniferous
- Habitat
- Seleniferous soils, western United States
- Distribution
- USA (western Great Plains and Southwest)
- First reported
- 2014 · El Mehdawi et al.
- Verification
- primary-measured
Description & ecology
VALUE AS STATED AT SOURCE (El Mehdawi et al. 2014, Physiol. Plant. 152:70–83, doi:10.1111/ppl.12149, abstract): 'Symphyotrichum ericoides and M. tanacetifolia accumulated Se up to 3000 and 1500 mg Se kg-1 DW, respectively'; 55% of its Se as C-Se-C compounds, the remainder inorganic.
CAUTION / PROVISIONAL: measured as a comparison Asteraceae in a Se-supplied greenhouse experiment; value (1500 µg g⁻¹, >1000) exceeds the hyperaccumulation threshold, but field hyperaccumulation was NOT independently established here. Treat as a strong facultative/secondary accumulator rather than an obligate hyperaccumulator until a field foliar maximum is confirmed.
Se hyperaccumulation threshold 100 µg g⁻¹ (van der Ent 2013).
References
- El Mehdawi, A. F., Reynolds, R. J. B., Prins, C. N., Lindblom, S. D., Cappa, J. J., Fakra, S. C., & Pilon-Smits, E. A. H. (2014). Analysis of selenium accumulation, speciation and tolerance of potential selenium hyperaccumulator Symphyotrichum ericoides. Physiologia Plantarum, 152, 70–83. doi:10.1111/ppl.12149