Effects of selenium hyperaccumulation on plant–plant interactions: evidence for elemental allelopathy?
Abstract
• Few studies have investigated plant-plant interactions involving hyperaccumulator plants. Here, we investigated the effect of selenium (Se) hyperaccumulation on neighboring plants. • Soil and litter Se concentrations were determined around the hyperaccumulators Astragalus bisulcatus and Stanleya pinnata and around the nonhyperaccumulators Medicago sativa and Helianthus pumilus. We also compared surrounding vegetative cover, species composition and Se concentration in two plant species (Artemisia ludoviciana and Symphyotrichum ericoides) growing either close to or far from Se hyperaccumulators. Then, Arabidopsis thaliana germination and growth were compared on soils collected next to the hyperaccumulators and the nonhyperaccumulators. • Soil collected around hyperaccumulators contained more Se (up to 266 mg Se kg(-1) ) than soil collected around nonhyperaccumulators. Vegetative ground cover was 10% lower around Se hyperaccumulators compared with nonhyperaccumulators. The Se concentration was higher in neighboring species A. ludoviciana and S. ericoides when growing close to, compared with far from, Se hyperaccumulators. A. thaliana showed reduced germination and growth, and higher Se accumulation, when grown on soil collected around Se hyperaccumulators compared with soil collected around nonaccumulators. • In conclusion, Se hyperaccumulators may increase the surrounding soil Se concentration (phytoenrichment). The enhanced soil Se contents around hyperaccumulators can impair the growth of Se-sensitive plant species, pointing to a possible role of Se hyperaccumulation in elemental allelopathy.
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There is ample evidence that Se protects plants from herbivory.
“There is ample evidence to indicate that Se protects plants from herbivory [208,209,210,211,212,213,214,215,216]”
From Selenium Cycling Across Soil-Plant-Atmosphere Interfaces: A Critical Review (2015) · cites this paper as [216]
The organic Se-enriched soil and litter around hyperaccumulators, as well as the Se-rich organs of the living plant itself, may be utilized by a variety of Se-tolerant organisms, thereby facilitating Se transport into the food chain with subsequent cycling in the local ecosystem.
“The organic Se-enriched soil and litter around hyperaccumulators, as well as the Se-rich organs of the living plant itself may be utilized by a variety of Se-tolerant organisms, thereby facilitating Se transport into the food chain with subsequent cycling in the local ecosystem [57,216].”
From Selenium Cycling Across Soil-Plant-Atmosphere Interfaces: A Critical Review (2015) · cites this paper as [216]
Over time, deposition of Se-rich litter may enrich the soil around hyperaccumulators with Se, creating Se hot spots.
“Over time, deposition of Se-rich litter may enrich the soil around hyperaccumulators with Se, creating Se hot spots [216].”
From Selenium Cycling Across Soil-Plant-Atmosphere Interfaces: A Critical Review (2015) · cites this paper as [216]
The protective effects of Se have been found not only for hyperaccumulators but also for other plants at lower Se concentrations.
“The protective effects of Se have been found not only for hyperaccumulators but also for other plants at lower Se concentrations [208,216].”
From Selenium Cycling Across Soil-Plant-Atmosphere Interfaces: A Critical Review (2015) · cites this paper as [216]
Cites
Selenium in higher plants: Understanding mechanisms for biofortification and phytoremediation
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Self-citationGaleas, M. L., Zhang, L. H., Freeman, J. L., Wegner, M., & Pilon‐Smits, E. A. H. (2007) · New Phytologist · doi:10.1111/j.1469-8137.2006.01943.x · Cited by 217 · see citing works
Self-citationNeuhierl, B., & Böck, A. (1996) · European Journal of Biochemistry · doi:10.1111/j.1432-1033.1996.0235u.x · Cited by 186 · see citing works
Freeman, J. L., Quinn, C. F., Lindblom, S. D., Klamper, E. M., & Pilon‐Smits, E. A. H. (2009) · American Journal of Botany · doi:10.3732/ajb.0800287 · Cited by 64 · see citing works
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Selenium Cycling Across Soil-Plant-Atmosphere Interfaces: A Critical Review
Winkel, L., Vriens, B., Jones, G., Schneider, L., Pilon-Smits, E., & Bañuelos, G. (2015) · Nutrients · doi:10.3390/nu7064199 · Cited by 476 · see citing works
“The organic Se-enriched soil and litter around hyperaccumulators, as well as the Se-rich organs of the living plant itself may be utilized by a variety of Se-tolerant organisms, thereby facilitating Se transport into the food chain with subsequent cycling in the local ecosystem [57,216].”
BackgroundSelf-citationEvolutionary aspects of elemental hyperaccumulation
Cappa, J. J., & Pilon-Smits, E. A. H. (2014) · Planta · doi:10.1007/s00425-013-1983-0 · Cited by 191 · see citing works
Self-citationEvolution of the metal hyperaccumulation and hypertolerance traits
Manara, A., Fasani, E., Furini, A., & DalCorso, G. (2020) · Plant, Cell & Environment · doi:10.1111/pce.13821 · Cited by 124 · see citing works
Effects of selenium hyperaccumulators on soil selenium distribution and vegetation properties
Reynolds, R. J. B., Jones, R. R., Heiner, J., Crane, K. M., & Pilon‐Smits, E. A. H. (2020) · American Journal of Botany · doi:10.1002/ajb2.1500 · Cited by 10 · see citing works
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- Authors
- El Mehdawi, A. F., Quinn, C. F., & Pilon‐Smits, E. A. H.
- Affiliations
- Colorado State University (US)
- Corresponding author
- Pilon‐Smits, Elizabeth A. H.
- Venue
- New Phytologist
- Publisher
- Wiley
- Published
- 2011-03-04
- Volume
- 191
- Issue
- 1
- Pages
- 120-131
- ISSN
- 0028-646X (ISSN-L)
- 1469-8137
- OpenAlex
- W2167461991
- Cited by
- 99
- References
- 6
- Citations by year
- 2026: 4 · 2025: 3 · 2024: 3 · 2023: 10 · 2022: 10 · 2021: 3 · 2020: 6 · 2019: 8 · 2018: 6 · 2017: 10 · 2016: 6 · 2015: 10 · 2014: 9 · 2013: 3 · 2012: 5
- FWCI
- 7.70
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- New Phytologist (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Science Foundation
- Topics
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Allelopathy and phytotoxic interactions
- Health Sciences › Nursing › Nutrition and Dietetics › Selenium in Biological Systems
- Physical Sciences › Environmental Science › Nature and Landscape Conservation › Ecology and Vegetation Dynamics Studies
- Keywords
- selenium hyperaccumulation, plant-plant interactions, Astragalus bisulcatus, Stanleya pinnata, alfalfa, Artemisia ludoviciana, Symphyotrichum ericoides, plant growth inhibition, vegetation cover
- MeSH terms
- Medicago sativa, Helianthus, Population Dynamics, Seeds, Selenium, Soil, Arabidopsis, Plant Leaves, Germination, Brassicaceae, Astragalus Plant, Biodiversity
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