Germination of Bouteloua dactyloides and Cynodon dactylon in a Multi-Polluted Soil

Mining wastes generate high environmental impacts, and population exposure to metals and metalloids. Phytoremediation is a technology that uses plants to remediate polluted sites, but one of its limitations is seed germination in soil with a high content of metals and metalloids. Bouteloua dactyloid...

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Veröffentlicht in:Sustainability 2017-01, Vol.9 (1), p.81-81
Hauptverfasser: Delgado-Caballero, María, Alarcón-Herrera, María, Valles-Aragón, María, Melgoza-Castillo, Alicia, Ojeda-Barrios, Dámaris, Leyva-Chávez, Arwell
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container_end_page 81
container_issue 1
container_start_page 81
container_title Sustainability
container_volume 9
creator Delgado-Caballero, María
Alarcón-Herrera, María
Valles-Aragón, María
Melgoza-Castillo, Alicia
Ojeda-Barrios, Dámaris
Leyva-Chávez, Arwell
description Mining wastes generate high environmental impacts, and population exposure to metals and metalloids. Phytoremediation is a technology that uses plants to remediate polluted sites, but one of its limitations is seed germination in soil with a high content of metals and metalloids. Bouteloua dactyloides (former Buchloe dactyloides) is a native species from semiarid regions, while Cynodon dactylon is an invasive species; both are tolerant to harsh soil conditions. The objective of this research was to evaluate the germination of both species, exposed to a multi-polluted soil with As, Cd, Pb, and Zn of a mining site, considering different pH conditions (from 5.0 to 9.0). The study considered four repetitions by type of seed and soil pH. The highest germination of B. dactyloides was 83% at pH 7.8, while the greatest germination of C. dactylon was 34% at pH 6.0. These percentages are similar to those obtained in a standard germination test, which are 82.5% for B. dactyloides and 35% for C. dactylon. Germination was not reached in either species with soil at pH 5, owing to the fact that metals are more bioavailable in acid environments. B. dactyloides and C. dactylon had a high potential to germinate in multi-polluted soil at neutral pH, but further experiments are needed.
doi_str_mv 10.3390/su9010081
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Phytoremediation is a technology that uses plants to remediate polluted sites, but one of its limitations is seed germination in soil with a high content of metals and metalloids. Bouteloua dactyloides (former Buchloe dactyloides) is a native species from semiarid regions, while Cynodon dactylon is an invasive species; both are tolerant to harsh soil conditions. The objective of this research was to evaluate the germination of both species, exposed to a multi-polluted soil with As, Cd, Pb, and Zn of a mining site, considering different pH conditions (from 5.0 to 9.0). The study considered four repetitions by type of seed and soil pH. The highest germination of B. dactyloides was 83% at pH 7.8, while the greatest germination of C. dactylon was 34% at pH 6.0. These percentages are similar to those obtained in a standard germination test, which are 82.5% for B. dactyloides and 35% for C. dactylon. Germination was not reached in either species with soil at pH 5, owing to the fact that metals are more bioavailable in acid environments. 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source MDPI - Multidisciplinary Digital Publishing Institute; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals
subjects Bioavailability
Cadmium
Germination
Metalloids
Metals
Mine wastes
Phytoremediation
Pollutants
Salinity
Seeds
Soil conditions
Soil contamination
Soil pH
Soil pollution
Sustainability
title Germination of Bouteloua dactyloides and Cynodon dactylon in a Multi-Polluted Soil
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