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Article

Influence of Seed Source and Soil Contamination on Ecophysiological Responses of Lavandula pedunculata in Rehabilitation of Mining Areas

1
Department of Plant Biology and Soil Science, University of Vigo, As Lagoas, Marcosende, 36310 Vigo, Spain
2
Área de Edafoloxía e Química Agrícola, Facultade de Ciencias, Universidade de Vigo, As Lagoas, 32004 Ourense, Spain
3
Linking Landscape, Environment, Agriculture and Food Research Centre (LEAF), Associated Laboratory, Laboratory for Sustainable Land Use and Ecosystem Services (TERRA), Instituto Superior de Agronomia, Universidade de Lisboa, 1349-017 Lisboa, Portugal
*
Author to whom correspondence should be addressed.
Academic Editor: Pedro Diaz-Vivancos
Plants 2022, 11(1), 105; https://doi.org/10.3390/plants11010105
Received: 30 November 2021 / Revised: 22 December 2021 / Accepted: 23 December 2021 / Published: 30 December 2021
(This article belongs to the Special Issue Metal (Loid)s Tolerance in Plants)
Mining activities have turned many areas of the Iberian Pyrite Belt (IPB) into extreme environments with high concentrations of metal(loid)s. These harsh conditions can inhibit or reduce the colonization and/or development of most vegetation. However, some species or populations have developed ecophysiological responses to tolerate stress factors and contaminated soils. The main objectives of this study are: (i) to assess the differences in germination, growth, development and physiological behaviour against oxidative stress caused by metal(loid)s in Lavandula pedunculata (Mill.) Cav. from two different origins (a contaminated area in São Domingos mine, SE of Portugal and an uncontaminated area from Serra do Caldeirão, S of Portugal) under controlled conditions; and (ii) to assess whether it is possible to use this species for the rehabilitation of mine areas of the IPB. After germination, seedlings from São Domingos (LC) and Caldeirão (L) were planted in pots with a contaminated soil developed on gossan (CS) and in pots with an uncontaminated soil (US) under controlled conditions. Multielemental concentrations were determined in soils (total and available fractions) and plants (shoots and roots). Germination rate, shoot height, dry biomass and leaf area were determined, and pigments, glutathione, ascorbate and H2O2 contents were measured in plant shoots. Total concentrations of As, Cr, Cu, Pb and Sb in CS, and As in US exceed the intervention and maximum limits for ecosystem protection and human health. The main results showed that L. pedunculata, regardless of the seed origin, activated defence mechanisms against oxidative stress caused by high concentrations of metal(loid)s. Plants grown from seeds of both origins increased the production of AsA to preserve its reduction levels and kept the contents of GSH stable to maintain the cell’s redox state. Plants grown from seeds collected in non-contaminated areas showed a high capacity for adaptation to extreme conditions. This species showed a greater growth capacity when seeds from a contaminated area were sown in uncontaminated soils. Thus, L. pedunculata, mainly grown from seeds from contaminated areas, may be used in phytostabilization programmes in areas with soils with high contents of metal(loid)s. View Full-Text
Keywords: Iberian Pyrite Belt; contamination; potentially hazardous elements; environmental rehabilitation; oxidative stress; antioxidative activity Iberian Pyrite Belt; contamination; potentially hazardous elements; environmental rehabilitation; oxidative stress; antioxidative activity
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MDPI and ACS Style

Arenas-Lago, D.; Carvalho, L.C.; Santos, E.S.; Abreu, M.M. Influence of Seed Source and Soil Contamination on Ecophysiological Responses of Lavandula pedunculata in Rehabilitation of Mining Areas. Plants 2022, 11, 105. https://doi.org/10.3390/plants11010105

AMA Style

Arenas-Lago D, Carvalho LC, Santos ES, Abreu MM. Influence of Seed Source and Soil Contamination on Ecophysiological Responses of Lavandula pedunculata in Rehabilitation of Mining Areas. Plants. 2022; 11(1):105. https://doi.org/10.3390/plants11010105

Chicago/Turabian Style

Arenas-Lago, Daniel, Luisa C. Carvalho, Erika S. Santos, and Maria M. Abreu. 2022. "Influence of Seed Source and Soil Contamination on Ecophysiological Responses of Lavandula pedunculata in Rehabilitation of Mining Areas" Plants 11, no. 1: 105. https://doi.org/10.3390/plants11010105

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