Algae and Cyanobacteria in the rhizosphere of lead accumulator plants

Authors

  • Alejandra G. Becerra Laboratorio de Micología, Instituto Multidisciplinario de Biología Vegetal (IMBIV) - CONICET- Universidad Nacional de Córdoba (UNC)
  • Claudia Daga Departamento de Diversidad Biológica y Ecología, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Argentina
  • Raquel Murialdo Departamento de Hidráulica, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Argentina
  • Valeria Faggioli Instituto Nacional de Tecnología Agropecuaria, EEAMarcos Juárez, Ruta 12 km 36, 2580 Marcos Juárez, Argentina.
  • Eugenia Menoyo Grupo de Estudios Ambientales (GEA), Instituto de Matemática Aplicada San Luis (IMASL)–CONICET, Universidad Nacional de San Luis, Ejército de los Andes 950, 5700 San Luis, Argentina
  • M. Julieta Salazar Instituto Multidisciplinario de Biología Vegetal (IMBIV)-CONICET, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Av. Vélez Sársfield, 1611. Córdoba, Argentina

DOI:

https://doi.org/10.31055/1851.2372.v56.n1.29317

Keywords:

Cyanobacteria, Heavy metals, Lead, Plants, Rhizosphere, Trebouxia, Vaucheria

Abstract

Background and aims: Algae and Cyanobacteria species that grow in contaminated sites can accumulate high concentrations of heavy metals. In this work it was proposed to a) characterize the community of algae and Cyanobacteria and b) evaluate the effect of lead (Pb) on the composition of algae present in the rhizosphere of plants capable to accumulate Pb in Córdoba province.

M&M: Soil samples were taken from the rhizosphere of Sorghum halepense, Bidens pilosa and Tagetes minuta at sites with different levels of Pb. In the laboratory, the soil was sown in capsules with sterilized Watanabe medium. The cultures grew 9 weeks. The algae and Cyanobacteria were identified over the time and the final relative frequency analyzed.

Results: In contaminated soils, 24 species of Cyanobacteria, Chloroplastida and Xanthophyceae were identified. The heterocytous cyanobacteria Cylindrospermum muscicola, Nostoc commune and Calothrix clavata registered a relative mean frequency (between 21 and 60%). Trebouxia parmeliae (Chloroplastida) and Vaucheria sp. (Xanthophyceae) were present in soils with the highest level of Pb. Most of the species were concentrated in the lowest levels of Pb.

Conclusions: A negative effect of Pb on the species richness of algae and Cyanobacteria was observed in the rhizosphere of the evaluated plants. Based on the composition of the community of algae and Cyanobacteria in the soil, two groups are determined and could be considered tolerant and non-tolerant communities of Pb contamination. 

Author Biography

  • Alejandra G. Becerra, Laboratorio de Micología, Instituto Multidisciplinario de Biología Vegetal (IMBIV) - CONICET- Universidad Nacional de Córdoba (UNC)

    Laboratorio de Micología, Departamento de Diversidad Biológica y Ecología Prof. Asociada de la Cátedra de Diversidad Biológica I, Investigadora Independiente del Conicet, Insituto Multidisciplinario de Biología Vegetal.

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Published

2021-02-18

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Section

Phychology

How to Cite

“Algae and Cyanobacteria in the Rhizosphere of Lead Accumulator Plants”. 2021. Boletín De La Sociedad Argentina De Botánica (Journal of the Argentine Botanical Society 56 (1). https://doi.org/10.31055/1851.2372.v56.n1.29317.

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