Aluminum in native plants from the Campo Rupestre: Investigating accumulation sites and detoxification mechanisms in Melastomataceae.

João Santana-Tomaz, Isaque Marcos Arcelino Resende, Hugo de Sousa Côrtes, Gilmar Edilberto Valente, Valdnéa Casagrande Dalvi, Brenda Vieira de Oliveira, Rosana Romero, Aristéa Alves Azevedo

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Article in Die Naturwissenschaften, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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8 authors.

João Santana-TomazLaboratory of Plant Anatomy and Morphogenesis, Department of Plant Biology, Federal University of Viçosa, Av. Peter Henry Rolfs s/n, 36570-900, Viçosa, Minas Gerais State, Brazil.ORCID http://orcid.org/0009-0001-4121-457X

Isaque Marcos Arcelino ResendeLaboratory of Plant Anatomy and Morphogenesis, Department of Plant Biology, Federal University of Viçosa, Av. Peter Henry Rolfs s/n, 36570-900, Viçosa, Minas Gerais State, Brazil.ORCID http://orcid.org/0009-0002-4971-1690

Hugo de Sousa CôrtesLaboratory of Plant Anatomy and Morphogenesis, Department of Plant Biology, Federal University of Viçosa, Av. Peter Henry Rolfs s/n, 36570-900, Viçosa, Minas Gerais State, Brazil.ORCID http://orcid.org/0009-0003-8607-769X

Gilmar Edilberto ValenteMicroscopy and Microanalysis Center, Federal University of Viçosa, Vila Gianetti, casa 22, 36570-075, Viçosa, Minas Gerais State, Brazil.ORCID http://orcid.org/0000-0002-0350-0452

Valdnéa Casagrande DalviLaboratory of Plant Anatomy, Federal Institute of Education Technology Goiano (IF Goiano, Campus Rio Verde), Rodovia Sul Goiana, Km 01, 75901‑970, Rio Verde, Goiás State, Brazil.ORCID http://orcid.org/0000-0002-9325-2025

Brenda Vieira de OliveiraDepartment of Statistics, Federal University of Viçosa, Av. Peter Henry Rolfs s/n, 36570- 900, Viçosa, Minas Gerais State, Brazil.ORCID http://orcid.org/0009-0006-7473-9985

Rosana RomeroInstitute of Biology, Federal University of Uberlândia, Av. Ceará s/n - Bloco 2D, 38400-902, Uberlândia, Minas Gerais State, Brazil.ORCID http://orcid.org/0000-0003-1090-7557

Aristéa Alves AzevedoLaboratory of Plant Anatomy and Morphogenesis, Department of Plant Biology, Federal University of Viçosa, Av. Peter Henry Rolfs s/n, 36570-900, Viçosa, Minas Gerais State, Brazil. aazevedo@ufv.br.ORCID http://orcid.org/0000-0002-8098-6767

Funding

Conselho Nacional de Desenvolvimento Científico e Tecnológico (Grant/Award Number: 100914/2024-1)Fundação de Amparo à Pesquisa do Estado de Minas Gerais APQ-02757-17Fundação de Amparo à Pesquisa do Estado de Minas Gerais Master's scholarship (5.12/2022)

6 · The paper itself

Abstract

The presence of aluminum (Al) in the soil as a factor promoting adaptations in the flora of Campos Rupestres (CR)/(Quartzite Rupestrian Grasslands) has been neglected. Our aim was to highlight the accumulation of Al in CR species and to understand the metal resistance strategies of twenty Melastomataceae species collected together with soil samples. The following analyses were carried out: Al and nutrient levels; tests for histolocalization of Al, phenolic compounds and mucilage; mapping of Al, Ca, Fe, Mn and Si in leaves and stems using SEM/EDS; and chemical analysis of the soils. All analyzed species are Al accumulators, with leaf Al concentrations ranging from 1.46 to 27.74 g kg⁻¹ of dry mass. The primary cell walls of different tissues are the main accumulation sites. The presence of Al in meristematic tissues, nuclei, and chloroplasts corroborates the metal's non-toxicity in CR plants. Compartmentalization of Al inside sclereids and mucilaginous idioblasts, complexation with silicon in cell walls and mineralized structures, and exudation of the metal together with secretion from glandular trichomes are possible mechanisms of Al internal detoxification. This study is the first to demonstrate Al accumulation by plants from Campo rupestre quartzitic, a megadiverse Brazilian OCBIL.

Indexed as

AluminumMelastomataceaeSoil PollutantsPlant LeavesSoilAluminumSoilSoil PollutantsAluminum hyperaccumulatorsChrome azurol SEspinhaço chainMyrtalesOCBILRocky outcrops

Identifiers

PMID41251856

DOI10.1007/s00114-025-02042-7

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