The bark of Stryphnodendron rotundifolium as a source of phenolic extracts with antioxidant properties

The objective of this study was to evaluate the anatomical and chemical components of the bark of Stryphnodendron rotundifolium , a tree species from the Brazilian Cerrado, aiming to provide information that values its use as a source of polyphenols and natural antioxidants for various industry sect...

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Published in:Wood science and technology 2021-07, Vol.55 (4), p.1057-1074
Main Authors: Sousa, Thaís Brito, da Silva Mota, Graciene, da Silva Araujo, Elesandra, Carréra, Jéfyne Campos, Silva, Eliandra Pereira, Souza, Sebastião Gabriel, Lorenço, Mário Sérgio, Ferreira, Vanuzia Rodrigues Fernandes, Mori, Fábio Akira
Format: Article
Language:English
Subjects:
Antioxidants
Ashes
Bark
Biomedical and Life Sciences
Ceramics
Chemical composition
Composites
Cosmetics
Ethanol
Flavonoids
Foams
Free radicals
Glass
Hardwoods
Histochemistry
Life Sciences
Lignin
Machines
Manufacturing
Natural Materials
Original
Phenolic compounds
Phenols
Phloem
Plant extracts
Plant species
Polyphenols
Polysaccharides
Processes
Saccharides
Stryphnodendron rotundifolium
Wood Science & Technology
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Summary:The objective of this study was to evaluate the anatomical and chemical components of the bark of Stryphnodendron rotundifolium , a tree species from the Brazilian Cerrado, aiming to provide information that values its use as a source of polyphenols and natural antioxidants for various industry sectors. Anatomy and bark histochemistry were analyzed, as well as the summative chemical composition (extractive, lignin, suberin, ash and polysaccharide) and quantitative elemental analysis of bark. The bark extracts were quantified for phenolic composition and antioxidant activity. The results indicated that the bark is formed by conducting phloem, nonconducting phloem and rhytidome composed of two or more successive periderms. The average chemical composition of the bark was 50.2% total extractives, 28.2% total lignin, 1.3% suberin, 1.9 ash and 18.4% polysaccharides. The ethanol–water extract had a high content of flavonoids and condensed tannins, with 232.1 and 501.3 mg EC g −1 extract, respectively. The bark extract showed strong antioxidant activity, reaching 89.4% inhibition of DPPH free radicals, superior to the commercial antioxidant BHT, which inhibited 76.4% at the same concentration. These results show that S. rotundifolium bark is a potential natural source of phenolic compounds and antioxidants and can be used for medicinal purposes and to compose various products such as wood adhesives, cosmetics and foams. The extraction of these compounds will represent an important valorization of bark from this species and, therefore, contribute to economic and environmental valorization of the Cerrado.
ISSN:0043-7719
1432-5225
DOI:10.1007/s00226-021-01293-7