Chemical and thermal profile of Plectranthus amboinicus essential oil for its application as a bioherbicide

Joseila Maldaner; Marilene Nunes Oliveira; Darlisson de Alexandria Santos; Paulo de Tarso Garcia; Simone Yasue Simote Silva; Sebastião da Cruz Silva; Layane Evellin Pinto Lima; Fernanda dos Santos Silva

doi:10.14808/sci.plena.2021.731102

Chemical and thermal profile of Plectranthus amboinicus essential oil for its application as a bioherbicide

Authors

Joseila Maldaner Secretaria da Agricultura Pecuária e Desenvolvimento Rural - RS - Departamento de Diagnóstico e Pesquisa Agropecuária https://orcid.org/0000-0002-3008-5047
Marilene Nunes Oliveira Faculdade de Química, Instituto de Ciências Exatas, Universidade Federal do Sul e Sudeste do Pará – UNIFESSPA https://orcid.org/0000-0002-5929-1274
Darlisson de Alexandria Santos Faculdade de Química, Instituto de Ciências Exatas, Universidade Federal do Sul e Sudeste do Pará – UNIFESSPA https://orcid.org/0000-0001-5817-5792
Paulo de Tarso Garcia Faculdade de Química, Instituto de Ciências Exatas, Universidade Federal do Sul e Sudeste do Pará – UNIFESSPA https://orcid.org/0000-0002-4680-1941
Simone Yasue Simote Silva Faculdade de Química, Instituto de Ciências Exatas, Universidade Federal do Sul e Sudeste do Pará – UNIFESSPA https://orcid.org/0000-0002-9421-5381
Sebastião da Cruz Silva Faculdade de Química, Instituto de Ciências Exatas, Universidade Federal do Sul e Sudeste do Pará – UNIFESSPA https://orcid.org/0000-0001-7436-0605
Layane Evellin Pinto Lima Faculdade de Química, Instituto de Ciências Exatas, Universidade Federal do Sul e Sudeste do Pará – UNIFESSPA https://orcid.org/0000-0001-9224-7550
Fernanda dos Santos Silva Faculdade de Química, Instituto de Ciências Exatas, Universidade Federal do Sul e Sudeste do Pará – UNIFESSPA https://orcid.org/0000-0001-9216-0105

DOI:

https://doi.org/10.14808/sci.plena.2021.731102

Keywords:

essential oil, bioherbicide, derivative thermogravimetric

Abstract

The species Plectranthus amboinicus is an aromatic herb with great application in popular medicine due to the diversity of biological properties. Chemically, its essential oil (EO) is characterized by two chemotypes, thymol and carvacrol, which vary depending on factors such as seasonality. Despite being an extensively exploited species, studies of the bioherbicidal potential of this species are insufficient. In this context, the EO of P. amboinicus leaves, extracted in two different seasonal periods, were characterized regarding chemical profile (by gas chromatography mass spectrometry - GC-MS) and thermal profile (DTG) and was subjected to bioherbicide tests (germination test and seedling development) against Eragrostis plana, commonly known as capim annoni, an invader of pastures in the Pampas region. P. amboinicus EO was a potent inhibitor of E. plana germination, reducing accumulated germination by over 70% when exposed to 0.1% EO, and a complete inhibition of germination was observed when exposed to 0.5%. Following the effects observed in germination, the initial growth of E. plana was significantly affected by concentrations above 0.05%. The major constituent identified via GC-MS was carvacrol, representing 87.5% of the volatile composition of P. amboinicus leaves. In addition, P. amboinicus EO presented high thermal stability up to 100 °C, which is an interesting result regarding its use as a bioproduct.

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Published

2021-12-11

How to Cite

Maldaner, J., Oliveira, M. N., Santos, D. de A., Garcia, P. de T., Silva, S. Y. S., Silva, S. da C., … Silva, F. dos S. (2021). Chemical and thermal profile of Plectranthus amboinicus essential oil for its application as a bioherbicide . Scientia Plena, 17(11). https://doi.org/10.14808/sci.plena.2021.731102

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Issue

Vol. 17 No. 11 (2021): Novembro/November 2021

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Articles

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Copyright (c) 2021 Joseila Maldaner, Marilene Nunes Oliveira, Darlisson de Alexandria Santos, Paulo de Tarso Garcia, Simone Yasue Simote Silva, Sebastião da Cruz Silva, Layane Evellin Pinto Lima, Fernanda dos Santos Silva

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