Pre-emergent bioherbicide potential of Schinus terebinthifolia Raddi essential oil nanoemulsion for Urochloa brizantha

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Fernandes, Simone Y. ; de Araujo, Debora ; Pontes, Montcharles S. ; Santos, Jaqueline S. ; Cardoso, Claudia A. L. ; Simionatto, Euclesio ; Martines, Marco A. U. ; Antunes, Debora R. ; Grillo, Renato ; Arruda, Gilberto J. ; Santiago, Etenaldo F.

• Tipo de documento: Artigo Científico
• Fonte: BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY; v. 47, p. 13-pg., 2023-01-01.

Resumo

Essential oils are natural products capable of being used as novel agrochemical products. In order to fill knowledge gaps, this work evaluates the bioherbicidal potential of Schinus terebinthifolia fruit essential oil (EOsST) emulsions on germination parameters of Lactuca sativa and Urochloa brizantha seeds. The hydrodynamic size distribution of the emulsions was evaluated by dynamic light scattering (DLS), scanning electron microscopy (SEM), and Fourier-transform infrared spec-troscopy (FTIR). Also, the chemical composition of EOsST was performed by gas chromatography coupled to mass spectrometry (GC-MS). DLS results suggest nanoemulsion (NE) particle sizes smaller than 735 nm and SEM images showed spherical and cuboid shapes. FTIR spectra indicate peaks at 1640 cm-1 and 1440 cm-1, referring to the benzene ring, and the C-H stretching band from 2970 cm-1-2870 cm-1 indicates the interaction between EOsST and TX-100. GC-MS reveals that the major compounds present on EOsST were alpha-pinene, germacrene-D, and beta-pinene. U. brizantha seed germination was reduced at doses >2 mg mL-1 and completely inhibited at 32 mg mL-1. For L. sativa there was a reduction in germination which was dose-dependent and no dose caused total inhibition. Moreover, a decrease in photosynthetic pigments, flavonoids, phe-nolics, and total tannins was observed. Enzyme activity was altered, with reduction to catalase and peroxidase. (AU)

• Processo FAPESP: 22/00045-3 - Respostas ao estresse antioxidante de plantas de soja cultivadas na presença de nanopartículas projeto (18/25207-0): Nanometalômica aplicada ao cultivo da soja para estudar os efeitos das nanopartículas relacionadas a metal
• Beneficiário: Jaqueline da Silva Santos
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado