Evaluation of biocide effects of Aloysia gratissima (Gillies & Hook.) Tronc. essential oils

Author(s)

de Souza, Caio Marins Rodrigues ; de Oliveira, Lara Zaine Silva ; Vaz, Carolina Ferreira ; Bazon, Jose Norberto ; Vieira, Tatiana Manzini ; Groppo, Milton ; Crotti, Antonio Eduardo Miller ; Dias, Polianna Alves Silva ; Dias, Herbert Junior

• Document type: Journal article
• Source: BIOTECHNOLOGIE AGRONOMIE SOCIETE ET ENVIRONNEMENT; v. 29, n. 1, p. 11-pg., 2025-01-01.

Abstract

Description of the subject. Essential oils are volatile fractions produced through the special metabolism of plants. One significant biological application of essential oils in recent years has been their use as bioherbicides, due to their important biocide effect. Objectives. This study aims to identify the chemical constituents of Aloysia gratissima (Gillies & Hook.) Tronc. essential oil and assess its biocide potential. Method. This study describes, for the first time, the chemical constitution of the essential oils from seeds of A. gratissima. To verify possible biocide effect, lettuce seeds were submitted to different concentrations of essential oils from A. gratissima leaves (AG-LE-EO), flowers (AG-FL-EO), and seeds (AG-SE-EO) to evaluate germination percentage, mean germination time, synchrony of germination, and seedling length. Results. At concentrations of 800 mu l.l-1, synchrony was positively influenced by (AG-LE-EO), increasing from 0.38 to 0.54. On the other hand, AG-SE-EO at concentrations of 800 mu l<middle dot>l-1 reduced lettuce germination from 90.8% to 64.4% and seedling length from 1.35 to 0.8 cm, besides increasing mean germination time, indicating biocide effects. Conclusions. These results are expected to lead to further trials to understand how the constituents of A. gratissima essential oils inhibit germination, making them a potential bioherbicide. (AU)

• FAPESP's process: 22/11451-2 - EMU Collections Infrastructure: acquisition of equipment for generating 2D and 3D radiographic anatomical images from the scientific collections of the Department of Biology at FFCLRP, USP, Ribeirão Preto, for availability on the internet
• Grantee: Fernando Luis Medina Mantelatto
• Support Opportunities: Research Infrastructure Program - Collections
• FAPESP's process: 22/12597-0 - Diversification and enhancement of the collections on the hebaria in the State of São Paulo, with increase of their virtual availability and spatial analysis, for advances in documentation of the Neotropical biodiversity
• Grantee: José Rubens Pirani
• Support Opportunities: BIOTA-FAPESP Program - Thematic Grants
• FAPESP's process: 16/06260-2 - Integrative systematic studies in Neotropical families, with emphasis on Rutaceae, Asteraceae and Rubiaceae
• Grantee: Milton Groppo Júnior
• Support Opportunities: Regular Research Grants