In vitro antifungal activity of Myrcia ovata essential oils and their major compounds against pathogens of citrus, sweet potato, and coconut

  • Larissa Alves Secundo White Federal University of Sergipe
  • Arie Fitzgerald Blank Federal University of Sergipe
  • Paulo Roberto Gagliardi Federal University of Sergipe
  • Maria de Fátima Arrigoni-Blank Federal University of Sergipe
  • Daniela Aparecida de Castro Nizio Federal University of Sergipe
  • Taís Santos Sampaio Federal University of Sergipe
  • Mércia Freita Alves Federal University of Sergipe
  • Camila Santos Almeida-Pereira Federal Unviversity of Sergipe
Keywords: Myrtaceae, Colletotrichum acutatum, Plenodomus destruens, Thielaviopsis paradoxa

Abstract

Myrcia ovata, an endemic species to the Brazilian Atlantic Forest, presents antifungal properties. The phytopathogens Colletotrichum acutatum, Plenodomus destruens, and Thielaviopsis paradoxa are responsible for the diseases citrus postbloom fruit drop, sweet potato foot rot, and coconut stem bleeding, respectively. The antifungal activity of the essential oils of five M. ovata chemotypes (MYRO-159, nerolic acid chemotype; MYRO-180, nerolic acid + linalool chemotype; MYRO-388, geraniol chemotype; MYRO-157, citral + (E)-nerolidol chemotype; and MYRO-174, isopulegol + linalool chemotype), four major compounds (nerolic acid, nerolic acid + linalool, geraniol, and citral + (E)-nerolidol), and three pure compounds (citral, (E)-nerolidol, and linalool) against the fungi C. acutatum, P. destruens, and T. paradoxa were evaluated. For this, in vitro tests were conducted in a completely randomized design with three replications, testing concentrations (v/v) ranging from 0.01 to 1.0 μL.mL-1. All treatments presented toxicity at different levels to the three fungi. For C. acutatum, the essential oil from the individual MYRO-180 (nerolic acid + linalool chemotype) and its major compound showed the lowest Minimal Inhibitory Concentration (MIC) and Minimum Fungicidal Concentration (MFC) of 0.03 and 0.1 µL.mL-1, respectively. For P. destruens, the essential oil from the individual MYRO-159 (nerolic acid chemotype) presented the lowest MIC of 0.05 μL.mL-1. The nerolic acid + linalool chemotype and its major compound presented an MFC of 0.07 μL.mL-1. For T. paradoxa, the major compound citral + (E)-nerolidol stood out with the lowest MIC and MFC of 0.03 and 0.2 µL.mL-1, respectively. Linalool presented the lowest toxicity to the three tested fungi.


Downloads

Download data is not yet available.

Author Biographies

Larissa Alves Secundo White, Federal University of Sergipe
Graduate in Forestry Engineering
Master of Science
Doctor of Science
Arie Fitzgerald Blank, Federal University of Sergipe
Professor of Federal University of Sergipe
Paulo Roberto Gagliardi, Federal University of Sergipe
Professor at Federal University of Sergipe
Maria de Fátima Arrigoni-Blank, Federal University of Sergipe
Professor at Federal University of Sergipe
Daniela Aparecida de Castro Nizio, Federal University of Sergipe
Doctor in Biotecnology
Taís Santos Sampaio, Federal University of Sergipe
Doctor in Biotecnology
Mércia Freita Alves, Federal University of Sergipe
Doctor in Biotecnology
Camila Santos Almeida-Pereira, Federal Unviversity of Sergipe
Doctor in Biotecnology
Published
2019-10-15
How to Cite
White, L. A. S., Blank, A. F., Gagliardi, P. R., Arrigoni-Blank, M. de F., Nizio, D. A. de C., Sampaio, T. S., Alves, M. F., & Almeida-Pereira, C. S. (2019). In vitro antifungal activity of Myrcia ovata essential oils and their major compounds against pathogens of citrus, sweet potato, and coconut. Bioscience Journal, 35(6). https://doi.org/10.14393/BJ-v35n6a2019-42425
Section
Agricultural Sciences