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

Authors

  • Larissa Alves Secundo White Universidade Federal de Sergipe
  • Arie Fitzgerald Blank Universidade Federal de Sergipe
  • Paulo Roberto Gagliardi Universidade Federal de Sergipe
  • Maria de Fátima Arrigoni-Blank Universidade Federal de Sergipe
  • Daniela Aparecida de Castro Nizio Universidade Federal de Sergipe
  • Taís Santos Sampaio Universidade Federal de Sergipe
  • Mércia Freita Alves Universidade Federal de Uberlândia
  • Camila Santos Almeida-Pereira Universidade Federal de Sergipe

DOI:

https://doi.org/10.14393/BJ-v35n6a2019-42425

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.


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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. and 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 [online], vol. 35, no. 6, pp. 1695–1707. [Accessed3 December 2022]. DOI 10.14393/BJ-v35n6a2019-42425. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/42425.

Issue

Section

Agricultural Sciences