Autor(es):
Souza, Diego Pereira ; Pimentel, Renah Boanerges de Queiroz ; Santos, Alberdan Silva ; Albuquerque, Patrícia Melchionna ; Fernandes, Andréia Varmes ; Duvoisin Júnior, Sérgio ; Oliveira, José Tadeu A.Abreu ; Ramos, Márcio Viana ; Rathinasabapathi, Bala ; Gonçalves, José Francisco Carvalho de
Data: 2020
Origem: Oasisbr
Assunto(s): Agricultural Chemicals; Alcohols; Aspergillus; Cell Membranes; Cell Proliferation; Damage Detection; Disease Control; Gas Chromatography; Gas Oils; Mass Spectrometry; Nucleic Acids; 1-nitro-2-phenylethane; Antifungal; Anti-fungal Properties; Colletotrichum Gloeosporioides; Gas Chromatography-mass Spectrometry; Leaves; Linalool; Phytopathogenic Fungi; Essential Oils
Descrição
The Amazonian Aniba species are world-renowned for their essential oils (EOs). The molecules derived from EOs have been intensively investigated in regards to their potential for disease control in plants. The aim of this study was to investigate the antifungal properties of Aniba canelilla EO (ACEO) and Aniba parviflora EO (APEO) when used against eight phytopathogenic fungi. Gas chromatography-mass spectrometry (GC–MS) analysis of oils showed that 1-nitro-2-phenylethane (∼80%) and linalool (∼40%) are the major compounds in ACEO and APEO, respectively. The ACEO and APEO treatments displayed remarkable antifungal effects against Aspergillus flavus, Aspergillus niger, Fusarium oxysporum, Fusarium solani, Alternaria alternata, Colletotrichum gloeosporioides, Colletotrichum musae and Colletotrichum guaranicola, for which the IC50 values ranged from 0.05 to 0.28 μL mL−1 and 0.17 to 0.63 μL mL−1, respectively. Furthermore, the oil caused the inhibition of conidial germination by at least 83% for ACEO and 78% for APEO. The ACEO and APEO at 5 μL mL−1 induced leakage of nucleic acids and protein, suggesting that inhibition could be linked to the breakdown of membrane integrity of the conidia. In addition, the detection of fluorescent dye propidium iodide (PI) on F. solani conidia treated with ACEO and APEO indicates damage on the conidia cytoplasmic membrane. The findings of this study may be of biotechnological interest for the development of new plant protection products, with the advantage of being less harmful than the agrochemicals currently available. © 2019 Elsevier B.V.
