A carregar...
Projeto de investigação
Valorization of biomass byproducts as sources of biopesticides through development and application of eco-friendly processes
Financiador
Autores
Publicações
Assessing essential oils from Macaronesia: a study on their efficacy against phytopathogenic and obligate biotrophic fungi
Publication . Ferreira, Rui Miguel; Pereira, Verónica Sousa; Sardinha, Duarte Fernandes; Rodríguez Sabina, Samuel; Cabrera Pérez, Raimundo; Castilho, Paula Machado; Castilho, Paula C
BACKGROUND: Essential oils (EOs) extracted from eight culinary herbs and spices, some endemic to Macaronesia flora (Cedro
nella canariensis, Clinopodium ascendens and Laurus novocanariensis) and others common in Mediterranean cuisine (Cinnamo
mum burmannii, Ocimum gratissimum, Origanum vulgare subsp. virens, Syzygium aromaticum and Thymus vulgaris) were
evaluated via direct-contact bioassays, both in vitro and in vivo, against three species of phytopathogenic fungi (Alternaria
alternata, Botrytis cinerea, and Fusarium oxysporum) and the obligatory biotrophic fungus Oidium farinosum. Carvacrol-rich
Origanum vulgare was selected to study the influence of isomerism on bioactivity, because Thymus vulgaris is rich in thymol,
a structural isomer of carvacrol.
RESULTS:FiveEOsexhibitedstrongtomoderateantifungalactivityandwerefurtherscreenedatlowerconcentrationstoassess
their toxicity and growth inhibition thresholds. Cedronella canariensis showed no antifungal activity, whereas Laurus novoca
nariensis demonstrated only weak activity against Botrytis cinerea. This fungus was more susceptible to the tested EO than
the other phytopathogenic fungi. Origanum vulgare was slightly more effective than Thymus vulgaris, for all three phytopath
ogenic fungi. Ocimum gratissimum, Syzygium aromaticum, and Cinnamomum burmannii significantly reduced powdery mildew
severity, whereas Origanum vulgare and Thymus vulgaris showed moderate activity.
CONCLUSION:Phenylpropanoid-rich EOs, such as Cinnamomum burmannii, Ocimum gratissimum, and S. aromaticum, exhibited
the strongest antifungal activity in both bioassays with phytopathogenic and obligate biotrophicfungi.Ourresults confirmthe
higher antifungal activity of the phenylpropanoid class of EOs.
Unidades organizacionais
Descrição
Palavras-chave
,
Contribuidores
Financiadores
Entidade financiadora
Fundação para a Ciência e a Tecnologia, I.P.
Programa de financiamento
Número da atribuição
2020.07711.BD