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Fumigant antifungal activity of Corymbia citriodora and Cymbopogon nardus essential oils and citronellal against three fungal species.

Aguiar RW, Ootani MA, Ascencio SD, Ferreira TP, Dos Santos MM, dos Santos GR - ScientificWorldJournal (2014)

Bottom Line: The essential oils and citronellal were tested for their fumigant antifungal activity against Pyricularia (Magnaporthe) grisea, Aspergillus spp., and Colletotrichum musae.The contact assay using the essential oils and citronellal showed growth inhibition of the three fungal species.This showed that the crude component of essential oils of C. citriodora and C. nardus markedly suppressed spore production, germination, and growth inhibition of P. grisea, Aspergillus spp., and Colletotrichum musae.

View Article: PubMed Central - PubMed

Affiliation: Universidade Federal do Tocantins, Campus Universitário de Gurupi, 77410-530 Gurupi, TO, Brazil.

ABSTRACT
Corymbia citriodora and Cymbopogon nardus essential oils samples were analyzed by GC and GC-MS and their qualitative and quantitative compositions established. The main component of essential oils of C. citriodora and C. nardus was citronellal, at 61.78% and 36.6%, respectively. The essential oils and citronellal were tested for their fumigant antifungal activity against Pyricularia (Magnaporthe) grisea, Aspergillus spp., and Colletotrichum musae. The minimum inhibitory concentration (MIC) ranged from 100 to 200 ppm for the essential oils and 25 to 50 mg · mL(-1) for citronellal. The contact assay using the essential oils and citronellal showed growth inhibition of the three fungal species. However, a concentration of 1.47 mg · mL(-1) only reduced the inhibition of Aspergillus growth to 90% at 14 days of exposure. For the fumigant assay, 0.05, 0.11, and 0.23 mg · mL(-1) of essential oils and citronellal drastically affected growth of P. grisea, Aspergillus spp., and C. musae. Harmful effects on the sporulation and germination of the three fungi were seen, and there was complete inhibition at 0.15 mg · mL(-1) with both oils and citronellal. This showed that the crude component of essential oils of C. citriodora and C. nardus markedly suppressed spore production, germination, and growth inhibition of P. grisea, Aspergillus spp., and Colletotrichum musae.

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Effects of essential oils of C. nardus, C. citriodora, and the major constituent citronellal in PDA on the mycelial development of P. grisea (a), Aspergillus spp. (b), and C. musae (c). Volatile effects of C. nardus, C. citriodora, and citronellal on mycelial development of P. grisea (d), Aspergillus spp. (e), and C. musae (f), 14 days after treatment.
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fig1: Effects of essential oils of C. nardus, C. citriodora, and the major constituent citronellal in PDA on the mycelial development of P. grisea (a), Aspergillus spp. (b), and C. musae (c). Volatile effects of C. nardus, C. citriodora, and citronellal on mycelial development of P. grisea (d), Aspergillus spp. (e), and C. musae (f), 14 days after treatment.

Mentions: The results, presented in Figures 1(a), 1(b), and 1(c), reveal that essential oils of both C. nardus and C. citriodora and citronellal all have a strong effect on the growth of P. grisea, Aspergillus spp., and C. musae. This antifungal activity is comparable to that reported by [22, 24]. The stronger activity of the essential oil of C. nardus and C. citriodora against fungal species may also be because of the antifungal properties of citronellal. This is in agreement with what was observed by [25], who observed that citronellal has a strong effect on the growth of Aspergillus niger. However, other compounds, such as geraniol, α-pinene, β-pinene, myrcene, and linalol, as well as lower concentrations of the essential oils of C. nardus and C. citriodora, have antifungal activity [11].


Fumigant antifungal activity of Corymbia citriodora and Cymbopogon nardus essential oils and citronellal against three fungal species.

Aguiar RW, Ootani MA, Ascencio SD, Ferreira TP, Dos Santos MM, dos Santos GR - ScientificWorldJournal (2014)

Effects of essential oils of C. nardus, C. citriodora, and the major constituent citronellal in PDA on the mycelial development of P. grisea (a), Aspergillus spp. (b), and C. musae (c). Volatile effects of C. nardus, C. citriodora, and citronellal on mycelial development of P. grisea (d), Aspergillus spp. (e), and C. musae (f), 14 days after treatment.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3926400&req=5

fig1: Effects of essential oils of C. nardus, C. citriodora, and the major constituent citronellal in PDA on the mycelial development of P. grisea (a), Aspergillus spp. (b), and C. musae (c). Volatile effects of C. nardus, C. citriodora, and citronellal on mycelial development of P. grisea (d), Aspergillus spp. (e), and C. musae (f), 14 days after treatment.
Mentions: The results, presented in Figures 1(a), 1(b), and 1(c), reveal that essential oils of both C. nardus and C. citriodora and citronellal all have a strong effect on the growth of P. grisea, Aspergillus spp., and C. musae. This antifungal activity is comparable to that reported by [22, 24]. The stronger activity of the essential oil of C. nardus and C. citriodora against fungal species may also be because of the antifungal properties of citronellal. This is in agreement with what was observed by [25], who observed that citronellal has a strong effect on the growth of Aspergillus niger. However, other compounds, such as geraniol, α-pinene, β-pinene, myrcene, and linalol, as well as lower concentrations of the essential oils of C. nardus and C. citriodora, have antifungal activity [11].

Bottom Line: The essential oils and citronellal were tested for their fumigant antifungal activity against Pyricularia (Magnaporthe) grisea, Aspergillus spp., and Colletotrichum musae.The contact assay using the essential oils and citronellal showed growth inhibition of the three fungal species.This showed that the crude component of essential oils of C. citriodora and C. nardus markedly suppressed spore production, germination, and growth inhibition of P. grisea, Aspergillus spp., and Colletotrichum musae.

View Article: PubMed Central - PubMed

Affiliation: Universidade Federal do Tocantins, Campus Universitário de Gurupi, 77410-530 Gurupi, TO, Brazil.

ABSTRACT
Corymbia citriodora and Cymbopogon nardus essential oils samples were analyzed by GC and GC-MS and their qualitative and quantitative compositions established. The main component of essential oils of C. citriodora and C. nardus was citronellal, at 61.78% and 36.6%, respectively. The essential oils and citronellal were tested for their fumigant antifungal activity against Pyricularia (Magnaporthe) grisea, Aspergillus spp., and Colletotrichum musae. The minimum inhibitory concentration (MIC) ranged from 100 to 200 ppm for the essential oils and 25 to 50 mg · mL(-1) for citronellal. The contact assay using the essential oils and citronellal showed growth inhibition of the three fungal species. However, a concentration of 1.47 mg · mL(-1) only reduced the inhibition of Aspergillus growth to 90% at 14 days of exposure. For the fumigant assay, 0.05, 0.11, and 0.23 mg · mL(-1) of essential oils and citronellal drastically affected growth of P. grisea, Aspergillus spp., and C. musae. Harmful effects on the sporulation and germination of the three fungi were seen, and there was complete inhibition at 0.15 mg · mL(-1) with both oils and citronellal. This showed that the crude component of essential oils of C. citriodora and C. nardus markedly suppressed spore production, germination, and growth inhibition of P. grisea, Aspergillus spp., and Colletotrichum musae.

Show MeSH
Related in: MedlinePlus