Fungitoxic activity of Indian borage (Plectranthus amboinicus) volatiles

Murthy, Pushpa S.; Ramalakshmi, K.; Srinivas, P.

doi:10.1016/j.foodchem.2008.10.064

Cited by 93 publications

(70 citation statements)

References 27 publications

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“…Na Vila Cachoeira é utilizada no tratamento tosse, gripe, verme e hemorróidas (Moreira et al, 2002). Para essa espécie são relatados dois quimiótipos, um rico em timol e outro em carvacrol (Murthy & Srinvas, 2009). Na Índia, o óleo essencial de P. amboinicus é rico em carvacrol (70%) e apresenta propriedades fungitóxicas frente à Aspergillus flavus, Aspergillus niger, Candida versatilis e Fusarium sp (Murthy & Srinvas, 2009).…”

Section: Introductionunclassified

Constituintes voláteis de Mentha pulegium L. e Plectranthus amboinicus (Lour.) Spreng

Oliveira

Duarte

et al. 2011

Rev. bras. plantas med.

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RESUMO:Nesse trabalho foi investigado a composição química de óleos essenciais de duas plantas medicinais cultivadas em Ilhéus, Brasil, Plectranthus amboinicus (Lour.) Spreng. (hortelã-grosso) e Mentha pulegium L. (poejo). Os óleos essenciais foram extraídos das folhas frescas por hidrodestilação e foram analisados por CG/FID e CG-EM, na primavera e no inverno. P. amboinicus forneceu, tanto na primavera como no inverno, 0,10% de óleo sendo timol o componente majoritário. M. pulegium forneceu na primavera 0,20% de óleo e no inverno 0,09%. Os componentes majoritários dos óleos foram pulegona e trans-cariofileno; borneol, mentol e piperitona foram identificados em menores quantidades. No inverno foram observados maiores quantidades de mentol e isomentol. Acetatos de neoisomentila, de mentila e de isometila foram observados somente no inverno. Esse trabalho contribui para o conhecimento das espécies vegetais cultivadas na região do sul da Bahia. . The essential oils were extracted from fresh leaves by hydrodistillation and analyzed by GC-FID and GC-MS, in the spring and in the winter. In both seasons, P. amboinicus yielded 0.10% oil and had thymol as major component. M. pulegium yielded 0.20% and 0.09% oil in the spring and winter, respectively. The major components were pulegone and trans-caryophyllene, whereas borneol, menthol and piperitone were identified at small quantities. Higher menthol and isomenthol levels were detected in the winter. In addition, neoisomenthyl, menthyl and isomenthyl acetates were only observed in the winter. This work contributes to the knowledge of plant species grown in southern Bahia. Palavras

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Section: Introductionunclassified

Constituintes voláteis de Mentha pulegium L. e Plectranthus amboinicus (Lour.) Spreng

Oliveira

Duarte

et al. 2011

Rev. bras. plantas med.

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“…These trichomes might have hindered the larvae such that they do not reach maturity. Extracts from some kinds of plants have been reported to possess antimicrobial activity against plant pathogens and pests (Soylu et al, 2007;Murthy et al, 2009). Borage seeds and leaves contain essential oils and polyphenols that have antioxidant and fungicidal activities (Wettasinghe et al, 2001).…”

Section: Discussionmentioning

confidence: 99%

Performance of eighteen tetranychid mite species (Acari: Tetranychidae) on borage and strawberry

El-Shafei

Gotoh

2010

Appl. Entomol. Zool.

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Borage (Borago officinalis L.) is anticipated as a banker plant in strawberry greenhouses to adopt integrated aphid management, because borage has a stimulatory influence on parasitoid wasps attacking aphids. However, before actually using borage, we had to answer the following question: will borage become a hotbed for spider mites? To investigate this, host plant suitability and acceptance by 18 tetranychid mite species were tested on borage and strawberry leaves. The mites were two Panonychus species, two Eotetranychus species and 14 Tetranychus species, including the green and red forms of T. urticae that were counted as separate species. Borage appeared an unsuitable host, because females of all 18 mite species did not lay eggs, females of most species could not survive for more than 5 days, and larvae of all 18 mite species did not develop to nymphal stages on borage. Conversely, strawberry was a suitable host for 13 of the 18 spider mite species: females laid eggs and about 90% of larvae successfully reached adulthood. Thus, these13 species have the potential to become pests of strawberry. Offering female spider mites the choice between interconnected borage and strawberry leaf discs, (1) most females moved from borage to strawberry except for the two Panonychus species and E. asiaticus, and (2) few females moved from strawberry to either borage or strawberry. Consequently, it is highly unlikely that borage will become a hotbed for any of the spider mite species.

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“…Than the inhibition (I) of growth and inhibition of OTA production were calculated as I (%)=[(K-O)/K]x100, where K was a value taken from the control sample I (CYA medium), and O from the sample where the essential oil or its active substances were added. In cases where the production of OTA was higher than that of the control samples, the stimulation of OTA production was calculated as S (%)=[(O-K)/O]x100 (9,14). Inhibition of growth was calculated from results obtained for P. verrucosum growth as diameter of colony (mm) and inhibition (or stimulation) of OTA production was calculated from results obtained for P. verrucosum production of OTA (µg mL -1 ).…”

Section: Effects Of Essential Oils and Their Active Substances On P mentioning

confidence: 99%

“…Over the last decade, studies have investigated different natural antimicrobials that might replace these traditionally used chemical additives (9)(10)(11). Chemical preservatives have become less effective and can cause the development of resistant fungal strains (12)(13)(14). There are also increasing consumer demands to reduce the usage of synthetic fungicides and pesticides, and these requirements have led researchers to investigate naturally occurring compounds as alternatives to the use of chemical agents.…”

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Effects of selected essential oils on the growth and production of ochratoxin A by Penicillium verrucosum

Jeršek

Ulrih

Skrt

et al. 2014

Archives of Industrial Hygiene and Toxicology

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Essential oils from oregano (Origanum vulgare L.), mint (Mentha piperita L.), fennel (Foeniculum vulgare Mill.), and pine (Abies alba Mill.) needles and cones, and their active substances thymol, carvacrol, menthol, and anisaldehyde were tested for antifungal activity against Penicillium verrucosum. The lowest minimal inhibitory concentrations (MICs) were achieved for essential oil of oregano, followed by carvacrol, thymol, and menthol. These antifungal components were further investigated, as the main aim of our study was to elucidate the effect of natural antifungals on ochratoxin A production. During 21 days of exposure, the growth of P. verrucosum, and subsequently the production of ochratoxin A, was fully inhibited by thymol at ½ MIC (0.0625 mg mL -1 ), but menthol at ¼ and ½ MIC (0.1875 and 3750 mg mL -1 ) showed no growth inhibition. After 21 days of incubation, the greatest inhibitory effect on ochratoxin production (inhibition was 96.9 %) was also achieved with thymol at ¼ MIC (0.0313 mg mL ) stimulate production of ochratoxin A at 13.9 % to 28.8 %, respectively. The observed antifungal effects depended on the agent, the concentration used, and the time of interaction between the agent and P. verrucosum. Our results indicate the possibility of using oregano essential oil as a substitute for artificial preservatives in certain foods, but further research is needed.

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Fungitoxic activity of Indian borage (Plectranthus amboinicus) volatiles

Cited by 93 publications

References 27 publications

Constituintes voláteis de Mentha pulegium L. e Plectranthus amboinicus (Lour.) Spreng

Constituintes voláteis de Mentha pulegium L. e Plectranthus amboinicus (Lour.) Spreng

Performance of eighteen tetranychid mite species (Acari: Tetranychidae) on borage and strawberry

Effects of selected essential oils on the growth and production of ochratoxin A by Penicillium verrucosum

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