Cucurbitacins protect cucumber tissue against infection by Botrytis cinerea

Bar-Nun, Nurit; Mayer, Alfred M.

doi:10.1016/0031-9422(90)80019-d

Cited by 56 publications

(18 citation statements)

References 15 publications

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“…This compound induced efflux of phosphorous from B. cinerea mycelium, suggesting that their effect is mainly by affecting membrane permeability (Cotoras et al, 2004). Bar-Nun and Mayer, 1990). This effect is because that cucurbitacin specifically reduced the amount of mRNA coding for laccase (Gonen et al, 1996).…”

Section: Trans-caftaric Trans-and Cis-cautaric and Trans-cou-mentioning

confidence: 97%

Induced plant secondary metabolites for phytopatogenic fungi control: a review

Ribera

Zúñiga

2012

J. Soil Sci. Plant Nutr.

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Pathogenic fungi constitute one of the main infectious agents in plants, causing alterations during developmental stages including post-harvest. Phytopathogenic fungi are controlled by synthetic fungicides; however, the use of these is progressively restricted due to both, the harmful effects of pesticides on the environment and human health and the appearance of highly resistant fungal strains. Therefore, there is a great demand for novel natural fungicides. Higher plants are rich source of bioactive secondary metabolites of wide variety such as tannins, terpenoids, saponins, alkaloids, flavonoids, and other compounds, reported to have in vitro antifungal properties. Thus, secondary metabolites with antifungal activity represent an alternative for achieving a sustainable control of phytopathogenic fungi and to reduce the heavy reliance of synthetic pesticides used to control them. Plant antifungal metabolites may be preformed inhibitors that are present constitutively in healthy plants (phytoanticipins), or they may be synthesized de novo in response to pathogen attack or another stress conditions (phytoalexins). These molecules may be used directly or considered as a precursor for developing better fungicidal molecules. This review presents a selection of antifungal agents induced in plants during fungal attack that can be potentially used for phytopathogenic fungi control in crops.

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Section: Trans-caftaric Trans-and Cis-cautaric and Trans-cou-mentioning

confidence: 97%

Induced plant secondary metabolites for phytopatogenic fungi control: a review

Ribera

Zúñiga

2012

J. Soil Sci. Plant Nutr.

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“…Cucurbitacins have been shown to have antifungal (Bar-Nun & Mayer, 1990), cytotoxic (Mata et al, 1990;Arisawa et al, 1997), and antineoplastic (Konoshima et al, 1995) properties. They are toxic to many vertebrate and invertebrate herbivores (reviewed in Metcalf & Lampman, 1989) and can deter feeding on cucurbits by nonadapted phytophagous insects (Tallamy et al, 1997b).…”

Section: Introductionmentioning

confidence: 99%

Effects of age, sex, and dietary history on response to cucurbitacin in Acalymma vittatum

Smyth

Tallamy

Renwick

et al. 2002

Entomologia Exp Applicata

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The chrysomelid Acalymma vittatum is stenophagous, subsisting almost entirely on plants in the Cucurbitaceae, which generally contain cucurbitacins. Cucurbitacins are extremely bitter tetracyclic triterpenoids that are toxic to most organisms. As do other diabroticite beetles, A. vittatum sequester cucurbitacins, which have been shown to act as phagostimulants and arrestants. Our results reveal, however, that for A. vittatum the response to cucurbitacin diminishes with continued sequestration. Colony-reared A. vittatum were fed only roots (as larvae) and foliage of either 'Marketmore 76' (which contains a normal amount of cucurbitacin, 'bitter') or 'Marketmore 80' (a near isogenic line that contains no cucurbitacin, 'non-bitter') cucumber. Over 1200 individual beetles from the day of adult emergence to 15 days following emergence were placed in choice and no-choice arenas containing potted cotyledons of the two cucumber varieties for 24 h. In choice tests, overall preference for the bitter cucumber cultivar was maintained, but degree of preference changed with age and became significantly less for beetles reared on bitter diets. Furthermore, in no-choice tests, age, sex, dietary history, and interactions among these variables all significantly affected the feeding response to cucurbitacin. For A. vittatum reared without cucurbitacin, total consumption of the bitter cultivar increased over time. For beetles reared with cucurbitacin, total foliage consumption of the bitter cultivar declined, within nine days, to equal that of the non-bitter cultivar. Feral A. vittatum, unexpectedly, consumed more of the non-bitter than the bitter cultivar in no-choice tests. Ecological and applied implications of this variation in response to cucurbitacin are discussed.

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“…Dentro de estas opciones están las plantas, cuyo efecto antiparasitario se ha corroborado, tanto por su uso tradicional como por tener algunos metabolitos con propiedades antihelmínticas (16,17). Las investigaciones se han encaminado a identificar compuestos antihelmínti-cos para determinar su seguridad y eficacia (18).…”

Section: Introductionunclassified

Evaluación del efecto de las artemisininas provenientes del extracto etanólico de Artemisia cina sobre L3 de Haemonchus contortus en una técnica de explantes abomasales

et al. 2016

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Evaluación del efecto de las artemisininas provenientes del extracto etanólico de Artemisia cina sobre L3 de Haemonchus contortus en una técnica de explantes abomasales Effect evaluation of artemisinins from ethanolic extract of Artemisia cina against L3 of Haemonchus contortus on a abomasal explants techniqueRosa Isabel Higuera-Piedrahita ResumenEl nuevo enfoque de control integrado de parásitos obliga a buscar alternativas que consideren el medioambiente, es decir, sostenibles y sustentables. El objetivo de este trabajo fue fraccionar el extracto etanólico de la planta Artemisia cina, obtener artemisininas y conocer el efecto de estas sobre la capacidad de asociación de las L 3 de Haemonchus contortus en explantes abomasales. El extracto etanólico se fraccionó por medio de la metodología establecida para Artemisia japónica, y se identificaron las artemisininas por medio de cromatografía en capa fina, teniendo como referencia artemisininas comerciales. Las artemisininas se utilizaron sobre L 3 desenvainada, se realizó la técnica de explantes abomasales por triplicado y se compararon así: levamisol (7.5 mg/ml), artemisinina comercial (1 mg/ml), agua y seis diferentes fracciones de A. cina a dosis de 1 mg/ml: Ac3k, Ac3b, Ac3a, Ac3h, Ac3i, Ac4b. No se obtuvieron diferencias significativas entre las fracciones de A. cina y artemisinina comercial (p>0.05). Se concluye que no existió efecto de las artemisininas obtenidas del extracto etanólico de A. cina sobre la capacidad AbstractThe new approach of integrated nematode control has driven to look for other alternatives that consider steadily and sustainable the environment. The aim of the present study was to obtain different ethanolic fracctions from Artemisia cina plant, using artemisinins, and to evaluate the nematicide association capacity effect with infective larvae (L 3 ) and abomasal explant. The artemisinins from A. cina were obtained by thin layer chromatography and were evaluated on unsheathed L 3 of Haemonchus contortus. The abomasal technique explants were performed for triplicate and compared as follows: three control with levamisole (7.5 mg/ml), commercial artemisinin (1 mg/ml), and distillate water, and six A. cina fracctions at 1 mg/ml each one: Ac3k, Ac3b, Ac3a, Ac3h, Ac3i and Ac4b. No significant differences between fractions of A. cina and commercial artemisinin (p>0.05) were obtained. These findings led us to conclude that there was no association capacity effect of fractions of A. cina on unsheathed L 3 of H. contortus, to the abomasal tissue. It is important to continue with more studies to determine the parasitic phase in which the artemisinin viability is susceptible to be affected.Keywords: abomasal explants; Artemisia cina; artemisinin; ethanolic extract; Haemonchus contortus. Rosa IsabelHiguera-Piedrahita, María Eugenia López-Arellano, Raquel López-Arellano, César Cuenca-Verde, Jorge Alfredo Cuéllar- IntroducciónLas endoparasitosis en ovinos son de las enfermedades más impactantes en los sistemas extensivos; el tratamiento y las posible...

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Cucurbitacins protect cucumber tissue against infection by Botrytis cinerea

Cited by 56 publications

References 15 publications

Induced plant secondary metabolites for phytopatogenic fungi control: a review

Induced plant secondary metabolites for phytopatogenic fungi control: a review

Effects of age, sex, and dietary history on response to cucurbitacin in Acalymma vittatum

Evaluación del efecto de las artemisininas provenientes del extracto etanólico de Artemisia cina sobre L3 de Haemonchus contortus en una técnica de explantes abomasales

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