Toxicity of lignans to symbiotic fungus of leaf-cutting ants

Pagnocca, Fernando Carlos; Ribeiro, Stelamaris B.; Torkomian, Vera L. V.; Hebling, M. J. A.; Bueno, Odair Corrêa; Silva, O. A. Da; Fernandes, João B.; Vieira, Paulo C.; Silva, M. F. Das G. F. Da; Ferreira, Antônio G.

doi:10.1007/bf02266969

Cited by 30 publications

(27 citation statements)

References 10 publications

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“…Leafcutting ants protect the mutualistic fungus from parasites and potentials competitors (7,8), while the fungus is an essential food source for the larvae and queen (17,20). Other ants in the nests have plant sap as an important food source (23 (14,21,22).…”

Section: Fungus-growing Ants Are Distributed Only In the Newmentioning

confidence: 99%

Comparison of radial growth rate of the mutualistic fungus of Atta sexdens rubropilosa forel in two culture media

Miyashira¹,

Tanigushi²,

Gugliotta³

et al. 2010

Braz. J. Microbiol.

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In vitro culture of the mutualistic fungus of leaf-cutting ants is troublesome due to its low growth rate, which leads to storage problems and contaminants accumulation. This paper aims at comparing the radial growth rate of the mutualistic fungus of Atta sexdens rubropilosa Forel in two different culture media (Pagnocca B and MEA LP). Although total MEA LP radial growth was greater all along the bioassay, no significant difference was detected between growth efficiencies of the two media. Previous evidences of low growth rate for this fungus were confirmed. Since these data cannot point greater efficiency of one culture medium over the other, MEA LP medium is indicated for in vitro studies with this mutualistic fungus due its simpler composition and translucent color, making the analysis easier.

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Section: Fungus-growing Ants Are Distributed Only In the Newmentioning

confidence: 99%

Comparison of radial growth rate of the mutualistic fungus of Atta sexdens rubropilosa forel in two culture media

Miyashira¹,

Tanigushi²,

Gugliotta³

et al. 2010

Braz. J. Microbiol.

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“…Fraction 6 (160.8 mg) was submitted to chromatographic separations on silica gel columns using as eluents hexane, CH 2 Cl 2 and MeOH, and yielding the triterpene benzoates 1 (10.2 mg) and 2 (1.0 mg). Leucoagaricus gongylophorus growth inhibition assay: as described by Pagnocca et al 5,6 .…”

Section: Extraction and Isolation Of The Chemical Constituentsmentioning

confidence: 99%

“…These ants are known as serious pest in agriculture and forestry in Brazil 4 . During the last decade we have been looking for a natural control of this pest without ecological injury, working on toxicity and repellence of plant extracts and plant products potentially toxic to Atta and their symbiotic fungus [5][6][7] . This report deals with the isolation and identification of new lupane triterpene benzoates, from the chloroform extract of the stem bark from P. teapensis and the test of antifungal activity of the isolated compounds.…”

Section: Introductionmentioning

confidence: 99%

Triterpene benzoates from the bark of Picramnia teapensis (Simaroubaceae)

Rodrı́guez-Gamboa¹,

Fernandes²,

Filho³

et al. 2001

J. Braz. Chem. Soc.

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“…6 The search for specific compounds directed against these ants and their microbial partners has been the focus of our studies during the past years and natural chemicals isolated from a variety of plant species were effective against the ants and inhibited the growth of their symbiotic fungus or both. [6][7][8][9][10][11][12][13][14][15] Among the several biological properties of coumarins we can find dermal photosensitising, estrogenic, antimicrobial, vasodilator, molluscicidal, antihelmintic, J. Braz. Chem.…”

Section: Introductionmentioning

confidence: 99%

Inhibition of the symbiotic fungus of leaf-cutting ants by coumarins

Godoy

Victor

Bellini

et al. 2005

J. Braz. Chem. Soc.

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Formigas cortadoras de folhas são consideradas pragas para a agricultura devido à grande quantidade de material vegetal utilizado por elas para cultivar um fungo simbionte que lhes serve de alimento e enzimas. O mutualismo entre o fungo e as formigas é um ponto a ser explorado quando se considera sua possível aplicação em métodos alternativos para o controle desses insetos. Sabendose que algumas plantas são naturalmente resistentes aos insetos fitófagos, alguns produtos naturais (metabólitos secundários) devem ser avaliados em relação às suas propriedades inseticidas e/ou fungicidas. Neste trabalho foram isoladas oito cumarinas de quatro espécies de plantas e o efeito no desenvolvimento do fungo simbionte das formigas cortadeiras Atta sexdens foi determinado. Com exceção da clausarina, todas as outras cumarinas foram inibitórias de 64 µg mL -1 à 80 µg mL -1 sendo que a xantiletina inibiu o fungo na concentração de 25 µg mL -1 .Leaf-cutting ants are known to be a serious pest for agriculture due to the high amounts of vegetal matter from crops used by them in order to cultivate a symbiotic fungus on which they rely for food and enzymes. The mutualism between the fungus and the ants is a point to be explored when alternative methods of control are being thought of. Considering that some plants are naturally resistant to phytophagous insects, some natural products (secondary metabolites) should be evaluated with respect to their insecticide and/or fungicide properties. In this paper we isolated eight coumarins from four different plant species and we determined their effect on the development of the symbiotic fungus of the leaf-cutting ant Atta sexdens. With the exception of clausarin, all the other coumarins were inhibitory from 64 µg mL -1 through 80 µg mL -1 and xanthyletin inhibited the fungus at 25 µg mL -1

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Toxicity of lignans to symbiotic fungus of leaf-cutting ants

Cited by 30 publications

References 10 publications

Comparison of radial growth rate of the mutualistic fungus of Atta sexdens rubropilosa forel in two culture media

Comparison of radial growth rate of the mutualistic fungus of Atta sexdens rubropilosa forel in two culture media

Triterpene benzoates from the bark of Picramnia teapensis (Simaroubaceae)

Inhibition of the symbiotic fungus of leaf-cutting ants by coumarins

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