Two novel metabolites with potential antifeedant activity were isolated from cultures of the fungus Trichoderma citrinoviride strain ITEM 4484 grown in solid-state fermentation on sterile rice kernels. The producing strain was identified at species level by sequence analysis of the internal transcribed spacer regions ITS-1 and ITS-2 of the nuclear rDNA and a fragment of the translation elongation factor gene TEF-1R. Fractionation by column chromatography and TLC of the culture organic extract, followed by feeding preference tests on the aphid pest Schizaphis graminum (Rondani), allowed the purification of 5.8 and 8.9 mg/kg of culture of two bioactive metabolites, which were named citrantifidiene and citrantifidiol (1 and 2). Citrantifidiene and citrantifidiol, whose structures were determined by spectroscopic methods (NMR and MS) are a symmetrical disubstituted hexa-1,3dienyl ester of acetic acid and a tetrasubstituted cyclohexane-1,3-diol, respectively. The pure metabolites influenced the feeding preference of S. graminum restraining individuals from feeding on wheat leaves dipped in 5% aqueous methanol solution containing 0.57 mg/mL of citrantifidiene or 0.91 mg/mL of citrantifidiol.

Citrantifidiene and Citrantifidiol: Bioactive Metabolites Produced byTrichoderma citrinoviride with Potential Antifeedant Activity toward Aphids / A., Evidente; G., Ricciardiello; A., Andolfi; Sabatini, Maria Agnese; Ganassi, Sonia; C., Altomare; M., Favilla; D., Melck. - In: JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY. - ISSN 0021-8561. - STAMPA. - 56:10(2008), pp. 3569-3573. [10.1021/jf073541h]

Citrantifidiene and Citrantifidiol: Bioactive Metabolites Produced byTrichoderma citrinoviride with Potential Antifeedant Activity toward Aphids

SABATINI, Maria Agnese;GANASSI, Sonia;
2008

Abstract

Two novel metabolites with potential antifeedant activity were isolated from cultures of the fungus Trichoderma citrinoviride strain ITEM 4484 grown in solid-state fermentation on sterile rice kernels. The producing strain was identified at species level by sequence analysis of the internal transcribed spacer regions ITS-1 and ITS-2 of the nuclear rDNA and a fragment of the translation elongation factor gene TEF-1R. Fractionation by column chromatography and TLC of the culture organic extract, followed by feeding preference tests on the aphid pest Schizaphis graminum (Rondani), allowed the purification of 5.8 and 8.9 mg/kg of culture of two bioactive metabolites, which were named citrantifidiene and citrantifidiol (1 and 2). Citrantifidiene and citrantifidiol, whose structures were determined by spectroscopic methods (NMR and MS) are a symmetrical disubstituted hexa-1,3dienyl ester of acetic acid and a tetrasubstituted cyclohexane-1,3-diol, respectively. The pure metabolites influenced the feeding preference of S. graminum restraining individuals from feeding on wheat leaves dipped in 5% aqueous methanol solution containing 0.57 mg/mL of citrantifidiene or 0.91 mg/mL of citrantifidiol.
56
10
3569
3573
Citrantifidiene and Citrantifidiol: Bioactive Metabolites Produced byTrichoderma citrinoviride with Potential Antifeedant Activity toward Aphids / A., Evidente; G., Ricciardiello; A., Andolfi; Sabatini, Maria Agnese; Ganassi, Sonia; C., Altomare; M., Favilla; D., Melck. - In: JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY. - ISSN 0021-8561. - STAMPA. - 56:10(2008), pp. 3569-3573. [10.1021/jf073541h]
A., Evidente; G., Ricciardiello; A., Andolfi; Sabatini, Maria Agnese; Ganassi, Sonia; C., Altomare; M., Favilla; D., Melck
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/592954
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