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Isolation and identification of an endophytic fungus Pezicula sp. in Forsythia viridissima and its secondary metabolites

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Abstract

In a survey of endophytic fungal biodiversity, an antimicrobial endophytic isolate zjwcf069 was obtained from twigs of Forsythia viridissima, Zhejiang Province, Southeast China. Zjwcf069 was then identified as Pezicula sp. through combination of morphological and phylogenetic analysis based on ITS-rDNA. Zjwcf069 here represented the first endophytic fungus in Pezicula isolated from host F. viridissima. From the fermentation broth, four compounds were obtained through silica gel column chromatography and Sephadex LH-20 under the guide of bioassay. Their structures were elucidated by spectroscopic analysis as mellein (1), ramulosin (2), butanedioic acid (3), and 4-methoxy-1(3H)-isobenzofuranone (4). Compound 4 here stood for the very first time as natural product from microbes. In vitro antifungal assay showed that compound 1 displayed growth inhibition against 9 plant pathogenic fungi, especially Botrytis cinerea and Fulvia fulva with EC50 values below 50 μg/mL. Endophytic fungi in medicinal plants were good resources for bioactive secondary metabolites.

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Acknowledgments

This research was financially supported by the Zhejiang Provincial National Natural Science Foundation of China (No. LQ13H280005) and Open Research Fund Program of the Laboratory of Hangzhou Normal University (No. 2013040).

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Authors and Affiliations

  1. State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China

    Jiaying Wang & Chulong Zhang

  2. Department of Pharmaceutical Science, College of Medical Science, Hangzhou Normal University, Hangzhou, 310036, China

    Liwei Wang

  3. Zhejiang Dayang Biotechnology Group Co., Ltd, Hangzhou, 311616, China

    Guoping Wang & Biqiang Zheng

  4. College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, 310029, China

    Yalei Zhang

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  1. Jiaying Wang
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  2. Guoping Wang
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  3. Yalei Zhang
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  4. Biqiang Zheng
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  5. Chulong Zhang
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  6. Liwei Wang
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Correspondence to Liwei Wang.

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Wang, J., Wang, G., Zhang, Y. et al. Isolation and identification of an endophytic fungus Pezicula sp. in Forsythia viridissima and its secondary metabolites. World J Microbiol Biotechnol 30, 2639–2644 (2014). https://doi.org/10.1007/s11274-014-1686-0

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  • DOI: https://doi.org/10.1007/s11274-014-1686-0

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