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All Journal HAYATI Journal of Biosciences
Nanang Ariefta
Department of Food, Life, and Environmental Sciences, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences

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Phytotoxic and Cytotoxic Polyketides Produced by Fungal Endophytes Isolated from Psidium guajava Tendy Oktriawan; Nanang Ariefta; Tri Joko Raharjo; Endang Astuti; Takuya Koseki; Yoshihito Shiono
HAYATI Journal of Biosciences Vol. 30 No. 3 (2023): May 2023
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.30.3.473-479

Abstract

Endophytic fungi reside within their host plants with no obvious symptoms. They have been proven as abundant sources of new bioactive compounds with diverse structures. In our continuous search of the new compound from endophytic fungi, a new compound, 5,7-dihydroxy-3(R)-methylphthalide (1), was isolated from Xylaria brevipes PGR1, and three known compounds, (–)-altenuene (2), alternariol (3), and altertoxin I (4), were isolated from Alternaria alternata D-8. Both endophytic fungi were isolated from the branch of an Indonesian medicinal plant, Psidium guajava. Their structures were elucidated using extensive spectroscopy analyses, including 1D/2D NMR, HRESITOFMS, and data comparisons with the literature. Compounds 1–3 exhibited phytotoxicity at IC50 (µg/ml) values of 4.6, 23.07, and 77.28, respectively. Additionally, 1–4 showed significant cytotoxicity in the brine shrimp lethality test (BSLT), with mortality rates at 75%, 50%, 90%, and 80% at the concentration of 0.19 μg/ml, respectively.
Co-Authors Endang Astuti Takuya Koseki Tendy Oktriawan Tri Joko Raharjo Yoshihito Shiono