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- Title
Identification and Bioactivity of Compounds from the Mangrove Endophytic Fungus Alternaria sp.
- Authors
Jinhua Wang; Weijia Ding; Ruimin Wang; Yipeng Du; Huanliang Liu; Xuehua Kong; Chunyuan Li
- Abstract
Racemic new cyclohexenone and cyclopentenone derivatives, (±)-(4R*,5S*,6S*)-3-amino-4,5,6-trihydroxy-2-methoxy-5-methyl-2-cyclohexen-1-one (1) and (±)-(4S*,5S*)-2,4,5-trihydroxy-3-methoxy-4-methoxycarbonyl-5-methyl-2-cyclopenten- 1-one (2), and two new xanthone derivatives 4-chloro-1,5-dihydroxy-3-hydroxymethyl-6- methoxycarbonyl-xanthen-9-one (3) and 2,8-dimethoxy-1,6-dimethoxycarbonyl-xanthen- 9-one (4), along with one known compound, fischexanthone (5), were isolated from the culture of the mangrove endophytic fungus Alternaria sp. R6. The structures of these compounds were elucidated by analysis of their MS (Mass), one and two dimensional NMR (nuclear magnetic resonance) spectroscopic data. Compounds 1 and 2 exhibited potent ABTS [2,2'-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid)] scavenging activities with EC50 values of 8.19 ± 0.15 and 16.09 ± 0.01 µM, respectively. In comparison to Triadimefon, compounds 2 and 3 exhibited inhibitory activities against Fusarium graminearum with minimal inhibitory concentration (MIC) values of 215.52 and 107.14 µM, respectively, and compound 3 exhibited antifungal activity against Calletotrichum musae with MIC value of 214.29 µM.
- Subjects
ENDOPHYTIC fungi; MANGROVE plants; BIOACTIVE compounds; CYCLOHEXENONES; CYCLOPENTENONE; ANTIFUNGAL agents
- Publication
Marine Drugs, 2015, Vol 13, Issue 7, p4492
- ISSN
1660-3397
- Publication type
Article
- DOI
10.3390/md13074492