Issue 66, 2018, Issue in Progress

Phytotoxicity and anti-phytopathogenic activities of marine-derived fungi and their secondary metabolites

Abstract

To find new pesticides for agricultural use, 133 fungal strains were isolated from coastal marine habitats, from which 37 independent isolates were identified, belonging to 20 genera in nine orders, and the diversity of the isolated fungi were discussed. The phytotoxicity and anti-phytopathogenic fungal and bacterial activities of these 37 extracts, and two previously isolated fungal extracts were evaluated, displaying different levels of bioactivity. Based on the bioactive and chemical screening, an Alternaria sp. (P8) strain, which showed prominent bioactivity and contained abundant secondary metabolites was selected for further chemical investigation; one new compound, a benzopyranone (1), and seven known compounds (2–8) were obtained. Their structures were determined by analysing extensive NMR spectroscopic data and ECD comparisons. Compounds 1, 2, and 6–8 showed obvious phytotoxicity, especially against amaranth, and compound 1 also showed potent antifungal activity toward Alternaria brassicicola. To the best of our knowledge, this is the first report of the phytotoxicity of marine-derived fungi and their secondary metabolites. These studies should provide the foundation for future research into the use of such fungal extracts to combat weeds and diseases in agriculture.

Graphical abstract: Phytotoxicity and anti-phytopathogenic activities of marine-derived fungi and their secondary metabolites

Supplementary files

Article information

Article type
Paper
Submitted
28 Sep 2018
Accepted
26 Oct 2018
First published
08 Nov 2018
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2018,8, 37573-37580

Phytotoxicity and anti-phytopathogenic activities of marine-derived fungi and their secondary metabolites

R. Huang, J. Gou, D. Zhao, D. Wang, J. Liu, G. Ma, Y. Li and C. Zhang, RSC Adv., 2018, 8, 37573 DOI: 10.1039/C8RA08047J

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