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Extraction and purification of ustiloxin A from rice false smut balls by a combination of macroporous resin and high-speed countercurrent chromatography
Cited 1 time in
Web of Science
Cited 1 time in Scopus
- Authors
- Issue Date
- 2020-12-08
- Publisher
- BMC
- Citation
- Food Production, Processing and Nutrition. 2020 Dec 08;2(1):29
- Keywords
- Ustiloxin A ; Rice false smut ; Preparative purification ; Macroporous resin ; High-speed counter-current chromatography ; Phytotoxicity assay
- Abstract
- Rice false smut is an emerging plant disease worldwide. Ustiloxin A (UstA) is the major mycotoxin found in rice false smut balls, which are fungal colonies in rice florets. In this study, a new method consisting of macroporous resin column chromatography and high-speed countercurrent chromatography (HSCCC) was developed for UstA separation. UstA was extracted by a 3.81% HCOOH solution and adsorbed by XAD-4 resin. UstA was then eluted by a 40% methanol solution supplemented with 0.1% trifluoroacetic acid (TFA). Further purification was achieved by HSCCC using a two-phase solvent system consisting of n-butanol/TFA/H2O (1/0.05/1, v/v/v). Under the optimized conditions, 225 mg of UstA was obtained with a purity of 97.39% in a single run, with a final recovery of 65.2%. An inhibitory effect on seed germination of wheat and maize caused by UstA was observed in a preliminary phytotoxicity assay.
- ISSN
- 2661-8974
- Language
- English
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