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A Natural Variation of Fumonisin Gene Cluster Associated with Fumonisin Production Difference in Fusarium fujikuroi

1
The United Graduate School of Agricultural Science, Gifu University, Gifu 501-1193, Japan
2
Faculty of Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan
3
Faculty of National Food Research Institute, NARO, Tsukuba 305-8642, Japan
4
River Basin Research Center, Gifu University, Gifu 501-1193, Japan
5
Life Science Research Center, Gifu University, Gifu 501-1193, Japan
*
Author to whom correspondence should be addressed.
Toxins 2019, 11(4), 200; https://doi.org/10.3390/toxins11040200
Received: 12 February 2019 / Revised: 14 March 2019 / Accepted: 21 March 2019 / Published: 3 April 2019
(This article belongs to the Section Mycotoxins)
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Abstract

Fusarium fujikuroi, a member of the Fusarium fujikuroi species complex, stands out as a rice bakanae disease pathogen with a high production of gibberellic acid. Not all, but some F. fujikuroi strains are known to produce a carcinogenic mycotoxin fumonisin. Fumonisin biosynthesis is dependent on the FUM cluster composed of 16 FUM genes. The FUM cluster was detected not only from a fumonisin producing strain, but also from a fumonisin nonproducing strain that does not produce a detectable level of fumonisin. Genetic mapping indicated the causative mutation(s) of fumonisin nonproduction is present in the FUM cluster of the fumonisin nonproducing strain. Comparative analyses of FUM genes between the fumonisin producing and the nonproducing strains and gene complementation indicated that causative mutation of fumonisin nonproduction is not a single occurrence and the mutations are distributed in FUM21 and FUM7. Our research revealed a natural variation in the FUM cluster involving fumonisin production difference in F. fujikuroi. View Full-Text
Keywords: rice bakanae; polyketide mycotoxin; gene diversity; transcriptional regulator; pre-termination rice bakanae; polyketide mycotoxin; gene diversity; transcriptional regulator; pre-termination
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Sultana, S.; Kitajima, M.; Kobayashi, H.; Nakagawa, H.; Shimizu, M.; Kageyama, K.; Suga, H. A Natural Variation of Fumonisin Gene Cluster Associated with Fumonisin Production Difference in Fusarium fujikuroi. Toxins 2019, 11, 200.

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