Effects of Disruption of Five FUM Genes on Fumonisin Biosynthesis and Pathogenicity in Fusarium proliferatum
文献类型： 外文期刊
作者： Sun, Lei 1 ; Chen, Xu 1 ; Gao, Jian 1 ; Zhao, Yuan 1 ; Liu, Lianmeng 1 ; Hou, Yuxuan 1 ; Wang, Ling 1 ; Huang, Shiwen 1 ;
作者机构： 1.China Natl Rice Res Inst, State Key Lab Rice Biol, Hangzhou 310006, Zhejiang, Peoples R China
2.Guangxi Univ, Coll Agron, Nanning 530003, Peoples R China
关键词： Fusarium proliferatum; FUM; fumonisin; pathogenicity
期刊名称：TOXINS （ 影响因子：4.546； 五年影响因子：4.8 ）
ISSN： 2072-6651
年卷期： 2019 年 11 卷 6 期
页码：
收录情况： SCI
摘要： The mycotoxin fumonisin is known to be harmful to humans and animals, and thus it is desirable to reduce fumonisin content in crop products. We explored the functions of several genes that function in fumonisin biosynthesis (FUM1, FUM6, FUM8, FUM19, and FUM21) in Fusarium proliferatum and found that deletion of FUM1, FUM6, FUM8, or FUM21 results in a severe reduction in fumonisin biosynthesis, while loss of FUM19 does not. In addition, fumonisin-deficient strains display significantly decreased pathogenicity. Co-cultivation of the Delta FUM1, Delta FUM6, Delta FUM8, and Delta FUM19 mutants restores fumonisin synthesis. However, co-cultivation was unable to restore fumonisin synthesis in the Delta FUM21 strain. The relative expression levels of three key FUM genes (FUM1, FUM6, and FUM8) differed significantly in each mutant strain; notably, the expression levels of these three genes were significantly down-regulated in the Delta FUM21 strain. Taken together, our results demonstrate that FUM1, FUM6, FUM8, and FUM21 are essential for fumonisin synthesis, and FUM19 is non-essential. Partial mutants lost the ability to synthesize fumonisin, the co-culture of the mutants was able to restore fumonisin biosynthesis. While the pathogenicity of F. proliferatum is affected by many factors, inhibition of the synthesis of the mycotoxin fumonisin will weaken the pathogenicity of rice spikelet rot disease (RSRD).
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