FvVE1 regulates biosynthesis of the mycotoxins fumonisins and fusarins in Fusarium verticillioides.

FvVE1 regulates biosynthesis of the mycotoxins fumonisins and fusarins in Fusarium verticillioides.
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DOI:
10.1021/jf900783u
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发表时间:
2009-06-10
影响因子:
6.1
通讯作者:
Calvo AM
Calvo AM
中科院分区:
农林科学1区
文献类型:
--
作者:
Myung K;Li S;Butchko RA;Busman M;Proctor RH;Abbas HK;Calvo AM

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veA基因正调控灰曲霉体内sterigmatocystin的产生,以及寄生蜂和黄曲霉体内黄曲霉毒素的产生。在其他真菌属中,veA同源物是否在调节次生代谢中起作用尚不清楚。在这项研究中,我们研究了veA同源物FvVE1在重要的玉米病原菌黄萎病杆菌中两个真菌毒素家族——伏马菌素和fusarins产生的作用。我们发现FvVE1缺失完全抑制了玉米和水稻两种天然底物伏马菌素的产生。此外,我们的研究结果表明,FvVE1是富马菌素生物合成基因(FUM)簇中通路特异性调控基因FUM21和结构基因表达所必需的。FvVE1的缺失也阻断了fusarins的产生。在两种不同的交配类型中,FvVE1缺失对这些毒素产生的影响是相同的。我们的研究结果强烈提示FvVE1在调节黄萎病霉毒素的产生中起重要作用。
The veA gene positively regulates sterigmatocystin production in Aspergillus nidulans and aflatoxin production in A. parasiticus and A. flavus. Whether veA homologs have a role in regulating secondary metabolism in other fungal genera is unknown. In this study, we examined the role of the veA homolog, FvVE1, on production of two mycotoxin families, fumonisins and fusarins, in the important corn pathogen F. verticillioides. We found that FvVE1 deletion completely suppressed fumonisin production on two natural substrates, corn and rice. Furthermore, our results revealed that FvVE1 is necessary for the expression of the pathway-specific regulatory gene FUM21 and structural genes in the fumonisin biosynthetic gene (FUM) cluster. FvVE1 deletion also blocked production of fusarins. The effects of FvVE1 deletion on the production of these toxins were found to be the same in two separate mating types. Our results strongly suggest that FvVE1 play an important role in regulating mycotoxin production in F. verticillioides.
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