A SIX1 Homolog in Fusarium oxysporum f. sp conglutinans Is Required for Full Virulence on Cabbage
文献类型： 外文期刊
作者： Li, Erfeng 1 ; Wang, Gang 1 ; Xiao, Jiling 2 ; Ling, Jian 1 ; Yang, Yuhong 1 ; Xie, Bingyan 1 ;
作者机构： 1.Chinese Acad Agr Sci, Inst Vegetables & Flowers, Beijing 100081, Peoples R China
2.Hunan Watermelon & Muskmelon Inst, Changsha 410125, Hunan, Peoples R China
期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）
ISSN： 1932-6203
年卷期： 2016 年 11 卷 3 期
页码：
收录情况： SCI
摘要： Fusarium oxysporum is a soil-born fungus that induces wilt and root rot on a variety of plants. F. oxysporum f. sp. conglutinans (Foc) can cause wilt disease on cabbage. This study showed that a homolog of SIX1 protein in the Arabidopsis infecting isolate Fo5176 (Fo5176-SIX1) had four isoforms in the conidia of Foc by proteomic analysis. Thus, we analyzed the roles of protein Foc-SIX1. Gene expression analysis showed that, compared to the expression in mycelia, dramatically altered expression of Foc-SIX1 could be detected after infecting cabbages, and Foc-SIX1 was highly expressed in conidia under axenic culture condition. Furthermore, we knocked out the Foc-SIX1 gene and found that Foc-Delta SIX1 mutants had significantly reduced virulence compared with wild type isolate, and full virulence was restored by complementation of Foc-Delta SIX1 mutants with Foc-SIX1. Thus, we concluded that SIX1 in Foc was required for full virulence on cabbage. We also complemented Foc-Delta SIX1 with SIX1 gene in F. oxysporum f. sp. lycopersici (Fol) and found Foc-Delta SIX1::Fol-SIX1 mutants did not affect the virulence of Foc-Delta SIX1. The results confirmed that Fol-SIX1 was not capable of replacing the role of Foc-SIX1 in Foc on the disease symptom development of cabbage. The roles of Fol-SIX1 on virulence might rely on host specificity.
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