Overexpression of FBR41 enhances resistance to sphinganine analog mycotoxin-induced cell death and Alternaria stem canker in tomato

文献类型： 外文期刊

第一作者： Shao, Zhiyong

作者： Shao, Zhiyong;Liu, Lihong;Chen, Shanshan;Meng, Fanliang;Liu, Haoran;Hu, Songshen;Wang, Qiaomei;Zhao, Yanting;Wang, Jiansheng;Li, Chuanyou

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关键词： Alternaria alternata f. sp. lycopersici; AAL-toxin; Fumonisin B1 Resistant41; programmed cell death; sphinganine analog mycotoxin; tomato

期刊名称：PLANT BIOTECHNOLOGY JOURNAL （ 影响因子：9.803； 五年影响因子：9.555 ）

ISSN： 1467-7644

年卷期： 2020 年 18 卷 1 期

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收录情况： SCI

摘要： Fumonisin B1 (FB1) and Alternaria alternate f. sp. lycopersici (AAL)-toxin are classified as sphinganine analog mycotoxins (SAMTs), which induce programmed cell death (PCD) in plants and pose health threat to humans who consume the contaminated crop products. Herein, Fumonisin B1 Resistant41 (FBR41), a dominant mutant allele, was identified by map-based cloning of Arabidopsis FB1-resistant mutant fbr41, then ectopically expressed in AAL-toxin sensitive tomato (Solanum lycopersicum) cultivar. FBR41-overexpressing tomato plants exhibited less severe cell death phenotype upon AAL-toxin treatment. Analysis of free sphingoid bases showed that both fbr41 and FBR41-overexpressing tomato plants accumulated less sphinganine and phytosphingosine upon FB1 and AAL-toxin treatment, respectively. Alternaria stem canker is a disease caused by AAL and responsible for severe economic losses in tomato production, and FBR41-overexpressing tomato plants exhibited enhanced resistance to AAL with decreased fungal biomass and less cell death, which was accompanied by attenuated accumulation of free sphingoid bases and jasmonate (JA). Taken together, our results indicate that FBR41 is potential in inhibiting SAMT-induced PCD and controlling Alternaria stem canker in tomato.

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