Clade V MLO Genes Are Negative Modulators of Cucumber Defence Response to Meloidogyne incognita
文献类型： 外文期刊
作者： Xie, Xiaoxiao 1 ; Ling, Jian 1 ; Dong, Shaoyun 1 ; Zhai, Mingjuan 1 ; Lu, Junru 1 ; Zhao, Jianlong 1 ; Yang, Xueyong 1 ; Dong, Xin 1 ; Li, Yan 1 ; Visser, Richard G. F. 2 ; Bai, Yuling 2 ; Mao, Zhenchuan 1 ; Zhang, Shengping 1 ; Xie, Bingyan 1 ;
作者机构： 1.Chinese Acad Agr Sci, Inst Vegetables & Flowers, State Key Lab Vegetable Biobreeding, Beijing, Peoples R China
2.Wageningen Univ & Res, Plant Breeding, Wageningen, Netherlands
3.Wageningen Univ & Res, Grad Sch Expt Plant Sci, Wageningen, Netherlands
关键词： CRISPR; cucumber; Meloidogyne incognita; MLO; susceptibility genes; VIGS
期刊名称：MOLECULAR PLANT PATHOLOGY （ 影响因子：4.9； 五年影响因子：5.6 ）
ISSN： 1464-6722
年卷期： 2025 年 26 卷 4 期
页码：
收录情况： SCI
摘要： Cucumber production is seriously constrained by Meloidogyne incognita. Because no resistance resources to the pathogen have been reported, disabling susceptibility genes may represent a novel breeding strategy to introduce resistance against this nematode in cucumber. Here, we studied the clade V MLO genes for their involvement in the interaction between cucumber and M. incognita. Our results showed that Arabidopsis clade V MLO mutants were resistant to M. incognita. Cucumber has three clade V MLO genes, CsaMLO1, CsaMLO8 and CsaMLO11, with upregulated expression upon inoculation with M. incognita. Heterologous overexpression of CsaMLO1, CsaMLO8 and CsaMLO11 in Arabidopsis mutants restored susceptibility to varying degrees. Silencing and knockout of individual clade V MLO genes in cucumber reduced susceptibility to M. incognita. The cucumber CRISPR mutants produced similar fruits as the wild type (WT) did. Although the yields of two single mutants (M11(1) and M11(2)) and two double mutants (M8(1)M11(1) and M8(1)M11(2)) were reduced compared to WT, the yields of M8(1) and M8(2) were not decreased. In summary, clade V MLO genes function as susceptibility genes for M. incognita in cucumber. Among them, CsaMLO8 may be the most promising candidate for M. incognita resistance breeding in cucumber.
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