文献类型： 外文期刊
第一作者： Piao, Yinglan
作者： Piao, Yinglan;Zhao, Sisi;Wang, Haiping;Li, Shizhen;Chen, Yiduo;Piao, Zhongyun
作者机构：
期刊名称：HORTICULTURE RESEARCH （ 影响因子：8.7； 五年影响因子：9.0 ）
ISSN： 2662-6810
年卷期： 2024 年 11 卷 1 期
页码：
收录情况： SCI
摘要： Clubroot disease caused by Plasmodiophora brassicae (P. brassicae) severely threatens the cultivation of Cruciferous plants, especially Chinese cabbage. Recently, resistance genes in plants have been reported to encode for a Ca2+-permeable channel in the plasma membrane, which can mediate the cytosolic Ca2+ increase in plant cells upon pathogen attack. However, the downstream Ca2+ sensor and decoder are still unknown. In this study, we identified the virulent and avirulent P. brassicae isolates (Pbs) of two near isogenic lines, CR 3-2 and CS 3-2, with CR 3-2 harboring clubroot resistant gene BraCRa. The transcriptomic analysis was then conducted with CR 3-2 after inoculating with virulent isolate PbE and avirulent isolate Pb4. From the differentially expressed genes of transcriptomic data, we identified a Ca2+-sensor encoding gene, BraCBL1.2, that was highly induced in CR 3-2 during infection by Pb4 but not by PbE. Moreover, GUS histochemical staining and subcellular localization analysis revealed that BraCBL1.2 was specifically expressed in the root hair cells of Arabidopsis and encoded a putative Ca2+ sensor localized in the plasma membrane. We also developed an assay to investigate the BraCRa-mediated hypersensitive response (HR) in tobacco leaves. The results suggest that BraCBL1.2 is involved in the BraCRa-mediated plant ETI immune response against P. brassicae. In addition, we verified that overexpression of BraCBL1.2 enhanced clubroot resistance in Arabidopsis. Collectively, our data identified the involvement of a Ca2+ sensor in BraCRa-mediated clubroot resistance in Chinese cabbage, providing a theoretical basis for further research on the resistance of Chinese cabbage to P. brassicae.
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