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Comparative analyses of RNA-seq and phytohormone data of sweetpotatoes inoculated with Dickeya dadantii causing bacterial stem and root rot of sweetpotato

文献类型： 外文期刊

作者： Xie, Shu-Yan 1 ; Fang, Boping 1 ; Chen, Jingyi 1 ; Zhao, Nan 1 ; Lin, Shuyun 1 ; Ma, Tingting 1 ; Huang, Lifei 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Crops Res Inst, Guangzhou 510640, Peoples R China

2.Key Lab Crops Genet & Improvement Guangdong Prov, Guangzhou 510640, Peoples R China

3.Zhongkai Univ Agr & Engn, Coll Agr & Biol, Guangzhou 510000, Peoples R China

4.South China Agr Univ, Coll Plant Protect, Guangzhou 510642, Peoples R China

5.Guangdong Acad Agr Sci, Vegetable Res Inst, Guangzhou 510640, Peoples R China

6.Guangdong Key Lab New Technol Res Vegetables, Guangzhou 510640, Peoples R China

关键词： Sweetpotato; Dickeya dadantii; RNA sequencing; Phytohormone; Reactive oxygen species; Superoxide dismutase

期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.8； 五年影响因子：5.4 ）

ISSN： 1471-2229

年卷期： 2024 年 24 卷 1 期

页码：

收录情况： SCI

摘要： Bacterial stem and root rot (BSRR) in sweetpotato caused by Dickeya dadantii is one of the ten major diseases of sweetpotatoes in China. However, the molecular mechanism underlying the resistance of sweetpotato to D. dadantii remains unclear. This study adopted a resistance identification assay that conformed Guangshu87 (GS87) as BSRR-resistant and Xinxiang (XX) as susceptible. Compared to XX, GS87 effectively prevented the invasion and dissemination of D. dadantii in planta. An RNA sequencing (RNA-seq) analysis identified 54,844 expressed unigenes between GS87 and XX at four different stages. Further, it revealed that GS87 was more able to regulate the expressions of more unigenes after the inoculation with D. dadantii, including resistance (R) and transcription factors (TF) genes. Moreover, content measurements of disease resistance-related phytohormones showed that both jasmonic acids (JAs) and salicylic acids (SAs) accumulated in D. dadantii-inoculated sweetpotatoes, and JAs may negatively regulate sweetpotato resistance against D. dadantii and accumulated faster than SAs. Meanwhile, determinations of ROS production rate and relevant enzymatic/non-enzymatic activity highlighted the vital roles of reactive oxygen species (ROS) and superoxide dismutase (SOD) in confering GS87 resistance against D. dadantii. Additionally, several hub genes with high connectivity were highlighted through Protein-Protein interaction (PPI) network analysis. In summary, the findings in this study contribute to the understanding of the different responses of resistant and susceptible sweetpotato cultivars to D. dadantii infection, and it also provide the first insight into the relevant candidate genes and phytohormones involved in the resistance of sweetpotato to D. dadantii.

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