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CCA1 and LHY contribute to nonhost resistance to Pyricularia oryzae (syn. Magnaporthe oryzae) in Arabidopsis thaliana.
Bioscience, Biotechnology, and Biochemistry ( IF 1.6 ) Pub Date : 2019-09-03 , DOI: 10.1080/09168451.2019.1660612
Saaya Yamaura 1 , Yuri Yamauchi 1 , Motoi Makihara 1 , Takafumi Yamashino 2 , Atsushi Ishikawa 1
Affiliation  

The circadian clock enables plants to adapt to their environment and control numerous physiological processes, including plant-pathogen interactions. However, it is unknown if the circadian clock controls nonhost resistance (NHR) in plants. To find out, we analyzed microarray data with the web-based tool DIURNAL to reveal that NHR-related genes show rhythmic expression patterns in the absence of a pathogen challenge. Our clock mutant analyses found that cca1-1 lhy-11 double mutant showed compromised NHR to Pyricularia oryzae, suggesting that two components of the circadian clock, CCA1 and LHY, are involved in regulating penetration resistance in Arabidopsis thaliana. By analyzing pen2 double mutants, we revealed that CCA1 contributes to time-of-day-dependent penetration resistance as a positive regulator and that LHY regulates post-penetration resistance as a positive regulator. Taken together, our results suggest that the circadian clock regulates the time-of-day-dependent NHR to P. oryzae and thus enables A. thaliana to counteract pathogen attacks.Abbreviations: EE: evening element; ETI: effector-triggered immunity; NHR: nonhost resistance; PAMP: pathogen-associated molecular pattern; PTI: PAMP-triggered immunity; SAR: systemic acquired resistance.

中文翻译:

CCA1和LHY有助于拟南芥对稻瘟病菌(稻瘟病菌)的非寄主抗性。

昼夜节律时钟使植物能够适应其环境并控制众多生理过程,包括植物与病原体的相互作用。然而,尚不清楚生物钟是否控制植物的非寄主抗性(NHR)。为了找出答案,我们使用基于Web的工具DIURNAL分析了微阵列数据,以揭示NHR相关基因在没有病原体攻击的情况下显示出节律性表达模式。我们的时钟突变体分析发现,cca1-1 lhy-11双突变体显示NHR受到稻瘟病菌的侵害,表明昼夜节律时钟的两个成分CCA1和LHY参与调节拟南芥中的抗渗透性。通过分析pen2双突变体,我们发现,CCA1作为正向调节剂对一天中依赖时间的渗透阻力有贡献,而LHY作为正向调节剂则对渗透后阻力具有调节作用。综上所述,我们的结果表明昼夜节律调节了稻米假单胞菌依赖于时间的NHR,从而使拟南芥能够抵抗病原体的侵袭。ETI:效应触发的免疫;NHR:非宿主抵抗;PAMP:病原体相关分子模式;PTI:PAMP触发的免疫力;SAR:全身获得性抵抗。非宿主抗性 PAMP:病原体相关分子模式;PTI:PAMP触发的免疫力;SAR:全身获得性抵抗。非宿主抗性 PAMP:病原体相关分子模式;PTI:PAMP触发的免疫力;SAR:全身获得性抵抗。
更新日期:2019-12-04
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