VmSpm1:一种来自苹果树的分泌蛋白,以苹果的脱落酸受体 MdPYL4 为靶标,抑制茉莉酸信号传导,增强感染能力

IF 8.3 1区 生物学 Q1 PLANT SCIENCES New Phytologist Pub Date : 2024-10-17 DOI:10.1111/nph.20194
Yangguang Meng, Yingzhu Xiao, Shan Zhu, Liangsheng Xu, Lili Huang
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引用次数: 0

摘要

致病真菌(如苹果蠹蛾)会分泌效应蛋白来操纵宿主防御系统并促进感染。亚丝氨酸酶被认为是潜在的毒力因子,但它们在果树病原体(如影响苹果树的病原体)中的具体作用却鲜为人知。通过使用 Y2H、BiFC、SLC 和 Co-IP 技术,我们证明了 VmSpm1 和 MdPYL4 之间的相互作用。我们利用 Y2H、BiFC、SLC 和 Co-IP 技术证明了 VmSpm1 与 MdPYL4 之间的相互作用。稳定的转基因苹果品系接种实验表明,当 MdPYL4 在苹果中过表达时,其对苹果瓦尔萨腐烂病的抗性增强。此外,通过体外和体内试验,我们还发现了 VmSpm1 对 MdPYL4 的降解作用。MdPYL4以依赖脱落酸的方式促进苹果中茉莉酸(JA)的合成。总之,本研究揭示了苹果蠹蛾如何利用 VmSpm1 破坏 JA 信号转导,从而揭示了真菌如何操纵植物激素破坏免疫力。
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VmSpm1: a secretory protein from Valsa mali that targets apple's abscisic acid receptor MdPYL4 to suppress jasmonic acid signaling and enhance infection

  • Pathogenic fungi such as Valsa mali secrete effector proteins to manipulate host defenses and facilitate infection. Subtilases are identified as potential virulence factors, yet their specific roles in fruit tree pathogens, such as those affecting apple trees, are poorly understood.
  • Our research shows VmSpm1 as a virulence factor in V. mali. Knocking it out decreased virulence, whereas its heterologous expression in apple led to reduced disease resistance.
  • Using Y2H, BiFC, SLC, and Co-IP techniques, we demonstrated an interaction between VmSpm1 and MdPYL4. MdPYL4 levels increased during V. mali infection. The stable transgenic apple lines inoculation experiment showed that MdPYL4 correlates with enhanced resistance to Apple Valsa canker when overexpressed in apples. Furthermore, through in vitro and in vivo assays, we showed the degradative role of VmSpm1 on MdPYL4. MdPYL4 promotes the synthesis of jasmonic acid (JA) in apples in an abscisic acid-dependent manner. The degradation of MdPYL4 leads to a reduction in JA content in apples during V. mali infection, thereby impairing JA signal transduction and decreasing disease resistance in apple plants.
  • In summary, this study reveals how V. mali utilizes VmSpm1 to subvert JA signaling, shedding light on fungal manipulation of plant hormones to disrupt immunity.

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来源期刊
New Phytologist
New Phytologist 生物-植物科学
自引率
5.30%
发文量
728
期刊介绍: New Phytologist is an international electronic journal published 24 times a year. It is owned by the New Phytologist Foundation, a non-profit-making charitable organization dedicated to promoting plant science. The journal publishes excellent, novel, rigorous, and timely research and scholarship in plant science and its applications. The articles cover topics in five sections: Physiology & Development, Environment, Interaction, Evolution, and Transformative Plant Biotechnology. These sections encompass intracellular processes, global environmental change, and encourage cross-disciplinary approaches. The journal recognizes the use of techniques from molecular and cell biology, functional genomics, modeling, and system-based approaches in plant science. Abstracting and Indexing Information for New Phytologist includes Academic Search, AgBiotech News & Information, Agroforestry Abstracts, Biochemistry & Biophysics Citation Index, Botanical Pesticides, CAB Abstracts®, Environment Index, Global Health, and Plant Breeding Abstracts, and others.
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