1. The nematode effector Mj-NEROSs interacts with Rieske's iron-sulfur protein influencing plastid ROS production to suppress plant immunity.
- Author
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Stojilković B, Xiang H, Chen Y, Maulana MI, Bauters L, Van de Put H, Steppe K, Liao J, de Almeida Engler J, and Gheysen G
- Subjects
- Animals, Arabidopsis parasitology, Arabidopsis immunology, Arabidopsis genetics, Arabidopsis Proteins metabolism, Arabidopsis Proteins genetics, Gene Expression Regulation, Plant, Mutation genetics, Plant Diseases parasitology, Plant Diseases immunology, Protein Binding, Tylenchoidea genetics, Tylenchoidea pathogenicity, Electron Transport Complex III genetics, Electron Transport Complex III metabolism, Helminth Proteins metabolism, Helminth Proteins genetics, Iron-Sulfur Proteins metabolism, Iron-Sulfur Proteins genetics, Plant Immunity, Plastids metabolism, Reactive Oxygen Species metabolism
- Abstract
Root-knot nematodes (RKN; Meloidogyne species) are plant pathogens that introduce several effectors in their hosts to facilitate infection. The actual targets and functioning mechanism of these effectors largely remain unexplored. This study illuminates the role and interplay of the Meloidogyne javanica nematode effector ROS suppressor (Mj-NEROSs) within the host plant environment. Mj-NEROSs suppresses INF1-induced cell death as well as flg22-induced callose deposition and reactive oxygen species (ROS) production. A transcriptome analysis highlighted the downregulation of ROS-related genes upon Mj-NEROSs expression. NEROSs interacts with the plant Rieske's iron-sulfur protein (ISP) as shown by yeast-two-hybrid and bimolecular fluorescence complementation. Secreted from the subventral pharyngeal glands into giant cells, Mj-NEROSs localizes in the plastids where it interacts with ISP, subsequently altering electron transport rates and ROS production. Moreover, our results demonstrate that isp Arabidopsis thaliana mutants exhibit increased susceptibility to M. javanica, indicating ISP importance for plant immunity. The interaction of a nematode effector with a plastid protein highlights the possible role of root plastids in plant defense, prompting many questions on the details of this process., (© 2024 The Authors New Phytologist © 2024 New Phytologist Foundation.)
- Published
- 2024
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