Guan-Zhu Han1,2. 1. Jiangsu Key Laboratory for Microbes and Functional Genomics, College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu, 210023, China. 2. College of Life Sciences, Shandong Normal University, Jinan, Shandong, 250014, China.
Abstract
Contents Summary 70 I. Introduction 70 II. Ancient associations between plants and microbes 72 III. Evolutionary dynamics of plant-pathogen interactions 74 IV. Evolutionary signature of plant-pathogen interactions 74 V. Origin and evolution of RLK proteins 75 VI. Origin and evolution of NLR proteins 77 VII. Origin and evolution of SA signaling 78 VIII. Origin and evolution of RNA-based defense 79 IX. Perspectives 79 Acknowledgements 80 References 80 SUMMARY: Microbes have engaged in antagonistic associations with plants for hundreds of millions of years. Plants, in turn, have evolved diverse immune strategies to combat microbial pathogens. The conflicts between plants and pathogens result in everchanging coevolutionary cycles known as 'Red Queen' dynamics. These ancient and ongoing plant-pathogen interactions have shaped the evolution of both plant and pathogen genomes. With the recent explosion of plant genome-scale data, comparative analyses provide novel insights into the coevolutionary dynamics of plants and pathogens. Here, we discuss the ancient associations between plants and microbes as well as the evolutionary principles underlying plant-pathogen interactions. We synthesize and review the current knowledge on the origin and evolution of key components of the plant immune system. We also highlight the importance of studying algae and nonflowering land plants in understanding the evolution of the plant immune system.
Contents Summary 70 I. Introduction 70 II. Ancient associations between plants and microbes 72 III. Evolutionary dynamics of plant-pathogen interactions 74 IV. Evolutionary signature of plant-pathogen interactions 74 V. Origin and evolution of RLK proteins 75 VI. Origin and evolution of NLR proteins 77 VII. Origin and evolution of SA signaling 78 VIII. Origin and evolution of RNA-based defense 79 IX. Perspectives 79 Acknowledgements 80 References 80 SUMMARY: Microbes have engaged in antagonistic associations with plants for hundreds of millions of years. Plants, in turn, have evolved diverse immune strategies to combat microbial pathogens. The conflicts between plants and pathogens result in everchanging coevolutionary cycles known as 'Red Queen' dynamics. These ancient and ongoing plant-pathogen interactions have shaped the evolution of both plant and pathogen genomes. With the recent explosion of plant genome-scale data, comparative analyses provide novel insights into the coevolutionary dynamics of plants and pathogens. Here, we discuss the ancient associations between plants and microbes as well as the evolutionary principles underlying plant-pathogen interactions. We synthesize and review the current knowledge on the origin and evolution of key components of the plant immune system. We also highlight the importance of studying algae and nonflowering land plants in understanding the evolution of the plant immune system.
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