title: Enhancement of MAMP signaling by chimeric receptors improves disease resistance in plants.
abstract: Plants activate defense responses through the recognition of microbe-associated molecular patterns (MAMPs). Recently, several pattern-recognition receptors (PRRs) have been identified in plants, paving the way for manipulating MAMP signaling. CEBiP is a receptor for the chitin elicitor (CE) identified in the rice plasma membrane and XA21 is a member of the receptor-like protein kinase (RLK) family that confers disease resistance to rice bacterial leaf blight expressing the sulfated protein Ax21. To improve resistance to rice blast, the most serious fungal disease of rice, we aimed to create a defense system that combines high affinity of CEBiP for CE and the ability of XA21 to confer disease resistance. Cultured rice cells expressing the chimeric receptor CRXA, which consists of CEBiP and the intracellular region of XA21, induced cell death accompanied by an increased production of reactive oxygen and nitrogen species after exposure to CE. Rice plants expressing the chimeric receptor exhibited more resistance to rice blast. Engineering PRRs may be a new strategy in molecular breeding for achieving disease resistance.
authors.affiliation: National Institute of Agrobiological Sciences, Division of Plant Sciences, Ibaraki, Japan.
authors.forename: Kyutaro
authors.initials: K
authors.lastname: Kishimoto
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Kouzai
authors.forename: Hanae
authors.initials: H
authors.lastname: Kaku
authors.forename: Naoto
authors.initials: N
authors.lastname: Shibuya
authors.forename: Eiichi
authors.initials: E
authors.lastname: Minami
authors.forename: Yoko
authors.initials: Y
authors.lastname: Nishizawa
mesh_terms: D017360:Arabidopsis / Q000235:genetics / Q000378:metabolism; D018506:Gene Expression Regulation, Plant; D007113:Immunity, Innate / Q000235:genetics / Q000502:physiology*; D008954:Models, Biological; D012275:Oryza / Q000235:genetics / Q000378:metabolism / Q000382:microbiology; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism*; D010944:Plants / Q000235:genetics / Q000378:metabolism* / Q000382:microbiology; D030821:Plants, Genetically Modified / Q000235:genetics / Q000378:metabolism*; D015398:Signal Transduction / Q000235:genetics / Q000502:physiology
chemical_list: D010940:Plant Proteins