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The Arabidopsis pattern recognition receptor EFR enhances fire blight resistance in apple

Horticulture Research 2021年第1期8卷 2615-2623页

作者： Stefano Piazza Manuela Campa Valerio Pompili Lorenza Dalla Costa Umberto Salvagnin Vladimir Nekrasov cyril zipfel Mickael Malnoy Research and Innovation Centre Fondazione Edmund MachSan Michele a/AdigeItaly Genetics Department Faculty of AgriSciencesStellenbosch UniversityStellenboschSouth Africa The Sainsbury Laboratory University of East AngliaNorwichUnited Kingdom Institute of Plant and Microbial Biology and Zurich-Basel Plant Science Center University of ZurichZurichSwitzerland Present address:Plant Sciences Department Rothamsted ResearchHarpendenUK

Fire blight disease,caused by the bacterium Erwinia amylovora(***),is responsible for substantial losses in cultivated apples *** important mechanism of plant immunity is based on the recognition of conserved microbial molecules,named pathogen-associated or microbe-associated molecular patterns(PAMPs or MAMPs),through pattern recognition receptors(PRRs),leading to pattern-triggered immunity(PTI).The interspecies transfer of PRRs represents a promising strategy to engineer broad-spectrum and durable disease resistance in ***,the Arabidopsis thaliana PRR for the PAMP elf18 derived from the elongation factor thermal unstable(EF-Tu)proved to be effective in improving bacterial resistance when expressed into Solanaceae and other plant *** this study,we tested whether EFR can affect the interaction of apple with *** by its ectopic expression in the susceptible apple rootstock *** EFR expression led to the activation of PAMP-triggered immune response in apple leaves upon treatment with supernatant of ***,as measured by the production of reactive oxygen species and the induction of known defense *** amount of tissue necrosis associated with *** infection was significantly reduced in the EFR transgenic rootstock compared to the *** results show that the expression of EFR in apple rootstock may be a valuable biotechnology strategy to improve the resistance of apple to fire blight.

关键词： blight resistance pattern

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Vacuole Integrity Maintained by DUF300 Proteins Is Required for Brassinosteroid Signaling Regulation

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Molecular Plant 2018年第4期11卷 553-567页

作者： Qinsong Liu Thomas Vain Corrado Viotti Siamsa M, Doyle Danuse Tarkowska Ondrej Novak cyril zipfel Folke Sitbon Stephanie Robert Daniel Hofius Department of Plant Biology Uppsala BioCenter Swedish University of Agricultural Sciences (SLU) and Linnean Center for Plant Biology PO Box 7080 750 07 Uppsala Sweden Department of Forest Genetics and Plant Physiology Umea Plant Science Centre Swedish University of Agricultural Sciences (SLU) 90183 Umea Sweden Umea Plant Science Centre Umea University 90187 Umea Sweden Institute of Biochemistry and Biology Plant Physiology University of Potsdam 14476 Potsdam Germany Laboratory of Growth Regulators Centre of the Region Hana for Biotechnological and Agricultural Research institute of Experimental Botany ASCR and Palacky University 783 71 Olomouc Czech Republic The Sainsbury Laboratory Norwich Research Park Norwich NR4 7UH UK These authors contributed equally to this article. Present addresses: Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education) College of Life Science China West Normal University Nanchong 637009 Sichuan China Institut de Biologie Moleculaire des Plantes du CNRS IBMP-CNRS UPR2357 12 rue du General Zimmer 67084 Strasbourg France

Brassinosteroid （BR） hormone signaling controls multiple processes during plant growth and development and is initiated at the plasma membrane through the receptor kinase BRASSINOSTEROID INSENSITIVE1 （BRI1） together with co-receptors such as BRI1-ASSOClATED RECEPTOR KINASE1 （BAK1）. BRI1 abun- dance is regulated by endosomal recycling and vacuolar targeting, but the role of vacuole-related proteins in BR receptor dynamics and BR responses remains elusive. Here, we show that the absence of two DUF300 domain-containing tonoplast proteins, LAZARUS1 （LAZl） and LAZl HOMOLOG1 （LAZlH1）, causes vacuole morphology defects, growth inhibition, and constitutive activation of BR signaling. Intriguingly, tonoplast accumulation of BAK1 was substantially increased and appeared causally linked to enhanced BRI1 trafficking and degradation in lazl lazlhl plants. Since unrelated vacuole mutants exhibited normal BR responses, our findings indicate that DUF300 proteins play distinct roles in the regulation of BR signaling by maintaining vacuole integrity required to balance subcellular BAK1 pools and BR receptor distribution.

关键词： brassinosteroid signaling vacuole integrity DUF300 proteins tonoplast Arabidopsis

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