A Plasmodesmata-Localized Protein Mediates Crosstalk between Cell-to-Cell Communication and Innate Immunity in<i>Arabidopsis</i>
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- Jung-Youn Lee
- Department of Plant and Soil Sciences, University of Delaware, Newark, Delaware 19711
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- Xu Wang
- Department of Plant and Soil Sciences, University of Delaware, Newark, Delaware 19711
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- Weier Cui
- Department of Plant and Soil Sciences, University of Delaware, Newark, Delaware 19711
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- Ross Sager
- Department of Plant and Soil Sciences, University of Delaware, Newark, Delaware 19711
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- Shannon Modla
- Delaware Biotechnology Institute, University of Delaware, Newark, Delaware 19711
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- Kirk Czymmek
- Delaware Biotechnology Institute, University of Delaware, Newark, Delaware 19711
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- Boris Zybaliov
- Department of Plant Biology, Cornell University, Ithaca, New York 14853
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- Klaas van Wijk
- Department of Plant Biology, Cornell University, Ithaca, New York 14853
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- Chong Zhang
- Department of Biological Sciences, University of Maryland, Baltimore, Maryland 21250
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- Hua Lu
- Department of Biological Sciences, University of Maryland, Baltimore, Maryland 21250
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- Venkatachalam Lakshmanan
- Department of Plant and Soil Sciences, University of Delaware, Newark, Delaware 19711
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説明
<jats:title>Abstract</jats:title><jats:p>Plasmodesmata (PD) are thought to play a fundamental role in almost every aspect of plant life, including normal growth, physiology, and developmental responses. However, how specific signaling pathways integrate PD-mediated cell-to-cell communication is not well understood. Here, we present experimental evidence showing that the Arabidopsis thaliana plasmodesmata-located protein 5 (PDLP5; also known as HOPW1-1-INDUCED GENE1) mediates crosstalk between PD regulation and salicylic acid–dependent defense responses. PDLP5 was found to localize at the central region of PD channels and associate with PD pit fields, acting as an inhibitor to PD trafficking, potentially through its capacity to modulate PD callose deposition. As a regulator of PD, PDLP5 was also essential for conferring enhanced innate immunity against bacterial pathogens in a salicylic acid–dependent manner. Based on these findings, a model is proposed illustrating that the regulation of PD closure mediated by PDLP5 constitutes a crucial part of coordinated control of cell-to-cell communication and defense signaling.</jats:p>
収録刊行物
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- The Plant Cell
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The Plant Cell 23 (9), 3353-3373, 2011-09-01
Oxford University Press (OUP)