Extracellular ATP acts as a damage-associated molecular pattern (DAMP) signal in plants

As sessile organisms, plants have evolved effective mechanisms to protect themselves from environmental stresses. Damaged (i.e., wounded) plants recognize a variety of endogenous molecules as danger signals, referred to as damage-associated molecular patterns (DAMPs). ATP is among the molecules that...

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Published inFrontiers in plant science Vol. 5; p. 446
Main Authors Tanaka, Kiwamu, Choi, Jeongmin, Cao, Yangrong, Stacey, Gary
Format Journal Article
LanguageEnglish
Published Switzerland Frontiers Research Foundation 03.09.2014
Frontiers Media S.A
Subjects
BASIC BIOLOGICAL SCIENCES
DAMPs
ENVIRONMENTAL SCIENCES
extracellular ATP
immune defense
Plant Science
Plant Sciences
symbiosis and immunity
Wound Healing
wound healing
immune defense
symbiosis and immunity
DAMPs
extracellular ATP
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Summary:As sessile organisms, plants have evolved effective mechanisms to protect themselves from environmental stresses. Damaged (i.e., wounded) plants recognize a variety of endogenous molecules as danger signals, referred to as damage-associated molecular patterns (DAMPs). ATP is among the molecules that are released by cell damage, and recent evidence suggests that ATP can serve as a DAMP. Although little studied in plants, extracellular ATP is well known for its signaling roles in animals, including acting as a DAMP during the inflammatory response and wound healing. If ATP acts outside the cell, then it is reasonable to expect that it is recognized by a plasma membrane-localized receptor. Recently, DORN1, a lectin receptor kinase, was shown to recognize extracellular ATP in Arabidopsis. DORN1 is the founding member of a new purinoceptor subfamily, P2K (P2 receptor kinase), which is plant-specific. P2K1 (DORN1) is required for ATP-induced cellular responses (e.g., cytosolic Ca(2+) elevation, MAPK phosphorylation, and gene expression). Genetic analysis of loss-of-function mutants and overexpression lines showed that P2K1 participates in the plant wound response, consistent with the role of ATP as a DAMP. In this review, we summarize past research on the roles and mechanisms of extracellular ATP signaling in plants, and discuss the direction of future research on extracellular ATP as a DAMP signal.
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FG02-02ER15309
USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
This article was submitted to Plant-Microbe Interaction, a section of the journal Frontiers in Plant Science.
Edited by: Martin Heil, Centro de Investigación y de Estudios Avanzados del Instituto Población Nacional – Unidad Irapuato, Mexico
Reviewed by: Stanley Roux, The University of Texas at Austin, USA; Stephen Chivasa, Durham University, UK
ISSN:1664-462X
1664-462X
DOI:10.3389/fpls.2014.00446