Plant responses to extracellular nucleotides: Cellular processes and biological effects.

Purinergic Signalling
Collene R Jeter, S J Roux

Abstract

Higher plants exhibit cellular responsiveness to the exogenous application of purine nucleotides in a manner consistent with a cell-cell signaling function for these molecules. Like animals, plants respond to extracellular ATP, ADP, and stable analogues (e.g., ATPgammaS and ADPbetaS) by increasing the cytoplasmic concentration of calcium. Agonist substrate specificity and concentration dependency suggest receptor mediation of these events, and, although the identity of the plant receptor is currently unknown, pharmacological analysis points to the involvement of a plasma membrane-localized calcium channel. Extracellular ATP can also induce the production of reactive oxygen species and stimulate an increase in the mRNA levels of a number of stress- and calcium-regulated genes, suggesting a role for nucleotide-based signaling in plant wound and defense responses. Furthermore, the growth and development of plants can also be altered by the application of external ATP. Recent studies are only beginning to uncover the complexities of plant signaling networks activated in response to extracellular ATP and how these might interact to affect plant physiological processes.

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Citations

Feb 19, 2009·Acta Physiologica·G Burnstock, A Verkhratsky
Oct 12, 2007·Trends in Plant Science·Stanley J Roux, Iris Steinebrunner
Jan 12, 2016·The Journal of Eukaryotic Microbiology·Natalia MalloJosé-Manuel Leiro
Oct 15, 2008·Brazilian Journal of Medical and Biological Research = Revista Brasileira De Pesquisas Médicas E Biológicas·G Burnstock
Apr 11, 2012·International Journal of Molecular Sciences·Nur Diyana RoslanZamri Zainal
Nov 28, 2009·Molecular Biology Reports·Subramaniyam SathiyamoorthyDeok-Chun Yang

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