“…The fact that submicromolar levels of eATP can induce signaling changes in plants (Demidchik et al, 2003;Song et al, 2006) would suggest that plants, like animals, have purinoceptors that can bind eATP with a high affinity and transduce that binding into transduction pathways. However, as discussed by Demidchik et al (2003), Roux et al (2006), and others, as yet no purinoceptor has been identified in plants. Thus, in parallel with the history of auxin, gibberellin, and other growth regulators in plants, evidence that eATP can influence growth is preceding the discovery of how its growth influence is initiated, whether that be by a receptor or by some other mechanism.…”