Extracellular ATP Induces the Accumulation of Superoxide via NADPH Oxidases in Arabidopsis1 From: Plant Physiology | Date: April 1, 2006| Author: Song, Charlotte J; Steinebrunner, Iris; Wang, Xuanzhi; Stout, Stephen C; Roux, Stanley J | Copyright American Society of Plant Physiologists Apr 2006. Provided by ProQuest LLC.Copyright information

Extracellular ATP can serve as a signaling agent in animal cells, and, as suggested by recent reports, may also do so in plant cells. In animal cells it induces the production of reactive oxygen species through the mediation of NADPH oxidase. Similarly, here we report that in leaves of Arabidopsis (Arabidopsis thaliana), applied ATP, but not AMP or phosphate, induces the accumulation of superoxide (O2^sup -^) in a biphasic, dose-dependent manner, with a threshold at 500 nM ATP. This effect di...