Extracellular ATP Induces Nitric Oxide Production in Tomato Cell Suspensions

NOELIA P. FORESI; ANA M. LAXALT; CLAUDIA V. TONON; CLAUDIA A. CASALONGUE; CLAUDIA A. CASALONGUE; LORENZO LAMATTINA

PLANT PHYSIOLOGY.

AMER SOC PLANT BIOLOGISTS

Año: 2007 vol. 145 p. 589 - 592

0032-0889

In plant as well as in animal systems, extracellular ATP (eATP)regulates a broad range of physiological processes. In animals,downstream signaling events regulated by eATP have been described. Among the second messengers reported to be involved in eATP signaling, there are inositol phosphates,Ca, cAMP, and nitric oxide NO; Abbracchio and Burnstock, 1998; Shen et al., 2005), but in plants this study is in its infancy. It hasbeen shown that Ca and superoxide are required for ATP-induced responses (Demidchik et al., 2003; Song et al., 2006). Here,we report that exogenous ATP induces NO production in plant cells via P2-like receptors accordingly to what has been revealed in animals (Shen et al., 2005, 2006). Even though the data are consistent with the presence of P2-like receptors in plants,they have not been identified yet. Thus, our results suggest that eATP-mediated production of NO is present in different biological systems.