Nitric oxide as a key component in hormone-regulated processes

SIMONTACCHI M; GARCÍA MATA, C; BARTOLI, CG; SANTA MARIA G.E.; LAMATINA, L

PLANT CELL REPORTS

SPRINGER

Lugar: Berlin; Año: 2013 vol. 32 p. 853 - 866

0721-7714

Nitric oxide (NO) is a small gaseous molecule,with a free radical nature that allows it to participate in awide spectrum of biologically important reactions. NO isan endogenous product in plants, where different biosyntheticpathways have been proposed. First known in animalsas a signaling molecule in cardiovascular and nervoussystems, it has turned up to be an essential component for awide variety of hormone-regulated processes in plants.Adaptation of plants to a changing environment involves apanoply of processes, which include the control of CO2fixation and water loss through stomatal closure, rearrangementsof root architecture as well as growth restriction.The regulation of these processes requires theconcerted action of several phytohormones, as well as theparticipation of the ubiquitous molecule NO. This reviewanalyzes the role of NO in relation to the signalingpathways involved in stomatal movement, plant growthand senescence, in the frame of its interaction with abscisicacid, auxins, gibberellins, and ethylene.