Nitric oxide and plant growth promoting rhizobacteria: common features influencing root growth and development

MOLINA FAVERO CELESTE; CREUS CECILIA MÓNICA; LANTERI MARÍA LUCIANA; CORREA ARAGUNDE NATALIA; LOMBARDO MARÍA CRISTINA; BARASSI CARLOS ALBERTO; LAMATTINA LORENZO

ADVANCES IN BOTANICAL RESEARCH

Elsevier

Año: 2007 vol. 47 p. 1 - 33

0065-2296

Nitric oxide (NO) is a gas produced by prokaryotes and eukaryotes as part of their N metabolism that profoundly influences the physiology of the cells. In plants, the biological implications of NO as a signal molecule modulating physiological responses have been elucidated in the last decade. The NO action as an intermediary in auxin regulated signaling cascades influencing root growth and developmental processes is probably one of the most important functions in plant biology. Here we describe the signaling pathways and the cellular messengers involved in the NO induction of adventitious root formation, lateral root development, and root hair formation. We also review the first evidence supporting the NO role in the induction of adventitious and lateral root development by plant growth promoting rhizobacteria (PGPR). Finally, it is presented and discussed as an overview of the putative and potential biosynthetic pathways of NO and their close dependence on the different N sources in PGPR.