Osmotic stress activates nif and fix genes and induces the Rhizobium tropici CIAT 899 Nod factor production via NodD2 by up-regulation of the nodA2 operon and the nodA3 gene. - del Cerro, Pablo; Megías, Manuel; López-Baena, Francisco Javier; Gil-Serrano, Antonio; Pérez-Montaño, Francisco; Ollero, Francisco Javier (PLoS ONE, 2019)