The Saclay Plant Sciences network gathers around 55 research teams specialized in plant sciences belonging to 5 institutes in the Paris area and represents more than 700 people. The current research activities of the SPS teams concern the genetic, molecular and cellular mechanisms that control plant physiology and development, as well as their interactions with fluctuating biotic or abiotic environments. These studies extend from the gene to the entire plant, and use the concepts and tools of biochemistry, biophysics, imaging, molecular biology, genetics, cell biology, modelling and bioinformatics.