1. Little information is available concerning the mechanisms leading to nodulation . 2. The flowers are classically root nodulation is very common. 3. Predicting gene regulatory networks of soybean nodulation from RNA-Seq transcriptome data. 4. These may well constitute the evolutionary precursors in legumes for nitrogen fixation through nodulation . 5. Autoregulation of nodulation controls nodule numbers per plant through a systemic process involving the leaf. 6. Several different pathways have been implicated as donating duplicated genes to the pathways need for nodulation . 7. These traits include enhanced competitive nodulation , nodule development, intracellular infection, and bacteroid persistence. 8. As in legumes, nodulation is favored by nitrogen deprivation and is inhibited by high nitrogen concentrations. 9. Nodulation is rare in this subfamily, and where it does occur, nodules have a primitive structure.10. Regulation of nodule meristems utilizes long distance regulation commonly called " Autoregulation of Nodulation " ( AON ).