FSBSI ARRIAM
Federal State Budget Scientific Institution
All-Russia Research Institute for Agricultural Microbiology
All-Russia Research Institute for Agricultural Microbiology
- Visually impaired version
One of the directions of the laboratory's research is to study the role of hormones and transcription factors in controlling the development of legume nodules. It is known that under the influence of signaling molecules of Nod factors in the tissues of the root of leguminous plants, significant changes occur in the concentration of hormones cytokinins, auxins and gibberellins, which affects the infectious process and organogenesis of nodules. It remains a mystery how Nod factors, while remaining bound to receptors localized in the epidermis, transmit a signal to remote cells of the root cortex, where nodules are laid. Our studies have shown that under the influence of Nod factors, transcription factors of the KNOX and BELL families are activated in legumes, which stimulate genes that control cytokinin biosynthesis (Azarakhsh et al., 2015; Dolgikh et al., 2017; Dolgikh et al., 2020). In turn, under the influence of cytokinins in the tissues of the bark of the root of legumes, a local increase in the concentration of auxins occurs, which stimulates cell proliferation and leads to the formation of nodules. At the same time, cytokinins, as our studies show, have a significant effect on the later stages of symbiosis development associated with the processes of nodule tissue differentiation and bacteroid differentiation (Dolgikh et al., 2020).
