His-Asp phosphorelay signaling: a communication avenue between plants and their environment
- Cite this article as:
- Sakakibara, H., Taniguchi, M. & Sugiyama, T. Plant Mol Biol (2000) 42: 273. doi:10.1023/A:1006334926388
- 144 Downloads
His-Asp phosphorelay systems have been recently discovered in plants and have emerged as some of the most important signaling systems. The phosphorelay systems in plants include components with sensor (His-protein kinase) domains, His-containing phosphotransfer (HPt) domains, and receiver (response regulator) domains. Recent studies implicate phosphorelay systems in sensing and propagating signals from a wide variety of external and/or internal stimuli such as ethylene, cytokinin, and osmolarity. In maize and Arabidopsis, some response regulators are up-regulated by both cytokinins and nitrate. These findings imply that the His-Asp phosphorelay may operate in an inorganic nitrogen-signaling pathway mediated by cytokinin in plants.