Kieber Joseph J, Schaller G Eric
University of North Carolina, Biology Department, Chapel Hill, NC 27599-3280, USA
Dartmouth College, Department of Biological Sciences, Hanover, NH 03755, USA.
Development. 2018 Feb 27;145(4):dev149344. doi: 10.1242/dev.149344.
The phytohormone cytokinin plays diverse roles in plant development, influencing many agriculturally important processes, including growth, nutrient responses and the response to biotic and abiotic stresses. Cytokinin levels in plants are regulated by biosynthesis and inactivation pathways. Cytokinins are perceived by membrane-localized histidine-kinase receptors and are transduced through a His-Asp phosphorelay to activate a family of transcription factors in the nucleus. Here, and in the accompanying poster, we summarize the current understanding of cytokinin metabolism, transport and signaling, and discuss how this phytohormone regulates changes in gene expression to mediate its pleiotropic effects.
植物激素细胞分裂素在植物发育过程中发挥着多种作用，影响许多农业上重要的过程，包括生长、养分响应以及对生物和非生物胁迫的响应。植物中的细胞分裂素水平由生物合成和失活途径调节。细胞分裂素由膜定位的组氨酸激酶受体感知，并通过组氨酸-天冬氨酸磷酸传递进行信号转导，以激活细胞核中的一类转录因子。在此，以及在随附的海报中，我们总结了目前对细胞分裂素代谢、运输和信号传导的理解，并讨论了这种植物激素如何调节基因表达变化以介导其多效性作用。
