• The topophysical effect observed could not be explained solely by analyzing the endogenous isoprenoid and auxin. (uantwerpen.be)
  • Naturally occurring cytokinins are adenine derivatives with distinct substitutions attached to the N6position of the adenine ring ( Figure 1 ). (bioone.org)
  • Cytokinin groups a collection of N 6 -substituted adenine derivatives, including trans -zeatin ( t Z) and isopentenyladenine (iP). (nature.com)
  • To adopt this tool for mapping subcellular localization of cytokinin receptors, using docking experiments and cytokinin activity screening bioassays, we selected a fluorescently labelled bioactive compound that interacts with the binding site of a cytokinin receptor. (nature.com)
  • Subcellular localization of the receptors proposed the endoplasmic reticulum (ER) membrane as a principal cytokinin perception site, while study of cytokinin transport pointed to the plasma membrane (PM)-mediated cytokinin signalling. (nature.com)
  • Since their discovery, cytokinins have been implicated to play a role in almost all aspects of plant growth and development, including cell division, shoot initiation and growth, leaf senescence, and photomorphogenic development ( Mok and Mok, 1994 ). (bioone.org)
  • In addition to the free base forms, cytokinins can also be present in the plant as a riboside (in which a ribose sugar is attached to the 9 nitrogen of the purine ring) or a ribotide (in which the ribose moiety contains a phosphate group). (bioone.org)
  • Plant hormone cytokinins are perceived by a subfamily of sensor histidine kinases (HKs), which via a two-component phosphorelay cascade activate transcriptional responses in the nucleus. (nature.com)
  • The plant hormone cytokinin regulates various cell and developmental processes, including cell division and differentiation, embryogenesis, activity of shoot and root apical meristems, formation of shoot and root lateral organs and others 1 . (nature.com)
  • We provide a revised view on cytokinin signalling and the possibility of multiple sites of perception at PM and ER. (nature.com)
  • The topophysically dependent spatial distribution of endogenous cytokinins and auxins was determined. (uantwerpen.be)
  • The isoprenoid cytokinins ( t Z- or iP-types) showed similar distribution patterns in different cell type populations within the root apex 10 . (nature.com)
  • Here, by detailed monitoring of subcellular localizations of the fluorescently labelled natural cytokinin probe and the receptor ARABIDOPSIS HISTIDINE KINASE 4 (CRE1/AHK4) fused to GFP reporter, we show that pools of the ER-located cytokinin receptors can enter the secretory pathway and reach the PM in cells of the root apical meristem, and the cell plate of dividing meristematic cells. (nature.com)