Abstract:
: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. 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. 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. Brefeldin A (BFA) experiments revealed vesicular recycling of the receptor and its accumulation in BFA compartments. We provide a revised view on cytokinin signalling and the possibility of multiple sites of perception at PM and ER.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Kubiasová K,Montesinos JC,Šamajová O,Nisler J,Mik V,Semerádová H,Plíhalová L,Novák O,Marhavý P,Cavallari N,Zalabák D,Berka K,Doležal K,Galuszka P,Šamaj J,Strnad M,Benková E,Plíhal O,Spíchal Ldoi
10.1038/s41467-020-17949-0subject
Has Abstractpub_date
2020-08-27 00:00:00pages
4285issue
1issn
2041-1723pii
10.1038/s41467-020-17949-0journal_volume
11pub_type
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