The CIPK23 protein kinase represses SLAC1-type anion channels in Arabidopsis guard cells and stimulates stomatal opening

The CIPK23 protein kinase represses SLAC1-type anion channels in Arabidopsis guard cells and stimulates stomatal opening

© 2023 The Authors. New Phytologist © 2023 New Phytologist Foundation.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 238(2023), 1 vom: 23. Apr., Seite 270-282
1. Verfasser: Huang, Shouguang (VerfasserIn)
Weitere Verfasser: Maierhofer, Tobias, Hashimoto, Kenji, Xu, Xiangyu, Karimi, Sohail M, Müller, Heike, Geringer, Michael A, Wang, Yi, Kudla, Jörg, De Smet, Ive, Hedrich, Rainer, Geiger, Dietmar, Roelfsema, M Rob G
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Arabidopsis thaliana AKT1 CIPK23 K+ uptake channel SLAC1-type anion channel SLAH3 guard cells stomatal conductance mehr... Abscisic Acid 72S9A8J5GW Anions Arabidopsis Proteins CIPK23 protein, Arabidopsis EC 2.7.11.1 Membrane Proteins Protein Kinases EC 2.7.- Protein Serine-Threonine Kinases SLAC1 protein, Arabidopsis
Beschreibung
Zusammenfassung:© 2023 The Authors. New Phytologist © 2023 New Phytologist Foundation.
Guard cells control the opening of stomatal pores in the leaf surface, with the use of a network of protein kinases and phosphatases. Loss of function of the CBL-interacting protein kinase 23 (CIPK23) was previously shown to decrease the stomatal conductance, but the molecular mechanisms underlying this response still need to be clarified. CIPK23 was specifically expressed in Arabidopsis guard cells, using an estrogen-inducible system. Stomatal movements were linked to changes in ion channel activity, determined with double-barreled intracellular electrodes in guard cells and with the two-electrode voltage clamp technique in Xenopus oocytes. Expression of the phosphomimetic variant CIPK23T190D enhanced stomatal opening, while the natural CIPK23 and a kinase-inactive CIPK23K60N variant did not affect stomatal movements. Overexpression of CIPK23T190D repressed the activity of S-type anion channels, while their steady-state activity was unchanged by CIPK23 and CIPK23K60N . We suggest that CIPK23 enhances the stomatal conductance at favorable growth conditions, via the regulation of several ion transport proteins in guard cells. The inhibition of SLAC1-type anion channels is an important facet of this response
Beschreibung:Date Completed 07.03.2023
Date Revised 12.04.2023
published: Print-Electronic
Citation Status MEDLINE
ISSN:1469-8137
DOI:10.1111/nph.18708