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
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520 |a 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 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Arabidopsis thaliana 
650 4 |a AKT1 
650 4 |a CIPK23 
650 4 |a K+ uptake channel 
650 4 |a SLAC1-type anion channel 
650 4 |a SLAH3 
650 4 |a guard cells 
650 4 |a stomatal conductance 
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650 7 |a 72S9A8J5GW  |2 NLM 
650 7 |a Anions  |2 NLM 
650 7 |a Arabidopsis Proteins  |2 NLM 
650 7 |a CIPK23 protein, Arabidopsis  |2 NLM 
650 7 |a EC 2.7.11.1  |2 NLM 
650 7 |a Membrane Proteins  |2 NLM 
650 7 |a Protein Kinases  |2 NLM 
650 7 |a EC 2.7.-  |2 NLM 
650 7 |a Protein Serine-Threonine Kinases  |2 NLM 
650 7 |a EC 2.7.11.1  |2 NLM 
650 7 |a SLAC1 protein, Arabidopsis  |2 NLM 
700 1 |a Maierhofer, Tobias  |e verfasserin  |4 aut 
700 1 |a Hashimoto, Kenji  |e verfasserin  |4 aut 
700 1 |a Xu, Xiangyu  |e verfasserin  |4 aut 
700 1 |a Karimi, Sohail M  |e verfasserin  |4 aut 
700 1 |a Müller, Heike  |e verfasserin  |4 aut 
700 1 |a Geringer, Michael A  |e verfasserin  |4 aut 
700 1 |a Wang, Yi  |e verfasserin  |4 aut 
700 1 |a Kudla, Jörg  |e verfasserin  |4 aut 
700 1 |a De Smet, Ive  |e verfasserin  |4 aut 
700 1 |a Hedrich, Rainer  |e verfasserin  |4 aut 
700 1 |a Geiger, Dietmar  |e verfasserin  |4 aut 
700 1 |a Roelfsema, M Rob G  |e verfasserin  |4 aut 
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