Two spatially and temporally distinct Ca2+ signals convey Arabidopsis thaliana responses to K+ deficiency

Two spatially and temporally distinct Ca2+ signals convey Arabidopsis thaliana responses to K+ deficiency

© 2016 The Authors. New Phytologist © 2016 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 213(2017), 2 vom: 16. Jan., Seite 739-750
1. Verfasser: Behera, Smrutisanjita (VerfasserIn)
Weitere Verfasser: Long, Yu, Schmitz-Thom, Ina, Wang, Xue-Ping, Zhang, Chunxia, Li, Hong, Steinhorst, Leonie, Manishankar, Prabha, Ren, Xiao-Ling, Offenborn, Jan Niklas, Wu, Wei-Hua, Kudla, Jörg, Wang, Yi
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2017
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Arabidopsis thaliana K+ channel calcium cameleon YC3.6 high-resolution calcium imaging nutrient starvation potassium signaling Arabidopsis Proteins mehr... lanthanum chloride 04M8624OXV Lanthanum 6I3K30563S Potassium RWP5GA015D Calcium SY7Q814VUP
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520 |a In plants, potassium (K+ ) homeostasis is tightly regulated and established against a concentration gradient to the environment. Despite the identification of Ca2+ -regulated kinases as modulators of K+ channels, the immediate signaling and adaptation mechanisms of plants to low-K+ conditions are only partially understood. To assess the occurrence and role of Ca2+ signals in Arabidopsis thaliana roots, we employed ratiometric analyses of Ca2+ dynamics in plants expressing the Ca2+ reporter YC3.6 in combination with patch-clamp analyses of root cells and two-electrode voltage clamp (TEVC) analyses in Xenopus laevis oocytes. K+ deficiency triggers two successive and distinct Ca2+ signals in roots exhibiting spatial and temporal specificity. A transient primary Ca2+ signature arose within 1 min in the postmeristematic stelar tissue of the elongation zone, while a secondary Ca2+ response occurred after several hours as sustained Ca2+ elevation in defined tissues of the elongation and root hair differentiation zones. Patch-clamp and TEVC analyses revealed Ca2+ dependence of the activation of the K+ channel AKT1 by the CBL1-CIPK23 Ca2+ sensor-kinase complex. Together, these findings identify a critical role of cell group-specific Ca2+ signaling in low K+ responses and indicate an essential and direct role of Ca2+ signals for AKT1 K+ channel activation in roots 
650 4 |a Journal Article 
650 4 |a Arabidopsis thaliana 
650 4 |a K+ channel 
650 4 |a calcium 
650 4 |a cameleon YC3.6 
650 4 |a high-resolution calcium imaging 
650 4 |a nutrient starvation 
650 4 |a potassium 
650 4 |a signaling 
650 7 |a Arabidopsis Proteins  |2 NLM 
650 7 |a lanthanum chloride  |2 NLM 
650 7 |a 04M8624OXV  |2 NLM 
650 7 |a Lanthanum  |2 NLM 
650 7 |a 6I3K30563S  |2 NLM 
650 7 |a Potassium  |2 NLM 
650 7 |a RWP5GA015D  |2 NLM 
650 7 |a Calcium  |2 NLM 
650 7 |a SY7Q814VUP  |2 NLM 
700 1 |a Long, Yu  |e verfasserin  |4 aut 
700 1 |a Schmitz-Thom, Ina  |e verfasserin  |4 aut 
700 1 |a Wang, Xue-Ping  |e verfasserin  |4 aut 
700 1 |a Zhang, Chunxia  |e verfasserin  |4 aut 
700 1 |a Li, Hong  |e verfasserin  |4 aut 
700 1 |a Steinhorst, Leonie  |e verfasserin  |4 aut 
700 1 |a Manishankar, Prabha  |e verfasserin  |4 aut 
700 1 |a Ren, Xiao-Ling  |e verfasserin  |4 aut 
700 1 |a Offenborn, Jan Niklas  |e verfasserin  |4 aut 
700 1 |a Wu, Wei-Hua  |e verfasserin  |4 aut 
700 1 |a Kudla, Jörg  |e verfasserin  |4 aut 
700 1 |a Wang, Yi  |e verfasserin  |4 aut 
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773 1 8 |g volume:213  |g year:2017  |g number:2  |g day:16  |g month:01  |g pages:739-750 
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