The Arabidopsis Ca(2+) -dependent protein kinase CPK12 negatively regulates abscisic acid signaling in seed germination and post-germination growth

The Arabidopsis Ca(2+) -dependent protein kinase CPK12 negatively regulates abscisic acid signaling in seed germination and post-germination growth

© 2011 The Authors. New Phytologist © 2011 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 192(2011), 1 vom: 01. Okt., Seite 61-73
1. Verfasser: Zhao, Rui (VerfasserIn)
Weitere Verfasser: Sun, Hai-Li, Mei, Chao, Wang, Xiao-Jing, Yan, Lu, Liu, Rui, Zhang, Xiao-Feng, Wang, Xiao-Fang, Zhang, Da-Peng
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2011
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Arabidopsis Proteins RNA, Messenger Transcription Factors Abscisic Acid 72S9A8J5GW Protein Kinases EC 2.7.- calcium-dependent protein kinase mehr... EC 2.7.1.- CPK12 protein, Arabidopsis EC 2.7.11.17 Calcium-Calmodulin-Dependent Protein Kinases ABI2 protein, Arabidopsis EC 3.1.3.- Phosphoprotein Phosphatases EC 3.1.3.16
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245 1 4 |a The Arabidopsis Ca(2+) -dependent protein kinase CPK12 negatively regulates abscisic acid signaling in seed germination and post-germination growth 
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520 |a • Ca(2+) -dependent protein kinase (CDPK) is believed to be involved in abscisic acid (ABA) signaling, and several members of the Arabidopsis CDPK superfamily have been identified as positive ABA signaling regulators, but it remains unknown if CDPK negatively regulates ABA signaling. • Here, we investigated the function of an Arabidopsis (Arabidopsis thaliana) CDPK, CPK12, in ABA signaling pathway. • We generated Arabidopsis CPK12-RNAi lines, and observed that downregulation of CPK12 resulted in ABA hypersensitivity in seed germination and post-germination growth, and altered expression of a set of ABA-responsive genes. Expression assay showed that CPK12 was ubiquitously expressed and localized to both cytosol and nucleus. Biochemical assays showed that CPK12 interacted with, phosphorylated and stimulated a type 2C protein phosphatase ABI2, and phosphorylated two ABA-responsive transcription factors (ABF1 and ABF4) in vitro. • Our findings show that the Arabidopsis CPK12 is a negative ABA-signaling regulator in seed germination and post-germination growth, suggesting that different members of the CDPK family may constitute a regulation loop by functioning positively and negatively in ABA signal transduction 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
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650 7 |a Abscisic Acid  |2 NLM 
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650 7 |a Protein Kinases  |2 NLM 
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650 7 |a CPK12 protein, Arabidopsis  |2 NLM 
650 7 |a EC 2.7.11.17  |2 NLM 
650 7 |a Calcium-Calmodulin-Dependent Protein Kinases  |2 NLM 
650 7 |a EC 2.7.11.17  |2 NLM 
650 7 |a ABI2 protein, Arabidopsis  |2 NLM 
650 7 |a EC 3.1.3.-  |2 NLM 
650 7 |a Phosphoprotein Phosphatases  |2 NLM 
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700 1 |a Sun, Hai-Li  |e verfasserin  |4 aut 
700 1 |a Mei, Chao  |e verfasserin  |4 aut 
700 1 |a Wang, Xiao-Jing  |e verfasserin  |4 aut 
700 1 |a Yan, Lu  |e verfasserin  |4 aut 
700 1 |a Liu, Rui  |e verfasserin  |4 aut 
700 1 |a Zhang, Xiao-Feng  |e verfasserin  |4 aut 
700 1 |a Wang, Xiao-Fang  |e verfasserin  |4 aut 
700 1 |a Zhang, Da-Peng  |e verfasserin  |4 aut 
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