scholarly journals Suppression of External NADPH Dehydrogenase—NDB1 in Arabidopsis thaliana Confers Improved Tolerance to Ammonium Toxicity via Efficient Glutathione/Redox Metabolism

2018 ◽  
Vol 19 (5) ◽  
pp. 1412 ◽  
Author(s):  
Anna Podgórska ◽  
Monika Ostaszewska-Bugajska ◽  
Klaudia Borysiuk ◽  
Agata Tarnowska ◽  
Monika Jakubiak ◽  
...  
2012 ◽  
Vol 53 (3) ◽  
pp. 577-591 ◽  
Author(s):  
Takushi Hachiya ◽  
Chihiro K. Watanabe ◽  
Masaru Fujimoto ◽  
Toshiki Ishikawa ◽  
Kentaro Takahara ◽  
...  

2019 ◽  
Vol 237 ◽  
pp. 87-94 ◽  
Author(s):  
Slavica Dmitrović ◽  
Milan Dragićević ◽  
Jelena Savić ◽  
Milica Milutinović ◽  
Suzana Živković ◽  
...  

2014 ◽  
Vol 7 (2) ◽  
pp. 356-368 ◽  
Author(s):  
Sabá V. Wallström ◽  
Igor Florez-Sarasa ◽  
Wagner L. Araújo ◽  
Mari Aidemark ◽  
María Fernández-Fernández ◽  
...  

2021 ◽  
Author(s):  
Pascal Ganz ◽  
Romano Porras-Murillo ◽  
Toyosi Ijato ◽  
Jochen Menz ◽  
Tatsiana Straub ◽  
...  

SummaryAmmonium uptake at plant roots is regulated at the transcriptional, post-transcriptional and post-translational levels. Phosphorylation by the protein kinase CIPK23 transiently inactivates the ammonium transporters (AMT1s) but the phosphatases activating AMT1s remain unknown. Here, we have identified the PP2C phosphatase ABI1 as an activator of AMTs in Arabidopsis thaliana. We show that high external ammonium concentrations elevate the stress phytohormone abscisic acid (ABA) by de-glycosylation. Active ABA is sensed by ABI1-PYL complexes followed by the inactivation of ABI1 activating CIPK23. Under favourable growth conditions, ABI1 reduces AMT1 phosphorylation, both by binding and inactivating CIPK23, and by the direct dephosphorylation of AMT1s. Thus, ABI1 is a positive regulator of ammonium uptake, coupling nutrient acquisition to abiotic stress signalling. Elevated ABA reduces ammonium uptake during stress situations, such as ammonium toxicity, whereas ABI1 reactivates AMT1s under favourable growth conditions.


1994 ◽  
Vol 5 (4) ◽  
pp. 551-558 ◽  
Author(s):  
Seok So Chang ◽  
Soon Ki Park ◽  
Byung Chul Kim ◽  
Bong Joong Kang ◽  
Dal Ung Kim ◽  
...  

1995 ◽  
Vol 95 (2) ◽  
pp. 260-266 ◽  
Author(s):  
Maarten Koornneef ◽  
Corrie Hanhart ◽  
Patty van Loenen-Martinet ◽  
Hetty Blankestijn de Vries

1992 ◽  
Vol 84 (4) ◽  
pp. 561-567 ◽  
Author(s):  
Poul E. Jensen ◽  
Michael Kristensen ◽  
Tine Hoff ◽  
Jan Lehmbeck ◽  
Bjarne M. Stummann ◽  
...  

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