ArticlePlanta2012
Isolation and characterization of a novel ammonium overly sensitive mutant, amos2, in Arabidopsis thaliana.
Article in Planta, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.
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Who cites it
15 citing papers in PubMed.
- A population genomics analysis of the Aotearoa New Zealand endemic rewarewa tree (Knightia excelsa).npj biodiversity · 2024Article
- Melatonin mitigates root growth inhibition and carbon-nitrogen metabolism imbalance in apple rootstock M9T337 under high nitrogen stress.Frontiers in plant science · 2024Article
- Nitrate nitrogen enhances the efficiency of photoprotection inFrontiers in plant science · 2024Article
- Improved lipid production and component of mycosporine-like amino acids by co-overexpression of amt1 and aroB genes in Synechocystis sp. PCC6803.Scientific reports · 2023Article
- TheBiology · 2022Article
- Article
- Providing carbon skeletons to sustain amide synthesis in roots underlines the suitability ofAoB PLANTS · 2019Article
- High ammonium supply impairs photosynthetic efficiency in rice exposed to excess light.Photosynthesis research · 2019Article
- The Arabidopsis AMOT1/EIN3 gene plays an important role in the amelioration of ammonium toxicity.Journal of experimental botany · 2019Article
- Ammonium Nitrogen TolerantFrontiers in microbiology · 2018Article
- The Kinase CIPK23 Inhibits Ammonium Transport inThe Plant cell · 2017Article
- Cytosolic Glutamine Synthetase Gln1;2 Is the Main Isozyme Contributing to GS1 Activity and Can Be Up-Regulated to Relieve Ammonium Toxicity.Plant physiology · 2016Article
- Mild ammonium stress increases chlorophyll content in Arabidopsis thaliana.Plant signaling & behavior · 2015Article
- Ecological significance and complexity of N-source preference in plants.Annals of botany · 2013Article
- Arabidopsis plastid AMOS1/EGY1 integrates abscisic acid signaling to regulate global gene expression response to ammonium stress.Plant physiology · 2012Article
Corrections and comments
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Ammonium (NH(4)(+)) toxicity is a significant agricultural problem globally, compromising crop growth and productivity in many areas. However, the molecular mechanisms of NH(4)(+) toxicity are still poorly understood, in part due to a lack of valuable genetic resources. Here, a novel Arabidopsis mutant, amos2 (ammonium overly sensitive 2), displaying hypersensitivity to NH(4) (+) in both shoots and roots, was isolated. The mutant exhibits the hallmarks of NH(4)(+) toxicity at significantly elevated levels: severely suppressed shoot biomass, increased leaf chlorosis, and inhibition of lateral root formation. Amos2 hypersensitivity is associated with excessive NH(4)(+) accumulation in shoots and a reduction in tissue potassium (K(+)), calcium (Ca(2+)), and magnesium (Mg(2+)). We show that the lesion is specific to the NH(4)(+) ion, is independent of NH(4)(+) metabolism, and can be partially rescued by elevated external K(+). The amos2 lesion was mapped to a 16-cM interval on top of chromosome 1, where no similar mutation has been previously mapped. Our study identifies a novel locus controlling cation homeostasis under NH(4)(+) stress and provides a tool for the future identification of critical genes involved in the development of NH(4)(+) toxicity.
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Registered trials
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