ArticlePlant physiology1993
Ammonium Uptake by Rice Roots (I. Fluxes and Subcellular Distribution of 13NH4+).
Article in Plant physiology, 1993. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers, 1 of them a synthesis that pooled it.
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Who cites it
37 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Plant ammonium sensitivity is associated with external pH adaptation, repertoire of nitrogen transporters, and nitrogen requirement.Journal of experimental botany · 2024Pooled it
- Genome-wide association study using specific-locus amplified fragment sequencing identifies new genes influencing nitrogen use efficiency in rice landraces.Frontiers in plant science · 2023Article
- The rice transcription factor Nhd1 regulates root growth and nitrogen uptake by activating nitrogen transporters.Plant physiology · 2022Article
- The nitrate transporter OsNPF7.9 mediates nitrate allocation and the divergent nitrate use efficiency between indica and japonica rice.Plant physiology · 2022Article
- High ammonium supply impairs photosynthetic efficiency in rice exposed to excess light.Photosynthesis research · 2019Article
- Adaptive Regulation of Nitrate Transceptor NRT1.1 in Fluctuating Soil Nitrate Conditions.iScience · 2018Article
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- Revisiting the chlorophyll biosynthesis pathway using genome scale metabolic model of Oryza sativa japonica.Scientific reports · 2015Article
- A Receptor-Like Kinase Mediates Ammonium Homeostasis and Is Important for the Polar Growth of Root Hairs in Arabidopsis.The Plant cell · 2014Article
- Rapid ammonia gas transport accounts for futile transmembrane cycling under NH3/NH4+ toxicity in plant roots.Plant physiology · 2013Article
- Ecological significance and complexity of N-source preference in plants.Annals of botany · 2013Article
- Nitrate signals determine the sensing of nitrogen through differential expression of genes involved in nitrogen uptake and assimilation in finger millet.Functional & integrative genomics · 2013Article
- Approaches towards nitrogen- and phosphorus-efficient rice.AoB PLANTS · 2012Article
- Plant delta 15N correlates with the transpiration efficiency of nitrogen acquisition in tropical trees.Plant physiology · 2009Article
- AtAMT1;4, a pollen-specific high-affinity ammonium transporter of the plasma membrane in Arabidopsis.Plant & cell physiology · 2009Article
- Exploring the transport of plant metabolites using positron emitting radiotracers.HFSP journal · 2008Article
- Regulation of nitrate transport in citrus rootstocks depending on nitrogen availability.Plant signaling & behavior · 2007Article
- Ammonium transporter genes in Chlamydomonas: the nitrate-specific regulatory gene Nit2 is involved in Amt1;1 expression.Plant molecular biology · 2004Article
Corrections and comments
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The time course of 13NH4+ uptake and the distribution of 13NH4+ among plant parts and subcellular compartments was determined for 3-week-old rice (Oryza sativa L. cv M202) plants grown hydroponically in modified Johnson's nutrient solution containing 2,100, or 1000 [mu]M NH4+ (referred to hereafter as G2, G100, or G1000 plants, respectively). At steady state, the influx of 13NH4+ was determined to be 1.31, 5.78, and 10.11 [mu]mol g-1 fresh weight h-1, respectively, for G2, G100, and G1000 plants; efflux was 11, 20, and 29%, respectively, of influx. The NH4+ flux to the vacuole was calculated to be between 1 and 1.4 [mu]mol g-1 fresh weight h-1. By means of 13NH4+ efflux analysis, three kinetically distinct phases (superficial, cell wall, and cytoplasm) were identified, with t1/2 for 13NH4+ exchange of approximately 3 s and 1 and 8 min, respectively. Cytoplasmic [NH4+] was estimated to be 3.72, 20.55, and 38.08 mM for G2, G100, and G1000 plants, respectively. These concentrations were higher than vacuolar [NH4+], yet 72 to 92% of total root NH4+ was located in the vacuole. Distributions of newly absorbed 13NH4+ between plant parts and among the compartments were also examined. During a 30-min period G100 plants metabolized 19% of the influxed 13NH4+. The remainder (81%) was partitioned among the vacuole (20%), cytoplasm (41%), and efflux (20%). Of the metabolized 13N, roughly one-half was translocated to the shoots.
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Registered trials
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