ArticleJournal of experimental botany2013
Elevated atmospheric CO2 decreases the ammonia compensation point of barley plants.
Article in Journal of experimental botany, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed.
- The grain protein yield of barley under future drought is modified by the joint action of elevated CO2 and temperature.Journal of experimental botany · 2026Article
- Nitrogen fertilizer modulated the effect of drought priming on photosynthesis, antioxidant defense, nitrogen metabolism, yield in summer maize.Frontiers in plant science · 2026Article
- Nitrogen metabolic rate and differential ammonia volatilization regulate resistance against opportunistic fungusFrontiers in plant science · 2022Article
- Low assimilation efficiency of photorespiratory ammonia in conifer leaves.Journal of plant research · 2018Article
- Properties of nitrogen fertilization are decisive in determining the effects of elevated atmospheric CO2 on the activity of nitrate reductase in plants.Plant signaling & behavior · 2016Article
- Carbon dioxide level and form of soil nitrogen regulate assimilation of atmospheric ammonia in young trees.Scientific reports · 2015Article
- A phospholipid uptake system in the model plant Arabidopsis thaliana.Nature communications · 2015Article
- Changes in C-N metabolism under elevated CO2 and temperature in Indian mustard (Brassica juncea L.): an adaptation strategy under climate change scenario.Journal of plant research · 2014Article
- Bidirectional exchange of biogenic volatiles with vegetation: emission sources, reactions, breakdown and deposition.Plant, cell & environment · 2014Review
- Nitrogen-Centric Molecular Mechanisms in Crop Plants Under Elevated COPhysiologia plantarumReview
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4 authors.
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Abstract
The ammonia compensation point ( ) controls the direction and magnitude of NH3 exchange between plant leaves and the atmosphere. Very limited information is currently available on how responds to anticipated climate changes. Young barley plants were grown for 2 weeks at ambient (400 μmol mol(-1)) or elevated (800 μmol mol(-1)) CO2 concentration with or NH4NO3 as the nitrogen source. The concentrations of and H(+) in the leaf apoplastic solution were measured along with different foliar N pools and enzymes involved in N metabolism. Elevated CO2 caused a threefold decrease in the concentration in the apoplastic solution and slightly acidified it. This resulted in a decline of the from 2.25 and 2.95 nmol mol(-1) under ambient CO2 to 0.37 and 0.89 nmol mol(-1) at elevated CO2 in the and NH4NO3 treatments, respectively. The decrease in at elevated CO2 reflected a lower N concentration (-25%) in the shoot dry matter. The activity of nitrate reductase also declined (-45 to -60%), while that of glutamine synthetase was unaffected by elevated CO2. It is concluded that elevated CO2 increases the likelihood of plants being a sink for atmospheric NH3 and reduces episodes of NH3 emission from plants.
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