Abstract
With the aim to determine the effects of CO2 on nitrogen metabolism mungbean (Vigna radiata) plants were grown from seedling emergence to maturity inside open top chambers under ambient CO2 (CA, 350 ± 25 µmol mol-1) and elevated CO2 (CE, 600 ± 50 µmol mol-1) concentrations at the Indian Agricultural Research Institute, New Delhi. Leaflet blades of the same physiological age were sampled at 20, 35 and 50 d after germination. Total nitrogen concentration in dry mass was consistently lower under CE than in CA. Non-protein nitrogen and protein nitrogen were also decreased under CE Total soluble protein content also decreased up to 35 d after germination under CE. However, a 27 % increase in protein content at 50 d after germination due to CE was observed. A significant decrease in total free amino acid under CE at 20 d after germination was observed. CE also brought about a remarkable decrease in the activity of nitrate reductase in leaves at 20 d after germination but increase at 35 d and 50 d after germination. Nitrogenase activity increased at all growth stages due to CE. Although total harvested leaves of CE plants accumulated more nitrogen, the relative amount of nitrogen on a percentage basis was low, probably due to a comparatively greater accumulation of sugars in the leaves of CE plants.
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Claims 11
Claim · model-written summary
Elevated CO2 lowered total nitrogen in dry mass.
- Taxon
- Vigna radiata
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Vigna radiatat0 - Treatment
- elevated CO2e1
- Outcome
- Total nitrogen concentration in dry masse0
- Direction
- lowere0
- Comparator
- ambient CO2e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Total nitrogen concentration in dry mass was consistently lower under CE than in CA.”
e1“under ambient CO2 (CA, 350 ± 25 µmol mol-1) and elevated CO2 (CE, 600 ± 50 µmol mol-1) concentrations”
t0“Vigna Radiata”
Claim · model-written summary
Elevated CO2 decreased non-protein nitrogen.
- Taxon
- Vigna radiataVigna radiatat0
- Treatment
- elevated CO2e1
- Outcome
- Non-protein nitrogene0
- Direction
- decreasede0
- Comparator
- ambient CO2e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Non-protein nitrogen and protein nitrogen were also decreased under CE”
e1“under ambient CO2 (CA, 350 ± 25 µmol mol-1) and elevated CO2 (CE, 600 ± 50 µmol mol-1) concentrations”
t0“Vigna Radiata”
Claim · model-written summary
Elevated CO2 decreased protein nitrogen.
- Taxon
- Vigna radiataVigna radiatat0
- Treatment
- elevated CO2e1
- Outcome
- protein nitrogene0
- Direction
- decreasede0
- Comparator
- ambient CO2e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Non-protein nitrogen and protein nitrogen were also decreased under CE”
e1“under ambient CO2 (CA, 350 ± 25 µmol mol-1) and elevated CO2 (CE, 600 ± 50 µmol mol-1) concentrations”
t0“Vigna Radiata”
Claim · model-written summary
Elevated CO2 decreased soluble protein through day 35.
- Taxon
- Vigna radiataVigna radiatat0
- Treatment
- elevated CO2e1
- Outcome
- Total soluble protein contente0
- Direction
- decreasede0
- Qualifier
- up to 35 d after germinatione0
- Comparator
- ambient CO2e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total soluble protein content also decreased up to 35 d after germination under CE.”
e1“under ambient CO2 (CA, 350 ± 25 µmol mol-1) and elevated CO2 (CE, 600 ± 50 µmol mol-1) concentrations”
t0“Vigna Radiata”
Claim · model-written summary
Elevated CO2 increased protein content by 27% at day 50.
- Taxon
- Vigna radiataVigna radiatat0
- Treatment
- elevated CO2e1
- Outcome
- protein contente0
- Direction
- increasee0
- Value
- 27 %e0
- Qualifier
- at 50 d after germinatione0
- Comparator
- ambient CO2e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 27 % increase in protein content at 50 d after germination due to CE”
e1“under ambient CO2 (CA, 350 ± 25 µmol mol-1) and elevated CO2 (CE, 600 ± 50 µmol mol-1) concentrations”
t0“Vigna Radiata”
Claim · model-written summary
Elevated CO2 decreased free amino acids at day 20.
- Taxon
- Vigna radiataVigna radiatat0
- Treatment
- elevated CO2e1
- Outcome
- total free amino acide0
- Direction
- decreasee0
- Qualifier
- at 20 d after germinatione0
- Comparator
- ambient CO2e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant decrease in total free amino acid under CE at 20 d after germination”
e1“under ambient CO2 (CA, 350 ± 25 µmol mol-1) and elevated CO2 (CE, 600 ± 50 µmol mol-1) concentrations”
t0“Vigna Radiata”
Claim · model-written summary
Elevated CO2 decreased leaf nitrate reductase at day 20.
- Taxon
- Vigna radiataVigna radiatat0
- Treatment
- elevated CO2e1
- Outcome
- activity of nitrate reductase in leavese0
- Direction
- decreasee0
- Qualifier
- at 20 d after germinatione0
- Comparator
- ambient CO2e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CE also brought about a remarkable decrease in the activity of nitrate reductase in leaves at 20 d after germination but increase at 35 d and 50 d after germination”
e1“under ambient CO2 (CA, 350 ± 25 µmol mol-1) and elevated CO2 (CE, 600 ± 50 µmol mol-1) concentrations”
t0“Vigna Radiata”
Claim · model-written summary
Elevated CO2 increased leaf nitrate reductase at days 35 and 50.
- Taxon
- Vigna radiataVigna radiatat0
- Treatment
- elevated CO2e1
- Outcome
- activity of nitrate reductase in leavese0
- Direction
- increasee0
- Qualifier
- at 35 d and 50 d after germinatione0
- Comparator
- ambient CO2e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CE also brought about a remarkable decrease in the activity of nitrate reductase in leaves at 20 d after germination but increase at 35 d and 50 d after germination”
e1“under ambient CO2 (CA, 350 ± 25 µmol mol-1) and elevated CO2 (CE, 600 ± 50 µmol mol-1) concentrations”
t0“Vigna Radiata”
Claim · model-written summary
Elevated CO2 increased nitrogenase activity at all stages.
- Taxon
- Vigna radiataVigna radiatat0
- Treatment
- elevated CO2e1
- Outcome
- Nitrogenase activitye0
- Direction
- increasede0
- Qualifier
- at all growth stagese0
- Comparator
- ambient CO2e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogenase activity increased at all growth stages due to CE.”
e1“under ambient CO2 (CA, 350 ± 25 µmol mol-1) and elevated CO2 (CE, 600 ± 50 µmol mol-1) concentrations”
t0“Vigna Radiata”
Claim · model-written summary
Elevated CO2 plants accumulated more nitrogen in harvested leaves.
- Taxon
- Vigna radiataVigna radiatat0
- Treatment
- elevated CO2e1
- Outcome
- total harvested leaves of CE plants accumulated more nitrogene0
- Direction
- moree0
- Comparator
- ambient CO2e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total harvested leaves of CE plants accumulated more nitrogen”
e1“under ambient CO2 (CA, 350 ± 25 µmol mol-1) and elevated CO2 (CE, 600 ± 50 µmol mol-1) concentrations”
t0“Vigna Radiata”
Claim · model-written summary
Elevated CO2 plants had a lower relative nitrogen percentage.
- Taxon
- Vigna radiataVigna radiatat0
- Treatment
- elevated CO2e1
- Outcome
- relative amount of nitrogen on a percentage basise0
- Direction
- lowe0
- Comparator
- ambient CO2e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the relative amount of nitrogen on a percentage basis was low”
e1“under ambient CO2 (CA, 350 ± 25 µmol mol-1) and elevated CO2 (CE, 600 ± 50 µmol mol-1) concentrations”
t0“Vigna Radiata”
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See all 15 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.