Abstract
Abstract ‘Williams‐82’ Soybean [ Glycine max (L.) Merr.] plants, at the flowering stage, were exposed to NO 2 (0.1 µmol mol −1 , 7 h d −1 ) and CO 2 (450 µmol mol −1 , 12 h d −1 ) for 5 d singly and in combination in open‐top field chambers. The rate of photosynthesis (PN), specific root nodule nitrogenase activity (SNA), and leaf N were measured after exposure using the LICOR 6200 Portable Photosynthesis system, the acetylene‐ethylene reduction method, and the Kjeldahl digestion, respectively. The plants exposed to NO 2 (with 350 µmol mol −1 CO 2 ) showed significantly higher PN, SNA, and N compared with the control plants. The SNA and N were reduced, with no change in PN on exposing the plants to CO 2 (in the absence of NO 2 ). When the plants were exposed to a combination of these two gases, SNA was increased but the PN and N did not change. The stimulatory effect of NO 2 was reduced by the inhibitory impact of CO 2 on the parameters studied.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
NO2 increased photosynthesis, nitrogenase activity and leaf nitrogen relative to control.
- Taxon
- Soybean
Glycine maxt0 - Treatment
- NO 2e0
- Outcome
- PN, SNA, and Ne0
- Direction
- highere0
- Qualifier
- with 350 µmol mol −1 CO 2e0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plants exposed to NO 2 (with 350 µmol mol −1 CO 2 ) showed significantly higher PN, SNA, and N compared with the control plants”
t0“Soybean”
Claim · model-written summary
CO2 exposure reduced nitrogenase activity and leaf nitrogen.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- CO 2e0
- Outcome
- SNA and Ne0
- Direction
- reducede0
- Qualifier
- in the absence of NO 2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The SNA and N were reduced, with no change in PN on exposing the plants to CO 2 (in the absence of NO 2 )”
t0“Soybean”
Claim · model-written summary
CO2 exposure did not change photosynthesis.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- CO 2e0
- Outcome
- PNe0
- Direction
- no changee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The SNA and N were reduced, with no change in PN on exposing the plants to CO 2 (in the absence of NO 2 )”
t0“Soybean”
Claim · model-written summary
Combined NO2 and CO2 exposure increased nitrogenase activity.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- a combination of these two gasese0
- Outcome
- SNAe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the plants were exposed to a combination of these two gases, SNA was increased but the PN and N did not change”
t0“Soybean”
Claim · model-written summary
Combined NO2 and CO2 exposure did not change photosynthesis or leaf nitrogen.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- a combination of these two gasese0
- Outcome
- PN and Ne0
- Direction
- did not changee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the plants were exposed to a combination of these two gases, SNA was increased but the PN and N did not change”
t0“Soybean”
Claim · model-written summary
CO2 reduced the stimulatory effect of NO2.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- CO 2e0
- Outcome
- stimulatory effect of NO 2e0
- Direction
- reducede0
- Comparator
- NO 2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The stimulatory effect of NO 2 was reduced by the inhibitory impact of CO 2 on the parameters studied”
t0“Soybean”
The same questions in other papers
co2 · physiology: photosynthesis · Glycine max (soybean)Results differ
13 papers in the same direction as this paper · 50 in the opposite direction
- positive
- positive
- positive
60 papers more in this group
See all 64 papers →co2 · physiology: enzyme activity · Glycine max (soybean)Positive and negative results
2 papers in the same direction as this paper · 4 in the opposite direction
- negative
- positive
- positive
3 papers more in this group
See all 7 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.