Abstract
Abstract Corn ( Zea mays L.) and soybean ( Glycine max L.) plants grown in media containing a range of Pb concentrations, supplied as PbCl 2 , showed decreased net photosynthesis and transpiration with increasing Pb treatment levels. At lower Pb treatment levels, corn appears to be more sensitive than soybeans. However, at high treatment levels (62.5–250 mg/plant) soybeans are more sensitive than corn. At 250 mg Pb/plant in the medium, photosynthesis is only 10% of maximum in soybeans but 47% in corn, even though corn Pb tissue content is much higher than that of soybeans. Transpiration exhibited similar trends to photosynthesis suggesting that, especially in corn, an appreciable part of the inhibition of the two processes is related to increased stomatal resistances with increased Pb concentrations. Lead accumulation trends were similar at treatment levels of 0 to 62.5 mg/plant but were slightly different at higher levels. The total amount of Pb accumulated was higher in corn than in soybeans. Maximum accumulation in both species occurred at 62.5 mg Pb/plant.
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Claims 16
Claim · model-written summary
Corn net photosynthesis decreased as lead treatment increased.
- Taxon
- Corn
Zea mays subsp. mayse0 - Treatment
- Pb concentrationse0
- Outcome
- net photosynthesise0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn ( Zea mays L.) and soybean ( Glycine max L.) plants grown in media containing a range of Pb concentrations, supplied as PbCl 2 , showed decreased net photosynthesis and transpiration with increasing Pb treatment levels”
Claim · model-written summary
Corn transpiration decreased as lead treatment increased.
- Taxon
- CornZea mays subsp. mayse0
- Treatment
- Pb concentrationse0
- Outcome
- transpiratione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn ( Zea mays L.) and soybean ( Glycine max L.) plants grown in media containing a range of Pb concentrations, supplied as PbCl 2 , showed decreased net photosynthesis and transpiration with increasing Pb treatment levels”
Claim · model-written summary
Soybean net photosynthesis decreased as lead treatment increased.
- Taxon
- soybean
Glycine maxe0 - Treatment
- Pb concentrationse0
- Outcome
- net photosynthesise0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn ( Zea mays L.) and soybean ( Glycine max L.) plants grown in media containing a range of Pb concentrations, supplied as PbCl 2 , showed decreased net photosynthesis and transpiration with increasing Pb treatment levels”
Claim · model-written summary
Soybean transpiration decreased as lead treatment increased.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Pb concentrationse0
- Outcome
- transpiratione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn ( Zea mays L.) and soybean ( Glycine max L.) plants grown in media containing a range of Pb concentrations, supplied as PbCl 2 , showed decreased net photosynthesis and transpiration with increasing Pb treatment levels”
Claim · model-written summary
Corn was more sensitive than soybean at lower lead treatment levels.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- more sensitivee0
- Direction
- more sensitivee0
- Qualifier
- lower Pb treatment levelse0
- Comparator
- soybeanse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At lower Pb treatment levels, corn appears to be more sensitive than soybeans”
Claim · model-written summary
Soybean was more sensitive than corn at high lead treatment levels.
- Taxon
- soybeansGlycine maxe0
- Outcome
- more sensitivee0
- Direction
- more sensitivee0
- Qualifier
- 62.5–250 mg/plante0
- Comparator
- corne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at high treatment levels (62.5–250 mg/plant) soybeans are more sensitive than corn”
Claim · model-written summary
At 250 mg lead per plant, soybean photosynthesis was 10% of maximum.
- Taxon
- soybeansGlycine maxe0
- Outcome
- photosynthesise0
- Value
- 10%e0
- Qualifier
- 250 mg Pb/plante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 250 mg Pb/plant in the medium, photosynthesis is only 10% of maximum in soybeans but 47% in corn”
Claim · model-written summary
At 250 mg lead per plant, corn photosynthesis was 47% of maximum.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- photosynthesise0
- Value
- 47%e0
- Qualifier
- 250 mg Pb/plante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 250 mg Pb/plant in the medium, photosynthesis is only 10% of maximum in soybeans but 47% in corn”
Claim · model-written summary
Corn had higher tissue lead content than soybean.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- Pb tissue contente0
- Direction
- much highere0
- Comparator
- soybeanse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn Pb tissue content is much higher than that of soybeans”
Claim · model-written summary
Transpiration followed trends similar to photosynthesis under lead treatment.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- Transpiratione0
- Comparator
- photosynthesise0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transpiration exhibited similar trends to photosynthesis”
t0“Corn and Soybean”
Claim · model-written summary
Increased stomatal resistance was proposed as a contributor to photosynthesis and transpiration inhibition, especially in corn.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- inhibition of the two processese0
- Qualifier
- increased stomatal resistancese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“especially in corn, an appreciable part of the inhibition of the two processes is related to increased stomatal resistances with increased Pb concentrations”
Claim · model-written summary
Lead accumulation trends were similar across species at 0 to 62.5 mg per plant.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- Lead accumulation trendse0
- Qualifier
- 0 to 62.5 mg/plante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lead accumulation trends were similar at treatment levels of 0 to 62.5 mg/plant”
t0“Corn and Soybean”
Claim · model-written summary
Lead accumulation trends differed slightly at higher treatment levels.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- slightly differente0
- Qualifier
- higher levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but were slightly different at higher levels”
t0“Corn and Soybean”
Claim · model-written summary
Corn accumulated more total lead than soybean.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- total amount of Pb accumulatede0
- Direction
- highere0
- Comparator
- soybeanse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total amount of Pb accumulated was higher in corn than in soybeans”
Claim · model-written summary
Corn lead accumulation peaked at 62.5 mg lead per plant.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- Maximum accumulatione0
- Direction
- Maximume0
- Value
- 62.5 mg Pb/plante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum accumulation in both species occurred at 62.5 mg Pb/plant”
t0“Corn and Soybean”
Claim · model-written summary
Soybean lead accumulation peaked at 62.5 mg lead per plant.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- Maximum accumulatione0
- Direction
- Maximume0
- Value
- 62.5 mg Pb/plante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum accumulation in both species occurred at 62.5 mg Pb/plant”
t0“Corn and Soybean”
The same questions in other papers
lead atom · physiology: photosynthesis · Zea mays (maize)Results differ
6 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
4 papers more in this group
See all 8 papers →lead atom · physiology: photosynthesis · Glycine max (soybean)Results agree
1 paper in the same direction as this paper
- negative
lead atom · physiology: gas exchange · Zea mays (maize)Results agree
2 papers in the same direction as this paper
- negative
- negative
lead atom · physiology: gas exchange · Glycine max (soybean)Results agree
2 papers in the same direction as this paper
- negative
- negative
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.