Abstract
Abstract Detached corn and sunflower leaves exposed to various concentrations of Cd, supplied as CdCl 2 , exhibit reduced photosynthesis and transpiration. The reduction is dependent on the concentration of CdCl 2 solution and generally becomes more pronounced with time. In sunflower, net photosynthesis and transpiration are completely inhibited within 45 min after the introduction of 18 m M Cd. Within two hours net photosynthesis is reduced to 40% and 70% of maximum after the introduction of 9 and 4.5 m M Cd respectively. In corn the trend of photo‐synthetic response to Cd is similar to that in sunflower except that the inhibition in corn is more pronounced at all treatment levels. A strong linear relationship between photosynthesis and transpiration inhibition is obtained in both species suggesting that Cd contamination induces stomatal closure.
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Claims 9
Claim · model-written summary
Cd reduced photosynthesis and transpiration in corn leaves.
- Taxon
- corn
Zea mays subsp. mayse0 - Organ / stage
- leavese0
- Treatment
- Cde0
- Outcome
- photosynthesis and transpiratione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Detached corn and sunflower leaves exposed to various concentrations of Cd, supplied as CdCl 2 , exhibit reduced photosynthesis and transpiration.”
Claim · model-written summary
Cd reduced photosynthesis and transpiration in sunflower leaves.
- Taxon
- sunflower
Helianthus annuuse0 - Organ / stage
- leavese0
- Treatment
- Cde0
- Outcome
- photosynthesis and transpiratione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Detached corn and sunflower leaves exposed to various concentrations of Cd, supplied as CdCl 2 , exhibit reduced photosynthesis and transpiration.”
Claim · model-written summary
Cd inhibition increased with concentration and generally with time.
- Taxon
- corn and sunflowerHelianthus annuusZea mays subsp. mayst0
- Treatment
- concentration of CdCl 2 solutione0
- Outcome
- reductione0
- Direction
- more pronouncede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reduction is dependent on the concentration of CdCl 2 solution and generally becomes more pronounced with time.”
t0“Corn and Sunflower”
Claim · model-written summary
In sunflower 18 m M Cd completely inhibited net photosynthesis and transpiration within 45 min.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- 18 m M Cde0
- Outcome
- net photosynthesis and transpiratione0
- Direction
- completely inhibitede0
- Qualifier
- within 45 mine0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In sunflower, net photosynthesis and transpiration are completely inhibited within 45 min after the introduction of 18 m M Cd.”
Claim · model-written summary
At 9 m M Cd, sunflower net photosynthesis fell to 40% of maximum within two hours.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- 9 and 4.5 m M Cde0
- Outcome
- net photosynthesise0
- Direction
- reducede0
- Value
- 40%e0
- Qualifier
- Within two hourse0
- Comparator
- maximume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Within two hours net photosynthesis is reduced to 40% and 70% of maximum after the introduction of 9 and 4.5 m M Cd respectively.”
t0“sunflower”
Claim · model-written summary
At 4.5 m M Cd, sunflower net photosynthesis fell to 70% of maximum within two hours.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- 4.5 m M Cde0
- Outcome
- net photosynthesise0
- Direction
- reducede0
- Value
- 70%e0
- Qualifier
- Within two hourse0
- Comparator
- maximume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Within two hours net photosynthesis is reduced to 40% and 70% of maximum after the introduction of 9 and 4.5 m M Cd respectively.”
t0“sunflower”
Claim · model-written summary
Corn photosynthetic inhibition was more pronounced than sunflower at all treatment levels.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Cde0
- Outcome
- inhibition in corne0
- Direction
- more pronouncede0
- Comparator
- sunflowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In corn the trend of photo‐synthetic response to Cd is similar to that in sunflower except that the inhibition in corn is more pronounced at all treatment levels.”
Claim · model-written summary
Photosynthesis and transpiration inhibition had a strong linear relationship in both species.
- Taxon
- Corn and SunflowerHelianthus annuusZea mays subsp. mayst0
- Treatment
- Cdt0
- Outcome
- photosynthesis and transpiration inhibitione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A strong linear relationship between photosynthesis and transpiration inhibition is obtained in both species”
t0“Effect of Cd on Photosynthesis and Transpiration of Excised Leaves of Corn and Sunflower”
Claim · model-written summary
The coupled inhibition suggested Cd-induced stomatal closure.
- Taxon
- corn and sunflowerHelianthus annuusZea mays subsp. mayst0
- Treatment
- Cd contaminatione0
- Outcome
- stomatal closuree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“suggesting that Cd contamination induces stomatal closure.”
t0“Corn and Sunflower”
The same questions in other papers
cadmium atom · physiology: photosynthesis · Zea mays (maize)Positive and negative results
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- positive
- no effect
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8 papers in the same direction as this paper
- no effect
- negative
- negative
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See all 9 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.