Abstract
Abstract Tomato plants ( Lycopersicum esculentum Mill. cv. Moneymaker) grown on nutrient medium containing cadmium exhibit reduced net photosynthesis and reduced contents of chlorophyll and accessory pigments. In chloroplasts isolated from cadmiumtreated plants photosystem II activity, as measured by 2,6‐dichlorophenolindophenol photoreduction, and photosystem II + I activity (H 2 O → methyl viologen) were both inhibited to about 60%. When 1,5‐diphenylcarbazide was used as artificial electron donor, no significant cadmium effect was observed. Photosystem I activity was not affected by cadmium. The fine structure of chloroplasts in cadmium‐treated plants was degenerated, similarly to senescence response. The principal symptom of cadmium action was the occurrence of large plastoglobules and a disorganization of the lamellar structure, mainly grana stacks. Transfer of cadmium‐treated plants into a medium with increased manganese level caused grana stacking and restoration of photosystem II activity.
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Claims 7
Claim · model-written summary
Cadmium reduced net photosynthesis and pigment contents in tomato.
- Taxon
- Tomato
Solanum lycopersicume0 - Material
- Moneymakere0
- Treatment
- cadmiume0
- Outcome
- net photosynthesis and reduced contents of chlorophyll and accessory pigmentse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tomato plants ( Lycopersicum esculentum Mill. cv. Moneymaker) grown on nutrient medium containing cadmium exhibit reduced net photosynthesis and reduced contents of chlorophyll and accessory pigments”
Claim · model-written summary
Cadmium inhibited photosystem II activity to about 60%.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- chloroplastse0
- Treatment
- cadmiume0
- Outcome
- photosystem II activitye0
- Direction
- inhibitede0
- Value
- about 60%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In chloroplasts isolated from cadmiumtreated plants photosystem II activity, as measured by 2,6‐dichlorophenolindophenol photoreduction, and photosystem II + I activity (H 2 O → methyl viologen) were both inhibited to about 60%”
t0“tomato”
Claim · model-written summary
Cadmium inhibited combined photosystem II and I activity to about 60%.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- chloroplastse0
- Treatment
- cadmiume0
- Outcome
- photosystem II + I activitye0
- Direction
- inhibitede0
- Value
- about 60%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In chloroplasts isolated from cadmiumtreated plants photosystem II activity, as measured by 2,6‐dichlorophenolindophenol photoreduction, and photosystem II + I activity (H 2 O → methyl viologen) were both inhibited to about 60%”
t0“tomato”
Claim · model-written summary
Using diphenylcarbazide as electron donor revealed no significant cadmium effect.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- cadmiume0
- Outcome
- cadmium effecte0
- Direction
- no significante0
- Qualifier
- 1,5‐diphenylcarbazidee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When 1,5‐diphenylcarbazide was used as artificial electron donor, no significant cadmium effect was observed”
t0“tomato”
Claim · model-written summary
Cadmium did not affect photosystem I activity.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- cadmiume0
- Outcome
- Photosystem I activitye0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photosystem I activity was not affected by cadmium”
t0“tomato”
Claim · model-written summary
Cadmium damaged chloroplast fine structure, including large plastoglobules and disrupted grana.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- chloroplastse0
- Treatment
- cadmiume0
- Outcome
- fine structure of chloroplastse0
- Direction
- degeneratede0
- Qualifier
- large plastoglobules and a disorganization of the lamellar structure, mainly grana stackse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fine structure of chloroplasts in cadmium‐treated plants was degenerated, similarly to senescence response. The principal symptom of cadmium action was the occurrence of large plastoglobules and a disorganization of the lamellar structure, mainly grana stacks”
t0“tomato”
Claim · model-written summary
Higher manganese restored grana stacking and photosystem II activity in cadmium-treated plants.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- increased manganese levele0
- Outcome
- grana stacking and restoration of photosystem II activitye0
- Direction
- restoratione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transfer of cadmium‐treated plants into a medium with increased manganese level caused grana stacking and restoration of photosystem II activity”
t0“tomato”
The same questions in other papers
cadmium atom · nutrient: content · Solanum lycopersicum (tomato)Positive and negative results
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- positive
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15 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
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14 papers more in this group
See all 18 papers →cadmium atom · soil: physics · Solanum lycopersicum (tomato)Results agree
1 paper in the same direction as this paper
- 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.