Abstract
Abstract Iron‐efficient and ‐inefficient tomatoes (T3238 PER and T3238 fer, respectively) and soybeans (A7 and T203, respectively) were grown in nutrient solution culture for nine and seven days with four Pe‐Co treatments (0,0; 1,0; 1,1.2; and 0,1.2 mg/liter Pe and Co, respectively) . Both Pe‐eff icient and ‐inefficient cultivars exhibited Pe‐ and Co‐induced chlorosis, but the efficient PER cultivar was least susceptible to both stresses. Cobalt generally decreased net photosynthesis (Pn), chlorophyll, and foliar iron in either the presence or absence of Pe. After nine and seven days of growth in the above treatments (tomato and soybean, respectively), new solutions were introduced to all of the above treatments, and 1 mg Pe/liter was added to three treatments to study regreening (designated 0,0+; 0,1.2+; 1,1.2+); the original control treatments (0,0; 1,0) continued without additional iron. Recovery of Pn and chlorophyll from added Pe was observed in all cultivars for the 0,0+ treatment, was variable among cultivars for the 1,1.2+ treatment, and was observed only in PER tomato for the 0,1.2+ treatment. Any influx of Pe during the regreening phase accumulated primarily in the leaves in the absence of Co (0,0+) and in the roots in the presence of Co (0,1.2+ and 1,1.2+). Iron‐stress responses (pH and reductant) were apparent only with 0,0 treatment for A7 and PER and were eliminated by adding Pe (0,0+).
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Claims 8
Claim · model-written summary
Cobalt decreased net photosynthesis, chlorophyll and foliar iron in tomato and soybean, with or without added iron.
- Taxon
- tomatoes and soybeans
Glycine max
Solanum lycopersicumt0 - Treatment
- Cobalte3
- Outcome
- net photosynthesis (Pn), chlorophyll, and foliar irone3
- Direction
- decreasede3
- Qualifier
- in either the presence or absence of Pee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Influence of cobalt and iron on photosynthesis, chlorophyll, and nutrient content in regreening chlorotic tomatoes and soybeans”
e3“Cobalt generally decreased net photosynthesis (Pn), chlorophyll, and foliar iron in either the presence or absence of Pe”
Claim · model-written summary
The efficient PER tomato cultivar was least susceptible to both stresses.
- Taxon
- tomatoes and soybeansGlycine maxSolanum lycopersicumt0
- Material
- PERe2
- Outcome
- least susceptiblee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Influence of cobalt and iron on photosynthesis, chlorophyll, and nutrient content in regreening chlorotic tomatoes and soybeans”
e2“the efficient PER cultivar was least susceptible to both stresses”
Claim · model-written summary
Recovery of Pn and chlorophyll from added Pe was observed in all cultivars at the 0,0+ treatment.
- Taxon
- tomatoes and soybeansGlycine maxSolanum lycopersicumt0
- Material
- all cultivarse4
- Treatment
- added Pee4
- Outcome
- Recovery of Pn and chlorophylle4
- Direction
- Recoverye4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Influence of cobalt and iron on photosynthesis, chlorophyll, and nutrient content in regreening chlorotic tomatoes and soybeans”
e4“Recovery of Pn and chlorophyll from added Pe was observed in all cultivars for the 0,0+ treatment, was variable among cultivars for the 1,1.2+ treatment, and was observed only in PER tomato for the 0,1.2+ treatment”
Claim · model-written summary
Added Pe accumulated primarily in the leaves in the absence of Co.
- Taxon
- tomatoes and soybeansGlycine maxSolanum lycopersicumt0
- Organ / stage
- leavese5
- Treatment
- in the absence of Coe5
- Outcome
- accumulated primarily in the leavese5
- Qualifier
- Any influx of Pe during the regreening phasee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Influence of cobalt and iron on photosynthesis, chlorophyll, and nutrient content in regreening chlorotic tomatoes and soybeans”
e5“Any influx of Pe during the regreening phase accumulated primarily in the leaves in the absence of Co (0,0+) and in the roots in the presence of Co (0,1.2+ and 1,1.2+)”
Claim · model-written summary
Added Pe accumulated primarily in the roots in the presence of Co.
- Taxon
- tomatoes and soybeansGlycine maxSolanum lycopersicumt0
- Organ / stage
- rootse5
- Treatment
- in the presence of Coe5
- Outcome
- in the rootse5
- Qualifier
- Any influx of Pe during the regreening phasee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Influence of cobalt and iron on photosynthesis, chlorophyll, and nutrient content in regreening chlorotic tomatoes and soybeans”
e5“Any influx of Pe during the regreening phase accumulated primarily in the leaves in the absence of Co (0,0+) and in the roots in the presence of Co (0,1.2+ and 1,1.2+)”
Claim · model-written summary
Adding Pe eliminated the iron-stress responses (pH and reductant) that were apparent at the 0,0 treatment.
- Taxon
- tomatoes and soybeansGlycine maxSolanum lycopersicumt0
- Treatment
- adding Pee6
- Outcome
- responses (pH and reductant)e6
- Direction
- eliminatede6
- Comparator
- 0,0 treatmente6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Influence of cobalt and iron on photosynthesis, chlorophyll, and nutrient content in regreening chlorotic tomatoes and soybeans”
e6“responses (pH and reductant) were apparent only with 0,0 treatment for A7 and PER and were eliminated by adding Pe (0,0+)”
Claim · model-written summary
Recovery of Pn and chlorophyll from added Pe was variable among cultivars at the 1,1.2+ treatment.
- Taxon
- tomatoes and soybeansGlycine maxSolanum lycopersicumt0
- Treatment
- 1,1.2+e4
- Outcome
- Recovery of Pn and chlorophylle4
- Direction
- variablee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Influence of cobalt and iron on photosynthesis, chlorophyll, and nutrient content in regreening chlorotic tomatoes and soybeans”
e4“Recovery of Pn and chlorophyll from added Pe was observed in all cultivars for the 0,0+ treatment, was variable among cultivars for the 1,1.2+ treatment, and was observed only in PER tomato for the 0,1.2+ treatment”
Claim · model-written summary
Recovery of Pn and chlorophyll from added Pe was observed only in PER tomato at the 0,1.2+ treatment.
- Taxon
- tomatoes and soybeansGlycine maxSolanum lycopersicumt0
- Material
- PER tomatoe4
- Treatment
- 0,1.2+e4
- Outcome
- Recovery of Pn and chlorophylle4
- Direction
- observed onlye4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Influence of cobalt and iron on photosynthesis, chlorophyll, and nutrient content in regreening chlorotic tomatoes and soybeans”
e4“Recovery of Pn and chlorophyll from added Pe was observed in all cultivars for the 0,0+ treatment, was variable among cultivars for the 1,1.2+ treatment, and was observed only in PER tomato for the 0,1.2+ treatment”
The same questions in other papers
cobalt atom · physiology: photosynthesis · Glycine max (soybean)Results differ
3 in the opposite direction
- positive
- positive
- positive
cobalt atom · physiology: photosynthesis · Solanum lycopersicum (tomato)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- 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.