Abstract
Two mutants of tomato and their corresponding wild-type genotypes, Tfer/TFER and chloronerva/Bonner Beste, were grown in nutrient solution under conditions leading to iron (Fe) deficiency. Iron deficiency caused decreases in growth, leaf chlorosis, and changes in the morphology of roots. Ferric chelate reductase activities of whole roots were generally lower in Fe-deficient plants than in control, Fe-sufficient plants. Plants grown for 7 days without Fe, however, had transient increases in whole root ferric chelate reductase activity after the addition of small amounts of Fe (2 μM) to the nutrient solution. Also, adding sequential 0.5 μM Fe pulses to the nutrient solution led to high whole root ferric chelate reductase activities. Similar results were obtained with a protocol using excised root tips instead of whole root systems to measure ferric chelate reductase activities. The protocol using root tips generally gave higher ferric chelate reductase rates than the method using whole roots, due to the localized expression of the enzyme in the distal root zones.
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Claims 9
Claim · model-written summary
Iron deficiency decreased tomato growth.
- Taxon
- tomato
Solanum lycopersicume0 - Material
- Tfer/TFER and chloronerva/Bonner Bestee0
- Treatment
- Iron deficiencye1
- Outcome
- growthe1
- Direction
- decreasese1
- Setting
- nutrient solutione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two mutants of tomato and their corresponding wild-type genotypes, Tfer/TFER and chloronerva/Bonner Beste, were grown in nutrient solution under conditions leading to iron (Fe) deficiency”
e1“Iron deficiency caused decreases in growth, leaf chlorosis, and changes in the morphology of roots”
Claim · model-written summary
Iron deficiency caused leaf chlorosis in tomato.
- Taxon
- tomatoSolanum lycopersicume0
- Material
- Tfer/TFER and chloronerva/Bonner Bestee0
- Treatment
- Iron deficiencye1
- Outcome
- leaf chlorosise1
- Setting
- nutrient solutione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two mutants of tomato and their corresponding wild-type genotypes, Tfer/TFER and chloronerva/Bonner Beste, were grown in nutrient solution under conditions leading to iron (Fe) deficiency”
e1“Iron deficiency caused decreases in growth, leaf chlorosis, and changes in the morphology of roots”
Claim · model-written summary
Iron deficiency changed root morphology in tomato.
- Taxon
- tomatoSolanum lycopersicume0
- Material
- Tfer/TFER and chloronerva/Bonner Bestee0
- Treatment
- Iron deficiencye1
- Outcome
- morphology of rootse1
- Setting
- nutrient solutione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two mutants of tomato and their corresponding wild-type genotypes, Tfer/TFER and chloronerva/Bonner Beste, were grown in nutrient solution under conditions leading to iron (Fe) deficiency”
e1“Iron deficiency caused decreases in growth, leaf chlorosis, and changes in the morphology of roots”
Claim · model-written summary
Whole-root ferric chelate reductase activities were lower in Fe-deficient tomato plants than in Fe-sufficient controls.
- Taxon
- tomatoSolanum lycopersicume0
- Material
- Tfer/TFER and chloronerva/Bonner Bestee0
- Organ / stage
- whole rootse2
- Treatment
- Fe-deficient plantse2
- Outcome
- Ferric chelate reductase activitiese2
- Direction
- lowere2
- Comparator
- control, Fe-sufficient plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two mutants of tomato and their corresponding wild-type genotypes, Tfer/TFER and chloronerva/Bonner Beste, were grown in nutrient solution under conditions leading to iron (Fe) deficiency”
e2“Ferric chelate reductase activities of whole roots were generally lower in Fe-deficient plants than in control, Fe-sufficient plants”
Claim · model-written summary
Whole-root ferric chelate reductase activity increased transiently after adding 2 μM Fe to Fe-starved tomato plants.
- Taxon
- tomatoSolanum lycopersicume0
- Material
- Tfer/TFER and chloronerva/Bonner Bestee0
- Organ / stage
- whole roote3
- Treatment
- after the addition of small amounts of Fe (2 μM)e3
- Outcome
- whole root ferric chelate reductase activitye3
- Direction
- increasese3
- Comparator
- Plants grown for 7 days without Fee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two mutants of tomato and their corresponding wild-type genotypes, Tfer/TFER and chloronerva/Bonner Beste, were grown in nutrient solution under conditions leading to iron (Fe) deficiency”
e3“Plants grown for 7 days without Fe, however, had transient increases in whole root ferric chelate reductase activity after the addition of small amounts of Fe (2 μM) to the nutrient solution”
Claim · model-written summary
Sequential 0.5 μM Fe pulses led to high whole-root ferric chelate reductase activities in tomato.
- Taxon
- tomatoSolanum lycopersicume0
- Material
- Tfer/TFER and chloronerva/Bonner Bestee0
- Organ / stage
- whole roote4
- Treatment
- adding sequential 0.5 μM Fe pulsese4
- Outcome
- whole root ferric chelate reductase activitiese4
- Direction
- highe4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two mutants of tomato and their corresponding wild-type genotypes, Tfer/TFER and chloronerva/Bonner Beste, were grown in nutrient solution under conditions leading to iron (Fe) deficiency”
e4“adding sequential 0.5 μM Fe pulses to the nutrient solution led to high whole root ferric chelate reductase activities”
Claim · model-written summary
The excised root-tip protocol gave higher ferric chelate reductase rates than the whole-root method in tomato.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- ferric chelate reductase ratese5
- Direction
- highere5
- Comparator
- the method using whole rootse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two mutants of tomato and their corresponding wild-type genotypes, Tfer/TFER and chloronerva/Bonner Beste, were grown in nutrient solution under conditions leading to iron (Fe) deficiency”
e5“The protocol using root tips generally gave higher ferric chelate reductase rates than the method using whole roots”
Claim · model-written summary
The excised root-tip protocol gave results similar to the whole-root protocol for ferric chelate reductase activity.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- ferric chelate reductase activitiese6
- Qualifier
- Similar resultse6
- Comparator
- whole root systemse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two mutants of tomato and their corresponding wild-type genotypes, Tfer/TFER and chloronerva/Bonner Beste, were grown in nutrient solution under conditions leading to iron (Fe) deficiency”
e6“Similar results were obtained with a protocol using excised root tips instead of whole root systems to measure ferric chelate reductase activities”
Claim · model-written summary
The higher reductase rates with root tips may be due to localized expression of the enzyme in the distal root zones.
- Taxon
- tomatoSolanum lycopersicume0
- Organ / stage
- distal root zonese5
- Outcome
- higher ferric chelate reductase ratese5
- Qualifier
- localized expression of the enzyme in the distal root zonese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two mutants of tomato and their corresponding wild-type genotypes, Tfer/TFER and chloronerva/Bonner Beste, were grown in nutrient solution under conditions leading to iron (Fe) deficiency”
e5“The protocol using root tips generally gave higher ferric chelate reductase rates than the method using whole roots, due to the localized expression of the enzyme in the distal root zones”
The same questions in other papers
iron atom · growth · Solanum lycopersicum (tomato)Results differ
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This paper is about lacking the nutrient, so it counts the other way round here.
- negative
- negative
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8 papers in the same direction as this paper · 3 in the opposite direction · 1 reporting no difference from an alternative
This paper is about lacking the nutrient, so it counts the other way round here.
- negative
- negative
- no effect
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See all 13 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.