Abstract
Abstract Two tomato [Lycopersicon esculentum) cvs. Blizzard and Liberto, were grown hydroponically in a Controlled Temperature (CT) room for five weeks to investigate the effectiveness of foliar application of supplementary iron (Fe) to the leaves of plant grown at high zinc concentration (5 mg L−1). Zinc (Zn) concentrations were 0.5 or 5 mg L−1 in complete nutrient solution. One week after application of Zn at 5 mg L−1, supplementary iron ( 28 mg L−1 for a week and 56 mg L−1 for a week) was supplied via leaves to the plants grown at 5mg L−1 Zn. The plants grown at 5mg L−1 Zn produced less dry matter and chlorophyll than those at 0.5mg L−1 for both cultivars. Foliar application of supplementary iron resulted in increases in dry matter and chlorophyll concentrations for both cultivars. These increases were greater in Liberto than in Blizzard. Zinc concentration in plant tissues increased to toxic levels for both cultivars in the high zinc treatment. Application of supplementary Fe as a foliar spray decreased Zn concentration in the leaves and roots of plants grown at high Zn, but its concentrations were still at detrimental levels. Iron concentration in leaves declined to the deficient level in the high (5 mg L−1) Zn treatment, but was markedly increased in the roots. Application of supplementary Fe corrected Fe deficiency in leaves of plants grown at 5mg L−1 Zn and reduced root Fe concentrations.
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Claims 9
Claim · model-written summary
High zinc reduced dry matter and chlorophyll.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- 5mg L−1 Zne0
- Outcome
- dry matter and chlorophylle0
- Direction
- lesse0
- Comparator
- 0.5mg L−1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plants grown at 5mg L−1 Zn produced less dry matter and chlorophyll than those at 0.5mg L−1 for both cultivars.”
t0“tomato”
Claim · model-written summary
Foliar iron increased dry matter and chlorophyll.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Foliar application of supplementary irone0
- Outcome
- dry matter and chlorophyll concentrationse0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of supplementary iron resulted in increases in dry matter and chlorophyll concentrations for both cultivars.”
t0“tomato”
Claim · model-written summary
The increases were greater in Liberto than Blizzard.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- Libertoe0
- Outcome
- increasese0
- Direction
- greatere0
- Comparator
- Blizzarde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These increases were greater in Liberto than in Blizzard.”
t0“tomato”
Claim · model-written summary
High zinc raised tissue zinc to toxic levels.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- high zinc treatmente0
- Outcome
- Zinc concentration in plant tissuese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc concentration in plant tissues increased to toxic levels for both cultivars in the high zinc treatment.”
t0“tomato”
Claim · model-written summary
Foliar iron decreased leaf and root zinc, though levels remained detrimental.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Application of supplementary Fe as a foliar spraye0
- Outcome
- Zn concentration in the leaves and rootse0
- Direction
- decreasede0
- Qualifier
- still at detrimental levelse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of supplementary Fe as a foliar spray decreased Zn concentration in the leaves and roots of plants grown at high Zn, but its concentrations were still at detrimental levels.”
t0“tomato”
Claim · model-written summary
High zinc lowered leaf iron to deficiency.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- high (5 mg L−1) Zn treatmente0
- Outcome
- Iron concentration in leavese0
- Direction
- declinede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Iron concentration in leaves declined to the deficient level in the high (5 mg L−1) Zn treatment”
t0“tomato”
Claim · model-written summary
High zinc increased root iron.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- rootse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but was markedly increased in the roots.”
t0“tomato”
Claim · model-written summary
Foliar iron corrected leaf iron deficiency.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Application of supplementary Fee0
- Outcome
- Fe deficiency in leavese0
- Direction
- correctede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of supplementary Fe corrected Fe deficiency in leaves of plants grown at 5mg L−1 Zn and reduced root Fe concentrations.”
t0“tomato”
Claim · model-written summary
Foliar iron reduced root iron concentrations.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Application of supplementary Fee0
- Outcome
- root Fe concentrationse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of supplementary Fe corrected Fe deficiency in leaves of plants grown at 5mg L−1 Zn and reduced root Fe concentrations.”
t0“tomato”
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