Abstract
ABSTRACT Tomato (Lycopersicon esculentum) cvs. “Blizzard”, “Liberto”, and “Calypso” were grown hydroponically in a controlled temperature (C.T.) room for five weeks. The objective was to investigate the effectiveness of foliar-applied phosphorus (P) and iron (Fe) (SPFe) sprayed to the leaves of seedlings grown at high (77 Âμmol L−1) zinc (Zn). Zinc concentrations added to nutrient solution were 7.7 or 77 Âμmol L−1. One week after application of root zone Zn at 77 Âμmol L−1, SPFe at 10 and 0.5 mmol L−1, respectively, were sprayed on the leaves of seedlings in high zinc treatment twice a week for three weeks. Significant reductions in dry weight, chlorophyll contents and daily water use were recorded for the seedlings grown at 77 Âμmol L−1 Zn compared with those at 7.7 Âμmol L−1 for all three cultivars. Membrane permeability (electrolyte leakage) increased in the seedlings grown at 77 Âμmol L−1 Zn compared to 7.7 Âμmol L−1. The SPFe as a foliar application led to significant increases in dry weight, chlorophyll concentrations and daily water use for all three cultivars. Membrane permeability, based on electrolyte leakage, impaired by high zinc was maintained with SPFe treatment. Leaf Zn increased to toxic levels for all three cultivars in the high Zn treatment. The SPFe lowered zinc concentrations in the leaves and roots of seedlings grown at high Zn, but concentrations of Zn were still at critical toxic levels. Leaf P and Fe declined to deficient levels in the high (77 Âμmol L−1) Zn treatment, but were significantly increased in the roots. SPFe corrected both P and Fe deficiencies in leaves of seedlings grown at 77 Âμmol L−1 Zn and reduced root P and Fe concentrations.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
High zinc reduced tomato seedling dry weight, chlorophyll contents and daily water use in all three cultivars.
- Taxon
- TOMATO
Solanum lycopersicumt0 - Treatment
- 77 Âμmol L−1 Zne0
- Outcome
- dry weight, chlorophyll contents and daily water usee0
- Direction
- reductionse0
- Comparator
- 7.7 Âμmol L−1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant reductions in dry weight, chlorophyll contents and daily water use were recorded for the seedlings grown at 77 Âμmol L−1 Zn compared with those at 7.7 Âμmol L−1 for all three cultivars.”
t0“TOMATO CULTIVARS”
Claim · model-written summary
High zinc increased membrane permeability in tomato seedlings.
- Taxon
- TOMATOSolanum lycopersicumt0
- Treatment
- 77 Âμmol L−1 Zne0
- Outcome
- Membrane permeability (electrolyte leakage)e0
- Direction
- increasede0
- Comparator
- 7.7 Âμmol L−1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Membrane permeability (electrolyte leakage) increased in the seedlings grown at 77 Âμmol L−1 Zn compared to 7.7 Âμmol L−1.”
t0“TOMATO CULTIVARS”
Claim · model-written summary
Foliar SPFe increased tomato seedling dry weight, chlorophyll concentrations and daily water use.
- Taxon
- TOMATOSolanum lycopersicumt0
- Treatment
- SPFe as a foliar applicatione0
- Outcome
- dry weight, chlorophyll concentrations and daily water usee0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The SPFe as a foliar application led to significant increases in dry weight, chlorophyll concentrations and daily water use for all three cultivars.”
t0“TOMATO CULTIVARS”
Claim · model-written summary
SPFe maintained membrane permeability under high zinc.
- Taxon
- TOMATOSolanum lycopersicumt0
- Treatment
- SPFe treatmente0
- Outcome
- Membrane permeabilitye0
- Direction
- maintainede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Membrane permeability, based on electrolyte leakage, impaired by high zinc was maintained with SPFe treatment.”
t0“TOMATO CULTIVARS”
Claim · model-written summary
High zinc raised tomato leaf zinc to toxic levels.
- Taxon
- TOMATOSolanum lycopersicumt0
- Treatment
- high Zn treatmente0
- Outcome
- Leaf Zne0
- Direction
- increasede0
- Qualifier
- toxic levelse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf Zn increased to toxic levels for all three cultivars in the high Zn treatment.”
t0“TOMATO CULTIVARS”
Claim · model-written summary
SPFe lowered zinc concentrations in tomato leaves and roots, although levels stayed toxic.
- Taxon
- TOMATOSolanum lycopersicumt0
- Treatment
- SPFee0
- Outcome
- zinc concentrations in the leaves and rootse0
- Direction
- lowerede0
- Qualifier
- still at critical toxic levelse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The SPFe lowered zinc concentrations in the leaves and roots of seedlings grown at high Zn, but concentrations of Zn were still at critical toxic levels.”
t0“TOMATO CULTIVARS”
Claim · model-written summary
High zinc lowered tomato leaf phosphorus and iron to deficiency levels.
- Taxon
- TOMATOSolanum lycopersicumt0
- Treatment
- high (77 Âμmol L−1) Zn treatmente0
- Outcome
- Leaf P and Fee0
- Direction
- declinede0
- Qualifier
- deficient levelse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf P and Fe declined to deficient levels in the high (77 Âμmol L−1) Zn treatment”
t0“TOMATO CULTIVARS”
Claim · model-written summary
High zinc increased tomato root phosphorus and iron.
- Taxon
- TOMATOSolanum lycopersicumt0
- Organ / stage
- rootse0
- Treatment
- high (77 Âμmol L−1) Zn treatmente1
- Outcome
- P and Fee1
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but were significantly increased in the roots.”
e1“Leaf P and Fe declined to deficient levels in the high (77 Âμmol L−1) Zn treatment”
t0“TOMATO CULTIVARS”
Claim · model-written summary
SPFe corrected tomato leaf phosphorus and iron deficiencies under high zinc.
- Taxon
- TOMATOSolanum lycopersicumt0
- Treatment
- SPFee0
- Outcome
- P and Fe deficiencies in leavese0
- Direction
- correctede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SPFe corrected both P and Fe deficiencies in leaves of seedlings grown at 77 Âμmol L−1 Zn”
t0“TOMATO CULTIVARS”
Claim · model-written summary
SPFe reduced tomato root phosphorus and iron concentrations.
- Taxon
- TOMATOSolanum lycopersicumt0
- Treatment
- SPFee1
- Outcome
- root P and Fe concentrationse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced root P and Fe concentrations.”
e1“SPFe corrected both P and Fe deficiencies in leaves of seedlings grown at 77 Âμmol L−1 Zn”
t0“TOMATO CULTIVARS”
The same questions in other papers
zinc atom · physiology: water · Solanum lycopersicum (tomato)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
zinc atom · physiology: oxidative · Solanum lycopersicum (tomato)Positive and negative results
8 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
7 papers more in this group
See all 11 papers →zinc atom · nutrient: content · Solanum lycopersicum (tomato)Positive and negative results
6 papers in the same direction as this paper · 15 in the opposite direction
- negative
- positive
- positive
18 papers more in this group
See all 22 papers →application · physiology: water · Solanum lycopersicum (tomato)Positive and negative results
12 papers in the same direction as this paper · 5 in the opposite direction
- negative
- negative
- negative
14 papers more in this group
See all 18 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.