Abstract
Increasing plant P supply has been shown to either increase or decrease the salt tolerance of many plants. Tomato plants ( Lycopersicon esculentum Mill.) were grown in a greenhouse in a continuously flowing solution culture system to investigate whether P fertilization modified the detrimental effects of NaCl at low constant P concentrations similar to those in soil solutions. Increasing P fertilization enhanced the tolerance of tomato plants to NaCl. At 0.1, 1.0, and 10 m M P, the NaCl concentrations that reduced yields of fruit by 50% were 58,72, and 130 m M , respectively. Salinity reduced foliar P concentrations. This may have been mediated partly through ionic strength effects, which decreased the activity of H 2 PO 4 −1 by about 40%. Plants grown under saline conditions had higher internal P requirements. When the NaCl concentration was increased from 10 to 50 and 100 m M , the corresponding concentrations of P in the youngest mature leaf required to obtain 50% yield were increased from 1.8 to 2.4 and 3.0 g kg −1 . The change in internal P requirement was also evident by the relative severity of foliar symptoms of P deficiency in plants growing in the saline treatments at any given foliar P concentration. Adequate P nutrition was essential for effective ionic compartmentation. Under saline conditions, increasing the solution P concentration from 1.0 to 10 μ M decreased Na and increased K concentrations in immature leaves but increased Na and decreased K in the mature leaves. Accumulation of ions for osmotic adjustment and restriction of Na and Cl accumulation in immature leaves appear to be involved in P enhancement of salt tolerance of tomato plants.
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Claims 14
Claim · model-written summary
Increasing P fertilization enhanced tomato tolerance to NaCl.
- Taxon
- tomato plants
Solanum lycopersicume0 - Treatment
- Increasing P fertilizatione0
- Outcome
- tolerance of tomato plants to NaCle0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing P fertilization enhanced the tolerance of tomato plants to NaCl.”
Claim · model-written summary
At 0.1 m M P, 58 m M NaCl reduced fruit yield by 50%.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- 0.1e0
- Outcome
- yields of fruite0
- Direction
- reducede0
- Value
- 58e0
- Qualifier
- by 50%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 0.1, 1.0, and 10 m M P, the NaCl concentrations that reduced yields of fruit by 50% were 58,72, and 130 m M , respectively.”
t0“Tomato”
Claim · model-written summary
At 1.0 m M P, 72 m M NaCl reduced fruit yield by 50%.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- 1.0e0
- Outcome
- yields of fruite0
- Direction
- reducede0
- Value
- 72e0
- Qualifier
- by 50%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 0.1, 1.0, and 10 m M P, the NaCl concentrations that reduced yields of fruit by 50% were 58,72, and 130 m M , respectively.”
t0“Tomato”
Claim · model-written summary
At 10 m M P, 130 m M NaCl reduced fruit yield by 50%.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- 10e0
- Outcome
- yields of fruite0
- Direction
- reducede0
- Value
- 130e0
- Qualifier
- by 50%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 0.1, 1.0, and 10 m M P, the NaCl concentrations that reduced yields of fruit by 50% were 58,72, and 130 m M , respectively.”
t0“Tomato”
Claim · model-written summary
Salinity reduced foliar P concentrations in tomato.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Salinitye0
- Outcome
- foliar P concentrationse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity reduced foliar P concentrations.”
t0“Tomato”
Claim · model-written summary
Ionic strength effects decreased H 2 PO 4 −1 activity by about 40%.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- activity of H 2 PO 4 −1e0
- Direction
- decreasede0
- Value
- about 40%e0
- Qualifier
- ionic strength effectse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This may have been mediated partly through ionic strength effects, which decreased the activity of H 2 PO 4 −1 by about 40%.”
t0“Tomato”
Claim · model-written summary
Tomato grown under saline conditions had higher internal P requirements.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- saline conditionse0
- Outcome
- internal P requirementse0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants grown under saline conditions had higher internal P requirements.”
t0“Tomato”
Claim · model-written summary
At 10 m M NaCl, tomato required 1.8 g kg −1 leaf P for 50% yield.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- youngest mature leafe0
- Treatment
- 10e0
- Outcome
- concentrations of P in the youngest mature leaf required to obtain 50% yielde0
- Direction
- increasede0
- Value
- 1.8e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the NaCl concentration was increased from 10 to 50 and 100 m M , the corresponding concentrations of P in the youngest mature leaf required to obtain 50% yield were increased from 1.8 to 2.4 and 3.0 g kg −1 .”
t0“Tomato”
Claim · model-written summary
At 50 m M NaCl, tomato required 2.4 g kg −1 leaf P for 50% yield.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- youngest mature leafe0
- Treatment
- 50e0
- Outcome
- concentrations of P in the youngest mature leaf required to obtain 50% yielde0
- Direction
- increasede0
- Value
- 2.4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the NaCl concentration was increased from 10 to 50 and 100 m M , the corresponding concentrations of P in the youngest mature leaf required to obtain 50% yield were increased from 1.8 to 2.4 and 3.0 g kg −1 .”
t0“Tomato”
Claim · model-written summary
At 100 m M NaCl, tomato required 3.0 g kg −1 leaf P for 50% yield.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- youngest mature leafe0
- Treatment
- 100e0
- Outcome
- concentrations of P in the youngest mature leaf required to obtain 50% yielde0
- Direction
- increasede0
- Value
- 3.0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the NaCl concentration was increased from 10 to 50 and 100 m M , the corresponding concentrations of P in the youngest mature leaf required to obtain 50% yield were increased from 1.8 to 2.4 and 3.0 g kg −1 .”
t0“Tomato”
Claim · model-written summary
Under salinity, raising solution P from 1.0 to 10 μ M decreased Na in immature leaves.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- immature leavese0
- Treatment
- increasing the solution P concentration from 1.0 to 10 μ Me0
- Outcome
- Nae0
- Direction
- decreasede0
- Comparator
- 1.0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under saline conditions, increasing the solution P concentration from 1.0 to 10 μ M decreased Na and increased K concentrations in immature leaves but increased Na and decreased K in the mature leaves.”
t0“Tomato”
Claim · model-written summary
Under salinity, raising solution P from 1.0 to 10 μ M increased K in immature leaves.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- immature leavese0
- Treatment
- increasing the solution P concentration from 1.0 to 10 μ Me0
- Outcome
- K concentrationse0
- Direction
- increasede0
- Comparator
- 1.0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under saline conditions, increasing the solution P concentration from 1.0 to 10 μ M decreased Na and increased K concentrations in immature leaves but increased Na and decreased K in the mature leaves.”
t0“Tomato”
Claim · model-written summary
Under salinity, raising solution P from 1.0 to 10 μ M increased Na in mature leaves.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- mature leavese0
- Treatment
- increasing the solution P concentration from 1.0 to 10 μ Me0
- Outcome
- Nae0
- Direction
- increasede0
- Comparator
- 1.0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under saline conditions, increasing the solution P concentration from 1.0 to 10 μ M decreased Na and increased K concentrations in immature leaves but increased Na and decreased K in the mature leaves.”
t0“Tomato”
Claim · model-written summary
Under salinity, raising solution P from 1.0 to 10 μ M decreased K in mature leaves.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- mature leavese0
- Treatment
- increasing the solution P concentration from 1.0 to 10 μ Me0
- Outcome
- K concentrationse0
- Direction
- decreasede0
- Comparator
- 1.0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under saline conditions, increasing the solution P concentration from 1.0 to 10 μ M decreased Na and increased K concentrations in immature leaves but increased Na and decreased K in the mature leaves.”
t0“Tomato”
The same questions in other papers
salinity · nutrient: content · Solanum lycopersicum (tomato)Positive and negative results
57 papers in the same direction as this paper · 8 in the opposite direction
- no effect
- negative
- positive
62 papers more in this group
See all 66 papers →fertilization · disease · Solanum lycopersicum (tomato)Positive and negative results
93 papers in the same direction as this paper · 17 in the opposite direction
- no effect
- negative
- negative
107 papers more in this group
See all 111 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.