Abstract
Abstract Decreasing soil water potential (minima of −0.3, −2.0 and −6.0 bars) reduced fruit number, set, and mean and total fruit weight of tomato ( Lycopersicon esculentum Mill). Under the 2 wettest soil water regimes, NH 4 -N compared to NO 3 -N fertilization reduced total and mean fruit weights but increased fruit number whereas no differences in these variables were found between N-forms under the driest regime. Incidence and severity of blossom-end rot (BER) were increased by NH 4 nutrition and by decreasing soil water potential (SWP). Decreasing SWP either had no effect or increased leaf Ca, Mg, and K concentrations but decreased fruit concentration of these ions. At any soil water regime, NH 4 fertilization decreased leaf Ca and Mg concentration but generally increased leaf K and fruit Ca, Mg, and K concentrations. While BER incidence and severity did not appear to be related to fruit Ca, Mg, and K concentration, the disorder was associated with increased stylar to calyx fruit-half concentration ratios of these ions. Basal (pre-dawn) leaf xylem pressure potential ( ψ p ) was unaffected by N nutrition but was greater (less negative) under the wettest regime. Compared to plants supplied with NO 3 -N whose minimal and mean light-saturation ψ p values decreased with decreasing SWP, plants given NH 4 -N reached a constant ψ p level regardless of soil water regime. Since leaf diffusive resistance (R L ) values increased with decreasing SWP, but were unaffected by N form, the lower transpiration and transpiration rates under NH 4 -N might be explained by increased non-leaf resistances to water flux and/or by reduced soil-plant water potential gradients.
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Claims 18
Claim · model-written summary
Decreasing soil water potential reduced fruit number, set, mean fruit weight, and total fruit weight.
- Taxon
- Tomato
Solanum lycopersicumt0 - Treatment
- Decreasing soil water potentiale0
- Outcome
- fruit number, set, and mean and total fruit weighte0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato1”
e0“Decreasing soil water potential (minima of −0.3, −2.0 and −6.0 bars) reduced fruit number, set, and mean and total fruit weight of tomato”
Claim · model-written summary
Under wetter regimes, NH 4 -N reduced total and mean fruit weights versus NO 3 -N.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- NH 4 -Ne0
- Outcome
- total and mean fruit weightse0
- Direction
- reducede0
- Qualifier
- 2 wettest soil water regimese0
- Comparator
- NO 3 -Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato1”
e0“Under the 2 wettest soil water regimes, NH 4 -N compared to NO 3 -N fertilization reduced total and mean fruit weights but increased fruit number”
Claim · model-written summary
Under wetter regimes, NH 4 -N increased fruit number versus NO 3 -N.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- NH 4 -Ne0
- Outcome
- fruit numbere0
- Direction
- increasede0
- Qualifier
- 2 wettest soil water regimese0
- Comparator
- NO 3 -Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato1”
e0“Under the 2 wettest soil water regimes, NH 4 -N compared to NO 3 -N fertilization reduced total and mean fruit weights but increased fruit number”
Claim · model-written summary
The nitrogen forms showed no differences in fruit weight or number under the driest regime.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- N-formse0
- Outcome
- these variablese0
- Direction
- no differencese0
- Qualifier
- driest regimee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato1”
e0“whereas no differences in these variables were found between N-forms under the driest regime”
Claim · model-written summary
NH 4 nutrition increased blossom-end rot incidence and severity.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- NH 4 nutritione0
- Outcome
- Incidence and severity of blossom-end rote0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato1”
e0“Incidence and severity of blossom-end rot (BER) were increased by NH 4 nutrition and by decreasing soil water potential (SWP).”
Claim · model-written summary
decreasing soil water potential increased blossom-end rot incidence and severity.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- decreasing soil water potentiale0
- Outcome
- Incidence and severity of blossom-end rote0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato1”
e0“Incidence and severity of blossom-end rot (BER) were increased by NH 4 nutrition and by decreasing soil water potential (SWP).”
Claim · model-written summary
Decreasing SWP increased leaf Ca, Mg, and K concentrations.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Decreasing SWPe0
- Outcome
- leaf Ca, Mg, and K concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato1”
e0“Decreasing SWP either had no effect or increased leaf Ca, Mg, and K concentrations but decreased fruit concentration of these ions.”
Claim · model-written summary
Decreasing SWP decreased fruit concentration of these ions.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Decreasing SWPe0
- Outcome
- fruit concentration of these ionse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato1”
e0“Decreasing SWP either had no effect or increased leaf Ca, Mg, and K concentrations but decreased fruit concentration of these ions.”
Claim · model-written summary
NH 4 fertilization decreased leaf Ca and Mg concentration.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- NH 4 fertilizatione0
- Outcome
- leaf Ca and Mg concentratione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato1”
e0“At any soil water regime, NH 4 fertilization decreased leaf Ca and Mg concentration but generally increased leaf K and fruit Ca, Mg, and K concentrations.”
Claim · model-written summary
NH 4 fertilization increased leaf K and fruit Ca, Mg, and K concentrations.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- NH 4 fertilizatione0
- Outcome
- leaf K and fruit Ca, Mg, and K concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato1”
e0“At any soil water regime, NH 4 fertilization decreased leaf Ca and Mg concentration but generally increased leaf K and fruit Ca, Mg, and K concentrations.”
Claim · model-written summary
Blossom-end rot was associated with higher stylar-to-calyx concentration ratios of Ca, Mg, and K.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- fruit-halfe0
- Outcome
- stylar to calyx fruit-half concentration ratiose0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato1”
e0“the disorder was associated with increased stylar to calyx fruit-half concentration ratios of these ions.”
Claim · model-written summary
Blossom-end rot incidence and severity did not appear related to fruit Ca, Mg, and K concentration.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- fruite0
- Outcome
- BER incidence and severitye0
- Direction
- did not appear to be relatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato1”
e0“BER incidence and severity did not appear to be related to fruit Ca, Mg, and K concentration”
Claim · model-written summary
Basal leaf xylem pressure potential was unaffected by nitrogen nutrition.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- N nutritione0
- Outcome
- leaf xylem pressure potentiale0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato1”
e0“Basal (pre-dawn) leaf xylem pressure potential ( ψ p ) was unaffected by N nutrition”
Claim · model-written summary
Basal leaf xylem pressure potential was greater under the wettest regime.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- wettest regimee0
- Outcome
- leaf xylem pressure potentiale0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato1”
e0“Basal (pre-dawn) leaf xylem pressure potential ( ψ p ) was unaffected by N nutrition but was greater (less negative) under the wettest regime.”
Claim · model-written summary
With NO 3 -N, minimal and mean light-saturation pressure potential declined as soil water potential decreased.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- decreasing SWPe0
- Outcome
- minimal and mean light-saturation ψ p valuese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato1”
e0“plants supplied with NO 3 -N whose minimal and mean light-saturation ψ p values decreased with decreasing SWP”
Claim · model-written summary
With NH 4 -N, pressure potential was constant across soil water regimes.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- NH 4 -Ne0
- Outcome
- ψ p levele0
- Direction
- constante0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato1”
e0“plants given NH 4 -N reached a constant ψ p level regardless of soil water regime”
Claim · model-written summary
Leaf diffusive resistance increased with decreasing soil water potential.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- decreasing SWPe0
- Outcome
- leaf diffusive resistancee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato1”
e0“leaf diffusive resistance (R L ) values increased with decreasing SWP”
Claim · model-written summary
Nitrogen form did not affect leaf diffusive resistance.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- N forme0
- Outcome
- leaf diffusive resistancee0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato1”
e0“leaf diffusive resistance (R L ) values increased with decreasing SWP, but were unaffected by N form”
The same questions in other papers
soil water · yield · Solanum lycopersicum (tomato)Results differ
7 papers in the same direction as this paper · 12 in the opposite direction
- positive
- positive
- positive
16 papers more in this group
See all 20 papers →soil water · disease · Solanum lycopersicum (tomato)Results agree
3 papers in the same direction as this paper
- negative
- no effect
- 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.