Abstract
Abstract Greenhouse studies with tomato plants as indicators have been carried out to study the influence of temperature upon occurrence of phosphorus‐induced zinc deficiency. The soils used were from areas in commercial potato fields where “fern leaf” and chlorosis due to Zn deficiency has been observed. The soils were found to be concurrently deficient in both P and Zn. Field soil treatments with Zn caused a marked improvement in growth. The effects of several rates of P, with and without Zn, upon tomato plant growth have been studied at 50, 60, 70 and 80F. Results on soil with moderately low (0.9 ppm) dithizone extractable Zn show P to induce Zn deficiency symptoms at 50 and 60F but not at 70 and 80F, although some growth differences attributable to Zn occurred at the higher temperatures. On soil from an acutely Zn deficient area (0.1 ppm Zn), P‐induced Zn deficiency was observed at all temperatures. Phosphorus applications were observed to reduce Zn concentration in the tissue while Zn applications tended to reduce P concentration. Stunted plants showing acute Zn deficiency symptoms had about the same Zn and P concentrations on the dry weight basis as did normal appearing plants grown at higher soil temperatures with the same P treatments.
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Claims 9
Claim · model-written summary
The sampled field soils were deficient in both phosphorus and zinc.
- Outcome
- deficient in both P and Zne0
Not reportedTaxon
Verbatim
e0“The soils were found to be concurrently deficient in both P and Zn.”
Claim · model-written summary
Field zinc treatment markedly improved potato growth.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- Zne0
- Outcome
- growthe0
- Direction
- improvemente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field soil treatments with Zn caused a marked improvement in growth.”
t0“commercial potato fields”
Claim · model-written summary
On moderately low-zinc soil, phosphorus induced tomato zinc-deficiency symptoms at 50 and 60F.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- Pe0
- Outcome
- Zn deficiency symptomse0
- Setting
- 50 and 60Fe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P to induce Zn deficiency symptoms at 50 and 60F but not at 70 and 80F”
t0“tomato plants as indicators”
Claim · model-written summary
On moderately low-zinc soil, phosphorus did not induce tomato zinc-deficiency symptoms at 70 and 80F.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Pe0
- Outcome
- Zn deficiency symptomse0
- Setting
- 70 and 80Fe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P to induce Zn deficiency symptoms at 50 and 60F but not at 70 and 80F”
t0“tomato plants as indicators”
Claim · model-written summary
Some tomato growth differences attributable to zinc occurred at higher temperatures.
- Taxon
- tomatoSolanum lycopersicumt0
- Compound
- Zne0
- Outcome
- growth differencese0
- Setting
- higher temperaturese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“some growth differences attributable to Zn occurred at the higher temperatures”
t0“tomato plants as indicators”
Claim · model-written summary
On acutely zinc-deficient soil, phosphorus induced zinc deficiency at all temperatures.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Pe0
- Outcome
- Zn deficiencye0
- Qualifier
- at all temperaturese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On soil from an acutely Zn deficient area (0.1 ppm Zn), P‐induced Zn deficiency was observed at all temperatures.”
t0“tomato plants as indicators”
Claim · model-written summary
Phosphorus applications reduced tomato tissue zinc concentration.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Phosphorus applicationse0
- Outcome
- Zn concentration in the tissuee0
- Direction
- reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus applications were observed to reduce Zn concentration in the tissue”
t0“tomato plants as indicators”
Claim · model-written summary
Zinc applications tended to reduce tomato tissue phosphorus concentration.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Zn applicationse0
- Outcome
- P concentratione0
- Direction
- reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zn applications tended to reduce P concentration.”
t0“tomato plants as indicators”
Claim · model-written summary
Acutely zinc-deficient stunted plants had about the same dry-weight zinc and phosphorus concentrations as normal plants at higher temperatures under the same phosphorus treatment.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- Zn and P concentrationse0
- Direction
- about the samee0
- Qualifier
- same P treatmentse0
- Comparator
- normal appearing plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stunted plants showing acute Zn deficiency symptoms had about the same Zn and P concentrations on the dry weight basis as did normal appearing plants grown at higher soil temperatures with the same P treatments.”
t0“tomato plants as indicators”
The same questions in other papers
zinc atom · growth · Solanum tuberosum (potato)Positive and negative results
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- no effect
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11 papers in the same direction as this paper · 26 in the opposite direction
- positive
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See all 38 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.