Abstract
The effect of withholding Zn on the uptake, translocation and accumulation of P was studied in cotton plants ( Gossypium hirsutum L. cv. Deltapine 15/21) grown in nutrient solutions under controlled environmental conditions. The influence of P on the uptake rate, translocation and distribution of 65 Zn in the plants was also examined. Increasing the P supply resulted in severe Zn deficiency symptoms (interveinal chlorosis) as well as P toxicity symptoms, which were characterized by leaf puckering and grayish‐brown marginal necrosis. Zinc deficiency markedly increased the uptake and translocation rates of P over the whole concentration range tested (5x10 ‐5 to 1.25x10 ‐3 M ). Uptake and translocation rates of P increased with both level of P and severity of Zn deficiency. This often caused P toxicity symptoms on Zn‐deficient leaves. In contrast to P, the concentrations of K and Mg in the leaves were not affected by Zn deficiency. Similar results were obtained for sunflower ( Helianthus annuus L.) and buckwheat ( Fagopyrum esculentum Moench) plants. Higher P concentrations in Zn‐deficient leaves or shoots could not be attributed wholly to reduced shoot growth. This was also evident when Zn deficiency was compared with other micronutrient (Fe, Mn, and Cu) deficiencies. Only Zn‐deficient plants showed enhanced uptake and translocation of P. In experiments with 65 Zn, a high P supply did not depress uptake and translocation of Zn. From the results obtained it is concluded that the P‐induced Zn deficiency in cotton, as well as in other species, is primarily caused by enhanced P uptake and translocation and not by inhibition of Zn uptake.
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Claims 10
Claim · model-written summary
Higher phosphorus supply induced severe zinc deficiency and phosphorus toxicity symptoms.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- Increasing the P supplye0
- Outcome
- Zn deficiency symptoms (interveinal chlorosis) as well as P toxicity symptomse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the P supply resulted in severe Zn deficiency symptoms (interveinal chlorosis) as well as P toxicity symptoms”
t0“cotton”
Claim · model-written summary
Zinc deficiency increased phosphorus uptake and translocation rates.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Zinc deficiencye0
- Outcome
- uptake and translocation rates of Pe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc deficiency markedly increased the uptake and translocation rates of P over the whole concentration range tested”
t0“cotton”
Claim · model-written summary
Phosphorus uptake and translocation rates increased with phosphorus level and zinc deficiency severity.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- level of P and severity of Zn deficiencye0
- Outcome
- Uptake and translocation rates of Pe0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Uptake and translocation rates of P increased with both level of P and severity of Zn deficiency”
t0“cotton”
Claim · model-written summary
Zinc deficiency caused phosphorus toxicity symptoms on leaves.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- P toxicity symptomse0
- Qualifier
- Zn‐deficient leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This often caused P toxicity symptoms on Zn‐deficient leaves”
t0“cotton”
Claim · model-written summary
Zinc deficiency did not affect leaf potassium and magnesium concentrations.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Zn deficiencye0
- Outcome
- concentrations of K and Mg in the leavese0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“concentrations of K and Mg in the leaves were not affected by Zn deficiency”
t0“cotton”
Claim · model-written summary
Sunflower showed similar nutrient response results.
- Taxon
- sunflower
Helianthus annuuse0 - Outcome
- Similar resultse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Similar results were obtained for sunflower ( Helianthus annuus L.)”
Claim · model-written summary
Buckwheat showed similar nutrient response results.
Verbatim
e0“buckwheat ( Fagopyrum esculentum Moench) plants”
e1“Similar results were obtained for sunflower ( Helianthus annuus L.) and buckwheat ( Fagopyrum esculentum Moench) plants”
Claim · model-written summary
Only zinc deficient plants had enhanced phosphorus uptake and translocation among tested micronutrient deficiencies.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- uptake and translocation of Pe0
- Direction
- enhancede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only Zn‐deficient plants showed enhanced uptake and translocation of P”
t0“cotton”
Claim · model-written summary
High phosphorus supply did not depress zinc uptake and translocation.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- high P supplye0
- Outcome
- uptake and translocation of Zne0
- Direction
- did not depresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a high P supply did not depress uptake and translocation of Zn”
t0“cotton”
Claim · model-written summary
Authors concluded that phosphorus induced zinc deficiency primarily follows enhanced phosphorus uptake and translocation.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- P‐induced Zn deficiencye0
- Qualifier
- enhanced P uptake and translocatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P‐induced Zn deficiency in cotton, as well as in other species, is primarily caused by enhanced P uptake and translocation and not by inhibition of Zn uptake”
The same questions in other papers
zinc atom · nutrient: content · Gossypium hirsutum (cotton)Results differ
2 papers in the same direction as this paper · 13 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- positive
- positive
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See all 16 papers →phosphorus · nutrient: content · Gossypium hirsutum (cotton)Results differ
10 papers in the same direction as this paper · 22 in the opposite direction
- positive
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- positive
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See all 33 papers →phosphorus · physiology: pigments · Gossypium hirsutum (cotton)Positive and negative results
4 in the opposite direction
- positive
- positive
- positive
1 paper more in this group
See all 5 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.