Abstract
SummaryWorldwide, many people are zinc (Zn)-deficient. Dietary Zn intake can be increased by producing crops with higher concentrations of Zn in their edible portions. This can be achieved by applying Zn-fertilisers to varieties with an increased ability to acquire Zn and to accumulate Zn in their edible portions. Potato (Solanum tuberosum L.) is an important food crop and is, therefore, a target for bio-fortification with Zn. Field trials incorporating a core collection of 23 potato genotypes, performed over 4 years (2006 – 2009), indicated significant genotypic effects on tuber Zn concentration and suggested that tuber Zn concentration was influenced by environmental effects, but also found that genotype × environment (G × E) interactions were not significant. Tuber Zn concentrations averaged 10.8 mg kg–1 dry matter (DM), and the ratio between the lowest and the highest varietal tuber Zn-concentration averaged 1.76. Tuber Zn concentrations could be increased by foliar Zn-fertilisation. Tuber yields of ‘Maris Piper’ were unaffected by foliar applications of < 1.08 g Zn plant–1. The relationship between tuber Zn concentration and foliar Zn application followed a saturation curve, reaching a maximum at approx. 30 mg Zn kg–1 DM at a foliar Zn application rate of 1.08 g plant–1. Despite a 40-fold increase in shoot Zn concentration compared to the unfertilised controls following foliar Zn-fertilisation with 2.16 g Zn plant–1, only a doubling in tuber Zn concentration was observed. This suggests that the bio-fortification of tubers with Zn was restricted by the limited mobility of Zn in the phloem. A significant positive linear relationship between tuber Zn concentration and tuber N concentration supported the hypothesis of co-transport of Zn and N-compounds in the phloem.
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Claims 13
Claim · model-written summary
Potato genotype significantly affected tuber zinc concentration.
- Taxon
- potato
Solanum tuberosumt0 - Material
- genotypice0
- Outcome
- tuber Zn concentratione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant genotypic effects on tuber Zn concentration”
t0“potato”
Claim · model-written summary
Environment influenced tuber zinc concentration.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- tuber Zn concentratione0
- Setting
- environmentale0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tuber Zn concentration was influenced by environmental effects”
t0“potato”
Claim · model-written summary
Genotype by environment interaction for tuber zinc concentration was not significant.
- Taxon
- potatoSolanum tuberosumt0
- Material
- genotypee0
- Outcome
- genotype × environment (G × E) interactionse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“genotype × environment (G × E) interactions were not significant”
t0“potato”
Claim · model-written summary
Mean tuber zinc concentration was 10.8 mg kg–1 dry matter.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- Tuber Zn concentrationse0
- Value
- 10.8 mg kg–1 dry mattere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tuber Zn concentrations averaged 10.8 mg kg–1 dry matter (DM)”
t0“potato”
Claim · model-written summary
The average ratio of lowest to highest varietal tuber zinc concentration was 1.76.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- ratio between the lowest and the highest varietal tuber Zn-concentratione0
- Value
- 1.76e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ratio between the lowest and the highest varietal tuber Zn-concentration averaged 1.76”
t0“potato”
Claim · model-written summary
Foliar zinc fertilization increased tuber zinc concentration.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- foliar Zn-fertilisatione0
- Outcome
- Tuber Zn concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tuber Zn concentrations could be increased by foliar Zn-fertilisation”
t0“potato”
Claim · model-written summary
Foliar zinc below 1.08 g per plant did not significantly affect Maris Piper tuber yield.
- Taxon
- potatoSolanum tuberosumt0
- Material
- Maris Pipere0
- Treatment
- foliar applications of < 1.08 g Zn plant–1e0
- Outcome
- Tuber yieldse0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tuber yields of ‘Maris Piper’ were unaffected by foliar applications of < 1.08 g Zn plant–1”
t0“potato”
Claim · model-written summary
Tuber zinc concentration saturated near 30 mg Zn kg–1 DM at 1.08 g per plant foliar zinc.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- foliar Zn applicatione0
- Outcome
- tuber Zn concentratione0
- Direction
- maximume0
- Value
- approx. 30 mg Zn kg–1 DMe0
- Qualifier
- 1.08 g plant–1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“relationship between tuber Zn concentration and foliar Zn application followed a saturation curve, reaching a maximum at approx. 30 mg Zn kg–1 DM at a foliar Zn application rate of 1.08 g plant–1”
t0“potato”
Claim · model-written summary
Foliar zinc at 2.16 g per plant increased shoot zinc concentration fortyfold versus controls.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- foliar Zn-fertilisation with 2.16 g Zn plant–1e0
- Outcome
- shoot Zn concentratione0
- Direction
- increasee0
- Value
- 40-folde0
- Comparator
- unfertilised controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“40-fold increase in shoot Zn concentration compared to the unfertilised controls following foliar Zn-fertilisation with 2.16 g Zn plant–1”
t0“potato”
Claim · model-written summary
The same fertilization only doubled tuber zinc concentration.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- foliar Zn-fertilisation with 2.16 g Zn plant–1e0
- Outcome
- tuber Zn concentratione0
- Direction
- doublinge0
- Value
- doublinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar Zn-fertilisation with 2.16 g Zn plant–1, only a doubling in tuber Zn concentration was observed”
t0“potato”
Claim · model-written summary
Limited phloem mobility of zinc was proposed to restrict tuber zinc biofortification.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- bio-fortification of tubers with Zne0
- Direction
- restrictede0
- Qualifier
- limited mobility of Zn in the phloeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“bio-fortification of tubers with Zn was restricted by the limited mobility of Zn in the phloem”
t0“potato”
Claim · model-written summary
Tuber zinc concentration was significantly positively related to tuber nitrogen concentration.
- Taxon
- potatoSolanum tuberosumt0
- Compound
- tuber N concentratione0
- Outcome
- tuber Zn concentratione0
- Direction
- positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant positive linear relationship between tuber Zn concentration and tuber N concentration”
t0“potato”
Claim · model-written summary
The zinc and nitrogen association supports their co-transport in phloem.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- co-transport of Zn and N-compoundse0
- Qualifier
- in the phloeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“supported the hypothesis of co-transport of Zn and N-compounds in the phloem”
t0“potato”
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See all 46 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.