Abstract
The protective peel of potato tuber consists of periderm tissue, the outmost cell layers of which contain corky cell walls and are termed 'skin'. The skin protects the tuber from water loss and pathogen invasion, and its visual appearance is a highly important marketing factor. Physiological skin blemishes are of great concern, mainly russeting disorder and skinning injuries. We previously showed that application of calcium (Ca) reduces the rate and severity of skin russeting. Here, polyhalite fertilization was tested as an alternative source of Ca. The polyhalite mineral is a hydrated sulfate of potassium (K), Ca and magnesium (Mg), and thus contains additional important nutrients that may contribute to skin quality. Furthermore, in view of the direct interaction of soil mineral elements with the tuber skin, we tested application of polyhalite at the end of the growth period, assuming that providing the mineral at the last stages of skin development may enhance its quality. Accordingly, polyhalite was applied at three time points: pre-planting, in-season at around 3–4 weeks prior to haulm desiccation, and 2 days post-haulm desiccation. The experiments included several cultivars and locations. Data indicated that late application of polyhalite, after haulm desiccation, results in reduced concentrations of Ca and Mg and increased concentration of K in the tuber peel of fertilized plants compared to controls. Tuber appearance was improved, and the expression of FHT and CYP86A33, indicator genes for skin suberization, was significantly upregulated. Earlier applications of the polyhalite mineral did not alter mineral elements concentrations in the tuber peel compared to control plants. Overall, polyhalite fertilization positively affected tuber skin appearance and skin-related gene expression. However, the effect was moderate, and the mineral did not fully mitigate skin imperfections. The effect of polyhalite may be dependent on local conditions and cultivar type.
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Claims 8
Claim · model-written summary
Late polyhalite reduced calcium in tuber peel.
- Taxon
- Potato
Solanum tuberosumt0 - Treatment
- late application of polyhalite, after haulm desiccatione0
- Outcome
- concentrations of Cae0
- Direction
- reducede0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Tuber”
e0“late application of polyhalite, after haulm desiccation, results in reduced concentrations of Ca and Mg and increased concentration of K in the tuber peel of fertilized plants compared to controls”
Claim · model-written summary
Late polyhalite reduced magnesium in tuber peel.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- late application of polyhalite, after haulm desiccatione0
- Outcome
- Mge0
- Direction
- reducede0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Tuber”
e0“late application of polyhalite, after haulm desiccation, results in reduced concentrations of Ca and Mg and increased concentration of K in the tuber peel of fertilized plants compared to controls”
Claim · model-written summary
Late polyhalite increased potassium in tuber peel.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- late application of polyhalite, after haulm desiccatione0
- Outcome
- concentration of Ke0
- Direction
- increasede0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Tuber”
e0“late application of polyhalite, after haulm desiccation, results in reduced concentrations of Ca and Mg and increased concentration of K in the tuber peel of fertilized plants compared to controls”
Claim · model-written summary
Polyhalite improved tuber appearance.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Polyhalite Fertilizationt1
- Outcome
- Tuber appearancee0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Tuber”
t1“Polyhalite Fertilization on Skin Quality of Potato Tuber”
e0“Tuber appearance was improved”
Claim · model-written summary
Polyhalite significantly upregulated FHT.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Polyhalite Fertilizationt0
- Gene
- FHTe0
- Outcome
- expression of FHTe0
- Direction
- upregulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Polyhalite Fertilization on Skin Quality of Potato Tuber”
e0“the expression of FHT and CYP86A33, indicator genes for skin suberization, was significantly upregulated”
Claim · model-written summary
Polyhalite significantly upregulated CYP86A33.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Polyhalite Fertilizationt0
- Gene
- CYP86A33e0
- Outcome
- CYP86A33e0
- Direction
- upregulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Polyhalite Fertilization on Skin Quality of Potato Tuber”
e0“the expression of FHT and CYP86A33, indicator genes for skin suberization, was significantly upregulated”
Claim · model-written summary
Earlier polyhalite applications did not alter peel mineral concentrations.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Earlier applications of the polyhalite minerale0
- Outcome
- mineral elements concentrations in the tuber peele0
- Direction
- did not altere0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Polyhalite Fertilization on Skin Quality of Potato Tuber”
e0“Earlier applications of the polyhalite mineral did not alter mineral elements concentrations in the tuber peel compared to control plants”
Claim · model-written summary
Polyhalite did not fully mitigate skin imperfections.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Polyhalite Fertilizationt0
- Outcome
- skin imperfectionse0
- Direction
- did not fully mitigatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Polyhalite Fertilization on Skin Quality of Potato Tuber”
e0“the mineral did not fully mitigate skin imperfections”
The same questions in other papers
fertilization · molecular: expression · Solanum tuberosum (potato)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
drought · nutrient: content · Solanum tuberosum (potato)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- no effect
drought · molecular: metabolites · Solanum tuberosum (potato)Positive and negative results
7 papers in the same direction as this paper · 8 in the opposite direction
- negative
- negative
- negative
12 papers more in this group
See all 16 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.