Abstract
Potato is considered to have a low phosphorus (P) efficiency compared to other crops. Therefore, P fertilization requirements are high. New cultivars with improved P efficiency may contribute to save limited mineral P sources and to reduce eutrophication of surface water bodies. The present study aims to characterize the P efficiency of different potato genotypes and to identify mechanisms that improve P efficiency in cultivated potato. A diversity set of 32 potato accessions was used to assess their P efficiency. From this set, five cultivars were selected and two pot experiments with different P-fertilization strategies including a non-fertilized control were conducted to estimate effects of P deficiency on general agronomic and P related traits, root development, phosphatase activity and micro RNA 399 (miR399) expression. Significant differences between the 32 genotypes were found for P utilization efficiency (PUtE). P acquisition efficiency (PAE) as P content in low P in relation to P content in high P was positively correlated to relative biomass production while PUtE was not. Selected genotypes displayed a strong relation between total root length and P content. Root phosphatase activity and miR399 expression increased under P deficiency. However, tuber yields of four cultivars, grown on a soil with suboptimal content of plant available P, were not significantly affected in comparison to yields of well-fertilized plots. We conclude from the present study that PUtE and PAE are important traits when selecting for plants requiring less fertilizer inputs but PAE might be more important for cropping on deficient soils. A large root system might be the most important trait for P acquisition on such soils and therefore in breeding for P efficient crops. Lowering P fertilizer inputs might not necessarily reduce tuber yields.
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Claims 10
Claim · model-written summary
The 32 potato genotypes differed significantly in phosphorus utilization efficiency.
- Taxon
- potato
Solanum tuberosume1 - Material
- 32 genotypese0
- Outcome
- P utilization efficiency (PUtE)e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant differences between the 32 genotypes were found for P utilization efficiency (PUtE)”
e1“potato genotypes”
Claim · model-written summary
Phosphorus acquisition efficiency correlated positively with relative biomass production.
- Taxon
- potatoSolanum tuberosume1
- Outcome
- relative biomass productione0
- Direction
- positively correlatede0
- Comparator
- P acquisition efficiency (PAE)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P acquisition efficiency (PAE) as P content in low P in relation to P content in high P was positively correlated to relative biomass production”
e1“potato genotypes”
Claim · model-written summary
Phosphorus utilization efficiency did not correlate with relative biomass production.
- Taxon
- potatoSolanum tuberosume1
- Outcome
- relative biomass productione0
- Direction
- note0
- Comparator
- PUtEe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“relative biomass production while PUtE was not”
e1“potato genotypes”
Claim · model-written summary
Total root length was strongly related to phosphorus content in selected genotypes.
- Taxon
- potatoSolanum tuberosume1
- Material
- Selected genotypese0
- Organ / stage
- total root lengthe0
- Outcome
- P contente0
- Direction
- strong relatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Selected genotypes displayed a strong relation between total root length and P content”
e1“potato genotypes”
Claim · model-written summary
Root phosphatase activity increased under phosphorus deficiency.
- Taxon
- potatoSolanum tuberosume1
- Organ / stage
- Roote0
- Treatment
- P deficiencye0
- Outcome
- Root phosphatase activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root phosphatase activity and miR399 expression increased under P deficiency”
e1“potato genotypes”
Claim · model-written summary
miR399 expression increased under phosphorus deficiency.
- Taxon
- potatoSolanum tuberosume1
- Treatment
- P deficiencye0
- Gene
- miR399e0
- Outcome
- miR399 expressione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root phosphatase activity and miR399 expression increased under P deficiency”
e1“potato genotypes”
Claim · model-written summary
Tuber yields of four cultivars under suboptimal phosphorus were not significantly different from well-fertilized plots.
- Taxon
- potatoSolanum tuberosume1
- Material
- four cultivarse0
- Organ / stage
- tubere0
- Treatment
- soil with suboptimal content of plant available Pe0
- Outcome
- tuber yieldse0
- Direction
- not significantly affectede0
- Comparator
- well-fertilized plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tuber yields of four cultivars, grown on a soil with suboptimal content of plant available P, were not significantly affected in comparison to yields of well-fertilized plots”
e1“potato genotypes”
Claim · model-written summary
The authors consider PAE more important than PUtE for cropping on phosphorus-deficient soils.
- Taxon
- potatoSolanum tuberosume1
- Outcome
- cropping on deficient soilse0
- Qualifier
- might be more importante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PAE might be more important for cropping on deficient soils”
e1“potato genotypes”
Claim · model-written summary
A large root system may be the most important trait for phosphorus acquisition and breeding phosphorus-efficient crops.
- Taxon
- potatoSolanum tuberosume1
- Organ / stage
- root systeme0
- Outcome
- P acquisitione0
- Qualifier
- might be the most important traite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A large root system might be the most important trait for P acquisition on such soils and therefore in breeding for P efficient crops”
e1“potato genotypes”
Claim · model-written summary
Reducing phosphorus fertilizer inputs may leave tuber yields unchanged.
- Taxon
- potatoSolanum tuberosume1
- Treatment
- Lowering P fertilizer inputse0
- Outcome
- tuber yieldse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lowering P fertilizer inputs might not necessarily reduce tuber yields”
e1“potato genotypes”
The same questions in other papers
phosphorus · soil: biology · Solanum tuberosum (potato)Results agree
1 paper in the same direction as this paper
This paper is about lacking the nutrient, so it counts the other way round here.
- no effect
phosphorus · molecular: expression · Solanum tuberosum (potato)Results agree
1 paper in the same direction as this paper
This paper is about lacking the nutrient, so it counts the other way round here.
- no effect
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.