Abstract
Abstract Increasing the tuber number per plant and promoting tuber formation are important goals for potato production. Thus, it is of significance to understand how environmental factors affect tuber formation, which relates to the development of agronomical practices. The objective of this research was to test whether changing the CO 2 or N supply level could alter the C : N ratio in potatoes, and whether a change of the C : N ratio in potatoes closely correlates with tuber formation in potato plants. Potato plantlets were grown in greenhouse with varied CO 2 or N levels. The C and N concentrations of plants were measured, and the tuber number and tuber weight were recorded after different growth times. The results show that the C : N ratios in the potato plants increased with increasing CO 2 concentration and that potato plants treated with higher CO 2 concentrations form tubers earlier. A decrease in the N supply also resulted in a higher C : N ratio and earlier tuber formation. Therefore the hypothesis proposed previously is supported by the present work. In addition, the results that C concentration in plants remained stable under different CO 2 or N levels imply that the variation of C : N ratio in the potato plants is mainly due to a change of N concentrations which decreased as the environmental CO 2 concentration increased, while increased as the N supply level increased.
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Claims 7
Claim · model-written summary
Higher CO2 concentration raised potato C : N ratios.
- Taxon
- potato plants
Solanum tuberosume0 - Treatment
- increasing CO 2 concentratione0
- Outcome
- C : N ratiose0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the C : N ratios in the potato plants increased with increasing CO 2 concentration”
Claim · model-written summary
Higher CO2 caused earlier potato tuber formation.
- Taxon
- potato plantsSolanum tuberosume0
- Treatment
- higher CO 2 concentrationse0
- Outcome
- form tuberse0
- Direction
- earliere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato plants treated with higher CO 2 concentrations form tubers earlier”
Claim · model-written summary
Lower N supply raised potato C : N ratio.
- Taxon
- potato plantsSolanum tuberosumt0
- Treatment
- decrease in the N supplye0
- Outcome
- C : N ratioe0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A decrease in the N supply also resulted in a higher C : N ratio”
t0“potato plants”
Claim · model-written summary
Lower N supply led to earlier tuber formation.
- Taxon
- potato plantsSolanum tuberosumt0
- Treatment
- decrease in the N supplye0
- Outcome
- tuber formatione0
- Direction
- earliere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A decrease in the N supply also resulted in a higher C : N ratio and earlier tuber formation”
t0“potato plants”
Claim · model-written summary
Plant C concentration stayed stable across CO2 and N levels.
- Taxon
- potato plantsSolanum tuberosumt0
- Treatment
- different CO 2 or N levelse0
- Outcome
- C concentration in plantse0
- Direction
- remained stablee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C concentration in plants remained stable under different CO 2 or N levels”
t0“potato plants”
Claim · model-written summary
Potato N concentration fell as environmental CO2 increased.
- Taxon
- potato plantsSolanum tuberosumt0
- Treatment
- environmental CO 2 concentration increasede0
- Outcome
- N concentrationse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N concentrations which decreased as the environmental CO 2 concentration increased”
t0“potato plants”
Claim · model-written summary
Potato N concentration rose as N supply increased.
- Taxon
- potato plantsSolanum tuberosumt0
- Treatment
- N supply level increasede0
- Outcome
- N concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N concentrations which decreased as the environmental CO 2 concentration increased, while increased as the N supply level increased”
t0“potato plants”
The same questions in other papers
nitrogen · molecular: metabolites · Solanum tuberosum (potato)Positive and negative results
6 papers in the same direction as this paper · 4 in the opposite direction
- negative
- positive
- positive
7 papers more in this group
See all 11 papers →co2 · molecular: metabolites · Solanum tuberosum (potato)Results agree
2 papers in the same direction as this paper
- no effect
- 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.