Abstract
Sweet potato (Ipomoea batatas L.) is a low production cost crop that is grown during almost the whole year, mainly in developing countries. In arid and semiarid regions, the presence of salinity and water stress can generate yield reductions and losses in the quality of the tuber roots. To address these issues, an experiment was performed to determine yield, N, P, K, Ca, Mg and Na uptake and proline content in plants belonging to two sweet potato cultivars with a different degree of salt tolerance, grown under three (0, 8 and 14 mmol NaCl) salt and two watering regimes (watering after two and four days), during summer-fall conditions of 2009. Salinity and watering frequencies were controlled by using the soilless culture technique. Both water and salt stresses reduced tuber root yields. The yield reduction is explained by a reduction in the uptake of N, P, K, Ca and Mg with the water stress treatment, and an increased Na uptake in the high salinity treatment. The salt and water stress adjustments were reflected in an increment in proline content in leaves and tuber roots. The results confirm the tolerant cultivar as a hardy variety adaptable to abiotic stresses, whereas the non-tolerant variety had lower yield and nutrient uptake. The results did not support the hypothesis that changes in proline content might be used as fast screening tools to discriminate between tolerant and susceptible sweet potato cultivars.
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Claims 9
Claim · model-written summary
Water stress reduced tuber root yield.
- Taxon
- Sweet potato
_Flower.jpg?width=60)
Ipomoea batatast0 - Treatment
- watere0
- Outcome
- tuber root yieldse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e0“Both water and salt stresses reduced tuber root yields.”
t0“SWEET POTATO PLANTS”
Claim · model-written summary
Salt stress reduced tuber root yield.
- Taxon
- Sweet potatoIpomoea batatast0
- Treatment
- salt stressese0
- Outcome
- tuber root yieldse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both water and salt stresses reduced tuber root yields.”
t0“SWEET POTATO PLANTS”
Claim · model-written summary
Water stress reduced uptake of nitrogen, phosphorus and potassium.
- Taxon
- Sweet potatoIpomoea batatast0
- Treatment
- water stress treatmente0
- Outcome
- uptake of N, P, Ke0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a reduction in the uptake of N, P, K, Ca and Mg with the water stress treatment”
t0“SWEET POTATO PLANTS”
Claim · model-written summary
Water stress reduced uptake of calcium and magnesium.
- Taxon
- Sweet potatoIpomoea batatast0
- Treatment
- water stress treatmente0
- Outcome
- Ca and Mge0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a reduction in the uptake of N, P, K, Ca and Mg with the water stress treatment”
t0“SWEET POTATO PLANTS”
Claim · model-written summary
High salinity increased sodium uptake.
- Taxon
- Sweet potatoIpomoea batatast0
- Treatment
- high salinity treatmente0
- Outcome
- Na uptakee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increased Na uptake in the high salinity treatment”
t0“SWEET POTATO PLANTS”
Claim · model-written summary
Salt and water stress increased proline content in leaves and tuber roots.
- Taxon
- Sweet potatoIpomoea batatast0
- Treatment
- salt and water stresse0
- Outcome
- proline content in leaves and tuber rootse0
- Direction
- incremente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The salt and water stress adjustments were reflected in an increment in proline content in leaves and tuber roots.”
t0“SWEET POTATO PLANTS”
Claim · model-written summary
The non-tolerant cultivar had lower yield than the tolerant cultivar.
- Taxon
- Sweet potatoIpomoea batatast0
- Material
- non-tolerant varietye0
- Outcome
- yielde0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the non-tolerant variety had lower yield and nutrient uptake”
t0“SWEET POTATO PLANTS”
Claim · model-written summary
The non-tolerant cultivar had lower nutrient uptake.
- Taxon
- Sweet potatoIpomoea batatast0
- Material
- non-tolerant varietye0
- Outcome
- nutrient uptakee0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the non-tolerant variety had lower yield and nutrient uptake”
t0“SWEET POTATO PLANTS”
Claim · model-written summary
Proline content changes did not discriminate tolerant and susceptible cultivars as a rapid screen.
- Taxon
- sweet potatoIpomoea batatase0
- Outcome
- fast screening tools to discriminate between tolerant and susceptible sweet potato cultivarse0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results did not support the hypothesis that changes in proline content might be used as fast screening tools to discriminate between tolerant and susceptible sweet potato cultivars.”
The same questions in other papers
salinity · nutrient: content · Ipomoea batatas (sweet potato)Results agree
2 papers in the same direction as this paper
- negative
- negative
salinity · yield · Ipomoea batatas (sweet potato)Results agree
2 papers in the same direction as this paper
- negative
- negative
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.