Abstract
Six varieties of Solanum tuberosum L potato grown in the Bolivian highlands under drought stress, with and without irrigation, were analysed for their content of glycoalkaloids (GAs). The plant material consisted of three drought-tolerant varieties from a local breeding programme (PROINPA), Potosina, Chapaquita and Pampeña, and three control cultivated varieties, Malcacho, Sani Imilla and Desiree, either susceptible or relatively tolerant to drought. α-Solanine and α-chaconine were quantified in both the peel and flesh of the tubers. A significant increase in GA concentration (α-solanine + α-chaconine) was observed under drought stress conditions in most varieties; average concentration increases of 43 and 50% were registered in the improved and control cultivars respectively. In all tested cultivars, however, the GA concentration remained lower than the recommended food safety level (200 mg kg−1 fresh tubers). It ranged from 52.4 to 100 mg kg−1 fresh tubers in the improved cultivars and from 55.6 to 122.3 mg kg−1 fresh tubers in the controls. In the improved and control varieties the α-solanine content averaged 42.6 and 35.4% of the total potato GAs respectively and was not significantly affected by drought stress, except in Desiree. In all conditions the peel contained the greatest proportion of total GAs. The hybrid variety Pampeña (new drought-tolerant variety) contained the lowest amounts of GAs, which were lower than those of the control varieties, with and without irrigation. © 2000 Society of Chemical Industry
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Claims 11
Claim · model-written summary
Drought significantly increased total tuber glycoalkaloid concentration in most varieties.
- Taxon
- Solanum tuberosum L
Solanum tuberosume1 - Treatment
- drought stress conditionse0
- Outcome
- GA concentration (α-solanine + α-chaconine)e0
- Direction
- increasee0
- Qualifier
- most varietiese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant increase in GA concentration (α-solanine + α-chaconine) was observed under drought stress conditions in most varieties”
e1“Six varieties of Solanum tuberosum L potato”
Claim · model-written summary
Improved cultivars averaged a 43% glycoalkaloid concentration increase under drought.
- Taxon
- Solanum tuberosum LSolanum tuberosume2
- Material
- improvede0
- Treatment
- drought stress conditionse1
- Outcome
- concentratione0
- Direction
- increasese0
- Value
- 43e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“average concentration increases of 43 and 50% were registered in the improved and control cultivars respectively”
e1“under drought stress conditions”
e2“Six varieties of Solanum tuberosum L potato”
Claim · model-written summary
Control cultivars averaged a 50% glycoalkaloid concentration increase under drought.
- Taxon
- Solanum tuberosum LSolanum tuberosume2
- Material
- control cultivarse0
- Treatment
- drought stress conditionse1
- Outcome
- concentratione0
- Direction
- increasese0
- Value
- 50%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“average concentration increases of 43 and 50% were registered in the improved and control cultivars respectively”
e1“under drought stress conditions”
e2“Six varieties of Solanum tuberosum L potato”
Claim · model-written summary
All tested cultivars stayed below the recommended food safety threshold for glycoalkaloids.
- Taxon
- Solanum tuberosum LSolanum tuberosume1
- Outcome
- GA concentratione0
- Direction
- lowere0
- Value
- 200 mg kg−1 fresh tuberse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In all tested cultivars, however, the GA concentration remained lower than the recommended food safety level (200 mg kg−1 fresh tubers)”
e1“Six varieties of Solanum tuberosum L potato”
Claim · model-written summary
Improved cultivars had glycoalkaloid concentrations of 52.4 to 100 mg kg−1 fresh tubers.
- Taxon
- Solanum tuberosum LSolanum tuberosume2
- Material
- improved cultivarse0
- Outcome
- GA concentratione1
- Value
- 52.4 to 100 mg kg−1 fresh tuberse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It ranged from 52.4 to 100 mg kg−1 fresh tubers in the improved cultivars”
e1“the GA concentration remained lower than the recommended food safety level”
e2“Six varieties of Solanum tuberosum L potato”
Claim · model-written summary
Control cultivars had glycoalkaloid concentrations of 55.6 to 122.3 mg kg−1 fresh tubers.
- Taxon
- Solanum tuberosum LSolanum tuberosume2
- Material
- controlse0
- Outcome
- GA concentratione1
- Value
- 55.6 to 122.3 mg kg−1 fresh tuberse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“from 55.6 to 122.3 mg kg−1 fresh tubers in the controls”
e1“the GA concentration remained lower than the recommended food safety level”
e2“Six varieties of Solanum tuberosum L potato”
Claim · model-written summary
α-Solanine averaged 42.6% of total potato glycoalkaloids in improved varieties.
- Taxon
- Solanum tuberosum LSolanum tuberosume1
- Material
- improvede0
- Outcome
- α-solanine contente0
- Value
- 42.6e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the improved and control varieties the α-solanine content averaged 42.6 and 35.4% of the total potato GAs respectively”
e1“Six varieties of Solanum tuberosum L potato”
Claim · model-written summary
α-Solanine averaged 35.4% of total potato glycoalkaloids in control varieties.
- Taxon
- Solanum tuberosum LSolanum tuberosume1
- Material
- control varietiese0
- Outcome
- α-solanine contente0
- Value
- 35.4%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the improved and control varieties the α-solanine content averaged 42.6 and 35.4% of the total potato GAs respectively”
e1“Six varieties of Solanum tuberosum L potato”
Claim · model-written summary
Drought did not significantly affect the α-solanine share except in Desiree.
- Taxon
- Solanum tuberosum LSolanum tuberosume2
- Material
- Desireee0
- Treatment
- drought stresse0
- Outcome
- α-solanine contente1
- Direction
- not significantly affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was not significantly affected by drought stress, except in Desiree”
e1“the α-solanine content”
e2“Six varieties of Solanum tuberosum L potato”
Claim · model-written summary
The peel held the greatest share of total glycoalkaloids in all conditions.
- Taxon
- Solanum tuberosum LSolanum tuberosume1
- Organ / stage
- peele0
- Outcome
- greatest proportion of total GAse0
- Direction
- greateste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In all conditions the peel contained the greatest proportion of total GAs”
e1“Six varieties of Solanum tuberosum L potato”
Claim · model-written summary
Pampeña had the lowest glycoalkaloid amounts, below the control varieties with and without irrigation.
- Taxon
- Solanum tuberosum LSolanum tuberosume1
- Material
- Pampeñae0
- Outcome
- amounts of GAse0
- Direction
- loweste0
- Qualifier
- with and without irrigatione0
- Comparator
- control varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The hybrid variety Pampeña (new drought-tolerant variety) contained the lowest amounts of GAs, which were lower than those of the control varieties, with and without irrigation”
e1“Six varieties of Solanum tuberosum L potato”
The same questions in other papers
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drought · molecular: metabolites · Solanum tuberosum (potato)Positive and negative results
7 papers in the same direction as this paper · 8 in the opposite direction
- positive
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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.