Abstract
Potatoes are regarded as a significant antioxidant source in human nutrition. However, different types of environmental stress may affect the level of antioxidants in their tuber tissue. In this study, two purple breeding clones and the yellow fleshed cultivar (cv.) Agave were grown in the glasshouse under control with drought stress conditions for two consecutive years. After harvest, the tubers were analysed for concentrations of antioxidants measured as ascorbic acid equivalent (ACE) and trolox equivalent (TXE) in fresh tissue and after wounding. In addition, the peroxidase enzyme (POD) activities and total amounts of anthocyanins (Ac) were assayed. Drought stress caused a significant decrease in tuber yield but had no significant effect on Ac, POD, ACE and TXE. Wounding stress significantly induced the POD activity in control and drought stressed tubers of all genotypes. Also the ACE and TXE were notably increased by wounding in cv. Agave. This was less pronounced in the purple clones which in general displayed a higher level of antioxidants. The results revealed significant differences between genotypes and that the effect of drought stress on the level of antioxidants is smaller than that of wounding stress.
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Claims 8
Claim · model-written summary
Drought significantly decreased potato tuber yield.
- Taxon
- Potato
Solanum tuberosumt0 - Treatment
- Drought stresse0
- Outcome
- tuber yielde0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress caused a significant decrease in tuber yield”
t0“Potato”
Claim · model-written summary
Drought did not significantly affect tuber anthocyanins, peroxidase activity, ACE or TXE.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Droughte0
- Outcome
- Ac, POD, ACE and TXEe0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress caused a significant decrease in tuber yield but had no significant effect on Ac, POD, ACE and TXE”
t0“Potato”
Claim · model-written summary
Wounding significantly induced peroxidase activity in control and drought stressed tubers of all genotypes.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Wounding stresse0
- Outcome
- POD activitye0
- Direction
- inducede0
- Qualifier
- control and drought stressed tubers of all genotypese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wounding stress significantly induced the POD activity in control and drought stressed tubers of all genotypes”
t0“Potato”
Claim · model-written summary
Wounding notably increased ACE and TXE in cv. Agave.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- cv. Agavee0
- Treatment
- woundinge0
- Outcome
- ACE and TXEe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the ACE and TXE were notably increased by wounding in cv. Agave”
t0“Potato”
Claim · model-written summary
The wounding response was less pronounced in the purple clones.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- purple clonese0
- Outcome
- less pronouncede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This was less pronounced in the purple clones”
t0“Potato”
Claim · model-written summary
The purple clones generally had higher antioxidant levels.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- purple clonese0
- Outcome
- level of antioxidantse0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“purple clones which in general displayed a higher level of antioxidants”
t0“Potato”
Claim · model-written summary
Antioxidant levels differed significantly between genotypes.
- Taxon
- PotatoSolanum tuberosumt0
- Outcome
- differences between genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results revealed significant differences between genotypes”
t0“Potato”
Claim · model-written summary
Drought had a smaller effect on antioxidant levels than wounding.
- Taxon
- PotatoSolanum tuberosumt0
- Outcome
- level of antioxidantse0
- Direction
- smallere0
- Comparator
- wounding stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effect of drought stress on the level of antioxidants is smaller than that of wounding stress”
t0“Potato”
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See all 5 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.