Abstract
The color of red potatoes is due to an accumulation of anthocyanins in periderm tissues. The objective of this study was to examine the effect of several factors on tuber redness. Using the red tuber-producing S. tuberosum ssp. tuberosum cultivar Norland, we observed that chroma (intensity of redness) and anthocyanin content of greenhouse-grown tubers decreased as tuber weight increased. There was a slight or no increase in hue (tint). We used HPLC to determine that pelargonidin and peonidin are the major anthocyanidins (aglycones of anthocyanins) in tuber periderm. The ratio of pelargonidin to peonidin increased as tuber weight increased up to 25 g fresh weight. The decrease in chroma was not due to an increase in cell sap pH; we observed a decrease in cellular pH as tuber weight increased. Controlled-atmosphere storage had no effect on tuber chroma or anthocyanin content compared to air storage. Methyl jasmonate, sucrose, or light treatment did not increase anthocyanin accumulation. Tubers exposed to light had less anthocyanin than those kept in the dark. We are examining the developmental expression of anthocyanin biosynthetic genes, as well as the effect of maize transcription factors on anthocyanin synthesis, in tuber periderm.
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Claims 11
Claim · model-written summary
Tuber chroma decreased with increasing weight.
- Taxon
- Solanum tuberosum
Solanum tuberosumt0 - Organ / stage
- tuberse0
- Outcome
- chroma (intensity of redness)e0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chroma (intensity of redness) and anthocyanin content of greenhouse-grown tubers decreased as tuber weight increased.”
t0“Solanum tuberosum”
Claim · model-written summary
Tuber anthocyanin content decreased with increasing weight.
- Taxon
- Solanum tuberosumSolanum tuberosumt0
- Organ / stage
- tuberse0
- Outcome
- anthocyanin contente0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chroma (intensity of redness) and anthocyanin content of greenhouse-grown tubers decreased as tuber weight increased.”
t0“Solanum tuberosum”
Claim · model-written summary
Tuber hue increased slightly or not at all.
- Taxon
- Solanum tuberosumSolanum tuberosumt0
- Outcome
- hue (tint)e0
- Direction
- slight or no increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a slight or no increase in hue (tint).”
t0“Solanum tuberosum”
Claim · model-written summary
Pelargonidin and peonidin were major tuber periderm anthocyanidins.
- Taxon
- Solanum tuberosumSolanum tuberosumt0
- Organ / stage
- tuber periderme0
- Outcome
- pelargonidin and peonidine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pelargonidin and peonidin are the major anthocyanidins (aglycones of anthocyanins) in tuber periderm.”
t0“Solanum tuberosum”
Claim · model-written summary
The pelargonidin to peonidin ratio increased with tuber weight up to 25 g.
- Taxon
- Solanum tuberosumSolanum tuberosumt0
- Organ / stage
- tubere0
- Outcome
- ratio of pelargonidin to peonidine0
- Direction
- increasede0
- Qualifier
- up to 25 g fresh weighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ratio of pelargonidin to peonidin increased as tuber weight increased up to 25 g fresh weight.”
t0“Solanum tuberosum”
Claim · model-written summary
Cellular pH decreased with tuber weight.
- Taxon
- Solanum tuberosumSolanum tuberosumt0
- Organ / stage
- tubere0
- Outcome
- cellular pHe0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we observed a decrease in cellular pH as tuber weight increased.”
t0“Solanum tuberosum”
Claim · model-written summary
Controlled-atmosphere storage did not alter chroma or anthocyanin content versus air storage.
- Taxon
- Solanum tuberosumSolanum tuberosumt0
- Treatment
- Controlled-atmosphere storagee0
- Outcome
- tuber chroma or anthocyanin contente0
- Direction
- no effecte0
- Comparator
- air storagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Controlled-atmosphere storage had no effect on tuber chroma or anthocyanin content compared to air storage.”
t0“Solanum tuberosum”
Claim · model-written summary
Methyl jasmonate did not increase anthocyanin accumulation.
- Taxon
- Solanum tuberosumSolanum tuberosumt0
- Treatment
- Methyl jasmonatee0
- Outcome
- anthocyanin accumulatione0
- Direction
- did not increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Methyl jasmonate, sucrose, or light treatment did not increase anthocyanin accumulation.”
t0“Solanum tuberosum”
Claim · model-written summary
Sucrose did not increase anthocyanin accumulation.
- Taxon
- Solanum tuberosumSolanum tuberosumt0
- Treatment
- sucrosee0
- Outcome
- anthocyanin accumulatione0
- Direction
- did not increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Methyl jasmonate, sucrose, or light treatment did not increase anthocyanin accumulation.”
t0“Solanum tuberosum”
Claim · model-written summary
Light did not increase anthocyanin accumulation.
- Taxon
- Solanum tuberosumSolanum tuberosumt0
- Treatment
- light treatmente0
- Outcome
- anthocyanin accumulatione0
- Direction
- did not increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Methyl jasmonate, sucrose, or light treatment did not increase anthocyanin accumulation.”
t0“Solanum tuberosum”
Claim · model-written summary
Light-exposed tubers had less anthocyanin than dark-kept tubers.
- Taxon
- Solanum tuberosumSolanum tuberosumt0
- Treatment
- exposed to lighte0
- Outcome
- anthocyanine0
- Direction
- lesse0
- Comparator
- kept in the darke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tubers exposed to light had less anthocyanin than those kept in the dark.”
t0“Solanum tuberosum”
The same questions in other papers
sucrose · quality: phytochemicals · Solanum tuberosum (potato)Results differ
1 in the opposite direction
- positive
(-)-methyl jasmonate · quality: phytochemicals · Solanum tuberosum (potato)Positive and negative results
1 in the opposite direction
- positive
light · quality: phytochemicals · Solanum tuberosum (potato)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
storage · quality: phytochemicals · Solanum tuberosum (potato)Positive and negative results
4 papers in the same direction as this paper · 5 reporting no difference from an alternative
- positive
- positive
- positive
6 papers more in this group
See all 10 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.