Abstract
The pH, polyphenol content and polyphenol oxidase (PPO) activity in stem end, middle, and bud end of Norin No. 1 potatoes, one of processing varieties in Japan, were measured to investigate their respective distributions.The stem end area had a higher pH and PPO activity in the three areas.This result points out that careful harvesting and postharvest handling are needed especially at the stem end area of potatoes because of its high PPO activity.Key words distribution, potato tuber, pH, polyphenol, polyphenol oxidase Blackspot bruise in potato (Solanum tuberosum L.) is an internal discoloration of tuber tissue caused by a sequence of biochemical oxidation which is initiated by a mechanical injury which occurs during mechanical harvesting, transport and storage.Blackspot bruise is
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Claims 3
Claim · model-written summary
The stem end had higher pH than middle and bud end areas.
- Taxon
- potatoes
Solanum tuberosume0 - Organ / stage
- stem end areae1
- Outcome
- pHe1
- Direction
- highere1
- Comparator
- the three arease1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Norin No. 1 potatoes”
e1“The stem end area had a higher pH and PPO activity in the three areas.”
Claim · model-written summary
The stem end had higher PPO activity than middle and bud end areas.
- Taxon
- potatoesSolanum tuberosume0
- Organ / stage
- stem end areae1
- Outcome
- PPO activitye1
- Direction
- highere1
- Comparator
- the three arease1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Norin No. 1 potatoes”
e1“The stem end area had a higher pH and PPO activity in the three areas.”
Claim · model-written summary
The authors advise careful harvesting and postharvest handling especially at the stem end.
- Taxon
- potatoesSolanum tuberosume1
- Organ / stage
- stem end areae1
- Outcome
- careful harvesting and postharvest handlinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Norin No. 1 potatoes”
e1“careful harvesting and postharvest handling are needed especially at the stem end area of potatoes because of its high PPO activity”