Abstract
Variations in antioxidant compounds were examined in seedlings of two rice cultivars (Qiutianxiaoting and 93-11) exposed to low temperature (4°C) for 0, 12, 36, and 48 h. Antioxidant activity was identified by 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) assays. The concentrations of total phenols, flavonoids, chlorophyll, and anthocyanins (ACNs) were determined by spectrophotometry. In addition, high-performance liquid chromatography (HPLC) was used to reveal the changes in phenolic compound concentrations in rice seedlings under chilling treatment. Results showed that antioxidant concentrations and antioxidant activity after chilling treatment were higher in 93-11 compared to Qiutianxiaoting, reaching the highest level at 36 h chilling treatment in 93-11. Phenolic compounds in Qiutianxiaoting decreased between 12 and 36 h but then increased at 48 h, whereas the corresponding levels in 93-11 increased as chilling time increased. Moreover, 10 phenolic compounds were detected and quantified by HPLC, of which gallic acid and caffeic acid tended to only exist in 93-11, whereas rutin was observed only in Qiutianxiaoting. The results of this study could be leveraged to optimize the antioxidant potential of rice in the context of healthy food choices.
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Claims 8
Claim · model-written summary
After chilling, antioxidant concentrations and activity were higher in cultivar 93-11 than in Qiutianxiaoting.
- Taxon
- rice
Oryza sativat0 - Material
- 93-11e1
- Treatment
- chilling treatmente1
- Outcome
- antioxidant concentrations and antioxidant activitye1
- Direction
- highere1
- Comparator
- Qiutianxiaotinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Two Rice Cultivars Under Chilling Treatment”
e1“Results showed that antioxidant concentrations and antioxidant activity after chilling treatment were higher in 93-11 compared to Qiutianxiaoting, reaching the highest level at 36 h chilling treatment in 93-11”
Claim · model-written summary
Cultivar 93-11 reached the highest antioxidant concentrations and activity at 36 h of chilling treatment.
- Taxon
- riceOryza sativat0
- Material
- 93-11e1
- Treatment
- 36 h chilling treatmente1
- Outcome
- antioxidant concentrations and antioxidant activitye1
- Direction
- higheste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Two Rice Cultivars Under Chilling Treatment”
e1“Results showed that antioxidant concentrations and antioxidant activity after chilling treatment were higher in 93-11 compared to Qiutianxiaoting, reaching the highest level at 36 h chilling treatment in 93-11”
Claim · model-written summary
Phenolic compounds in Qiutianxiaoting decreased between 12 and 36 h of chilling.
- Taxon
- riceOryza sativat0
- Material
- Qiutianxiaotinge2
- Treatment
- between 12 and 36 he2
- Outcome
- phenolic compoundse2
- Direction
- decreasede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Two Rice Cultivars Under Chilling Treatment”
e2“Phenolic compounds in Qiutianxiaoting decreased between 12 and 36 h but then increased at 48 h, whereas the corresponding levels in 93-11 increased as chilling time increased”
Claim · model-written summary
Phenolic compounds in Qiutianxiaoting increased at 48 h of chilling.
- Taxon
- riceOryza sativat0
- Material
- Qiutianxiaotinge2
- Treatment
- 48 he2
- Outcome
- phenolic compoundse2
- Direction
- increasede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Two Rice Cultivars Under Chilling Treatment”
e2“Phenolic compounds in Qiutianxiaoting decreased between 12 and 36 h but then increased at 48 h, whereas the corresponding levels in 93-11 increased as chilling time increased”
Claim · model-written summary
Phenolic levels in 93-11 increased as chilling time increased.
- Taxon
- riceOryza sativat0
- Material
- 93-11e2
- Treatment
- chilling timee2
- Outcome
- the corresponding levelse2
- Direction
- increasede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Two Rice Cultivars Under Chilling Treatment”
e2“Phenolic compounds in Qiutianxiaoting decreased between 12 and 36 h but then increased at 48 h, whereas the corresponding levels in 93-11 increased as chilling time increased”
Claim · model-written summary
Ten phenolic compounds were detected and quantified by HPLC in rice seedlings under chilling.
- Taxon
- riceOryza sativat0
- Outcome
- phenolic compounds were detected and quantified by HPLCe3
- Value
- 10e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Two Rice Cultivars Under Chilling Treatment”
e3“Moreover, 10 phenolic compounds were detected and quantified by HPLC, of which gallic acid and caffeic acid tended to only exist in 93-11, whereas rutin was observed only in Qiutianxiaoting”
Claim · model-written summary
Gallic acid and caffeic acid tended to occur only in 93-11.
- Taxon
- riceOryza sativat0
- Material
- 93-11e3
- Outcome
- gallic acid and caffeic acide3
- Qualifier
- tended to only existe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Two Rice Cultivars Under Chilling Treatment”
e3“Moreover, 10 phenolic compounds were detected and quantified by HPLC, of which gallic acid and caffeic acid tended to only exist in 93-11, whereas rutin was observed only in Qiutianxiaoting”
Claim · model-written summary
Rutin was observed only in Qiutianxiaoting.
- Taxon
- riceOryza sativat0
- Material
- Qiutianxiaotinge3
- Outcome
- rutine3
- Qualifier
- observed onlye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Two Rice Cultivars Under Chilling Treatment”
e3“Moreover, 10 phenolic compounds were detected and quantified by HPLC, of which gallic acid and caffeic acid tended to only exist in 93-11, whereas rutin was observed only in Qiutianxiaoting”
The same questions in other papers
cold · quality: phytochemicals · Oryza sativa (rice)Positive and negative results
7 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
5 papers more in this group
See all 9 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.