Abstract
Salinity, worsened by climate change, poses a significant challenge to rice cultivation, affecting both yield and nutritional quality. Black rice, known for its high antioxidant content, has not been thoroughly studied under salt stress and varying environmental conditions. This study investigates the effects of salinity and temperature on black rice (variety-Asamurasaki) and white rice (variety-Hitomebore) through pot experiments and three years of field trials. The results show that salt stress negatively impacts grain yield in both varieties, with notable varietal differences in nutritional quality. Salt stress increased total phenolic, flavonoid, and anthocyanin contents in black rice, whereas white rice showed no such changes. Black rice also exhibited enhanced levels of crude protein, zinc, and iron. In the pot experiment, salt stress improved grain color parameters, enhancing black rice’s appearance. However, high temperatures caused brown spots on the grains, reducing the benefits of salt stress on appearance and nutritional content. While salt stress can improve black rice’s nutritional value, temperature management is crucial for optimal grain quality. Further research is needed to explore interactions with different black rice varieties.
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Claims 8
Claim · model-written summary
Salt stress negatively impacts grain yield in both rice varieties.
- Taxon
- rice
Oryza sativae0 - Treatment
- salt stresse1
- Outcome
- grain yielde1
- Direction
- negatively impactse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity, worsened by climate change, poses a significant challenge to rice cultivation”
e1“The results show that salt stress negatively impacts grain yield in both varieties”
Claim · model-written summary
Salt stress increased total phenolic, flavonoid and anthocyanin contents in black rice, whereas white rice showed no such change.
Verbatim
e2“Salt stress increased total phenolic, flavonoid, and anthocyanin contents in black rice, whereas white rice showed no such changes”
Claim · model-written summary
White rice showed no change in total phenolic, flavonoid and anthocyanin contents under salt stress.
- Taxon
- white ricee2
- Treatment
- Salt stresse2
- Outcome
- total phenolic, flavonoid, and anthocyanin contentse2
- Direction
- no such changese2
Not reportedComparator
Verbatim
e2“Salt stress increased total phenolic, flavonoid, and anthocyanin contents in black rice, whereas white rice showed no such changes”
Claim · model-written summary
Black rice had enhanced crude protein, zinc and iron levels.
Verbatim
e0“Salinity, worsened by climate change, poses a significant challenge to rice cultivation”
e3“Black rice also exhibited enhanced levels of crude protein, zinc, and iron”
Claim · model-written summary
In the pot experiment, salt stress improved grain colour parameters of black rice.
- Taxon
- black ricee4
- Treatment
- salt stresse4
- Outcome
- grain color parameterse4
- Direction
- improvede4
- Setting
- pot experimente4
Not reportedComparator
Verbatim
e0“Salinity, worsened by climate change, poses a significant challenge to rice cultivation”
e4“In the pot experiment, salt stress improved grain color parameters, enhancing black rice’s appearance”
Claim · model-written summary
High temperatures caused brown spots on the grains of rice.
- Taxon
- riceOryza sativae0
- Treatment
- high temperaturese5
- Outcome
- brown spots on the grainse5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity, worsened by climate change, poses a significant challenge to rice cultivation”
e5“However, high temperatures caused brown spots on the grains, reducing the benefits of salt stress on appearance and nutritional content”
Claim · model-written summary
High temperatures reduced the benefits of salt stress on appearance and nutritional content.
- Taxon
- riceOryza sativae0
- Treatment
- high temperaturese5
- Outcome
- benefits of salt stress on appearance and nutritional contente5
- Direction
- reducinge5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity, worsened by climate change, poses a significant challenge to rice cultivation”
e5“However, high temperatures caused brown spots on the grains, reducing the benefits of salt stress on appearance and nutritional content”
Claim · model-written summary
The authors recommend temperature management for optimal grain quality of rice.
- Taxon
- riceOryza sativae0
- Outcome
- temperature managemente6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity, worsened by climate change, poses a significant challenge to rice cultivation”
e6“temperature management is crucial for optimal grain quality”
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See all 167 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.