Abstract
Cytokinins (CKs) play important functions in plant growth and development and in response to adversity stress. However, little is known about the role CK plays in rice grain quality. We hypothesized that exogenous cytokinins could improve rice grain quality by regulating physiological traits and genes related to starch synthesis. Therefore, we exogenously applied different concentrations of kinetin (KT), an exogenous CK, during the grain-filling period. Our results show that all the different concentrations of exogenous KT treatments resulted in a significant increase in thousand-grain weight. In particular, chalkiness and chalky grain rate were significantly reduced, and gel consistency (GC) content and alkali spreading value (ASV) were significantly increased in 10−8 M KT treatment. Meanwhile, the exogenous application of 10−8 M KT positively affected the transcription of some starch synthesis-related genes, which was in contrast to the 10−5 M KT treatment. In conclusion, the exogenous application of appropriate concentrations of KT during the grain-filling period can ultimately affect rice grain quality by regulating the changes in the relevant indicators, such as appearance quality (AQ) and eating and cooking qualities (ECQ).
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Claims 4
Claim · model-written summary
All applied kinetin concentrations significantly increased thousand-grain weight.
- Taxon
- Rice
Oryza sativat0 - Treatment
- exogenous KT treatmentse0
- Outcome
- thousand-grain weighte0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all the different concentrations of exogenous KT treatments resulted in a significant increase in thousand-grain weight.”
t0“Rice”
Claim · model-written summary
The 10−8 M kinetin treatment significantly reduced chalkiness and chalky grain rate.
- Taxon
- RiceOryza sativat0
- Treatment
- 10−8 M KT treatmente0
- Outcome
- chalkiness and chalky grain ratee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chalkiness and chalky grain rate were significantly reduced, and gel consistency (GC) content and alkali spreading value (ASV) were significantly increased in 10−8 M KT treatment.”
t0“Rice”
Claim · model-written summary
The 10−8 M kinetin treatment significantly increased gel consistency content and alkali spreading value.
- Taxon
- RiceOryza sativat0
- Treatment
- 10−8 M KT treatmente0
- Outcome
- gel consistency (GC) content and alkali spreading value (ASV)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“gel consistency (GC) content and alkali spreading value (ASV) were significantly increased in 10−8 M KT treatment.”
t0“Rice”
Claim · model-written summary
The 10−8 M kinetin treatment positively affected transcription of starch synthesis genes relative to 10−5 M kinetin.
- Taxon
- RiceOryza sativat0
- Treatment
- 10−8 M KTe0
- Outcome
- transcription of some starch synthesis-related genese0
- Direction
- positively affectede0
- Comparator
- 10−5 M KT treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the exogenous application of 10−8 M KT positively affected the transcription of some starch synthesis-related genes, which was in contrast to the 10−5 M KT treatment.”
t0“Rice”
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