Abstract
Abstract Chitooligosaccharides (COS) are multi-functional foods and nutrients and environmentally friendly biological abiotic-resistance inducing agents for plants. In the current study, the effects and possible mechanisms of COS on improving the cold resistance of rice (II YOU 1259) seedlings were investigated. Compared with the control, a COS pre-soaking treatment enhanced photosynthesis, reduced oxidation damage and led to accumulation of more osmotic regulation substances under chilling treatment. In addition, a novel Deg/HtrA family serine endopeptidase (DegQ) gene, related to COS enhanced rice cold resistance, was identified. Quantitative real-time polymerase chain reaction (qRT-PCR) analysis revealed that transcription of DegQ and psbA (D1 protein encoding gene) were up-regulated in a time-dependent manner by COS treatment under cold stress. With increasing expression of the D1 protein, chlorophyll b content was enhanced correspondingly. The current results suggest that COS could enhance cold stress tolerance of rice by repairing the photodamaged photosystem II, altering osmotic regulation and reducing oxidation damage.
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Claims 8
Claim · model-written summary
COS pre-soaking enhanced photosynthesis under chilling.
- Taxon
- rice
Oryza sativat0 - Treatment
- COS pre-soaking treatmente0
- Outcome
- photosynthesise0
- Direction
- enhancede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the control, a COS pre-soaking treatment enhanced photosynthesis, reduced oxidation damage and led to accumulation of more osmotic regulation substances under chilling treatment”
t0“rice”
Claim · model-written summary
COS pre-soaking reduced oxidation damage under chilling.
- Taxon
- riceOryza sativat0
- Treatment
- COS pre-soaking treatmente0
- Outcome
- oxidation damagee0
- Direction
- reducede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the control, a COS pre-soaking treatment enhanced photosynthesis, reduced oxidation damage and led to accumulation of more osmotic regulation substances under chilling treatment”
t0“rice”
Claim · model-written summary
COS pre-soaking increased osmotic regulation substances under chilling.
- Taxon
- riceOryza sativat0
- Treatment
- COS pre-soaking treatmente0
- Outcome
- osmotic regulation substancese0
- Direction
- accumulation of moree0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the control, a COS pre-soaking treatment enhanced photosynthesis, reduced oxidation damage and led to accumulation of more osmotic regulation substances under chilling treatment”
t0“rice”
Claim · model-written summary
A DegQ gene associated with COS-enhanced cold resistance was identified in rice.
- Taxon
- riceOryza sativat0
- Gene
- DegQe0
- Outcome
- COS enhanced rice cold resistancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a novel Deg/HtrA family serine endopeptidase (DegQ) gene, related to COS enhanced rice cold resistance, was identified”
t0“rice”
Claim · model-written summary
COS up-regulated DegQ transcription with time under cold stress.
- Taxon
- riceOryza sativat0
- Treatment
- COS treatment under cold stresse0
- Gene
- DegQe0
- Outcome
- transcription of DegQe0
- Direction
- up-regulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“transcription of DegQ and psbA (D1 protein encoding gene) were up-regulated in a time-dependent manner by COS treatment under cold stress”
t0“rice”
Claim · model-written summary
COS up-regulated psbA transcription with time under cold stress.
- Taxon
- riceOryza sativat0
- Treatment
- COS treatment under cold stresse0
- Gene
- psbAe0
- Outcome
- transcription of DegQ and psbAe0
- Direction
- up-regulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“transcription of DegQ and psbA (D1 protein encoding gene) were up-regulated in a time-dependent manner by COS treatment under cold stress”
t0“rice”
Claim · model-written summary
Chlorophyll b content rose with D1 protein expression.
- Taxon
- riceOryza sativat0
- Gene
- D1 proteine0
- Outcome
- chlorophyll b contente0
- Direction
- enhancede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing expression of the D1 protein, chlorophyll b content was enhanced correspondingly”
t0“rice”
Claim · model-written summary
The authors propose that COS enhances rice cold tolerance through photosystem II repair, osmotic regulation, and reduced oxidation damage.
- Taxon
- riceOryza sativae0
- Treatment
- COSe0
- Outcome
- cold stress tolerancee0
- Qualifier
- could enhancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“COS could enhance cold stress tolerance of rice by repairing the photodamaged photosystem II, altering osmotic regulation and reducing oxidation damage”
The same questions in other papers
chitooligosaccharide · molecular: expression · Oryza sativa (rice)Positive and negative results
1 paper in the same direction as this paper · 1 reporting no difference from an alternative
- no effect
- positive
chitooligosaccharide · physiology: photosynthesis · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- positive
cold · molecular: expression · Oryza sativa (rice)Positive and negative results
29 papers in the same direction as this paper · 17 in the opposite direction
- no effect
- no effect
- no effect
43 papers more in this group
See all 47 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.