Abstract
To investigate the role of sugar metabolism in desiccation-sensitive seeds, we performed a natural desiccation treatment on Phoebe chekiangensis seeds in a room and systematically analyzed the changes in seed germination, sugar compounds, malondialdehyde, and relative electrical conductivity during the seed desiccation. The results revealed that the initial moisture content of P. chekiangensis seed was very high (37.06%) and the seed was sensitive to desiccation, the germination percentage of the seed decreased to 5.33% when the seed was desiccated to 22.04% of moisture content, therefore, the seeds were considered recalcitrant. Based on the logistic model, we know that the moisture content of the seeds is 29.05% when the germination percentage drops to 50% and that it is desirable to keep the seed moisture content above 31.74% during ambient transportation. During seed desiccation, sucrose and trehalose contents exhibited increasing trends, and raffinose also increased during the late stage of desiccation, however, low levels of the non-reducing sugar accumulations may not prevent the loss of seed viability caused by desiccation. Glucose and fructose predominated among sugar compounds, and they showed a slight increase followed by a significant decrease. Their depletion may have contributed to the accumulation of sucrose and raffinose family oligosaccharides. Correlation analysis revealed a significant relationship between the accumulation of sucrose, trehalose, and soluble sugars, and the reduction in seed viability. Sucrose showed a significant negative correlation with glucose and fructose. Trehalose also exhibited the same pattern of correlation. These results provided additional data and theoretical support for understanding the mechanism of sugar metabolism in seed desiccation sensitivity.
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Claims 13
Claim · model-written summary
The initial moisture content of P. chekiangensis seed was very high at 37.06%.
- Taxon
- P. chekiangensisPhoebe chekiangensise1
- Outcome
- initial moisture contente1
- Direction
- very highe1
- Value
- 37.06%e1
Verbatim
e1“the initial moisture content of P. chekiangensis seed was very high (37.06%)”
Claim · model-written summary
Germination percentage of Phoebe chekiangensis seed decreased to 5.33% when seed was desiccated to 22.04% moisture content.
- Taxon
- Phoebe chekiangensisPhoebe chekiangensist0
- Treatment
- desiccated to 22.04% of moisture contente1
- Outcome
- germination percentagee1
- Direction
- decreasede1
- Value
- 5.33%e1
Not reportedComparator
Verbatim
t0“Phoebe chekiangensis”
e1“the germination percentage of the seed decreased to 5.33% when the seed was desiccated to 22.04% of moisture content”
Claim · model-written summary
The seeds of Phoebe chekiangensis were considered recalcitrant.
- Taxon
- Phoebe chekiangensisPhoebe chekiangensist0
- Outcome
- recalcitrante1
Verbatim
t0“Phoebe chekiangensis”
e1“the seeds were considered recalcitrant”
Claim · model-written summary
Based on a logistic model, seed moisture content is 29.05% when germination drops to 50%.
- Taxon
- Phoebe chekiangensisPhoebe chekiangensist0
- Outcome
- moisture contente1
- Value
- 29.05%e1
- Qualifier
- germination percentage drops to 50%e1
Verbatim
t0“Phoebe chekiangensis”
e1“the moisture content of the seeds is 29.05% when the germination percentage drops to 50%”
Claim · model-written summary
It is desirable to keep seed moisture content above 31.74% during ambient transportation.
- Taxon
- Phoebe chekiangensisPhoebe chekiangensist0
- Outcome
- keep the seed moisture content above 31.74%e1
- Setting
- ambient transportatione1
Verbatim
t0“Phoebe chekiangensis”
e1“it is desirable to keep the seed moisture content above 31.74% during ambient transportation”
Claim · model-written summary
Sucrose and trehalose contents increased during seed desiccation.
- Taxon
- Phoebe chekiangensisPhoebe chekiangensist0
- Treatment
- seed desiccatione1
- Outcome
- sucrose and trehalose contentse1
- Direction
- increasinge1
Not reportedComparator
Verbatim
t0“Phoebe chekiangensis”
e1“During seed desiccation, sucrose and trehalose contents exhibited increasing trends”
Claim · model-written summary
Raffinose increased during the late stage of desiccation.
- Taxon
- Phoebe chekiangensisPhoebe chekiangensist0
- Treatment
- desiccatione1
- Outcome
- raffinosee1
- Direction
- increasede1
Not reportedComparator
Verbatim
t0“Phoebe chekiangensis”
e1“raffinose also increased during the late stage of desiccation”
Claim · model-written summary
Low levels of non-reducing sugar accumulation may not prevent the loss of seed viability caused by desiccation.
- Taxon
- Phoebe chekiangensisPhoebe chekiangensist0
- Treatment
- desiccatione1
- Compound
- non-reducing sugare1
- Outcome
- loss of seed viabilitye1
Verbatim
t0“Phoebe chekiangensis”
e1“low levels of the non-reducing sugar accumulations may not prevent the loss of seed viability caused by desiccation”
Claim · model-written summary
Glucose and fructose predominated among the sugar compounds.
- Taxon
- Phoebe chekiangensisPhoebe chekiangensist0
- Outcome
- Glucose and fructose predominatede1
Verbatim
t0“Phoebe chekiangensis”
e1“Glucose and fructose predominated among sugar compounds, and they showed a slight increase followed by a significant decrease”
Claim · model-written summary
Glucose and fructose showed a slight increase followed by a significant decrease during desiccation.
- Taxon
- Phoebe chekiangensisPhoebe chekiangensist0
- Outcome
- Glucose and fructosee1
- Direction
- slight increase followed by a significant decreasee1
Verbatim
t0“Phoebe chekiangensis”
e1“Glucose and fructose predominated among sugar compounds, and they showed a slight increase followed by a significant decrease”
Claim · model-written summary
Accumulation of sucrose, trehalose and soluble sugars was significantly related to the reduction in seed viability.
- Taxon
- Phoebe chekiangensisPhoebe chekiangensist0
- Compound
- sucrose, trehalose, and soluble sugarse1
- Outcome
- reduction in seed viabilitye1
Not reportedDirection
Verbatim
t0“Phoebe chekiangensis”
e1“Correlation analysis revealed a significant relationship between the accumulation of sucrose, trehalose, and soluble sugars, and the reduction in seed viability”
Claim · model-written summary
Sucrose showed a significant negative correlation with glucose and fructose.
- Taxon
- Phoebe chekiangensisPhoebe chekiangensist0
- Compound
- glucose and fructosee1
- Outcome
- Sucrosee1
- Direction
- negative correlatione1
Verbatim
t0“Phoebe chekiangensis”
e1“Sucrose showed a significant negative correlation with glucose and fructose”
Claim · model-written summary
Trehalose showed the same pattern of negative correlation with glucose and fructose.
- Taxon
- Phoebe chekiangensisPhoebe chekiangensist0
- Compound
- glucose and fructosee1
- Outcome
- Trehalosee2
- Direction
- same pattern of correlatione2
Verbatim
t0“Phoebe chekiangensis”
e1“Sucrose showed a significant negative correlation with glucose and fructose”
e2“Trehalose also exhibited the same pattern of correlation”