Abstract
This study was conducted to evaluate the drought tolerance of Japonica and Indica rice cultivars during germinating and seedling stages by using the polyethylene glycol (PEG) solution. Each 5 cultivars of Japonica and Indica were cultured from 14 days after seeding(DAS) to 21 DAS using the PEG solution in a moderate water potential (-0.63 MPa). The lengths of radicle and plumule during the germinating stage were inhibitied by the PEG treatment to about 50% and 85%, respectively. The application of PEG to the seedling of two rice types caused to inhibit the plant height and leaf age about 23 % and 10%, respectively. Shoot and root dry weights by PEG treatment were inhibited more severely in Japonica than those in Indica. The difference on delaying of leaf area expansion between both rice types was not found with treatment of PEG, while the leaf color was increased in both Japonica and Indica by 19.9% and 9.2%, respectively. The average photosynthetic ability was inhibited more in Japonica to 36.0% than did Indica to 27.9%. The stomatal conductance was severely affected by PEG treatment, and the degree was varied in both rice types, ranged with 80-85% in Japonica and 29.3-81.6% in Indica. These results indicate there is little relationship between seed germination and seedling growth under the stress of low water potential.
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Claims 13
Claim · model-written summary
PEG inhibited rice radicle length during germination to about 50%.
- Taxon
- rice
Oryza sativat0 - Organ / stage
- germinating stagee0
- Treatment
- PEG treatmente0
- Outcome
- lengths of radiclee0
- Direction
- inhibitiede0
- Value
- 50%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lengths of radicle and plumule during the germinating stage were inhibitied by the PEG treatment to about 50% and 85%, respectively.”
t0“rice seedlings”
Claim · model-written summary
PEG inhibited rice plumule length during germination to about 85%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lengths of radicle and plumule during the germinating stage were inhibitied by the PEG treatment to about 50% and 85%, respectively.”
t0“rice seedlings”
Claim · model-written summary
PEG inhibited seedling plant height by about 23%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of PEG to the seedling of two rice types caused to inhibit the plant height and leaf age about 23 % and 10%, respectively.”
t0“rice seedlings”
Claim · model-written summary
PEG inhibited leaf age by about 10%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of PEG to the seedling of two rice types caused to inhibit the plant height and leaf age about 23 % and 10%, respectively.”
t0“rice seedlings”
Claim · model-written summary
PEG inhibited shoot and root dry weights more severely in Japonica than Indica.
- Taxon
- riceOryza sativat0
- Material
- Japonicae0
- Treatment
- PEG treatmente0
- Outcome
- Shoot and root dry weightse0
- Direction
- inhibited more severelye0
- Comparator
- Indicae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot and root dry weights by PEG treatment were inhibited more severely in Japonica than those in Indica.”
t0“rice seedlings”
Claim · model-written summary
PEG did not produce a difference between rice types in delayed leaf area expansion.
- Taxon
- riceOryza sativat0
- Treatment
- PEGe0
- Outcome
- difference on delaying of leaf area expansione0
- Direction
- not founde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The difference on delaying of leaf area expansion between both rice types was not found with treatment of PEG”
t0“rice seedlings”
Claim · model-written summary
PEG increased leaf color in Japonica by 19.9%.
- Taxon
- riceOryza sativat0
- Material
- Japonicae0
- Treatment
- PEGe1
- Outcome
- leaf colore0
- Direction
- increasede0
- Value
- 19.9%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the leaf color was increased in both Japonica and Indica by 19.9% and 9.2%, respectively.”
e1“Shoot and root dry weights by PEG treatment were inhibited more severely in Japonica than those in Indica.”
t0“rice seedlings”
Claim · model-written summary
PEG increased leaf color in Indica by 9.2%.
- Taxon
- riceOryza sativat0
- Material
- Indicae0
- Treatment
- PEGe1
- Outcome
- leaf colore0
- Direction
- increasede0
- Value
- 9.2%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the leaf color was increased in both Japonica and Indica by 19.9% and 9.2%, respectively.”
e1“Shoot and root dry weights by PEG treatment were inhibited more severely in Japonica than those in Indica.”
t0“rice seedlings”
Claim · model-written summary
Average photosynthetic ability was inhibited to 36.0% in Japonica.
- Taxon
- riceOryza sativat0
- Material
- Japonicae0
- Treatment
- water stress by PEGt0
- Outcome
- average photosynthetic abilitye0
- Direction
- inhibited moree0
- Value
- 36.0%e0
- Comparator
- Indicae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average photosynthetic ability was inhibited more in Japonica to 36.0% than did Indica to 27.9%.”
t0“water stress by PEG on growth and physiological traits in rice seedlings”
Claim · model-written summary
Average photosynthetic ability was inhibited to 27.9% in Indica.
- Taxon
- riceOryza sativat0
- Material
- Indicae0
- Treatment
- PEGt0
- Outcome
- average photosynthetic abilitye0
- Direction
- inhibitede0
- Value
- 27.9%e0
- Comparator
- Japonicae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average photosynthetic ability was inhibited more in Japonica to 36.0% than did Indica to 27.9%.”
t0“water stress by PEG on growth and physiological traits in rice seedlings”
Claim · model-written summary
PEG severely affected stomatal conductance in Japonica, with a degree of 80-85%.
- Taxon
- riceOryza sativat0
- Material
- Japonicae0
- Treatment
- PEG treatmente0
- Outcome
- stomatal conductancee0
- Value
- 80-85%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The stomatal conductance was severely affected by PEG treatment, and the degree was varied in both rice types, ranged with 80-85% in Japonica and 29.3-81.6% in Indica.”
t0“rice seedlings”
Claim · model-written summary
PEG affected stomatal conductance in Indica, with a degree of 29.3-81.6%.
- Taxon
- riceOryza sativat0
- Material
- Indicae0
- Treatment
- PEG treatmente0
- Outcome
- stomatal conductancee0
- Value
- 29.3-81.6%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The stomatal conductance was severely affected by PEG treatment, and the degree was varied in both rice types, ranged with 80-85% in Japonica and 29.3-81.6% in Indica.”
t0“rice seedlings”
Claim · model-written summary
Seed germination and seedling growth had little relationship under low water potential.
- Taxon
- riceOryza sativat0
- Organ / stage
- seed germinatione0
- Treatment
- stress of low water potentiale0
- Outcome
- seedling growthe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there is little relationship between seed germination and seedling growth under the stress of low water potential.”
t0“rice seedlings”
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