Abstract
【Objective】 In order to clarify the mechanism of silicon(Si) in enhancing the resistance to water stress,the effects of Si on the physiological and biochemical characteristics of the roots of rice seedlings were investigated under water stress.【Method】 The effects of exogenous Si on the physiological and biochemical parameters of roots of rice [(Oryza sativa ssp.(keng) Ting cv.Xiushui 11) and Brazilian upland rice(O.sativa cv.IAPAR 9)] were investigated under water stress induced by polyethylene glycol(PEG) in hydroponic conditions.【Result】 Exogenous Si could restrain excessive respiration,and increase the dry matter weight and relative water content of the PEG-stressed rice roots.On the 8th day after PEG treatment,the malondialdehyde(MDA) content in the roots of both Si-treated rice cultivars was decreased by 23% and 21%,and the relative electrolyte leakage was decreased by 39% and 38%,respectively,as compared to those of PEG treatment only.Consequently,the plasma membrane stability of the stressed roots was enhanced by Si application.In addition,exogenous Si also increased the root antioxidant defense capacity,slowed down the degradation of abscisic acid(ABA) in rice roots under PEG stress.【Conclusion】 Silicon application could enhance the resistance of rice roots to water deficit stress by preventing the rapid decline of physiological and biochemical activities in roots.
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Claims 11
Claim · model-written summary
Exogenous silicon restraind excessive respiration in PEG-stressed rice roots.
- Taxon
- rice
Oryza sativae0 - Organ / stage
- rootse0
- Treatment
- Exogenous Sie0
- Outcome
- excessive respiratione0
- Direction
- restraine0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Seedlings”
e0“Exogenous Si could restrain excessive respiration,and increase the dry matter weight and relative water content of the PEG-stressed rice roots.”
Claim · model-written summary
Exogenous silicon increased dry matter weight in PEG-stressed rice roots.
- Taxon
- riceOryza sativae0
- Organ / stage
- rootse0
- Treatment
- Exogenous Sie0
- Outcome
- dry matter weighte0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Seedlings”
e0“Exogenous Si could restrain excessive respiration,and increase the dry matter weight and relative water content of the PEG-stressed rice roots.”
Claim · model-written summary
Exogenous silicon increased relative water content in PEG-stressed rice roots.
- Taxon
- riceOryza sativae0
- Organ / stage
- rootse0
- Treatment
- Exogenous Sie0
- Outcome
- relative water contente0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Seedlings”
e0“Exogenous Si could restrain excessive respiration,and increase the dry matter weight and relative water content of the PEG-stressed rice roots.”
Claim · model-written summary
Silicon reduced malondialdehyde(MDA) content in Xiushui 11 roots by 23% versus PEG alone on day eight.
- Taxon
- riceOryza sativae7
- Material
- Xiushui 11e7
- Organ / stage
- rootse1
- Treatment
- Si-treatede1
- Outcome
- malondialdehyde(MDA) contente1
- Direction
- decreasede1
- Value
- 23%e1
- Comparator
- PEG treatment onlye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Seedlings”
e7“rice [(Oryza sativa ssp.(keng) Ting cv.Xiushui 11) and Brazilian upland rice(O.sativa cv.IAPAR 9)]”
e1“On the 8th day after PEG treatment,the malondialdehyde(MDA) content in the roots of both Si-treated rice cultivars was decreased by 23% and 21%,and the relative electrolyte leakage was decreased by 39% and 38%,respectively,as compared to those of PEG treatment only.”
Claim · model-written summary
Silicon reduced malondialdehyde(MDA) content in IAPAR 9 roots by 21% versus PEG alone on day eight.
- Taxon
- riceOryza sativae7
- Material
- IAPAR 9e7
- Organ / stage
- rootse1
- Treatment
- Si-treatede1
- Outcome
- malondialdehyde(MDA) contente1
- Direction
- decreasede1
- Value
- 21%e1
- Comparator
- PEG treatment onlye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Seedlings”
e7“rice [(Oryza sativa ssp.(keng) Ting cv.Xiushui 11) and Brazilian upland rice(O.sativa cv.IAPAR 9)]”
e1“On the 8th day after PEG treatment,the malondialdehyde(MDA) content in the roots of both Si-treated rice cultivars was decreased by 23% and 21%,and the relative electrolyte leakage was decreased by 39% and 38%,respectively,as compared to those of PEG treatment only.”
Claim · model-written summary
Silicon reduced relative electrolyte leakage in Xiushui 11 roots by 39% versus PEG alone on day eight.
- Taxon
- riceOryza sativae7
- Material
- Xiushui 11e7
- Organ / stage
- rootse1
- Treatment
- Si-treatede1
- Outcome
- relative electrolyte leakagee1
- Direction
- decreasede1
- Value
- 39%e1
- Comparator
- PEG treatment onlye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Seedlings”
e7“rice [(Oryza sativa ssp.(keng) Ting cv.Xiushui 11) and Brazilian upland rice(O.sativa cv.IAPAR 9)]”
e1“On the 8th day after PEG treatment,the malondialdehyde(MDA) content in the roots of both Si-treated rice cultivars was decreased by 23% and 21%,and the relative electrolyte leakage was decreased by 39% and 38%,respectively,as compared to those of PEG treatment only.”
Claim · model-written summary
Silicon reduced relative electrolyte leakage in IAPAR 9 roots by 38% versus PEG alone on day eight.
- Taxon
- riceOryza sativae7
- Material
- IAPAR 9e7
- Organ / stage
- rootse1
- Treatment
- Si-treatede1
- Outcome
- relative electrolyte leakagee1
- Direction
- decreasede1
- Value
- 38%e1
- Comparator
- PEG treatment onlye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Seedlings”
e7“rice [(Oryza sativa ssp.(keng) Ting cv.Xiushui 11) and Brazilian upland rice(O.sativa cv.IAPAR 9)]”
e1“On the 8th day after PEG treatment,the malondialdehyde(MDA) content in the roots of both Si-treated rice cultivars was decreased by 23% and 21%,and the relative electrolyte leakage was decreased by 39% and 38%,respectively,as compared to those of PEG treatment only.”
Claim · model-written summary
Silicon enhanced plasma membrane stability in stressed rice roots.
- Taxon
- RiceOryza sativat0
- Organ / stage
- stressed rootse2
- Treatment
- Si applicatione2
- Outcome
- plasma membrane stabilitye2
- Direction
- enhancede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Seedlings”
e2“Consequently,the plasma membrane stability of the stressed roots was enhanced by Si application.”
Claim · model-written summary
Exogenous silicon increased root antioxidant defense capacity in PEG-stressed rice roots.
- Taxon
- riceOryza sativae3
- Organ / stage
- rice rootse3
- Treatment
- exogenous Sie3
- Outcome
- root antioxidant defense capacitye3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Seedlings”
e3“exogenous Si also increased the root antioxidant defense capacity,slowed down the degradation of abscisic acid(ABA) in rice roots under PEG stress.”
Claim · model-written summary
Exogenous silicon slowed down degradation of abscisic acid(ABA) in PEG-stressed rice roots.
- Taxon
- riceOryza sativae3
- Organ / stage
- rice rootse3
- Treatment
- exogenous Sie3
- Outcome
- degradation of abscisic acid(ABA)e3
- Direction
- slowed downe3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Seedlings”
e3“exogenous Si also increased the root antioxidant defense capacity,slowed down the degradation of abscisic acid(ABA) in rice roots under PEG stress.”
Claim · model-written summary
The authors conclude that silicon enhances rice root resistance to water deficit stress.
- Taxon
- riceOryza sativae4
- Treatment
- Silicon applicatione4
- Outcome
- resistance of rice roots to water deficit stresse4
- Direction
- enhancee4
- Qualifier
- preventing the rapid decline of physiological and biochemical activities in rootse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Seedlings”
e4“Silicon application could enhance the resistance of rice roots to water deficit stress by preventing the rapid decline of physiological and biochemical activities in roots.”
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