Abstract
In order to reveal the relationship between physiological difference and high photosynthetic efficiency in C3 plant with high expression C4 pepc,the transgenic rice with high expression of maize C4 pepc(PC) and the untransformed rice plant Kitaake(WT) were used as the material plants.The up-second leaves of the rice plants were used to treat by root system during the booting stage.After the treatments of the different concentrations of NO donor,NO synthesis inhibitors and related signal related reagents as well as in the dark for 12 h,the effects of NO on the net photosynthetic rate(Pn),stomatal conductance(Gs) and intercellular CO2 concentration(Ci) of the test material leaves were measured.The results showed that: Pn of WT and PC increased by 20.8% and 10.7%,respectively under the treatments of 200 μmol·L-1 SNP(Sodium nitroprusside) and 1 mmol·L-1 L-Arg(L-Arginine),which was significantly different(p0.05);However,with increasing the concentrations of SNP and L-Arg,the Pn,Gs and Ci of two rice plants were gradually suppressed.Compared with PC,the Pn of WT was significantly inhibited(p0.05),but the changes of Gs and Ci were opposite;When treated by 200 μmol·L-1 SNP and 1 mmol·L-1 L-Arg as well as SA(salicylic acid) for the test materials,the changes of Pn,Gs and Ci were similar with those under high concentrations of NO donors treatment;Under united 6 mmol·L-1 EGTA of Ca2+ chelator treatment,compared with the PC,the Pn of WT was significantly inhibited at the level(p0.01),that Ci was opposite(p0.05).Correlation analysis showed that: The correlationship between the Pn and the Gs in PC was less than that of WT,the determination coefficients were 0.654 9 and 0.773 5;However,The correlationship between the Pn and the Ci in PC was larger than that of WT,the determination coefficients were 0.466 5 and 0.419 6,which implied that there might be different way of the regulation of photosynthesis between PC and WT,especially at lower concentrations of NO in PC,NO might participate in the process of the stomatal movement with high concentration of free Ca2+.It can still maintain the stability of Pn in PC under the conditions in stomatal closure.
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Claims 12
Claim · model-written summary
NO-donor treatment increased net photosynthetic rate of wild-type rice by 20.8%.
- Taxon
- Rice Plant
Oryza sativat0 - Material
- WTe0
- Treatment
- 200 μmol·L-1 SNP(Sodium nitroprusside) and 1 mmol·L-1 L-Arg(L-Arginine)e0
- Outcome
- Pne0
- Direction
- increasede0
- Value
- 20.8%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Plant”
e0“Pn of WT and PC increased by 20.8% and 10.7%,respectively under the treatments of 200 μmol·L-1 SNP(Sodium nitroprusside) and 1 mmol·L-1 L-Arg(L-Arginine)”
Claim · model-written summary
The same treatment increased net photosynthetic rate of transgenic PC rice by 10.7%.
- Taxon
- Rice PlantOryza sativat0
- Material
- PCe0
- Treatment
- 200 μmol·L-1 SNP(Sodium nitroprusside) and 1 mmol·L-1 L-Arg(L-Arginine)e0
- Outcome
- Pne0
- Direction
- increasede0
- Value
- 10.7%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Plant”
e0“Pn of WT and PC increased by 20.8% and 10.7%,respectively under the treatments of 200 μmol·L-1 SNP(Sodium nitroprusside) and 1 mmol·L-1 L-Arg(L-Arginine)”
Claim · model-written summary
Increasing SNP and L-Arg concentrations suppressed Pn, Gs and Ci in both rice lines.
- Taxon
- Rice PlantOryza sativat0
- Treatment
- increasing the concentrations of SNP and L-Arge0
- Outcome
- Pn,Gs and Cie0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Plant”
e0“with increasing the concentrations of SNP and L-Arg,the Pn,Gs and Ci of two rice plants were gradually suppressed”
Claim · model-written summary
WT Pn was significantly inhibited relative to PC.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Plant”
e0“Compared with PC,the Pn of WT was significantly inhibited”
Claim · model-written summary
WT Gs and Ci responses were opposite to Pn relative to PC.
- Taxon
- Rice PlantOryza sativat0
- Outcome
- changes of Gs and Cie0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Plant”
e0“but the changes of Gs and Ci were opposite”
Claim · model-written summary
SA combined with NO donors produced gas-exchange changes similar to high NO donor concentrations.
- Taxon
- Rice PlantOryza sativat0
- Treatment
- 200 μmol·L-1 SNP and 1 mmol·L-1 L-Arg as well as SA(salicylic acid)e0
- Outcome
- changes of Pn,Gs and Cie0
- Direction
- similare0
- Comparator
- high concentrations of NO donors treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Plant”
e0“When treated by 200 μmol·L-1 SNP and 1 mmol·L-1 L-Arg as well as SA(salicylic acid) for the test materials,the changes of Pn,Gs and Ci were similar with those under high concentrations of NO donors treatment”
Claim · model-written summary
Under EGTA treatment, WT Pn was inhibited relative to PC.
- Taxon
- Rice PlantOryza sativat0
- Material
- WTe0
- Treatment
- 6 mmol·L-1 EGTA of Ca2+ chelator treatmente0
- Outcome
- Pne0
- Direction
- inhibitede0
- Comparator
- PCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Plant”
e0“Under united 6 mmol·L-1 EGTA of Ca2+ chelator treatment,compared with the PC,the Pn of WT was significantly inhibited”
Claim · model-written summary
Under EGTA, Ci changed oppositely to Pn in WT relative to PC.
- Taxon
- Rice PlantOryza sativat0
- Outcome
- Cie0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Plant”
e0“that Ci was opposite”
Claim · model-written summary
Pn–Gs correlation was weaker in PC than WT, with determination coefficients of 0.654 9 and 0.773 5.
- Taxon
- Rice PlantOryza sativat0
- Material
- PCe0
- Outcome
- correlationship between the Pn and the Gse0
- Direction
- less thane0
- Value
- 0.654 9 and 0.773 5e0
- Comparator
- WTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Plant”
e0“The correlationship between the Pn and the Gs in PC was less than that of WT,the determination coefficients were 0.654 9 and 0.773 5”
Claim · model-written summary
Pn–Ci correlation was stronger in PC than WT, with coefficients of 0.466 5 and 0.419 6.
- Taxon
- Rice PlantOryza sativat0
- Material
- PCe0
- Outcome
- correlationship between the Pn and the Cie0
- Direction
- larger thane0
- Value
- 0.466 5 and 0.419 6e0
- Comparator
- WTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Plant”
e0“The correlationship between the Pn and the Ci in PC was larger than that of WT,the determination coefficients were 0.466 5 and 0.419 6”
Claim · model-written summary
The authors suggest NO may participate in stomatal movement with high free Ca2+ in PC at low NO concentrations.
- Taxon
- Rice PlantOryza sativat0
- Outcome
- stomatal movemente0
- Qualifier
- NO might participate in the process of the stomatal movement with high concentration of free Ca2+e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Plant”
e0“especially at lower concentrations of NO in PC,NO might participate in the process of the stomatal movement with high concentration of free Ca2+”
Claim · model-written summary
PC maintained Pn stability during stomatal closure.
- Taxon
- Rice PlantOryza sativat0
- Material
- PCe0
- Outcome
- stability of Pne0
- Qualifier
- under the conditions in stomatal closuree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Plant”
e0“It can still maintain the stability of Pn in PC under the conditions in stomatal closure”
The same questions in other papers
sodium nitroprusside · physiology: photosynthesis · Oryza sativa (rice)Positive and negative results
3 in the opposite direction
- positive
- positive
- positive
salicylic acid · physiology: photosynthesis · Oryza sativa (rice)Positive and negative results
16 reporting no difference from an alternative
- positive
- positive
- positive
13 papers more in this group
See all 17 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.