Abstract
The experiment was conducted at Anzhen city,Wuxi,Jiangsu,China,to study the effect of free-air CO_2 enrichment [FACE,200 μmol·mol~(-1) higher than ambient(AMB)] on spikelet differentiation and degeneration,using the japonica cultivar Wuxiangjing 14,in 20012003.Results of FACE treatment showed that the survived spikelets per panicle have decreased by 10.4 to 12.6,i.e.6.88% to 8.49%.There were no significant effects on the differentiated spikelets per panicle and the degenerated spikelets of the primary branches per panicle,while an increase of the number and percentage of spikelets degenerated on the secondary branches per panicle compared with those under AMB;the plant N accumulation per differentiated spikelet at heading and N absorption per differentiated spikelet from stem elongating to heading were significantly lower,whereas the content of soluble carbohydrates in stem and sheath at heading and the ratio of that to nitrogen content in rice plant were significantly higher compared with those under AMB;the degenerated spikelets per panicle negatively and significantly correlated with the N accumulation per differentiated spikelet at heading((-0.848~())) and with the N absorption per differentiated spikelet from elongating to heading(-0.961~()),respectively;While the degenerated spikelets per panicle positively and significantly correlated with the content of soluble carbohydrates in stem and sheath(0.808~) and with the ratio of the soluble carbohydrates content in stem and sheath to nitrogen content in rice plant at heading stage(0.837~),respectively.It was speculated that the ability of N absorption weakened,carbon metabolism strengthened and nitrogen metabolism weakened due to FACE during the period of spikelets formation,were the primary causes of largely degenerating number of differentiated spikelets and decreasing number of spikelets per panicle under FACE condition.
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Claims 13
Claim · model-written summary
FACE reduced surviving spikelets per panicle by 10.4 to 12.6, or 6.88% to 8.49%.
- Taxon
- Rice
Oryza sativat0 - Treatment
- FACEe2
- Outcome
- survived spikelets per paniclee0
- Direction
- decreasede0
- Value
- 10.4 to 12.6e0
- Qualifier
- 6.88% to 8.49%e0
- Comparator
- AMBe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the survived spikelets per panicle have decreased by 10.4 to 12.6,i.e.6.88% to 8.49%”
t0“Rice”
e2“Results of FACE treatment showed that the survived spikelets per panicle have decreased by 10.4 to 12.6,i.e.6.88% to 8.49%”
e3“higher than ambient(AMB)”
Claim · model-written summary
FACE had no significant effect on differentiated spikelets per panicle.
- Taxon
- RiceOryza sativat0
- Treatment
- FACEe2
- Outcome
- differentiated spikelets per paniclee0
- Direction
- no significant effectse0
- Comparator
- AMBe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were no significant effects on the differentiated spikelets per panicle and the degenerated spikelets of the primary branches per panicle”
t0“Rice”
e2“Results of FACE treatment showed that the survived spikelets per panicle have decreased by 10.4 to 12.6,i.e.6.88% to 8.49%”
e3“higher than ambient(AMB)”
Claim · model-written summary
FACE had no significant effect on degenerated spikelets of primary branches.
- Taxon
- RiceOryza sativat0
- Treatment
- FACEe2
- Outcome
- degenerated spikelets of the primary branches per paniclee0
- Direction
- no significant effectse0
- Comparator
- AMBe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were no significant effects on the differentiated spikelets per panicle and the degenerated spikelets of the primary branches per panicle”
t0“Rice”
e2“Results of FACE treatment showed that the survived spikelets per panicle have decreased by 10.4 to 12.6,i.e.6.88% to 8.49%”
e3“higher than ambient(AMB)”
Claim · model-written summary
FACE increased the number and percentage of degenerated spikelets on secondary branches.
- Taxon
- RiceOryza sativat0
- Treatment
- FACEe2
- Outcome
- number and percentage of spikelets degenerated on the secondary branches per paniclee0
- Direction
- increasee0
- Comparator
- AMBe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increase of the number and percentage of spikelets degenerated on the secondary branches per panicle compared with those under AMB”
t0“Rice”
e2“Results of FACE treatment showed that the survived spikelets per panicle have decreased by 10.4 to 12.6,i.e.6.88% to 8.49%”
Claim · model-written summary
FACE lowered nitrogen accumulation per differentiated spikelet at heading.
- Taxon
- RiceOryza sativat0
- Treatment
- FACEe2
- Outcome
- plant N accumulation per differentiated spikelet at headinge0
- Direction
- lowere0
- Comparator
- AMBe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the plant N accumulation per differentiated spikelet at heading and N absorption per differentiated spikelet from stem elongating to heading were significantly lower”
t0“Rice”
e2“Results of FACE treatment showed that the survived spikelets per panicle have decreased by 10.4 to 12.6,i.e.6.88% to 8.49%”
e3“higher than ambient(AMB)”
Claim · model-written summary
FACE lowered nitrogen absorption per differentiated spikelet from stem elongation to heading.
- Taxon
- RiceOryza sativat0
- Treatment
- FACEe2
- Outcome
- N absorption per differentiated spikelet from stem elongating to headinge0
- Direction
- lowere0
- Comparator
- AMBe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N absorption per differentiated spikelet from stem elongating to heading were significantly lower”
t0“Rice”
e2“Results of FACE treatment showed that the survived spikelets per panicle have decreased by 10.4 to 12.6,i.e.6.88% to 8.49%”
e3“higher than ambient(AMB)”
Claim · model-written summary
FACE raised soluble carbohydrate content in stem and sheath at heading.
- Taxon
- riceOryza sativae0
- Treatment
- FACEe2
- Outcome
- content of soluble carbohydrates in stem and sheath at headinge0
- Direction
- highere0
- Comparator
- AMBe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the content of soluble carbohydrates in stem and sheath at heading and the ratio of that to nitrogen content in rice plant were significantly higher”
t0“Rice”
e1“The experiment was conducted at Anzhen city,Wuxi,Jiangsu,China,to study the effect of free-air CO_2 enrichment [FACE,200 μmol·mol~(-1) higher than ambient(AMB)] on spikelet differentiation and degeneration,using the japonica cultivar Wuxiangjing 14,in 20012003.Results of FACE treatment showed that the survived spikelets per panicle have decreased by 10.4 to 12.6,i.e.6.88% to 8.49%.”
e2“Results of FACE treatment showed that the survived spikelets per panicle have decreased by 10.4 to 12.6,i.e.6.88% to 8.49%”
e3“higher than ambient(AMB)”
Claim · model-written summary
FACE raised the soluble carbohydrate to nitrogen content ratio.
- Taxon
- riceOryza sativae0
- Treatment
- FACEe2
- Outcome
- ratio of that to nitrogen contente0
- Direction
- highere0
- Comparator
- AMBe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the ratio of that to nitrogen content in rice plant were significantly higher”
t0“Rice”
e1“The experiment was conducted at Anzhen city,Wuxi,Jiangsu,China,to study the effect of free-air CO_2 enrichment [FACE,200 μmol·mol~(-1) higher than ambient(AMB)] on spikelet differentiation and degeneration,using the japonica cultivar Wuxiangjing 14,in 20012003.Results of FACE treatment showed that the survived spikelets per panicle have decreased by 10.4 to 12.6,i.e.6.88% to 8.49%.”
e2“Results of FACE treatment showed that the survived spikelets per panicle have decreased by 10.4 to 12.6,i.e.6.88% to 8.49%”
e3“higher than ambient(AMB)”
Claim · model-written summary
Degenerated spikelets correlated negatively with nitrogen accumulation per differentiated spikelet at heading.
- Taxon
- RiceOryza sativat0
- Compound
- Ne0
- Outcome
- degenerated spikelets per paniclee0
- Direction
- negativelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the degenerated spikelets per panicle negatively and significantly correlated with the N accumulation per differentiated spikelet at heading”
t0“Rice”
Claim · model-written summary
Degenerated spikelets correlated negatively with nitrogen absorption per differentiated spikelet.
- Taxon
- RiceOryza sativat0
- Compound
- Ne0
- Outcome
- degenerated spikelets per paniclee2
- Direction
- negativelye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with the N absorption per differentiated spikelet from elongating to heading”
t0“Rice”
e2“the degenerated spikelets per panicle negatively and significantly correlated with the N accumulation per differentiated spikelet at heading”
Claim · model-written summary
Degenerated spikelets correlated positively with soluble carbohydrates in stem and sheath.
- Taxon
- RiceOryza sativat0
- Compound
- soluble carbohydratese0
- Outcome
- degenerated spikelets per paniclee0
- Direction
- positivelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the degenerated spikelets per panicle positively and significantly correlated with the content of soluble carbohydrates in stem and sheath”
t0“Rice”
Claim · model-written summary
Degenerated spikelets correlated positively with the soluble carbohydrate to nitrogen ratio.
- Taxon
- riceOryza sativae0
- Compound
- soluble carbohydratese0
- Outcome
- degenerated spikelets per paniclee2
- Direction
- positivelye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with the ratio of the soluble carbohydrates content in stem and sheath to nitrogen content in rice plant at heading stage”
t0“Rice”
e1“The experiment was conducted at Anzhen city,Wuxi,Jiangsu,China,to study the effect of free-air CO_2 enrichment [FACE,200 μmol·mol~(-1) higher than ambient(AMB)] on spikelet differentiation and degeneration,using the japonica cultivar Wuxiangjing 14,in 20012003.Results of FACE treatment showed that the survived spikelets per panicle have decreased by 10.4 to 12.6,i.e.6.88% to 8.49%.”
e2“the degenerated spikelets per panicle negatively and significantly correlated with the N accumulation per differentiated spikelet at heading”
e3“the degenerated spikelets per panicle positively and significantly correlated with the content of soluble carbohydrates in stem and sheath”
Claim · model-written summary
The authors speculate that weaker nitrogen absorption and metabolism and stronger carbon metabolism caused greater spikelet degeneration under FACE.
- Taxon
- RiceOryza sativat0
- Treatment
- FACEe0
- Outcome
- largely degenerating number of differentiated spikelets and decreasing number of spikelets per paniclee0
- Qualifier
- ability of N absorption weakened,carbon metabolism strengthened and nitrogen metabolism weakenede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It was speculated that the ability of N absorption weakened,carbon metabolism strengthened and nitrogen metabolism weakened due to FACE during the period of spikelets formation,were the primary causes of largely degenerating number of differentiated spikelets and decreasing number of spikelets per panicle under FACE condition”
t0“Rice”
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