Abstract
Photosynthetic pigments contents,photosynthetic characteristics,chlorophyll fluorescence parameters,osmolytes,and water use efficiency(WUE)and yield factors at milky stage of two rice lines T-04 and T-43(Oryza sativa subsp.keng)were analyzed under traditional continuous flooding and drip irrigation with plastic film mulching in apot experiment.The results showed that the WUE of rice under drip irrigation with plastic film mulching were higher than that under traditional flooding,but chlorophyll a,chlorophyll b and carotenoids contents were significantly reduced compared with those under traditional continuous flooding.The maximum leaf net photosynthetic rate,relatively high intercellular CO2 concentration(Ci)and an equivalent stomatal conductance(GS),transpiration rate(Tr)were significantly lower than those under continuous flooding,indicating that the reduced photosynthetic rate was attributed to both chlorophyll contents and stoma.Apparent quantum efficiency(AQY),carboxylation efficiency(CE),ΦPSⅡ,electron transport rate(ETR)and Fv/Fmdecreased significantly(P0.05).Lower photosynthetic pigments contents might be the main factor to low leaf photosynthetic rate which directly leads to 1ower light-harvesting capacity and photochemical conversion efficiencies of the PSⅡ reaction center.The contents of soluble sugars(SS)and soluble proteins(SP)were lower,but both proline(Pro)and malondialdehyde(MDA)contents were higher than those under continuous flooding cultivation,implicating that drip irrigation with plastic film mulching resulted in membrane lipid peroxidation,and cell membrane damage to some degree,but activated osmolytes accumulation thus enhanced its drought tolerance.Effective panicle number per unit area and seed setting rate under drip irrigation with plastic film mulching were significantly reduced,leading to a declined seed production.
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Claims 14
Claim · model-written summary
Water use efficiency was higher under drip irrigation with film mulching.
- Taxon
- rice
Oryza sativae0 - Treatment
- drip irrigation with plastic film mulchinge0
- Outcome
- WUEe0
- Direction
- highere0
- Comparator
- traditional floodinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“WUE of rice under drip irrigation with plastic film mulching were higher than that under traditional flooding”
Claim · model-written summary
Chlorophyll a, chlorophyll b and carotenoid contents were significantly reduced versus flooding.
- Taxon
- RiceOryza sativat0
- Treatment
- drip irrigation with plastic film mulchingt0
- Outcome
- chlorophyll a,chlorophyll b and carotenoids contentse0
- Direction
- reducede0
- Comparator
- traditional continuous floodinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chlorophyll a,chlorophyll b and carotenoids contents were significantly reduced compared with those under traditional continuous flooding”
t0“Rice Under Drip Irrigation with Plastic Film Mulching”
Claim · model-written summary
Maximum leaf net photosynthetic rate was significantly lower than under flooding.
- Taxon
- RiceOryza sativat0
- Treatment
- Drip Irrigation with Plastic Film Mulchingt0
- Outcome
- maximum leaf net photosynthetic ratee0
- Direction
- lowere0
- Comparator
- continuous floodinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum leaf net photosynthetic rate,relatively high intercellular CO2 concentration(Ci)and an equivalent stomatal conductance(GS),transpiration rate(Tr)were significantly lower than those under continuous flooding”
t0“Rice Under Drip Irrigation with Plastic Film Mulching”
Claim · model-written summary
Intercellular CO2 concentration, stomatal conductance and transpiration were significantly lower than under flooding.
- Taxon
- RiceOryza sativat0
- Treatment
- Drip Irrigation with Plastic Film Mulchingt0
- Outcome
- intercellular CO2 concentration(Ci)and an equivalent stomatal conductance(GS),transpiration rate(Tr)e0
- Direction
- lowere0
- Comparator
- continuous floodinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum leaf net photosynthetic rate,relatively high intercellular CO2 concentration(Ci)and an equivalent stomatal conductance(GS),transpiration rate(Tr)were significantly lower than those under continuous flooding”
t0“Rice Under Drip Irrigation with Plastic Film Mulching”
Claim · model-written summary
Apparent quantum efficiency, carboxylation efficiency and ΦPSⅡ decreased significantly.
- Taxon
- RiceOryza sativat0
- Treatment
- Drip Irrigation with Plastic Film Mulchingt0
- Outcome
- Apparent quantum efficiency(AQY),carboxylation efficiency(CE),ΦPSⅡe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Apparent quantum efficiency(AQY),carboxylation efficiency(CE),ΦPSⅡ,electron transport rate(ETR)and Fv/Fmdecreased significantly(P0.05)”
t0“Rice Under Drip Irrigation with Plastic Film Mulching”
Claim · model-written summary
Electron transport rate and Fv/Fm decreased significantly.
- Taxon
- RiceOryza sativat0
- Treatment
- Drip Irrigation with Plastic Film Mulchingt0
- Outcome
- electron transport rate(ETR)and Fv/Fme0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Apparent quantum efficiency(AQY),carboxylation efficiency(CE),ΦPSⅡ,electron transport rate(ETR)and Fv/Fmdecreased significantly(P0.05)”
t0“Rice Under Drip Irrigation with Plastic Film Mulching”
Claim · model-written summary
Soluble sugar and soluble protein contents were lower than under flooding.
- Taxon
- RiceOryza sativat0
- Treatment
- Drip Irrigation with Plastic Film Mulchingt0
- Outcome
- soluble sugars(SS)and soluble proteins(SP)e0
- Direction
- lowere0
- Comparator
- continuous flooding cultivatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The contents of soluble sugars(SS)and soluble proteins(SP)were lower,but both proline(Pro)and malondialdehyde(MDA)contents were higher than those under continuous flooding cultivation”
t0“Rice Under Drip Irrigation with Plastic Film Mulching”
Claim · model-written summary
Proline and malondialdehyde contents were higher than under flooding.
- Taxon
- RiceOryza sativat0
- Treatment
- Drip Irrigation with Plastic Film Mulchingt0
- Outcome
- proline(Pro)and malondialdehyde(MDA)contentse0
- Direction
- highere0
- Comparator
- continuous flooding cultivatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The contents of soluble sugars(SS)and soluble proteins(SP)were lower,but both proline(Pro)and malondialdehyde(MDA)contents were higher than those under continuous flooding cultivation”
t0“Rice Under Drip Irrigation with Plastic Film Mulching”
Claim · model-written summary
The authors attributed lower photosynthetic rate to reduced pigment and stomatal factors.
- Taxon
- RiceOryza sativat0
- Outcome
- reduced photosynthetic ratee0
- Qualifier
- both chlorophyll contents and stomae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced photosynthetic rate was attributed to both chlorophyll contents and stoma”
t0“Rice Under Drip Irrigation with Plastic Film Mulching”
Claim · model-written summary
Lower pigment content was proposed to reduce light harvesting and PSⅡ conversion efficiency.
- Taxon
- RiceOryza sativat0
- Outcome
- 1ower light-harvesting capacity and photochemical conversion efficiencies of the PSⅡ reaction centere0
- Qualifier
- Lower photosynthetic pigments contentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lower photosynthetic pigments contents might be the main factor to low leaf photosynthetic rate which directly leads to 1ower light-harvesting capacity and photochemical conversion efficiencies of the PSⅡ reaction center”
t0“Rice Under Drip Irrigation with Plastic Film Mulching”
Claim · model-written summary
The authors inferred membrane lipid peroxidation and cell membrane damage under drip irrigation.
- Taxon
- RiceOryza sativat0
- Treatment
- drip irrigation with plastic film mulchinge0
- Outcome
- membrane lipid peroxidation,and cell membrane damagee0
- Qualifier
- to some degreee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drip irrigation with plastic film mulching resulted in membrane lipid peroxidation,and cell membrane damage to some degree”
t0“Rice Under Drip Irrigation with Plastic Film Mulching”
Claim · model-written summary
The authors inferred osmolyte accumulation and enhanced drought tolerance under drip irrigation.
- Taxon
- RiceOryza sativat0
- Outcome
- drought tolerancee0
- Direction
- enhancede0
- Qualifier
- osmolytes accumulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“activated osmolytes accumulation thus enhanced its drought tolerance”
t0“Rice Under Drip Irrigation with Plastic Film Mulching”
Claim · model-written summary
Effective panicle number and seed setting rate were significantly reduced under drip irrigation.
- Taxon
- RiceOryza sativat0
- Treatment
- drip irrigation with plastic film mulchinge0
- Outcome
- Effective panicle number per unit area and seed setting ratee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effective panicle number per unit area and seed setting rate under drip irrigation with plastic film mulching were significantly reduced”
t0“Rice”
Claim · model-written summary
Seed production declined under drip irrigation.
- Taxon
- RiceOryza sativat0
- Treatment
- drip irrigation with plastic film mulchinge0
- Outcome
- seed productione0
- Direction
- declinede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed setting rate under drip irrigation with plastic film mulching were significantly reduced,leading to a declined seed production”
t0“Rice”
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See all 1,171 papers →8 of 10 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.