Abstract
With zhongleyou-2 and rongyou-11 of main rapes as test objects,a pot experiment was conducted to study on PSⅡphotochemical characteristics of rapes at seedling stage under waterlogging stress and recovery process.The result showed that minimum chlorophyll florescence(F0) and coefficient of non-photochemical quenching(qN) increased with waterlogging stress exacerbating,maximum chlorophyll florescence(Fm),the maximal quantum yield of PSⅡ(Fv/Fm),quantum yield of PSⅡ photochemistry(Yield),estimated electron transport rate(ETR) and coefficient of photochemical quenching(qP) had declined.This shows that the partial response center of PSⅡ was destructed,and photosynthetic electron transport was obstructed,and the conversion efficiency of light energy declined.It resulted in an obvious photoinhibition.Recovery processed from the 13th day,with F0 and qN declining slightly,Fm,Fv/Fm,Yield,ETR and qP increasing slightly,but all not recovering to control level.This showed that the partial photosynthetic organ had got the irreversible destruction.In the end the normal growth of rape had been affected,and waterlogging stress had exceeded the self-adjusting threshold of the ripe body.
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Claims 7
Claim · model-written summary
F0 and qN increased in rape seedlings as waterlogging stress worsened.
- Taxon
- Rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Treatment
- waterlogging stresse1
- Outcome
- minimum chlorophyll florescence(F0)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
t0“Rape”
e0“minimum chlorophyll florescence(F0) and coefficient of non-photochemical quenching(qN) increased with waterlogging stress exacerbating”
e1“under waterlogging stress and recovery process”
Claim · model-written summary
Fm, Fv/Fm and Yield declined under waterlogging stress.
- Taxon
- RapeBrassica napust0
- Treatment
- waterlogging stresse1
- Outcome
- maximum chlorophyll florescence(Fm)e0
- Direction
- declinede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rape”
e0“maximum chlorophyll florescence(Fm),the maximal quantum yield of PSⅡ(Fv/Fm),quantum yield of PSⅡ photochemistry(Yield),estimated electron transport rate(ETR) and coefficient of photochemical quenching(qP) had declined”
e1“under waterlogging stress and recovery process”
Claim · model-written summary
ETR and qP declined under waterlogging stress.
- Taxon
- RapeBrassica napust0
- Treatment
- waterlogging stresse1
- Outcome
- estimated electron transport rate(ETR)e0
- Direction
- declinede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rape”
e0“maximum chlorophyll florescence(Fm),the maximal quantum yield of PSⅡ(Fv/Fm),quantum yield of PSⅡ photochemistry(Yield),estimated electron transport rate(ETR) and coefficient of photochemical quenching(qP) had declined”
e1“under waterlogging stress and recovery process”
Claim · model-written summary
During recovery the chlorophyll fluorescence parameters improved slightly but did not return to control level.
- Taxon
- RapeBrassica napust0
- Treatment
- waterlogging stresse1
- Outcome
- F0 and qN declining slightlye0
- Direction
- declining slightlye0
- Comparator
- control levele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rape”
e0“Recovery processed from the 13th day,with F0 and qN declining slightly,Fm,Fv/Fm,Yield,ETR and qP increasing slightly,but all not recovering to control level”
e1“under waterlogging stress and recovery process”
Claim · model-written summary
Waterlogging destroyed part of the PSII reaction center.
- Taxon
- RapeBrassica napust0
- Treatment
- waterlogging stresse1
- Outcome
- partial response center of PSⅡe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rape”
e0“This shows that the partial response center of PSⅡ was destructed”
e1“under waterlogging stress and recovery process”
Claim · model-written summary
Waterlogging resulted in obvious photoinhibition.
- Taxon
- RapeBrassica napust0
- Treatment
- waterlogging stresse1
- Outcome
- photoinhibitione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rape”
e0“It resulted in an obvious photoinhibition”
e1“under waterlogging stress and recovery process”
Claim · model-written summary
Part of the photosynthetic organ suffered irreversible destruction.
- Taxon
- RapeBrassica napust0
- Treatment
- waterlogging stresse1
- Outcome
- irreversible destructione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rape”
e0“the partial photosynthetic organ had got the irreversible destruction”
e1“under waterlogging stress and recovery process”
The same questions in other papers
flooding · physiology: photosynthesis · Brassica napus (oilseed rape)Positive and negative results
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- positive
- negative
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5 papers more in this group
See all 9 papers →flooding · physiology: pigments · Brassica napus (oilseed rape)Results agree
2 papers in the same direction as this paper
- negative
- negative
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.