Abstract
The physiological response of two soybean varieties to salt stress was examined. The results showed that salt stress induced a significantly (p<0.01) lower decrease of the net photosynthetic rate (P N) in salt-tolerant S111-9 than in salt-sensitive Glycine max. P N decrease was positively related to the decrease of stomatal conductance (g s) and intercellular CO2 concentration (C i) in S111-9, while with g s in G. max. a threshold of relative water content (RWC) was found, above which a slight decrease in RWC lead to a sharp reduction in g s. The photochemical quenching (qP), the efficiency of open PSII centers (ΦPSII) and the Rubisco activity (RA) significantly decreased with increasing salinity level in G. max. The maximum PSII quantum yield (Fv/Fm) decreased significantly under the highest NaCl in both varieties. The higher reduction of RA in G. max was attributed to Rubisco content, which was mainly regulated at LSU expression level rather than at rbcL transcript level. These findings led us to conclude that the salt-induced reduction in P N was mainly due g s and RA for S111-9 and G. max, respective
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Claims 9
Claim · model-written summary
Salt stress caused a significantly smaller decline in net photosynthetic rate in S111-9 than in Glycine max.
- Taxon
- soybean
Glycine maxt0 - Material
- S111-9e0
- Treatment
- salt stresse0
- Outcome
- net photosynthetic ratee0
- Direction
- lower decreasee0
- Comparator
- Glycine maxe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salt stress induced a significantly (p<0.01) lower decrease of the net photosynthetic rate (P N) in salt-tolerant S111-9 than in salt-sensitive Glycine max”
t0“soybean”
Claim · model-written summary
The decline in photosynthesis was positively related to declines in stomatal conductance and intercellular CO2 in S111-9.
- Taxon
- soybeanGlycine maxt0
- Material
- S111-9e0
- Outcome
- P N decreasee0
- Qualifier
- decrease of stomatal conductance (g s) and intercellular CO2 concentration (C i)e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P N decrease was positively related to the decrease of stomatal conductance (g s) and intercellular CO2 concentration (C i) in S111-9”
t0“soybean”
Claim · model-written summary
The decline in photosynthesis was related to stomatal conductance in G. max.
- Taxon
- soybeanGlycine maxt0
- Material
- G. maxe0
- Outcome
- g se0
- Qualifier
- while with g se0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while with g s in G. max”
t0“soybean”
Claim · model-written summary
Above a relative-water-content threshold, a slight decline in water content sharply reduced stomatal conductance.
- Taxon
- soybeanGlycine maxt0
- Outcome
- g se0
- Direction
- reductione0
- Qualifier
- above which a slight decrease in RWCe0
Not reportedOrgan / stage
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a threshold of relative water content (RWC) was found, above which a slight decrease in RWC lead to a sharp reduction in g s”
t0“soybean”
Claim · model-written summary
Increasing salinity significantly reduced photochemical quenching, open PSII-center efficiency and Rubisco activity in G. max.
- Taxon
- soybeanGlycine maxt0
- Material
- G. maxe0
- Treatment
- increasing salinity levele0
- Outcome
- photochemical quenching (qP), the efficiency of open PSII centers (ΦPSII) and the Rubisco activity (RA)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The photochemical quenching (qP), the efficiency of open PSII centers (ΦPSII) and the Rubisco activity (RA) significantly decreased with increasing salinity level in G. max”
t0“soybean”
Claim · model-written summary
The highest NaCl level significantly reduced maximum PSII quantum yield in both varieties.
- Taxon
- soybeanGlycine maxt0
- Treatment
- highest NaCle0
- Outcome
- maximum PSII quantum yield (Fv/Fm)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum PSII quantum yield (Fv/Fm) decreased significantly under the highest NaCl in both varieties”
t0“soybean”
Claim · model-written summary
The larger Rubisco activity reduction in G. max was attributed to Rubisco content, regulated mainly at LSU expression level.
- Taxon
- soybeanGlycine maxt0
- Material
- G. maxe0
- Gene
- LSUe0
- Outcome
- reduction of RAe0
- Qualifier
- rather than at rbcL transcript levele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The higher reduction of RA in G. max was attributed to Rubisco content, which was mainly regulated at LSU expression level rather than at rbcL transcript level”
t0“soybean”
Claim · model-written summary
The authors attributed salt-induced photosynthesis reduction mainly to stomatal conductance in S111-9.
- Taxon
- soybeanGlycine maxt0
- Material
- S111-9e0
- Outcome
- reduction in P Ne0
- Qualifier
- g se0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the salt-induced reduction in P N was mainly due g s and RA for S111-9 and G. max, respective”
t0“soybean”
Claim · model-written summary
The authors attributed salt-induced photosynthesis reduction mainly to Rubisco activity in G. max.
- Taxon
- soybeanGlycine maxt0
- Material
- G. maxe0
- Gene
- RAe0
- Outcome
- reduction in P Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the salt-induced reduction in P N was mainly due g s and RA for S111-9 and G. max, respective”
t0“soybean”
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See all 37 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.