Abstract
To elucidate the comparative effect of chloride and sulfate salinities on photosynthesis and yield components in rice, plants of Oryza sativa (cv. I Kong Pao (salt-sensitive)) were exposed in nutrient solutions to 20 mM Na2SO4 or 40 mM NaCl (electrical conductivity of c.a. 4.30 dS m−1 for both solutions) from seedlings to maturity stage. Both types of salt induced a strong decrease in net photosynthesis (AN) at the seedling and tillering stages, while the intercellular CO2 concentrations (Ci) remained unaffected. Instantaneous transpiration (E) and stomatal conductance (gs) decreased at the tillering and seedling stages, respectively, only in plants exposed to NaCl. Chloride salinity also strongly decreased photosynthetic pigments, while no impact was detected in response to Na2SO4. All yield-related parameters were affected by salinities, but NaCl was significantly more deleterious than Na2SO4 for the mean number of tillers produced per plant, spikelets sterility and non-viable pollen percentage. In contrast, both types of salinity similarly impacted the percentage of fertile tillers and 1000-grain weight. At the grain level, more than 90% of toxic ions (Na+, excess of Cl− and S6+) accumulated in the hulls, thus preserving the internal part of the caryopses from toxic ion injuries.
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Claims 11
Claim · model-written summary
Both salts strongly decreased net photosynthesis at seedling and tillering stages.
- Taxon
- Oryza sativa
Oryza sativat0 - Organ / stage
- seedling and tillering stagese0
- Treatment
- Both types of salte0
- Outcome
- net photosynthesis (AN)e0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both types of salt induced a strong decrease in net photosynthesis (AN) at the seedling and tillering stages”
t0“Oryza sativa L.”
Claim · model-written summary
Intercellular CO2 concentrations remained unaffected under both salts.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- NaCl and Na2SO4t0
- Outcome
- intercellular CO2 concentrations (Ci)e0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while the intercellular CO2 concentrations (Ci) remained unaffected”
t0“NaCl and Na2SO4 Salinities Have Different Impact on Photosynthesis and Yield-Related Parameters in Rice (Oryza sativa L.)”
Claim · model-written summary
NaCl decreased transpiration at tillering.
- Taxon
- Oryza sativaOryza sativat0
- Organ / stage
- tilleringe0
- Treatment
- NaCle0
- Outcome
- Instantaneous transpiration (E)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Instantaneous transpiration (E) and stomatal conductance (gs) decreased at the tillering and seedling stages, respectively, only in plants exposed to NaCl”
t0“Oryza sativa L.”
Claim · model-written summary
NaCl decreased stomatal conductance at seedling stage.
- Taxon
- Oryza sativaOryza sativat0
- Organ / stage
- seedlinge0
- Treatment
- NaCle0
- Outcome
- stomatal conductance (gs)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Instantaneous transpiration (E) and stomatal conductance (gs) decreased at the tillering and seedling stages, respectively, only in plants exposed to NaCl”
t0“Oryza sativa L.”
Claim · model-written summary
NaCl strongly decreased photosynthetic pigments.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- Chloride salinitye0
- Outcome
- photosynthetic pigmentse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chloride salinity also strongly decreased photosynthetic pigments”
t0“Oryza sativa L.”
Claim · model-written summary
Na2SO4 did not affect photosynthetic pigments.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- Na2SO4e0
- Outcome
- photosynthetic pigmentse0
- Direction
- no impacte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chloride salinity also strongly decreased photosynthetic pigments, while no impact was detected in response to Na2SO4”
t0“Oryza sativa L.”
Claim · model-written summary
NaCl was more deleterious than Na2SO4 for tiller number.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- NaCle0
- Outcome
- mean number of tillers produced per plante0
- Direction
- more deleteriouse0
- Comparator
- Na2SO4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NaCl was significantly more deleterious than Na2SO4 for the mean number of tillers produced per plant, spikelets sterility and non-viable pollen percentage”
t0“Oryza sativa L.”
Claim · model-written summary
NaCl was more deleterious than Na2SO4 for spikelet sterility.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- NaCle0
- Outcome
- spikelets sterilitye0
- Direction
- more deleteriouse0
- Comparator
- Na2SO4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NaCl was significantly more deleterious than Na2SO4 for the mean number of tillers produced per plant, spikelets sterility and non-viable pollen percentage”
t0“Oryza sativa L.”
Claim · model-written summary
NaCl was more deleterious than Na2SO4 for non-viable pollen percentage.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- NaCle0
- Outcome
- non-viable pollen percentagee0
- Direction
- more deleteriouse0
- Comparator
- Na2SO4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NaCl was significantly more deleterious than Na2SO4 for the mean number of tillers produced per plant, spikelets sterility and non-viable pollen percentage”
t0“Oryza sativa L.”
Claim · model-written summary
Both salts similarly affected fertile tiller percentage and thousand-grain weight.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- both types of salinitye0
- Outcome
- percentage of fertile tillers and 1000-grain weighte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both types of salinity similarly impacted the percentage of fertile tillers and 1000-grain weight”
t0“Oryza sativa L.”
Claim · model-written summary
More than 90% of toxic ions accumulated in grain hulls.
- Taxon
- Oryza sativaOryza sativat0
- Organ / stage
- hullse0
- Outcome
- toxic ions (Na+, excess of Cl− and S6+) accumulated in the hullse0
- Value
- more than 90%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more than 90% of toxic ions (Na+, excess of Cl− and S6+) accumulated in the hulls”
t0“Oryza sativa L.”
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See all 167 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.