Abstract
Rice is considered sensitive to salinity and hence, improving the salinity tolerance of rice is desired to increase productivity. Most research on salinity tolerance for the growth and grain yield of rice focuses on the toxicity of sodium (Na+) and not chloride (Cl−); the information on the negative effects of Cl− on rice is still limited. To learn the difference in the long-term effects of Na+ and Cl− on the whole plant and grain productivities, three rice varieties differing in salinity tolerance were grown in pots irrigated by water with NaCl and KCl in the same molar concentration. The whole plant dry weight and grain yield in all varieties decreased to the same extent after NaCl and KCl treatments compared to the control during the full heading and maturity stages. However, Na+ content in shoots of all varieties under NaCl treatment were higher at all stages than that under KCl treatment and the control. In the most cases, the Cl− content in plants was similar in the NaCl and KCl treatment groups. There was a negative significant correlation between the relative dry weight and grain yield (treated/control) and the Cl− content in the plants. From these results, it was suggested that plant dry weight and grain yield under long-term salinity conditions was reduced by Cl− toxicity rather than Na+ toxicity.
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Claims 7
Claim · model-written summary
Both NaCl and KCl reduced whole plant dry weight to a similar extent across rice varieties.
- Taxon
- rice
Oryza sativat0 - Organ / stage
- full heading and maturity stagese0
- Treatment
- NaCl and KCl treatmentse0
- Outcome
- whole plant dry weighte0
- Direction
- decreasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The whole plant dry weight and grain yield in all varieties decreased to the same extent after NaCl and KCl treatments compared to the control during the full heading and maturity stages”
t0“Rice Under Long-Term Saline Conditions”
Claim · model-written summary
Both NaCl and KCl reduced grain yield to a similar extent across rice varieties.
- Taxon
- riceOryza sativat0
- Organ / stage
- full heading and maturity stagese0
- Treatment
- NaCl and KCl treatmentse0
- Outcome
- grain yielde0
- Direction
- decreasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The whole plant dry weight and grain yield in all varieties decreased to the same extent after NaCl and KCl treatments compared to the control during the full heading and maturity stages”
t0“Rice Under Long-Term Saline Conditions”
Claim · model-written summary
NaCl treated rice had higher shoot sodium content than KCl treated and control rice at all stages.
- Taxon
- riceOryza sativat0
- Organ / stage
- shootse0
- Treatment
- NaCl treatmente0
- Outcome
- Na+ content in shootse0
- Direction
- highere0
- Comparator
- KCl treatment and the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Na+ content in shoots of all varieties under NaCl treatment were higher at all stages than that under KCl treatment and the control”
t0“Rice Under Long-Term Saline Conditions”
Claim · model-written summary
Rice plant chloride content was generally similar under NaCl and KCl.
- Taxon
- riceOryza sativat0
- Treatment
- NaCl and KCl treatment groupse0
- Outcome
- Cl− content in plantse0
- Direction
- similare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Cl− content in plants was similar in the NaCl and KCl treatment groups”
t0“Rice Under Long-Term Saline Conditions”
Claim · model-written summary
Rice chloride content was significantly negatively correlated with relative dry weight.
- Taxon
- riceOryza sativat0
- Compound
- Cl−e0
- Outcome
- relative dry weighte0
- Direction
- negativee0
- Comparator
- treated/controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a negative significant correlation between the relative dry weight and grain yield (treated/control) and the Cl− content in the plants”
t0“Rice Under Long-Term Saline Conditions”
Claim · model-written summary
Rice chloride content was significantly negatively correlated with relative grain yield.
- Taxon
- riceOryza sativat0
- Compound
- Cl−e0
- Outcome
- grain yielde0
- Direction
- negativee0
- Comparator
- treated/controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a negative significant correlation between the relative dry weight and grain yield (treated/control) and the Cl− content in the plants”
t0“Rice Under Long-Term Saline Conditions”
Claim · model-written summary
The authors attributed dry weight and yield loss under long term salinity to chloride toxicity rather than sodium toxicity.
- Taxon
- riceOryza sativat0
- Compound
- Cl−e0
- Outcome
- plant dry weight and grain yielde0
- Direction
- reducede0
- Qualifier
- rather than Na+ toxicitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant dry weight and grain yield under long-term salinity conditions was reduced by Cl− toxicity rather than Na+ toxicity”
t0“Rice Under Long-Term Saline Conditions”
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