Abstract
Soil salinity is one of the important abiotic stress factors that affect rice productivity and quality. Research with several dicotyledonous plants indicated that the detrimental effects associated with salinity stress can (partly) be overcome by the external application of antioxidative substances. For instance, sodium selenate (Na2SeO4) significantly improved the growth and productivity of several crops under various abiotic stress conditions. At present there is no report describing the impact of Na2SeO4 on salinity stressed cereals such as rice. Rice cultivation is threatened by increasing salinity stress, and in future this problem will further be aggravated by global warming and sea level rise, impacting coastal areas. The current study reports on the effect of Na2SeO4 in alleviating salinity stress in rice plants. The optimal concentration of Na2SeO4 and the most efficient mode of selenium application were investigated. Selenium, sodium and potassium contents in leaves were determined. Antioxidant enzyme activities as well as proline, hydrogen peroxide, and malondialdehyde concentrations were analyzed. In addition, the transcript levels for OsNHX1, an important Na+/H+ antiporter, were quantified. Treatment of 2-week-old rice plants under 150 mM NaCl stress with 6 mg l–1 Na2SeO4 improved the total biomass. A significantly higher biomass was observed for the plants that received Na2SeO4 by a combination of seed priming and foliar spray compared to the individual treatments. The Na2SeO4 application enhanced the activity of antioxidant enzymes (SOD, APX, CAT and GSH-Px), increased the proline content, and reduced hydrogen peroxide and malondialdehyde concentrations in plants under NaCl stress. These biochemical changes were accompanied by increased transcript levels for OsNHX1 resulting in a higher K+/Na+ ratio in the rice plants under NaCl stress. The results suggest that Na2SeO4 treatment alleviates the adverse effect of salinity on rice plant growth through enhancing the antioxidant defense system and increase of OsNHX1 transcript levels.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Sodium selenate improved rice biomass under salt stress.
- Taxon
- rice
Oryza sativae0 - Treatment
- 6 mg l–1 Na2SeO4e0
- Outcome
- total biomasse0
- Direction
- improvede0
- Qualifier
- 150 mM NaCl stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment of 2-week-old rice plants under 150 mM NaCl stress with 6 mg l–1 Na2SeO4 improved the total biomass”
Claim · model-written summary
Combined seed priming and foliar spray produced more biomass than either individual treatment.
- Taxon
- RiceOryza sativat0
- Treatment
- Na2SeO4 by a combination of seed priming and foliar spraye0
- Outcome
- biomasse0
- Direction
- highere0
- Comparator
- individual treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significantly higher biomass was observed for the plants that received Na2SeO4 by a combination of seed priming and foliar spray compared to the individual treatments”
t0“Rice”
Claim · model-written summary
Sodium selenate enhanced antioxidant enzyme activity under salt stress.
- Taxon
- RiceOryza sativat0
- Treatment
- Na2SeO4 applicatione0
- Outcome
- activity of antioxidant enzymes (SOD, APX, CAT and GSH-Px)e0
- Direction
- enhancede0
- Qualifier
- NaCl stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Na2SeO4 application enhanced the activity of antioxidant enzymes (SOD, APX, CAT and GSH-Px), increased the proline content, and reduced hydrogen peroxide and malondialdehyde concentrations in plants under NaCl stress”
t0“Rice”
Claim · model-written summary
Sodium selenate increased proline under salt stress.
- Taxon
- RiceOryza sativat0
- Treatment
- Na2SeO4 applicatione0
- Outcome
- proline contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Na2SeO4 application enhanced the activity of antioxidant enzymes (SOD, APX, CAT and GSH-Px), increased the proline content, and reduced hydrogen peroxide and malondialdehyde concentrations in plants under NaCl stress”
t0“Rice”
Claim · model-written summary
Sodium selenate reduced hydrogen peroxide and malondialdehyde concentrations under salt stress.
- Taxon
- RiceOryza sativat0
- Treatment
- Na2SeO4 applicatione0
- Outcome
- hydrogen peroxide and malondialdehyde concentrationse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Na2SeO4 application enhanced the activity of antioxidant enzymes (SOD, APX, CAT and GSH-Px), increased the proline content, and reduced hydrogen peroxide and malondialdehyde concentrations in plants under NaCl stress”
t0“Rice”
Claim · model-written summary
Sodium selenate increased OsNHX1 transcripts under salt stress.
- Taxon
- riceOryza sativae0
- Treatment
- Sodium Selenate Treatmentt0
- Gene
- OsNHX1e0
- Outcome
- transcript levels for OsNHX1e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These biochemical changes were accompanied by increased transcript levels for OsNHX1 resulting in a higher K+/Na+ ratio in the rice plants under NaCl stress”
t0“Sodium Selenate Treatment”
Claim · model-written summary
The treated rice plants had a higher potassium to sodium ratio under salt stress.
- Taxon
- riceOryza sativae0
- Treatment
- Sodium Selenate Treatmentt0
- Outcome
- K+/Na+ ratioe0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These biochemical changes were accompanied by increased transcript levels for OsNHX1 resulting in a higher K+/Na+ ratio in the rice plants under NaCl stress”
t0“Sodium Selenate Treatment”
The same questions in other papers
seed treatment · growth · Oryza sativa (rice)Positive and negative results
229 papers in the same direction as this paper · 15 in the opposite direction
- negative
- no effect
- negative
241 papers more in this group
See all 245 papers →application · growth · Oryza sativa (rice)Positive and negative results
273 papers in the same direction as this paper · 36 in the opposite direction · 3 reporting no difference from an alternative
- negative
- negative
- no effect
309 papers more in this group
See all 313 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.