Abstract
The introduction of an active Na+ excretion system from salt-tolerant plants in salt-sensitive crop plants might necessitate enhancement of the robustness of K+ homeostasis and lead to improved plant growth under salt stress. To address this issue, we compared the acquisition and retention of K+ under excess Na+ concentrations in the common reed, which possesses excellent Na+ excretion ability, and low-Na+ excreting rice. Under excess Na+ concentrations, common reed maintained constant K+ content in all plant parts, whereas K+ content in rice decreased with increasing Na+ concentration. Preferential uptake of K+ against high Na+/K+ ratio in nutrient solution was approximately 10 times higher in common reed than in rice. The impact of excess Na+ on net K+ absorption rate of common reed was small. On the other hand, the net K+ absorption rate of rice was decreased by excess Na+ concentration. However, after the Na+ concentration in the nutrient solution was decreased from 50 to 1 mM, K+ absorption in rice recovered immediately. Thus, selectivity of K+ transporters or channels for K+ over Na+ in roots could be involved in the differences in K+ accumulation in rice and common reed.
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Claims 7
Claim · model-written summary
Under excess sodium, common reed maintained constant potassium content in all plant parts.
- Taxon
- common reed
Phragmites australise0 - Organ / stage
- all plant partse0
- Treatment
- excess Na+ concentrationse0
- Outcome
- K+ contente0
- Direction
- maintained constante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under excess Na+ concentrations, common reed maintained constant K+ content in all plant parts”
Claim · model-written summary
Under excess sodium, rice potassium content decreased as sodium concentration increased.
- Taxon
- rice
Oryza sativae0 - Treatment
- increasing Na+ concentratione0
- Outcome
- K+ contente0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K+ content in rice decreased with increasing Na+ concentration”
Claim · model-written summary
Preferential potassium uptake at high Na+/K+ was approximately tenfold greater in common reed than rice.
- Taxon
- common reedPhragmites australise0
- Outcome
- Preferential uptake of K+e0
- Direction
- highere0
- Value
- approximately 10 timese0
- Qualifier
- high Na+/K+ ratioe0
- Comparator
- ricee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Preferential uptake of K+ against high Na+/K+ ratio in nutrient solution was approximately 10 times higher in common reed than in rice”
Claim · model-written summary
Excess sodium had a small impact on net potassium absorption in common reed.
- Taxon
- common reedPhragmites australise0
- Treatment
- excess Na+e0
- Outcome
- net K+ absorption ratee0
- Qualifier
- smalle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The impact of excess Na+ on net K+ absorption rate of common reed was small”
Claim · model-written summary
Excess sodium decreased net potassium absorption rate in rice.
- Taxon
- riceOryza sativae0
- Treatment
- excess Na+ concentratione0
- Outcome
- net K+ absorption ratee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the net K+ absorption rate of rice was decreased by excess Na+ concentration”
Claim · model-written summary
Rice potassium absorption recovered immediately after nutrient-solution sodium fell from 50 to 1 mM.
- Taxon
- riceOryza sativae0
- Treatment
- Na+ concentration in the nutrient solution was decreased from 50 to 1 mMe0
- Outcome
- K+ absorptione0
- Direction
- recoverede0
- Value
- 50 to 1 mMe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“after the Na+ concentration in the nutrient solution was decreased from 50 to 1 mM, K+ absorption in rice recovered immediately”
Claim · model-written summary
The authors propose that root potassium transporter or channel selectivity could explain potassium accumulation differences between rice and common reed.
- Taxon
- riceOryza sativae0
- Organ / stage
- rootse0
- Outcome
- differences in K+ accumulatione0
- Qualifier
- selectivity of K+ transporters or channels for K+ over Na+e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“selectivity of K+ transporters or channels for K+ over Na+ in roots could be involved in the differences in K+ accumulation in rice and common reed”
The same questions in other papers
fertilization · physiology: ion balance · Oryza sativa (rice)Results agree
8 papers in the same direction as this paper
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See all 9 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.