Abstract
Salt-tolerant wheat cultivar ‘DK961’ and salt-sensitive wheat cultivar ‘LM15’ were used to investigate the characteristics of Na + and K + uptake and correlation with salt tolerance. Results showed that K + uptake kinetics of roots was fitted to the Michaelis-Menten equation, namely V=V max ×[S]/([S]+K m )+k×[S], for both cultivars. Low concentration NaCl (25 mmol·L -1 ) treatment significantly enhanced high-affinity K + uptake system, and the effects on ‘DK961’ was stronger than that on ‘LM15’. High-affinity K + uptake of wheat roots possibly is driven by K + /H + symporter instead of K + /Na + symporter. NaCl treatment inhibited low-affinity K + uptake system, and the effects on ‘LM15’ was stronger than that on ‘DK961’. The K + content in roots and leaves significantly decreased in response to NaCl stress, while the Na + content significantly increased under NaCl stress. Under NaCl stress, K + content in roots and leaves of ‘DK961’ was significantly higher than that of ‘LM15’, and the Na + content of roots in ‘DK961’ was significantly higher than that in ‘LM15’. However, leaf Na + content of ‘DK961’ was significantly lower than that of ‘LM15’ under NaCl stress. Therefore, K + /Na + ratio in leaves of ‘DK961’ was higher than that in ‘LM15’ in response to NaCl stress. NSCCs (non-selective cation channels) are the main pathways for Na + uptake, and K + channels mediate Na + uptake. These results suggested that wheat enhanced salt tolerance partly via regulating root K + uptake system contributed to high K + /Na + ratio of leaves.
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Claims 15
Claim · model-written summary
Root K + uptake kinetics fit the Michaelis-Menten equation in both cultivars.
- Taxon
- Wheat
Triticum aestivumt0 - Outcome
- K + uptake kinetics of rootse0
- Qualifier
- for both cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K + uptake kinetics of roots was fitted to the Michaelis-Menten equation, namely V=V max ×[S]/([S]+K m )+k×[S], for both cultivars.”
t0“Wheat”
Claim · model-written summary
Low NaCl enhanced high-affinity root K + uptake.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- NaCl (25 mmol·L -1 ) treatmente0
- Outcome
- high-affinity K + uptake systeme0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low concentration NaCl (25 mmol·L -1 ) treatment significantly enhanced high-affinity K + uptake system”
t0“Wheat”
Claim · model-written summary
The enhancement of high-affinity K + uptake by low NaCl was stronger in DK961 than LM15.
- Taxon
- WheatTriticum aestivumt0
- Material
- ‘DK961’e0
- Outcome
- the effects on ‘DK961’e0
- Direction
- strongere0
- Comparator
- ‘LM15’e0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects on ‘DK961’ was stronger than that on ‘LM15’.”
t0“Wheat”
Claim · model-written summary
High-affinity root K + uptake may be driven by the K + /H + symporter rather than the K + /Na + symporter.
- Taxon
- WheatTriticum aestivumt0
- Gene
- K + /H + symportere0
- Outcome
- High-affinity K + uptake of wheat rootse0
- Qualifier
- possiblye0
- Comparator
- K + /Na + symportere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High-affinity K + uptake of wheat roots possibly is driven by K + /H + symporter instead of K + /Na + symporter.”
t0“Wheat”
Claim · model-written summary
NaCl inhibited low-affinity K + uptake.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- NaCl treatmente0
- Outcome
- low-affinity K + uptake systeme0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NaCl treatment inhibited low-affinity K + uptake system”
t0“Wheat”
Claim · model-written summary
NaCl inhibition of low-affinity K + uptake was stronger in LM15 than DK961.
- Taxon
- WheatTriticum aestivumt0
- Material
- ‘LM15’e0
- Outcome
- the effects on ‘LM15’e0
- Direction
- strongere0
- Comparator
- ‘DK961’e0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects on ‘LM15’ was stronger than that on ‘DK961’.”
t0“Wheat”
Claim · model-written summary
Root and leaf K + content declined under NaCl stress.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- roots and leavese0
- Treatment
- NaCl stresse0
- Outcome
- K + content in roots and leavese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The K + content in roots and leaves significantly decreased in response to NaCl stress”
t0“Wheat”
Claim · model-written summary
Na + content increased under NaCl stress.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- NaCl stresse0
- Outcome
- Na + contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Na + content significantly increased under NaCl stress.”
t0“Wheat”
Claim · model-written summary
Under NaCl stress, DK961 had higher root and leaf K + content than LM15.
- Taxon
- WheatTriticum aestivumt0
- Material
- ‘DK961’e0
- Treatment
- NaCl stresse0
- Outcome
- K + content in roots and leavese0
- Direction
- highere0
- Comparator
- ‘LM15’e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under NaCl stress, K + content in roots and leaves of ‘DK961’ was significantly higher than that of ‘LM15’”
t0“Wheat”
Claim · model-written summary
Under NaCl stress, DK961 had higher root Na + content than LM15.
- Taxon
- WheatTriticum aestivumt0
- Material
- ‘DK961’e0
- Outcome
- Na + content of rootse0
- Direction
- highere0
- Comparator
- ‘LM15’e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Na + content of roots in ‘DK961’ was significantly higher than that in ‘LM15’.”
t0“Wheat”
Claim · model-written summary
Under NaCl stress, DK961 had lower leaf Na + content than LM15.
- Taxon
- WheatTriticum aestivumt0
- Material
- ‘DK961’e0
- Treatment
- NaCl stresse0
- Outcome
- leaf Na + contente0
- Direction
- lowere0
- Comparator
- ‘LM15’e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf Na + content of ‘DK961’ was significantly lower than that of ‘LM15’ under NaCl stress.”
t0“Wheat”
Claim · model-written summary
Under NaCl stress, leaf K + /Na + ratio was higher in DK961 than LM15.
- Taxon
- WheatTriticum aestivumt0
- Material
- ‘DK961’e0
- Treatment
- NaCl stresse0
- Outcome
- K + /Na + ratio in leavese0
- Direction
- highere0
- Comparator
- ‘LM15’e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K + /Na + ratio in leaves of ‘DK961’ was higher than that in ‘LM15’ in response to NaCl stress.”
t0“Wheat”
Claim · model-written summary
NSCCs were identified as the main route of Na + uptake.
- Taxon
- WheatTriticum aestivumt0
- Gene
- NSCCs (non-selective cation channels)e0
- Outcome
- Na + uptakee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NSCCs (non-selective cation channels) are the main pathways for Na + uptake”
t0“Wheat”
Claim · model-written summary
K + channels mediate Na + uptake.
- Taxon
- WheatTriticum aestivumt0
- Gene
- K + channelse0
- Outcome
- Na + uptakee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K + channels mediate Na + uptake.”
t0“Wheat”
Claim · model-written summary
Regulation of root K + uptake was suggested to partly enhance wheat salt tolerance through a high leaf K + /Na + ratio.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- salt tolerancee0
- Qualifier
- regulating root K + uptake systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat enhanced salt tolerance partly via regulating root K + uptake system contributed to high K + /Na + ratio of leaves.”
t0“Wheat”
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