Abstract
Abstract Maintaining Na + /K + homeostasis is a critical feature for plant survival under salt stress, which depends on the operation of Na + and K + transporters. Although some K + transporters mediating root K + uptake have been reported to be essential to the maintenance of Na + /K + homeostasis, the effect of K + long‐distance translocation via phloem on plant salt tolerance remains unclear. Here, we provide physiological and genetic evidence of the involvement of phloem‐localized OsAKT2 in rice salt tolerance. OsAKT2 is a K + channel permeable to K + but not to Na + . Under salt stress, a T‐DNA knock‐out mutant, osakt2 and two CRISPR lines showed a more sensitive phenotype and higher Na + accumulation than wild type. They also contained more K + in shoots but less K + in roots, showing higher Na + /K + ratios. Disruption of OsAKT2 decreases K + concentration in phloem sap and inhibits shoot‐to‐root redistribution of K + . In addition, OsAKT2 also regulates the translocation of K + and sucrose from old leaves to young leaves, and affects grain shape and yield. These results indicate that OsAKT2‐mediated K + redistribution from shoots to roots contributes to maintenance of Na + /K + homeostasis and inhibition of root Na + uptake, providing novel insights into the roles of K + transporters in plant salt tolerance.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. 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 12
Claim · model-written summary
OsAKT2 channel passed K+ but not Na+.
- Taxon
- Rice
Oryza sativat0 - Gene
- OsAKT2e0
- Outcome
- permeable to K + but not to Na +e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“OsAKT2 is a K + channel permeable to K + but not to Na +”
Claim · model-written summary
OsAKT2 knockout and CRISPR lines were more salt-sensitive than wild type.
- Taxon
- RiceOryza sativat0
- Material
- osakt2 and two CRISPR linese0
- Treatment
- salt stresse0
- Gene
- osakt2e0
- Outcome
- sensitive phenotypee0
- Direction
- more sensitivee0
- Comparator
- wild typee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Under salt stress, a T‐DNA knock‐out mutant, osakt2 and two CRISPR lines showed a more sensitive phenotype and higher Na + accumulation than wild type”
Claim · model-written summary
Mutant and CRISPR lines accumulated more Na+ than wild type under salt stress.
- Taxon
- RiceOryza sativat0
- Treatment
- salt stresse0
- Gene
- osakt2e0
- Outcome
- Na + accumulatione0
- Direction
- highere0
- Comparator
- wild typee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Under salt stress, a T‐DNA knock‐out mutant, osakt2 and two CRISPR lines showed a more sensitive phenotype and higher Na + accumulation than wild type”
Claim · model-written summary
OsAKT2-disrupted lines had more K+ in shoots.
- Taxon
- RiceOryza sativat0
- Gene
- OsAKT2e1
- Outcome
- K + in shootse0
- Direction
- moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“They also contained more K + in shoots but less K + in roots”
e1“OsAKT2 is a K + channel permeable to K + but not to Na +”
Claim · model-written summary
OsAKT2-disrupted lines had less K+ in roots.
- Taxon
- RiceOryza sativat0
- Gene
- OsAKT2e1
- Outcome
- K + in rootse0
- Direction
- lesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“They also contained more K + in shoots but less K + in roots”
e1“OsAKT2 is a K + channel permeable to K + but not to Na +”
Claim · model-written summary
OsAKT2-disrupted lines had higher Na+/K+ ratios.
- Taxon
- RiceOryza sativat0
- Gene
- OsAKT2e1
- Outcome
- Na + /K + ratiose0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“showing higher Na + /K + ratios”
e1“OsAKT2 is a K + channel permeable to K + but not to Na +”
Claim · model-written summary
Disrupting OsAKT2 decreased K+ in phloem sap.
- Taxon
- RiceOryza sativat0
- Treatment
- Disruption of OsAKT2e0
- Gene
- OsAKT2e0
- Outcome
- K + concentration in phloem sape0
- Direction
- decreasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Disruption of OsAKT2 decreases K + concentration in phloem sap”
Claim · model-written summary
Disrupting OsAKT2 inhibited shoot-to-root K+ redistribution.
- Taxon
- RiceOryza sativat0
- Treatment
- Disruption of OsAKT2e0
- Gene
- OsAKT2e0
- Outcome
- shoot‐to‐root redistribution of K +e0
- Direction
- inhibitse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Disruption of OsAKT2 decreases K + concentration in phloem sap and inhibits shoot‐to‐root redistribution of K +”
Claim · model-written summary
OsAKT2 regulates K+ and sucrose movement from old to young leaves.
- Taxon
- RiceOryza sativat0
- Gene
- OsAKT2e0
- Outcome
- translocation of K + and sucrose from old leaves to young leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“OsAKT2 also regulates the translocation of K + and sucrose from old leaves to young leaves”
Claim · model-written summary
OsAKT2 affects grain shape and yield.
- Taxon
- RiceOryza sativat0
- Gene
- OsAKT2e0
- Outcome
- grain shape and yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“OsAKT2 also regulates the translocation of K + and sucrose from old leaves to young leaves, and affects grain shape and yield”
Claim · model-written summary
Authors infer OsAKT2-mediated K+ redistribution helps maintain Na+/K+ homeostasis.
- Taxon
- RiceOryza sativat0
- Gene
- OsAKT2e0
- Outcome
- maintenance of Na + /K + homeostasise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“OsAKT2‐mediated K + redistribution from shoots to roots contributes to maintenance of Na + /K + homeostasis and inhibition of root Na + uptake”
Claim · model-written summary
Authors infer OsAKT2-mediated K+ redistribution inhibits root Na+ uptake.
- Taxon
- RiceOryza sativat0
- Gene
- OsAKT2e0
- Outcome
- inhibition of root Na + uptakee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“OsAKT2‐mediated K + redistribution from shoots to roots contributes to maintenance of Na + /K + homeostasis and inhibition of root Na + uptake”
The same questions in other papers
loss of function · molecular: metabolites · Oryza sativa (rice)Positive and negative results
52 papers in the same direction as this paper · 18 in the opposite direction
- negative
- negative
- positive
67 papers more in this group
See all 71 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.