Abstract
Potassium (K+) nutrition and salt tolerance are key factors controlling plant productivity. However, the mechanisms by which plants regulate K+ nutrition and salt tolerance are poorly understood. We report here the identification of an Arabidopsis thaliana mutant, sos3 (salt-overly-sensitive 3), which is hypersensitive to Na+ and Li+ stresses. The mutation is recessive and is in a nuclear gene that maps to chromosome V. The sos3 mutation also renders the plant unable to grow on low K+. Surprisingly, increased extracellular Ca2+ suppresses the growth defect of sos3 plants on low K+ or 50 mM NaCl. In contrast, high concentrations of external Ca2+ do not rescue the growth of the salt-hypersensitive sos1 mutant on low K+ or 50 mM NaCl. Under NaCl stress, sos3 seedlings accumulated more Na+ and less K+ than the wild type. Increased external Ca2+ improved K+/Na+ selectivity of both sos3 and wild-type plants. However, this Ca2+ effect in sos3 is more than twice as much as that in the wild type. In addition to defining the first plant mutant with an altered calcium response, these results demonstrate that the SOS3 locus is essential for K+ nutrition, K+/Na+ selectivity, and salt tolerance in higher plants.
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 8
Claim · model-written summary
The sos3 mutant was hypersensitive to Na+ and Li+ stress.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianae0 - Material
- sos3e0
- Outcome
- hypersensitive to Na+ and Li+ stressese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arabidopsis thaliana mutant, sos3 (salt-overly-sensitive 3), which is hypersensitive to Na+ and Li+ stresses”
t0“An Arabidopsis mutant that requires increased calcium for potassium nutrition and salt tolerance”
Claim · model-written summary
The sos3 mutation was recessive and mapped to chromosome V.
- Taxon
- ArabidopsisArabidopsist0
- Gene
- nuclear genee0
- Outcome
- recessivee0
- Qualifier
- chromosome Ve0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mutation is recessive and is in a nuclear gene that maps to chromosome V”
t0“An Arabidopsis mutant that requires increased calcium for potassium nutrition and salt tolerance”
Claim · model-written summary
The sos3 mutation prevented growth on low K+.
- Taxon
- ArabidopsisArabidopsist0
- Material
- sos3e0
- Outcome
- unable to grow on low K+e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sos3 mutation also renders the plant unable to grow on low K+”
t0“An Arabidopsis mutant that requires increased calcium for potassium nutrition and salt tolerance”
Claim · model-written summary
Increased extracellular Ca2+ suppressed the sos3 growth defect on low K+ or 50 mM NaCl.
- Taxon
- ArabidopsisArabidopsist0
- Material
- sos3e0
- Treatment
- increased extracellular Ca2+e0
- Outcome
- growth defecte0
- Direction
- suppressese0
- Qualifier
- low K+ or 50 mM NaCle0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased extracellular Ca2+ suppresses the growth defect of sos3 plants on low K+ or 50 mM NaCl”
t0“An Arabidopsis mutant that requires increased calcium for potassium nutrition and salt tolerance”
Claim · model-written summary
High external Ca2+ did not rescue sos1 growth on low K+ or 50 mM NaCl.
- Taxon
- ArabidopsisArabidopsist0
- Material
- sos1e0
- Treatment
- high concentrations of external Ca2+e0
- Outcome
- growthe0
- Direction
- do not rescuee0
- Qualifier
- low K+ or 50 mM NaCle0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high concentrations of external Ca2+ do not rescue the growth of the salt-hypersensitive sos1 mutant on low K+ or 50 mM NaCl”
t0“An Arabidopsis mutant that requires increased calcium for potassium nutrition and salt tolerance”
Claim · model-written summary
Under NaCl stress sos3 seedlings accumulated more Na+ than wild type.
- Taxon
- ArabidopsisArabidopsist0
- Material
- sos3e0
- Organ / stage
- seedlingse0
- Treatment
- NaCl stresse0
- Outcome
- Na+e0
- Direction
- moree0
- Comparator
- wild typee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under NaCl stress, sos3 seedlings accumulated more Na+ and less K+ than the wild type”
t0“An Arabidopsis mutant that requires increased calcium for potassium nutrition and salt tolerance”
Claim · model-written summary
Under NaCl stress sos3 seedlings accumulated less K+ than wild type.
- Taxon
- ArabidopsisArabidopsist0
- Material
- sos3e0
- Organ / stage
- seedlingse0
- Treatment
- NaCl stresse0
- Outcome
- K+e0
- Direction
- lesse0
- Comparator
- wild typee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under NaCl stress, sos3 seedlings accumulated more Na+ and less K+ than the wild type”
t0“An Arabidopsis mutant that requires increased calcium for potassium nutrition and salt tolerance”
Claim · model-written summary
Increased external Ca2+ improved K+/Na+ selectivity in sos3 and wild type, with an effect over twice as large in sos3.
- Taxon
- ArabidopsisArabidopsist0
- Material
- sos3e0
- Treatment
- Increased external Ca2+e0
- Outcome
- K+/Na+ selectivitye0
- Direction
- improvede0
- Value
- more than twice as muche0
- Comparator
- wild typee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased external Ca2+ improved K+/Na+ selectivity of both sos3 and wild-type plants. However, this Ca2+ effect in sos3 is more than twice as much as that in the wild type”
t0“An Arabidopsis mutant that requires increased calcium for potassium nutrition and salt tolerance”
The same questions in other papers
calcium(2+) · growth · ArabidopsisPositive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
1 paper more in this group
See all 5 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.