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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
3
|
| pubmed:dateCreated |
1997-5-29
|
| pubmed:abstractText |
Sos1 is an Arabidopsis thaliana mutant with > 20 times higher sensitivity toward Na+ inhibition due to a defective high-affinity potassium-uptake system. We report here that sos1 accumulates less Na+ than the wild type in response to NaCl stress. The Na+ contents in sos1 seedlings exposed to 25 mM NaCl for 2 or more d are about 43% lower than those in the wild type. When assayed at 20 mM external NaCl, sos1 seedlings pretreated with low potassium have 32% lower Na+ uptake than the wild type. However, little difference in Na+ uptake could be measured when the seedlings were not pretreated with low potassium. Low-potassium treatment was shown to induce high-affinity potassium-uptake activity in Arabidopsis seedlings. No substantial difference in Na+ efflux between sos1 and the wild type was detected. The results show that the reduced Na+ accumulation in sos1 is due to a lower Na+ influx rate. Therefore, the sos1 mutation appears to disrupt low-affinity Na+ uptake in addition to its impairment of high-affinity K+ uptake.
|
| pubmed:commentsCorrections |
http://linkedlifedata.com/resource/pubmed/commentcorrection/9085573-1657642,
http://linkedlifedata.com/resource/pubmed/commentcorrection/9085573-1662387,
http://linkedlifedata.com/resource/pubmed/commentcorrection/9085573-16653116,
http://linkedlifedata.com/resource/pubmed/commentcorrection/9085573-16656509,
http://linkedlifedata.com/resource/pubmed/commentcorrection/9085573-16668441,
http://linkedlifedata.com/resource/pubmed/commentcorrection/9085573-17769920,
http://linkedlifedata.com/resource/pubmed/commentcorrection/9085573-17837407,
http://linkedlifedata.com/resource/pubmed/commentcorrection/9085573-7502075,
http://linkedlifedata.com/resource/pubmed/commentcorrection/9085573-7809627,
http://linkedlifedata.com/resource/pubmed/commentcorrection/9085573-7919789,
http://linkedlifedata.com/resource/pubmed/commentcorrection/9085573-7937754,
http://linkedlifedata.com/resource/pubmed/commentcorrection/9085573-8065452
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
IM
|
| pubmed:chemical | |
| pubmed:status |
MEDLINE
|
| pubmed:month |
Mar
|
| pubmed:issn |
0032-0889
|
| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:volume |
113
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
795-9
|
| pubmed:dateRevised |
2010-9-10
|
| pubmed:meshHeading | |
| pubmed:year |
1997
|
| pubmed:articleTitle |
Reduced Na+ uptake in the NaCl-hypersensitive sos1 mutant of Arabidopsis thaliana.
|
| pubmed:affiliation |
Department of Plant Sciences, University of Arizona, Tucson 85721, USA.
|
| pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, Non-P.H.S.
|