Abstract
Plants are exposed to various environmental stresses during their life cycle such as salt, drought and cold. Natural variation mediated plant growth adaptation has been employed as an effective approach in response to the diverse environmental cues such as salt stress. However, the molecular mechanism underlying this process is not well understood. In the present study, a collection of 82 Arabidopsis thaliana accessions (ecotypes) was screened with a view to identify variation for salinity tolerance. Seven accessions showed a higher level of tolerance than Col-0. The young seedlings of the tolerant accessions demonstrated a higher K(+) content and a lower Na(+)/K(+) ratio when exposed to salinity stress, but its Na(+) content was the same as that of Col-0. The K(+) transporter genes AtHAK5, AtCHX17 and AtKUP1 were up-regulated significantly in almost all the tolerant accessions, even in the absence of salinity stress. There was little genetic variation or positive transcriptional variation between the selections and Col-0 with respect to Na+-related transporter genes, as AtSOS genes, AtNHX1 and AtHKT1;1. In addition, under salinity stress, these selections accumulated higher compatible solutes and lower reactive oxygen species than did Col-0. Taken together, our results showed that natural variation in salinity tolerance of Arabidopsis seems to have been achieved by the strong capacity of K(+) retention.
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Claims 9
Claim · model-written summary
Seven of 82 Arabidopsis accessions showed a higher level of salinity tolerance than Col-0.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianae0 - Material
- Seven accessionse1
- Outcome
- level of tolerancee1
- Direction
- highere1
- Comparator
- Col-0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a collection of 82 Arabidopsis thaliana accessions (ecotypes) was screened with a view to identify variation for salinity tolerance”
e1“Seven accessions showed a higher level of tolerance than Col-0”
Claim · model-written summary
Tolerant accessions of young seedlings under salinity stress had higher K(+) content.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Material
- tolerant accessionse2
- Organ / stage
- young seedlingse2
- Treatment
- salinity stresse2
- Outcome
- K(+) contente2
- Direction
- highere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a collection of 82 Arabidopsis thaliana accessions (ecotypes) was screened with a view to identify variation for salinity tolerance”
e2“The young seedlings of the tolerant accessions demonstrated a higher K(+) content and a lower Na(+)/K(+) ratio when exposed to salinity stress”
Claim · model-written summary
Tolerant accessions of young seedlings under salinity stress had a lower Na(+)/K(+) ratio.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Material
- tolerant accessionse2
- Organ / stage
- young seedlingse2
- Treatment
- salinity stresse2
- Outcome
- Na(+)/K(+) ratioe2
- Direction
- lowere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a collection of 82 Arabidopsis thaliana accessions (ecotypes) was screened with a view to identify variation for salinity tolerance”
e2“The young seedlings of the tolerant accessions demonstrated a higher K(+) content and a lower Na(+)/K(+) ratio when exposed to salinity stress”
Claim · model-written summary
Under salinity stress, the Na(+) content of the tolerant accessions was the same as that of Col-0.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Treatment
- salinity stresse3
- Outcome
- Na(+) contente3
- Direction
- no_changeinferrede3
- Comparator
- Col-0e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a collection of 82 Arabidopsis thaliana accessions (ecotypes) was screened with a view to identify variation for salinity tolerance”
e3“when exposed to salinity stress, but its Na(+) content was the same as that of Col-0”
Claim · model-written summary
Under salinity stress, the selections accumulated higher compatible solutes than Col-0.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Material
- selectionse4
- Treatment
- salinity stresse4
- Outcome
- compatible solutese4
- Direction
- highere4
- Comparator
- Col-0e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a collection of 82 Arabidopsis thaliana accessions (ecotypes) was screened with a view to identify variation for salinity tolerance”
e4“under salinity stress, these selections accumulated higher compatible solutes and lower reactive oxygen species than did Col-0”
Claim · model-written summary
Under salinity stress, the selections had lower reactive oxygen species than Col-0.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Material
- selectionse4
- Treatment
- salinity stresse4
- Outcome
- reactive oxygen speciese4
- Direction
- lowere4
- Comparator
- Col-0e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a collection of 82 Arabidopsis thaliana accessions (ecotypes) was screened with a view to identify variation for salinity tolerance”
e4“under salinity stress, these selections accumulated higher compatible solutes and lower reactive oxygen species than did Col-0”
Claim · model-written summary
The K(+) transporter genes AtHAK5, AtCHX17 and AtKUP1 were significantly up-regulated in almost all tolerant accessions, even without salinity stress.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Material
- tolerant accessionse5
- Gene
- AtHAK5, AtCHX17 and AtKUP1e5
- Outcome
- up-regulated significantlye5
- Direction
- up-regulatede5
- Qualifier
- even in the absence of salinity stresse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a collection of 82 Arabidopsis thaliana accessions (ecotypes) was screened with a view to identify variation for salinity tolerance”
e5“The K(+) transporter genes AtHAK5, AtCHX17 and AtKUP1 were up-regulated significantly in almost all the tolerant accessions, even in the absence of salinity stress”
Claim · model-written summary
Na(+)-related transporter genes (AtSOS genes, AtNHX1 and AtHKT1;1) showed little genetic or transcriptional variation between the selections and Col-0.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Material
- selectionse6
- Gene
- AtSOS genes, AtNHX1 and AtHKT1;1e6
- Outcome
- little genetic variation or positive transcriptional variatione6
- Comparator
- Col-0e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a collection of 82 Arabidopsis thaliana accessions (ecotypes) was screened with a view to identify variation for salinity tolerance”
e6“There was little genetic variation or positive transcriptional variation between the selections and Col-0 with respect to Na+-related transporter genes, as AtSOS genes, AtNHX1 and AtHKT1;1”
Claim · model-written summary
Natural variation in salinity tolerance of Arabidopsis is proposed to be achieved by strong K(+) retention.
- Taxon
- ArabidopsisArabidopsise7
- Outcome
- natural variation in salinity tolerancee7
- Qualifier
- strong capacity of K(+) retentione7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“natural variation in salinity tolerance of Arabidopsis seems to have been achieved by the strong capacity of K(+) retention”
The same questions in other papers
salinity · molecular: metabolites · Arabidopsis thaliana (thale cress)Positive and negative results
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See all 10 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.