Abstract
The osmotic and ion-specific components of salt-induced inhibition of leaf expansion growth were investigated in beans grown from 12 h to several days in either NaCl-containing solution cultures, an isosmotic concentrated macronutrient solution, or a vermiculite–compost mixture with low Na+ but high Cl– availability. Inhibition of leaf expansion and leaf ABA increase was more intense in the NaCl than in the isosmotic macronutrient treatment. Root Na+ was highly correlated to inhibition of leaf expansion and leaf or xylem sap ABA. When Na+ was sequestered in soil, salinized plants showed no reduction in leaf expansion or ABA increase, regardless of the presence of high leaf Cl– concentrations. Stomatal conductance exhibited an exponential relationship with the reciprocal value of xylem sap ABA. Our results indicate that an ion-specific effect caused by Na+ in roots may account for an ABA-mediated reponse of both stomatal closure and leaf expansion inhibition.
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Claims 5
Claim · model-written summary
Inhibition of leaf expansion and the leaf ABA increase were more intense in NaCl than in an isosmotic macronutrient solution.
- Taxon
- Phaseolus vulgaris
Phaseolus vulgarist0 - Treatment
- NaCle0
- Outcome
- Inhibition of leaf expansion and leaf ABA increasee0
- Direction
- more intensee0
- Comparator
- isosmotic macronutrient treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Phaseolus vulgaris”
e0“Inhibition of leaf expansion and leaf ABA increase was more intense in the NaCl than in the isosmotic macronutrient treatment”
Claim · model-written summary
Root Na+ was highly correlated with inhibition of leaf expansion and with leaf or xylem sap ABA.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Organ / stage
- Roote1
- Compound
- Na+e1
- Outcome
- inhibition of leaf expansione1
- Direction
- increaseinferrede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Phaseolus vulgaris”
e1“Root Na+ was highly correlated to inhibition of leaf expansion and leaf or xylem sap ABA”
Claim · model-written summary
When Na+ was sequestered in soil, salinized plants showed no reduction in leaf expansion or ABA increase.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Treatment
- sequestered in soile2
- Outcome
- reduction in leaf expansion or ABA increasee2
- Direction
- no reductione2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Phaseolus vulgaris”
e2“When Na+ was sequestered in soil, salinized plants showed no reduction in leaf expansion or ABA increase”
Claim · model-written summary
Stomatal conductance had an exponential relationship with the reciprocal value of xylem sap ABA.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Compound
- ABAe3
- Outcome
- Stomatal conductancee3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Phaseolus vulgaris”
e3“Stomatal conductance exhibited an exponential relationship with the reciprocal value of xylem sap ABA”
Claim · model-written summary
An ion-specific effect of Na+ in roots may account for the ABA-mediated response of both stomatal closure and leaf expansion inhibition.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarist0
- Compound
- Na+e4
- Outcome
- stomatal closure and leaf expansion inhibitione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Phaseolus vulgaris”
e4“an ion-specific effect caused by Na+ in roots may account for an ABA-mediated reponse of both stomatal closure and leaf expansion inhibition”
The same questions in other papers
sodium chloride · disease · Phaseolus vulgaris (common bean)Results agree
2 papers in the same direction as this paper
- no effect
- negative
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.