Abstract
In previous work, Nunes and Dias (1980) demonstrated that low sodium concentrations in the root medium of intact or decapitated young sugar beet plants grown under controlled conditions modified leaf water relations and increased leaf area and dry weight. The present study confirms these findings and presents further results concerning the effect of salt on the concentrations of the main osmotic substrates and on the structural and chemical fractions of the cell dry weight. Increases of water and turgor potentials (0.25 MPa and 0.4 MPa, respectively) and a small decrease in osmotic potential (0.16 MPa) were found in the leaves of salt treated plants. In these plants, osmotic potentials estimated from the concentration of ions and organic solutes in the leaf sap agree with those measured showing that the observed increase in sodium concentration may account for the small decrease in the osmotic potential. No changes were detected in the concentration of orthophosphate or malic acid but total acidity of the leaf sap from salt treated plants was significantly lower. It was found that all the main components of cell dry matter (total protein, soluble sugars, pigments and crude cell wall) contributed to the dry weight increase in the salt treated plants. Among the polysaccharide fractions of the cell wall, pectins increased significantly relative to hemicellulose and cellulose.
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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
Salt treatment increased leaf water potential by 0.25 MPa.
- Taxon
- Sugar Beet
Beta vulgaris subsp. vulgarist0 - Organ / stage
- leavese1
- Treatment
- salt treatede1
- Outcome
- watere0
- Direction
- Increasese0
- Value
- 0.25 MPae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increases of water and turgor potentials (0.25 MPa and 0.4 MPa, respectively)”
e1“leaves of salt treated plants”
t0“Sugar Beet Leaves”
Claim · model-written summary
Salt treatment increased leaf turgor potential by 0.4 MPa.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- salt treatede1
- Outcome
- turgor potentialse0
- Direction
- Increasese0
- Value
- 0.4 MPae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increases of water and turgor potentials (0.25 MPa and 0.4 MPa, respectively)”
e1“leaves of salt treated plants”
t0“Sugar Beet Leaves”
Claim · model-written summary
Salt treatment decreased leaf osmotic potential by 0.16 MPa.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- salt treatede0
- Outcome
- osmotic potentiale0
- Direction
- decreasee0
- Value
- 0.16 MPae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a small decrease in osmotic potential (0.16 MPa) were found in the leaves of salt treated plants.”
t0“Sugar Beet Leaves”
Claim · model-written summary
Osmotic potential estimated from leaf solutes agreed with measured osmotic potential.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Outcome
- osmotic potentialse0
- Qualifier
- concentration of ions and organic solutes in the leaf sape0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“osmotic potentials estimated from the concentration of ions and organic solutes in the leaf sap agree with those measured”
t0“Sugar Beet Leaves”
Claim · model-written summary
Salt-treated leaf sap showed no change in orthophosphate or malic acid concentration.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- salt treatede1
- Outcome
- concentration of orthophosphate or malic acide0
- Direction
- No changese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No changes were detected in the concentration of orthophosphate or malic acid”
e1“leaf sap from salt treated plants”
t0“Sugar Beet Leaves”
Claim · model-written summary
Salt treatment significantly lowered total acidity of leaf sap.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- salt treatede0
- Outcome
- total acidity of the leaf sape0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total acidity of the leaf sap from salt treated plants was significantly lower.”
t0“Sugar Beet Leaves”
Claim · model-written summary
Total protein, soluble sugars, pigments and crude cell wall contributed to the dry-weight increase in salt-treated plants.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- salt treatede0
- Outcome
- dry weight increasee0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all the main components of cell dry matter (total protein, soluble sugars, pigments and crude cell wall) contributed to the dry weight increase in the salt treated plants.”
t0“Sugar Beet Leaves”
Claim · model-written summary
Pectins increased significantly relative to hemicellulose and cellulose.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Outcome
- pectinse0
- Direction
- increasede0
- Comparator
- hemicellulose and cellulosee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pectins increased significantly relative to hemicellulose and cellulose.”
t0“Sugar Beet Leaves”
The same questions in other papers
salinity · molecular: metabolites · Beta vulgaris (beet)Positive and negative results
5 papers in the same direction as this paper · 7 in the opposite direction
- positive
- positive
- positive
9 papers more in this group
See all 13 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.