Abstract
Soil salinity in many parts of the world has become a very serious problem. Increasing soil salinity is one of the major abiotic factors limiting crop production in these regions. Therefore, growing salinity tolerant plants is a suitable way to optimize the use of saline soils. Ziziphus spina-christi (L) Willd is a fruit tree that grows wild in arid and semi-arid areas of south and southwest of Iran. The present study intends to illustrate the effect of salinity on the response of two genotypes of Ziziphus spina-christi to salt stress. The experiments were conducted in a completely randomized design as a factorial. Factor one was salinity (1.8, 5.8, 10.2, or 16.2 dS m−1 NaCl) and the second factor was two genotypes and four replicates for each experimental unit. After 10 months, the results showed a significant decrease in all studied vegetative characteristics (stem height, total leaves area, shoot and root dry weight, chlorophyll index and number of leaves per plants) with increasing the salt concentrations. However, this decrease was not of the same extent for both genotypes. Low levels of salinity (5.8 dS m−1) did not cause a substantial inhibition of growth but increasing concentrations of salt induced a progressive decline in vegetative characteristics. Potassium (K), phosphorus (p), and the K/Na ratio of leaves in both genotypes significantly decreased with increasing the salt concentrations. Leaves of genotype 2 displayed higher the K/Na ratio and K content than genotype 1 in saline and non-saline conditions. In both genotypes, proline increased with salt concentration. The proline also was significantly higher in the leaves of genotype 2 than genotype 1.
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Claims 8
Claim · model-written summary
Stem height, total leaf area and shoot and root dry weight decreased significantly with increasing NaCl salinity.
- Taxon
- Ziziphus Spina-christi
Ziziphus spina-christit0 - Treatment
- increasing the salt concentrationse1
- Outcome
- stem height, total leaves area, shoot and root dry weighte1
- Direction
- decreasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Ziziphus Spina-christi”
e1“a significant decrease in all studied vegetative characteristics (stem height, total leaves area, shoot and root dry weight, chlorophyll index and number of leaves per plants) with increasing the salt concentrations”
Claim · model-written summary
Chlorophyll index and number of leaves per plant decreased significantly with increasing NaCl salinity.
- Taxon
- Ziziphus Spina-christiZiziphus spina-christit0
- Treatment
- increasing the salt concentrationse1
- Outcome
- chlorophyll index and number of leaves per plantse1
- Direction
- decreasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Ziziphus Spina-christi”
e1“a significant decrease in all studied vegetative characteristics (stem height, total leaves area, shoot and root dry weight, chlorophyll index and number of leaves per plants) with increasing the salt concentrations”
Claim · model-written summary
The salinity-induced decrease in vegetative characteristics was not of the same extent in the two genotypes.
- Taxon
- Ziziphus Spina-christiZiziphus spina-christit0
- Material
- both genotypese1
- Outcome
- this decrease was not of the same extente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Ziziphus Spina-christi”
e1“this decrease was not of the same extent for both genotypes”
Claim · model-written summary
Low salinity (5.8 dS m−1) did not cause substantial inhibition of growth.
- Taxon
- Ziziphus Spina-christiZiziphus spina-christit0
- Treatment
- salinity (5.8 dS m−1)e1
- Outcome
- growthe1
- Direction
- did not cause a substantial inhibitione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Ziziphus Spina-christi”
e1“Low levels of salinity (5.8 dS m−1) did not cause a substantial inhibition of growth”
Claim · model-written summary
Leaf potassium, phosphorus and K/Na ratio decreased significantly with increasing salt concentration in both genotypes.
- Taxon
- Ziziphus Spina-christiZiziphus spina-christit0
- Organ / stage
- leavese1
- Treatment
- increasing the salt concentrationse1
- Outcome
- Potassium (K), phosphorus (p), and the K/Na ratioe1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Ziziphus Spina-christi”
e1“Potassium (K), phosphorus (p), and the K/Na ratio of leaves in both genotypes significantly decreased with increasing the salt concentrations”
Claim · model-written summary
Leaves of genotype 2 had a higher K/Na ratio and K content than genotype 1 under saline and non-saline conditions.
- Taxon
- Ziziphus Spina-christiZiziphus spina-christit0
- Material
- genotype 2e1
- Organ / stage
- Leavese1
- Outcome
- K/Na ratio and K contente1
- Direction
- highere1
- Comparator
- genotype 1e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Ziziphus Spina-christi”
e1“Leaves of genotype 2 displayed higher the K/Na ratio and K content than genotype 1 in saline and non-saline conditions”
Claim · model-written summary
Proline increased with salt concentration in both genotypes.
- Taxon
- Ziziphus Spina-christiZiziphus spina-christit0
- Treatment
- salt concentratione1
- Outcome
- prolinee1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Ziziphus Spina-christi”
e1“In both genotypes, proline increased with salt concentration”
Claim · model-written summary
Leaf proline was significantly higher in genotype 2 than in genotype 1.
- Taxon
- Ziziphus Spina-christiZiziphus spina-christit0
- Material
- genotype 2e1
- Organ / stage
- leavese1
- Outcome
- prolinee1
- Direction
- highere1
- Comparator
- genotype 1e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Ziziphus Spina-christi”
e1“The proline also was significantly higher in the leaves of genotype 2 than genotype 1”
The same questions in other papers
salinity · growth · Ziziphus spina-christi (Christ's thorn jujube)Results agree
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- negative
- negative
- negative
salinity · physiology: pigments · Ziziphus spina-christi (Christ's thorn jujube)Results agree
3 papers in the same direction as this paper
- negative
- negative
- 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.