Abstract
To examine the response of three rapeseed varieties to salinity stress, a pot experiment was conducted in a glasshouse using a factorial experiment based on a randomized complete block design with three replications. Three levels of NaCl (0, 100 and 200 mM NaCl) were imposed as the salinity treatments at root establishment (leaf 4) stage. In this study, sodium (Na+) and potassium (K+) concentrations and K+/Na+ ratio were compared in different tissues in three varieties of rapeseed (PP-401-15E, Hyola401 and Hyola60) known to differ in salt tolerance, 30 days after salt treatment commencement. Effect of salinity was significant on all measured characters. The decline in shoot and root biomass and grain yield of salt sensitive genotype (PP-401-15E), were higher than those of the salt tolerants (Hyola401 and Hyola602) in response to salt stress. It seemed that the decrease in shoot biomass was primarily due to the osmotic effect of the salt, rather than the Na+-specific effects. The salt tolerant genotypes accumulated smaller quantities of Na+ in the shoot and root, indicating that the degree of salt tolerance in these genotypes depend upon the degree of salt exclusion from the plants. The salt sensitive genotype maintained a smaller K+/Na+ ratios in youngest fully expanded leaf than the salt tolerant genotypes. The ion partitioning capability in rape, thus, can considerably improve its salt tolerance. Relative membrane permeability was more notably increased in 200 mM NaCl in sensitive genotype (PP-401-15E) than the tolerant ones, and hence, can be used as selection criteria for improving salt tolerance.
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Claims 9
Claim · model-written summary
Salt stress caused a larger decline in shoot biomass in sensitive PP-401-15E than in tolerant genotypes.
- Taxon
- Rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Material
- PP-401-15Ee0
- Treatment
- salt stresse0
- Outcome
- shoote0
- Direction
- highere0
- Comparator
- salt tolerants (Hyola401 and Hyola602)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“The decline in shoot and root biomass and grain yield of salt sensitive genotype (PP-401-15E), were higher than those of the salt tolerants (Hyola401 and Hyola602) in response to salt stress.”
t0“Rape Genotypes (Brassica napus L.)”
Claim · model-written summary
Salt stress caused a larger decline in root biomass in sensitive PP-401-15E than in tolerant genotypes.
- Taxon
- RapeBrassica napust0
- Material
- PP-401-15Ee0
- Treatment
- salt stresse0
- Outcome
- decline in shoot and root biomasse0
- Direction
- highere0
- Comparator
- salt tolerants (Hyola401 and Hyola602)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The decline in shoot and root biomass and grain yield of salt sensitive genotype (PP-401-15E), were higher than those of the salt tolerants (Hyola401 and Hyola602) in response to salt stress.”
t0“Rape Genotypes (Brassica napus L.)”
Claim · model-written summary
Salt stress caused a larger decline in grain yield in sensitive PP-401-15E than in tolerant genotypes.
- Taxon
- RapeBrassica napust0
- Material
- PP-401-15Ee0
- Treatment
- salt stresse0
- Outcome
- grain yielde0
- Direction
- highere0
- Comparator
- salt tolerants (Hyola401 and Hyola602)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The decline in shoot and root biomass and grain yield of salt sensitive genotype (PP-401-15E), were higher than those of the salt tolerants (Hyola401 and Hyola602) in response to salt stress.”
t0“Rape Genotypes (Brassica napus L.)”
Claim · model-written summary
The authors attributed the shoot biomass decrease primarily to osmotic effects of salt.
- Taxon
- RapeBrassica napust0
- Outcome
- the decrease in shoot biomass was primarily due to the osmotic effect of the salt, rather than the Na+-specific effectse0
- Qualifier
- osmotic effect of the salte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the decrease in shoot biomass was primarily due to the osmotic effect of the salt, rather than the Na+-specific effects”
t0“Rape Genotypes (Brassica napus L.)”
Claim · model-written summary
Salt-tolerant genotypes accumulated less sodium in shoot and root.
- Taxon
- RapeBrassica napust0
- Material
- salt tolerant genotypese0
- Organ / stage
- shoot and roote0
- Outcome
- The salt tolerant genotypes accumulated smaller quantities of Na+ in the shoot and roote0
- Direction
- smallere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The salt tolerant genotypes accumulated smaller quantities of Na+ in the shoot and root”
t0“Rape Genotypes (Brassica napus L.)”
Claim · model-written summary
The sensitive genotype had a lower K+/Na+ ratio in its youngest expanded leaf than tolerant genotypes.
- Taxon
- RapeBrassica napust0
- Organ / stage
- youngest fully expanded leafe0
- Outcome
- The salt sensitive genotype maintained a smaller K+/Na+ ratios in youngest fully expanded leaf than the salt tolerant genotypes.e0
- Direction
- smallere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The salt sensitive genotype maintained a smaller K+/Na+ ratios in youngest fully expanded leaf than the salt tolerant genotypes.”
t0“Rape Genotypes (Brassica napus L.)”
Claim · model-written summary
At 200 mM NaCl, membrane permeability increased more in the sensitive genotype than tolerant ones.
- Taxon
- RapeBrassica napust0
- Material
- PP-401-15Ee0
- Treatment
- 200 mM NaCle0
- Outcome
- Relative membrane permeabilitye0
- Direction
- increasede0
- Comparator
- tolerant onese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative membrane permeability was more notably increased in 200 mM NaCl in sensitive genotype (PP-401-15E) than the tolerant ones”
t0“Rape Genotypes (Brassica napus L.)”
Claim · model-written summary
The authors proposed relative membrane permeability as a selection criterion for salt tolerance.
- Taxon
- RapeBrassica napust0
- Outcome
- can be used as selection criteria for improving salt tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“can be used as selection criteria for improving salt tolerance”
t0“Rape Genotypes (Brassica napus L.)”
Claim · model-written summary
The authors linked salt tolerance to salt exclusion and ion partitioning.
- Taxon
- rapeBrassica napuse0
- Outcome
- The ion partitioning capability in rape, thus, can considerably improve its salt tolerance.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ion partitioning capability in rape, thus, can considerably improve its salt tolerance.”
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See all 79 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.