Abstract
With three different salt tolerance Brassica napus inbred lines 2205(strong salt-tolerant),487(medium salt-tolerant)and 1423(sensitive)seedlings as tested materials,we studied the variation of several physiological indexes(the contents of MDA,soluble sugar,betaine and chlorophyll)after NaCl treatments 0(CK),60 mmol·L-1(low salt),120 mmol·L-1(mid-low salt),180 mmol·L-1(medium salt),240mmol·L-1(high salt)and its relationship with salt resistance in the 5-leaf stage by soil culture and hydroponics,to provide theoretical guidance for the evaluation of rapeseed salt tolerance.The results showed that:(1)Leaf MDA content under low salt and mid-low salt stress reduced and significantly lower than that of CK(no salt stress),under medium salt and high salt stress significantly increased,and the content in2205 is the lowest and increase the minimum,while the content in 1423 is the highest and furthest.(2)Leaf soluble sugar content reduced under low salt and mid-low salt stress,(but for 2205 that is significantly higher than that of CK under mid-low salt stress),increased under medium salt and high salt stress and is significantly higher than that of CK.The soluble sugar content is the highest level and the biggest increase in 2205,and significantly higher than that in 487 and 1423.while the soluble sugar content is the lowest and the smallest increase in 1423.(3)The betaine content increased with the increase of concentration of NaCl.The content were significantly increased in 2205 and 487above the mid-low concentration of salt stress,only raised significantly in 1423 under high salt stress.The content is the most and the highest levels in 2205 and the lowest and the smallest increase in 1423.(4)Leaf chlorophyll content increased significantly under low salt and mid-low salt stress,of which is the highest levels in 2205 and the biggest increase.The chlorophyll content significantly reduced under medium salt and high salt stress,especially under high salt stress the chlorophyll content is low,of which is the lowest and highest reduce in 1423.This study can be concluded that below the mid-low salt concentration(120mmol·L-1),NaCl stress may promote the rape seedling growth;above the medium salt concentration(180mmol·L-1),rape seedling growth was significantly inhibited,rapeseed will be more severe injuries with the higher NaCl concentration.At rapeseed seedling growth stage,the physiological indicators changed significantly when NaCl stress concentration at the 120-180mmol·L-1;this concentration range may be suitable for the identification of salt resistance strength.Various physiological indicators showed that 2205 with strong salt resistance,1423 with the worst salt resistance,which are consistent with the actual performance of germination stage and seedling stage result.
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Claims 15
Claim · model-written summary
Leaf MDA content under low and mid-low NaCl stress was significantly lower than in the no-salt control.
- Taxon
- Brassica napus
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Organ / stage
- Leafe1
- Treatment
- low salt and mid-low salt stresse1
- Outcome
- Leaf MDA contente1
- Direction
- reducede1
- Comparator
- CK(no salt stress)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
t0“Physiological Effects on Brassica napus Seedlings under NaCl Stress”
e1“Leaf MDA content under low salt and mid-low salt stress reduced and significantly lower than that of CK(no salt stress)”
Claim · model-written summary
Leaf MDA content under medium and high NaCl stress significantly increased relative to the no-salt control.
- Taxon
- Brassica napusBrassica napust0
- Treatment
- medium salt and high salt stresse2
- Outcome
- Leaf MDA contente1
- Direction
- significantly increasede2
- Comparator
- CK(no salt stress)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological Effects on Brassica napus Seedlings under NaCl Stress”
e1“Leaf MDA content under low salt and mid-low salt stress reduced and significantly lower than that of CK(no salt stress)”
e2“under medium salt and high salt stress significantly increased”
Claim · model-written summary
Inbred line 2205 had the lowest leaf MDA increase, and line 1423 the highest, under NaCl stress.
- Taxon
- Brassica napusBrassica napust0
- Material
- 2205e3
- Outcome
- MDA contente1
- Direction
- the loweste3
- Comparator
- 1423e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological Effects on Brassica napus Seedlings under NaCl Stress”
e1“Leaf MDA content under low salt and mid-low salt stress reduced and significantly lower than that of CK(no salt stress)”
e3“the content in2205 is the lowest and increase the minimum, while the content in 1423 is the highest and furthest”
Claim · model-written summary
Leaf soluble sugar content reduced under low and mid-low NaCl stress.
- Taxon
- Brassica napusBrassica napust0
- Treatment
- low salt and mid-low salt stresse4
- Outcome
- Leaf soluble sugar contente4
- Direction
- reducede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological Effects on Brassica napus Seedlings under NaCl Stress”
e4“Leaf soluble sugar content reduced under low salt and mid-low salt stress”
Claim · model-written summary
Leaf soluble sugar content increased under medium and high NaCl stress, significantly above the no-salt control.
- Taxon
- Brassica napusBrassica napust0
- Treatment
- medium salt and high salt stresse5
- Outcome
- Leaf soluble sugar contente4
- Direction
- increasede5
- Comparator
- CKe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological Effects on Brassica napus Seedlings under NaCl Stress”
e4“Leaf soluble sugar content reduced under low salt and mid-low salt stress”
e5“increased under medium salt and high salt stress and is significantly higher than that of CK”
Claim · model-written summary
Inbred line 2205 had the highest soluble sugar content and biggest increase under NaCl stress, above 487 and 1423.
- Taxon
- Brassica napusBrassica napust0
- Material
- 2205e6
- Outcome
- soluble sugar contente6
- Direction
- the highest levele6
- Comparator
- 487 and 1423e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological Effects on Brassica napus Seedlings under NaCl Stress”
e6“The soluble sugar content is the highest level and the biggest increase in 2205,and significantly higher than that in 487 and 1423”
Claim · model-written summary
Betaine content increased with increasing NaCl concentration.
- Taxon
- Brassica napusBrassica napust0
- Treatment
- increase of concentration of NaCle7
- Outcome
- betaine contente7
- Direction
- increasede7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological Effects on Brassica napus Seedlings under NaCl Stress”
e7“The betaine content increased with the increase of concentration of NaCl”
Claim · model-written summary
Betaine content in lines 2205 and 487 significantly increased above the mid-low NaCl concentration.
- Taxon
- Brassica napusBrassica napust0
- Material
- 2205 and 487e2
- Treatment
- above the mid-low concentration of salt stresse2
- Outcome
- betaine contente7
- Direction
- significantly increasede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological Effects on Brassica napus Seedlings under NaCl Stress”
e7“The betaine content increased with the increase of concentration of NaCl”
e2“The content were significantly increased in 2205 and 487above the mid-low concentration of salt stress”
Claim · model-written summary
Betaine content in line 1423 was raised significantly only under high NaCl stress.
- Taxon
- Brassica napusBrassica napust0
- Material
- 1423e2
- Treatment
- high salt stresse2
- Outcome
- betaine contente7
- Direction
- raised significantlye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological Effects on Brassica napus Seedlings under NaCl Stress”
e7“The betaine content increased with the increase of concentration of NaCl”
e2“only raised significantly in 1423 under high salt stress”
Claim · model-written summary
Leaf chlorophyll content increased significantly under low and mid-low NaCl stress.
- Taxon
- Brassica napusBrassica napust0
- Treatment
- low salt and mid-low salt stresse1
- Outcome
- Leaf chlorophyll contente1
- Direction
- increased significantlye1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological Effects on Brassica napus Seedlings under NaCl Stress”
e1“Leaf chlorophyll content increased significantly under low salt and mid-low salt stress”
Claim · model-written summary
Chlorophyll content significantly reduced under medium and high NaCl stress.
- Taxon
- Brassica napusBrassica napust0
- Treatment
- medium salt and high salt stresse1
- Outcome
- chlorophyll contente1
- Direction
- significantly reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological Effects on Brassica napus Seedlings under NaCl Stress”
e1“The chlorophyll content significantly reduced under medium salt and high salt stress”
Claim · model-written summary
NaCl at or below 120 mmol/L may promote rape seedling growth.
- Taxon
- Brassica napusBrassica napust0
- Treatment
- below the mid-low salt concentration(120mmol·L-1)e1
- Outcome
- rape seedling growthe1
- Direction
- promotee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological Effects on Brassica napus Seedlings under NaCl Stress”
e1“below the mid-low salt concentration(120mmol·L-1), NaCl stress may promote the rape seedling growth”
Claim · model-written summary
NaCl above 180 mmol/L significantly inhibited rape seedling growth.
- Taxon
- Brassica napusBrassica napust0
- Treatment
- above the medium salt concentration(180mmol·L-1)e1
- Outcome
- rape seedling growthe1
- Direction
- significantly inhibitede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological Effects on Brassica napus Seedlings under NaCl Stress”
e1“above the medium salt concentration(180mmol·L-1), rape seedling growth was significantly inhibited”
Claim · model-written summary
The 120-180 mmol/L NaCl range may be suitable for identifying salt resistance strength in rapeseed.
- Taxon
- Brassica napusBrassica napust0
- Outcome
- identification of salt resistance strengthe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological Effects on Brassica napus Seedlings under NaCl Stress”
e1“this concentration range may be suitable for the identification of salt resistance strength”
Claim · model-written summary
Line 2205 showed strong salt resistance and line 1423 the worst salt resistance.
- Taxon
- Brassica napusBrassica napust0
- Material
- 2205e1
- Outcome
- salt resistancee1
- Direction
- stronge1
- Comparator
- 1423e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological Effects on Brassica napus Seedlings under NaCl Stress”
e1“Various physiological indicators showed that 2205 with strong salt resistance,1423 with the worst salt resistance”
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