Abstract
The Longdong alfalfa(Medicago sativa L.) was used to determine the effect of alkali stress on germination and seedling growth of ultra-dried seeds.NaHCO3 and Na2CO3 were mixed in the ratio of 9∶1 for a typical alkali stress.Alkali concentration gradients of 0 mmol·L?1,2 mmol·L?1,5 mmol·L?1,15 mmol·L?1 and 25 mmol·L?1 were used in the germination test of non-ultra-dried seeds.The germination test showed 15 mmol·L?1 was the highest alkali concentration limit for Longdong alfalfa with significant stress effect.Silica gel was used to reduce the moisture content of alfalfa seeds to 7.09%,6.93%,6.36%,5.72%,5.46%,5.18% and 4.97% from an initial moisture content of 9.03%(CK).Next,a sand culture was developed to study the germination and seedling growth of different seeds under 15 mmol·L?1 alkali stress and neutral environments.The results showed that ultra-dried seeds with moisture contents of 6.93%～5.72% had better germination and seedling performance than CK under neutral environment.The 7-day seedling survival rate,17-day shoot height and 23-day leaf number were respectively 18.18%～22.73%,16.79%～32.49% and 15.65%～29.41% higher than those of CK.While seedlings of the ultra-dried seeds with 6.36%～5.46% moisture content performed obviously better in alkali stress compared with CK,the 7-day survival rate and 17-day shoot height were respectively 11.30%～30.66% and 1.64%～34.64% higher than those of CK.The 23-day leaf number was approximately 79.32%～98.24% of CK.The results suggested that ultra-drying pretreatment accelerated alfalfa seed germination and seedling growth under neutral and alkali stress.
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Claims 8
Claim · model-written summary
The highest alkali concentration limit for Longdong alfalfa germination was 15 mmol·L?1, with significant stress.
- Taxon
- alfalfa
Medicago sativat0 - Material
- Longdong alfalfae0
- Outcome
- highest alkali concentration limite0
- Value
- 15 mmol·L?1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The germination test showed 15 mmol·L?1 was the highest alkali concentration limit for Longdong alfalfa with significant stress effect.”
t0“alfalfa”
Claim · model-written summary
Ultra-dried seeds at 6.93%～5.72% moisture had better germination and seedling performance than CK under neutral conditions.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- ultra-dried seeds with moisture contents of 6.93%～5.72%e0
- Outcome
- germination and seedling performancee0
- Direction
- bettere0
- Comparator
- CKe0
- Setting
- neutral environmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that ultra-dried seeds with moisture contents of 6.93%～5.72% had better germination and seedling performance than CK under neutral environment.”
t0“alfalfa”
Claim · model-written summary
7-day seedling survival rate was 18.18%～22.73% higher than CK under neutral conditions.
- Taxon
- alfalfaMedicago sativat0
- Outcome
- 7-day seedling survival ratee0
- Direction
- highere0
- Value
- 18.18%～22.73%e0
- Comparator
- CKe0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 7-day seedling survival rate,17-day shoot height and 23-day leaf number were respectively 18.18%～22.73%,16.79%～32.49% and 15.65%～29.41% higher than those of CK.”
t0“alfalfa”
Claim · model-written summary
17-day shoot height was 16.79%～32.49% higher than CK under neutral conditions.
- Taxon
- alfalfaMedicago sativat0
- Outcome
- 17-day shoot heighte0
- Direction
- highere0
- Value
- 16.79%～32.49%e0
- Comparator
- CKe0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 7-day seedling survival rate,17-day shoot height and 23-day leaf number were respectively 18.18%～22.73%,16.79%～32.49% and 15.65%～29.41% higher than those of CK.”
t0“alfalfa”
Claim · model-written summary
23-day leaf number was 15.65%～29.41% higher than CK under neutral conditions.
- Taxon
- alfalfaMedicago sativat0
- Outcome
- 23-day leaf numbere0
- Direction
- highere0
- Value
- 15.65%～29.41%e0
- Comparator
- CKe0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 7-day seedling survival rate,17-day shoot height and 23-day leaf number were respectively 18.18%～22.73%,16.79%～32.49% and 15.65%～29.41% higher than those of CK.”
t0“alfalfa”
Claim · model-written summary
7-day survival rate was 11.30%～30.66% higher for ultra-dried seeds than CK under alkali stress.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- ultra-dried seeds with 6.36%～5.46% moisture contente0
- Outcome
- 7-day survival ratee0
- Direction
- highere0
- Value
- 11.30%～30.66%e0
- Qualifier
- alkali stresse0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“While seedlings of the ultra-dried seeds with 6.36%～5.46% moisture content performed obviously better in alkali stress compared with CK,the 7-day survival rate and 17-day shoot height were respectively 11.30%～30.66% and 1.64%～34.64% higher than those of CK.”
t0“alfalfa”
Claim · model-written summary
17-day shoot height was 1.64%～34.64% higher for ultra-dried seeds than CK under alkali stress.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- ultra-dried seeds with 6.36%～5.46% moisture contente0
- Outcome
- 17-day shoot heighte0
- Direction
- highere0
- Value
- 1.64%～34.64%e0
- Qualifier
- alkali stresse0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“While seedlings of the ultra-dried seeds with 6.36%～5.46% moisture content performed obviously better in alkali stress compared with CK,the 7-day survival rate and 17-day shoot height were respectively 11.30%～30.66% and 1.64%～34.64% higher than those of CK.”
t0“alfalfa”
Claim · model-written summary
Under alkali stress, 23-day leaf number was 79.32%～98.24% of CK.
- Taxon
- alfalfaMedicago sativat0
- Outcome
- 23-day leaf numbere0
- Value
- 79.32%～98.24%e0
- Comparator
- CKe0
Not reportedTreatmentDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 23-day leaf number was approximately 79.32%～98.24% of CK.”
t0“alfalfa”
The same questions in other papers
soil water · growth · Medicago sativa (alfalfa)Positive and negative results
2 papers in the same direction as this paper · 4 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- negative
- no effect
4 papers more in this group
See all 8 papers →soil water · survival · Medicago sativa (alfalfa)Results agree
1 paper in the same direction as this paper
- positive
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.