Abstract
Selection strategies for increased salt tolerance in Medicago sativa must involve several growth stages, with the germination stage as a particularly important stage. At this stage, M. sativa is known to be more sensitive to salt than later growth stages. Cultivars differ significantly in their capacity to germinate under saline conditions. For this consideration and in order to analyze the response to salinity, initial screening at the germination stage for two varieties of M. sativa was undertaken. Seeds were germinated in Petri dishes under control treatment (0 mM NaCl) and four concentrations of NaCl (100, 150, 200 and 250 mM). Results from ANOVA showed that variation in root length (RL), fresh root weight (RFW) and shoot fresh weight (SFW) was explained by variety effect. The variation in hypocotyl length, (HL) SFW and RL was explained by the interaction of variety x treatment. Under salt stress, there was a major reduction (46, 66%) in final germination rate (GR) when seeds were geminated in 250 mM NaCl. The RL and HL were affected by salt stress and their respective values were reduced by more than 40% in 200 mM NaCl. The Californian variety was lesser affected by salt stress for RL and RFW while the local variety from El Hemma showed the lowest reduction for SFW. Further work is needed to asses these effects in later growth stages and in field conditions under salt stress.
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Claims 7
Claim · model-written summary
Variety explained variation in root length, fresh root weight and shoot fresh weight.
- Taxon
- Medicago sativa
Medicago sativat0 - Material
- varietye0
- Outcome
- root length (RL), fresh root weight (RFW) and shoot fresh weight (SFW)e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“variation in root length (RL), fresh root weight (RFW) and shoot fresh weight (SFW) was explained by variety effect”
t0“Medicago sativa”
Claim · model-written summary
The variety by treatment interaction explained hypocotyl length, shoot fresh weight and root length variation.
- Taxon
- Medicago sativaMedicago sativat0
- Material
- varietye0
- Treatment
- treatmente0
- Outcome
- hypocotyl length, (HL) SFW and RLe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“variation in hypocotyl length, (HL) SFW and RL was explained by the interaction of variety x treatment”
t0“Medicago sativa”
Claim · model-written summary
At 250 mM NaCl, final germination rate fell by 46% in one variety.
- Taxon
- Medicago sativaMedicago sativat0
- Treatment
- 250 mM NaCle0
- Outcome
- final germination rate (GR)e0
- Direction
- reductione0
- Value
- 46, 66%e0
- Comparator
- control treatment (0 mM NaCl)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“major reduction (46, 66%) in final germination rate (GR) when seeds were geminated in 250 mM NaCl”
e1“control treatment (0 mM NaCl)”
t0“Medicago sativa”
Claim · model-written summary
At 250 mM NaCl, final germination rate fell by 66% in the other variety.
- Taxon
- Medicago sativaMedicago sativat0
- Treatment
- 250 mM NaCle0
- Outcome
- final germination rate (GR)e0
- Direction
- reductione0
- Value
- 46, 66%e0
- Comparator
- control treatment (0 mM NaCl)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“major reduction (46, 66%) in final germination rate (GR) when seeds were geminated in 250 mM NaCl”
e1“control treatment (0 mM NaCl)”
t0“Medicago sativa”
Claim · model-written summary
Root length and hypocotyl length fell by more than 40% at 200 mM NaCl.
- Taxon
- Medicago sativaMedicago sativat0
- Treatment
- 200 mM NaCle0
- Outcome
- RL and HLe0
- Direction
- reducede0
- Value
- more than 40%e0
- Comparator
- control treatment (0 mM NaCl)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The RL and HL were affected by salt stress and their respective values were reduced by more than 40% in 200 mM NaCl”
e1“control treatment (0 mM NaCl)”
t0“Medicago sativa”
Claim · model-written summary
The Californian variety had less salt impact on root length and fresh root weight.
- Taxon
- Medicago sativaMedicago sativat0
- Material
- Californian varietye0
- Outcome
- RL and RFWe0
- Direction
- lesser affectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Californian variety was lesser affected by salt stress for RL and RFW”
t0“Medicago sativa”
Claim · model-written summary
The El Hemma local variety had the lowest reduction in shoot fresh weight.
- Taxon
- Medicago sativaMedicago sativat0
- Material
- local varietye0
- Outcome
- SFWe0
- Direction
- lowest reductione0
- Setting
- El Hemmae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the local variety from El Hemma showed the lowest reduction for SFW”
t0“Medicago sativa”
The same questions in other papers
sodium chloride · growth · Medicago sativa (alfalfa)Results differ
38 papers in the same direction as this paper · 4 in the opposite direction
- positive
- positive
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See all 43 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.