Abstract
Twelve alfalfa genotypes that were selected for biomass under salinity, differences in Na and Cl concentrations in shoots and K/Na ratio were evaluated in this long-term salinity experiment. The selected plants were cloned to reduce genetic variability within each genotype. Salt tolerance (ST) index of the genotypes ranged from 0.39 to 1. The most salt-tolerant genotypes SISA14-1 (G03) and AZ-90ST (G10), the top performers for biomass, exhibited the least effect on shoot number and height. SISA14-1 (G03) accumulated low Na and Cl under salinity. Most genotypes exhibited a net reduction in shoot Ca, Mg, P, Fe, and Cu, while Mn and Zn increased under salinity. Salinity reduced foliar area and stomatal conductance; while net photosynthetic rate and transpiration were not affected. Interestingly, salinity increased chlorophyll and antioxidant capacity in most genotypes; however neither parameter correlated well to ST index. Salt-tolerant genotypes showed upregulation of the SOS1, SOS2, SOS3, HKT1, AKT1, NHX1, P5CS1, HSP90.7, HSP81.2, HSP71.1, HSPC025, OTS1, SGF29 and SAL1 genes. Gene expression analyses allowed us to classify genotypes based on their ability to regulate different components of the salt tolerance mechanism. Pyramiding different components of the salt tolerance mechanism may lead to superior salt-tolerant alfalfa genotypes.
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Claims 17
Claim · model-written summary
Salt tolerance index among genotypes ranged from 0.39 to 1.
- Taxon
- alfalfa
Medicago sativat0 - Outcome
- Salt tolerance (ST) indexe0
- Value
- 0.39 to 1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt tolerance (ST) index of the genotypes ranged from 0.39 to 1”
t0“alfalfa”
Claim · model-written summary
SISA14-1 (G03) and AZ-90ST (G10) were the top biomass performers and least affected in shoot number and height.
- Taxon
- alfalfaMedicago sativat0
- Material
- SISA14-1 (G03) and AZ-90ST (G10)e0
- Outcome
- shoot number and heighte0
- Direction
- least effecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most salt-tolerant genotypes SISA14-1 (G03) and AZ-90ST (G10), the top performers for biomass, exhibited the least effect on shoot number and height”
t0“alfalfa”
Claim · model-written summary
SISA14-1 accumulated low sodium and chloride under salinity.
- Taxon
- alfalfaMedicago sativat0
- Material
- SISA14-1 (G03)e0
- Outcome
- Na and Cle0
- Direction
- lowe0
- Qualifier
- under salinitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SISA14-1 (G03) accumulated low Na and Cl under salinity”
t0“alfalfa”
Claim · model-written summary
Most genotypes had reduced shoot Ca, Mg and P under salinity.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- salinitye0
- Outcome
- shoot Ca, Mg, Pe0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most genotypes exhibited a net reduction in shoot Ca, Mg, P, Fe, and Cu, while Mn and Zn increased under salinity”
t0“alfalfa”
Claim · model-written summary
Most genotypes had reduced shoot Fe and Cu under salinity.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- salinitye0
- Outcome
- Fe, and Cue0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most genotypes exhibited a net reduction in shoot Ca, Mg, P, Fe, and Cu, while Mn and Zn increased under salinity”
t0“alfalfa”
Claim · model-written summary
Shoot Mn and Zn increased under salinity.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- salinitye0
- Outcome
- Mn and Zne0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while Mn and Zn increased under salinity”
t0“alfalfa”
Claim · model-written summary
Salinity reduced foliar area and stomatal conductance.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- Salinitye0
- Outcome
- foliar area and stomatal conductancee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity reduced foliar area and stomatal conductance”
t0“alfalfa”
Claim · model-written summary
Salinity did not affect net photosynthetic rate or transpiration.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- salinityt0
- Outcome
- net photosynthetic rate and transpiratione0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“net photosynthetic rate and transpiration were not affected”
t0“Variable salinity responses of 12 alfalfa genotypes”
Claim · model-written summary
Salinity increased chlorophyll and antioxidant capacity in most genotypes.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- salinitye0
- Outcome
- chlorophyll and antioxidant capacitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salinity increased chlorophyll and antioxidant capacity in most genotypes”
t0“alfalfa”
Claim · model-written summary
Neither chlorophyll nor antioxidant capacity correlated well with salt tolerance index.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- salinityt0
- Outcome
- ST indexe0
- Qualifier
- neither parametere0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“neither parameter correlated well to ST index”
t0“Variable salinity responses of 12 alfalfa genotypes”
Claim · model-written summary
Salt-tolerant genotypes upregulated SOS1, SOS2 and SOS3.
- Taxon
- alfalfaMedicago sativat0
- Gene
- SOS1, SOS2, SOS3e0
- Outcome
- upregulatione0
- Direction
- upregulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt-tolerant genotypes showed upregulation of the SOS1, SOS2, SOS3, HKT1, AKT1, NHX1, P5CS1, HSP90.7, HSP81.2, HSP71.1, HSPC025, OTS1, SGF29 and SAL1 genes”
t0“alfalfa”
Claim · model-written summary
Salt-tolerant genotypes upregulated HKT1, AKT1 and NHX1.
- Taxon
- alfalfaMedicago sativat0
- Gene
- HKT1, AKT1, NHX1e0
- Outcome
- upregulatione0
- Direction
- upregulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt-tolerant genotypes showed upregulation of the SOS1, SOS2, SOS3, HKT1, AKT1, NHX1, P5CS1, HSP90.7, HSP81.2, HSP71.1, HSPC025, OTS1, SGF29 and SAL1 genes”
t0“alfalfa”
Claim · model-written summary
Salt-tolerant genotypes upregulated P5CS1, HSP90.7 and HSP81.2.
- Taxon
- alfalfaMedicago sativat0
- Gene
- P5CS1, HSP90.7, HSP81.2e0
- Outcome
- upregulatione0
- Direction
- upregulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt-tolerant genotypes showed upregulation of the SOS1, SOS2, SOS3, HKT1, AKT1, NHX1, P5CS1, HSP90.7, HSP81.2, HSP71.1, HSPC025, OTS1, SGF29 and SAL1 genes”
t0“alfalfa”
Claim · model-written summary
Salt-tolerant genotypes upregulated HSP71.1, HSPC025 and OTS1.
- Taxon
- alfalfaMedicago sativat0
- Gene
- HSP71.1, HSPC025, OTS1e0
- Outcome
- upregulatione0
- Direction
- upregulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt-tolerant genotypes showed upregulation of the SOS1, SOS2, SOS3, HKT1, AKT1, NHX1, P5CS1, HSP90.7, HSP81.2, HSP71.1, HSPC025, OTS1, SGF29 and SAL1 genes”
t0“alfalfa”
Claim · model-written summary
Salt-tolerant genotypes upregulated SGF29 and SAL1.
- Taxon
- alfalfaMedicago sativat0
- Gene
- SGF29 and SAL1e0
- Outcome
- upregulatione0
- Direction
- upregulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt-tolerant genotypes showed upregulation of the SOS1, SOS2, SOS3, HKT1, AKT1, NHX1, P5CS1, HSP90.7, HSP81.2, HSP71.1, HSPC025, OTS1, SGF29 and SAL1 genes”
t0“alfalfa”
Claim · model-written summary
Gene expression analysis classified genotypes by regulation of salt tolerance components.
- Taxon
- alfalfaMedicago sativat0
- Outcome
- classify genotypese0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gene expression analyses allowed us to classify genotypes based on their ability to regulate different components of the salt tolerance mechanism”
t0“alfalfa”
Claim · model-written summary
The authors suggest pyramiding salt tolerance components may yield superior tolerant genotypes.
- Taxon
- alfalfaMedicago sativae0
- Outcome
- Pyramiding different components of the salt tolerance mechanisme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pyramiding different components of the salt tolerance mechanism may lead to superior salt-tolerant alfalfa genotypes”
The same questions in other papers
salinity · physiology: photosynthesis · Medicago sativa (alfalfa)Results differ
15 papers in the same direction as this paper · 1 in the opposite direction
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