Abstract
Two hundred forty-three isolates of alfalfa root-nodule bacteria (Sinorhizobium meliloti) were obtained from nodules and soils sampled in the northern Aral region, experiencing secondary salinization. Isolates obtained from nodules (N isolates) were significantly more salt-tolerant than those from soils (T isolates) when grown in a liquid medium with 3.5% NaCl. It was found that wild species of alfalfa, melilot, and trigonella preferably formed symbioses with salt-tolerant root-nodule bacteria in both salinized and nonsalinized soils. Only two alfalfa species, Medicago falcata and M. trautvetteri, formed efficient symbioses in soils contrasting in salinity. The formation of efficient symbiosis with alfalfa in the presence of 0.6% NaCl was studied in 36 isolates (N and T) differing in salt tolerance and symbiotic efficiency. Fifteen isolates formed efficient symbioses in the presence of salt. The increase in the dry weight of the plants was 25–68% higher than in the control group. The efficiency of symbiotic interaction under salinization conditions depended on the symbiotic efficiency of the isolates under standard conditions but did not correlate with the source of root-nodule bacteria (soil or nodule) or their salt tolerance. The results indicate that the strains of root-nodule bacteria forming efficient symbioses under salinization conditions can be found.
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Claims 10
Claim · model-written summary
Nodule-derived isolates were more salt tolerant than soil-derived isolates.
- Taxon
- alfalfa
Medicago sativat0 - Treatment
- 3.5% NaCle0
- Interactor
- Sinorhizobium meliloti
Sinorhizobium melilotit0symbiont - Outcome
- salt-tolerante0
- Direction
- moree0
- Comparator
- those from soils (T isolates)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Isolates obtained from nodules (N isolates) were significantly more salt-tolerant than those from soils (T isolates) when grown in a liquid medium with 3.5% NaCl”
t0“Symbiosis between the root-nodule bacterium Sinorhizobium meliloti and alfalfa (Medicago sativa) under salinization conditions”
Claim · model-written summary
Wild alfalfa species preferentially formed symbioses with salt-tolerant bacteria in salinized and nonsalinized soils.
- Taxon
- alfalfaMedicago sativae0
- Interactor
- salt-tolerant root-nodule bacteriae0symbiont
- Outcome
- preferably formed symbiosese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wild species of alfalfa, melilot, and trigonella preferably formed symbioses with salt-tolerant root-nodule bacteria in both salinized and nonsalinized soils”
Claim · model-written summary
Melilot preferentially formed symbioses with salt-tolerant bacteria.
Verbatim
e0“wild species of alfalfa, melilot, and trigonella preferably formed symbioses with salt-tolerant root-nodule bacteria in both salinized and nonsalinized soils”
Claim · model-written summary
Trigonella preferentially formed symbioses with salt-tolerant bacteria.
- Taxon
- trigonella
Trigonellae0 - Interactor
- salt-tolerant root-nodule bacteriae0symbiont
- Outcome
- preferably formed symbiosese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wild species of alfalfa, melilot, and trigonella preferably formed symbioses with salt-tolerant root-nodule bacteria in both salinized and nonsalinized soils”
Claim · model-written summary
Medicago falcata formed efficient symbioses in soils contrasting in salinity.
- Taxon
- Medicago falcata
Medicago sativa subsp. falcatae0 - Interactor
- Sinorhizobium melilotiSinorhizobium melilotit0symbiont
- Outcome
- formed efficient symbiosese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only two alfalfa species, Medicago falcata and M. trautvetteri, formed efficient symbioses in soils contrasting in salinity”
t0“Symbiosis between the root-nodule bacterium Sinorhizobium meliloti and alfalfa (Medicago sativa) under salinization conditions”
Claim · model-written summary
M. trautvetteri formed efficient symbioses in soils contrasting in salinity.
- Taxon
- M. trautvetterie0
- Interactor
- Sinorhizobium melilotiSinorhizobium melilotit0symbiont
- Outcome
- formed efficient symbiosese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only two alfalfa species, Medicago falcata and M. trautvetteri, formed efficient symbioses in soils contrasting in salinity”
t0“Symbiosis between the root-nodule bacterium Sinorhizobium meliloti and alfalfa (Medicago sativa) under salinization conditions”
Claim · model-written summary
Fifteen bacterial isolates formed efficient symbioses under salt.
- Taxon
- alfalfaMedicago sativat0
- Interactor
- Sinorhizobium melilotiSinorhizobium melilotit0symbiont
- Outcome
- formed efficient symbiosese0
- Value
- Fifteen isolatese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fifteen isolates formed efficient symbioses in the presence of salt”
t0“Symbiosis between the root-nodule bacterium Sinorhizobium meliloti and alfalfa (Medicago sativa) under salinization conditions”
Claim · model-written summary
Plant dry weight increased 25–68% relative to controls.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- Sinorhizobium melilotit0
- Interactor
- Sinorhizobium melilotiSinorhizobium melilotit0symbiont
- Outcome
- dry weighte0
- Direction
- highere0
- Value
- 25–68%e0
- Comparator
- control groupe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in the dry weight of the plants was 25–68% higher than in the control group”
t0“Symbiosis between the root-nodule bacterium Sinorhizobium meliloti and alfalfa (Medicago sativa) under salinization conditions”
Claim · model-written summary
Symbiotic efficiency under salinity depended on efficiency under standard conditions.
- Taxon
- alfalfaMedicago sativat0
- Interactor
- Sinorhizobium melilotiSinorhizobium melilotit0symbiont
- Outcome
- efficiency of symbiotic interaction under salinization conditionse0
- Comparator
- symbiotic efficiency of the isolates under standard conditionse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The efficiency of symbiotic interaction under salinization conditions depended on the symbiotic efficiency of the isolates under standard conditions”
t0“Symbiosis between the root-nodule bacterium Sinorhizobium meliloti and alfalfa (Medicago sativa) under salinization conditions”
Claim · model-written summary
Symbiotic efficiency under salinity did not correlate with isolate source or salt tolerance.
- Taxon
- alfalfaMedicago sativat0
- Interactor
- root-nodule bacteriae0symbiont
- Outcome
- Symbiosist0
- Direction
- did not correlatee0
- Comparator
- source of root-nodule bacteria (soil or nodule) or their salt tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“did not correlate with the source of root-nodule bacteria (soil or nodule) or their salt tolerance”
t0“Symbiosis between the root-nodule bacterium Sinorhizobium meliloti and alfalfa (Medicago sativa) under salinization conditions”
The same questions in other papers
Sinorhizobium meliloti · growth · Medicago sativa (alfalfa)Positive and negative results
8 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
6 papers more in this group
See all 10 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.