Abstract
In this work, we have compared the physiological responses of alfalfa plants inoculated with either Sinorhizobium meliloti strain S412 (Cu-tolerant) or S112 (Cu-sensitive) in the presence or absence of 0.5 mM of CuSO4. The addition of copper (Cu) introduced a decrease of nodule number and their dry weight (DW) in both symbioses. The interaction established with the Cu-sensitive strain is more affected by Cu than that with the tolerant one. In fact, plants inoculated with the sensitive strain revealed a decrease of shoot and root DW, larger than that found in plants inoculated with the tolerant strain. However, under copper supply, Medicago sativa with the Cu-tolerant strain did not show any significant changes in both shoot and root biomass production. Under Cu excess, high levels of Cu were detected in different parts of the plant in the two symbioses and a high translocation of Cu to aerial parts was shown with the strain S412. Plants with S412 were able to accumulate large quantities of calcium (Ca) in their roots and nodules. While Ca content decreased drastically in shoot at 0.5 mM of Cu treatment. Moreover, nodulation with S412 allowed plants to maintain high levels of magnesium (Mg) in all tissues and high iron (Fe) levels in nodules. Results suggest that this symbiotic pair could be used in phytostabilization of Cu-contaminated soils.
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Claims 11
Claim · model-written summary
Copper addition decreased nodule number and nodule dry weight of alfalfa in both symbioses compared with no added copper.
- Taxon
- alfalfa
Medicago sativae2 - Treatment
- addition of copper (Cu)e0
- Outcome
- nodule number and their dry weighte0
- Direction
- decreasee0
- Comparator
- absence of 0.5 mM of CuSO4e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of copper (Cu) introduced a decrease of nodule number and their dry weight (DW) in both symbioses”
e1“in the presence or absence of 0.5 mM of CuSO4”
e2“alfalfa plants”
Claim · model-written summary
The symbiosis with the Cu-sensitive strain was more affected by copper than the symbiosis with the Cu-tolerant strain.
- Taxon
- alfalfaMedicago sativae1
- Material
- Cu-sensitive straine0
- Treatment
- Cue0
- Outcome
- interactione0
- Direction
- more affectede0
- Comparator
- the tolerant onee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The interaction established with the Cu-sensitive strain is more affected by Cu than that with the tolerant one”
e1“alfalfa plants”
Claim · model-written summary
Alfalfa inoculated with the Cu-sensitive strain showed a larger decrease in shoot and root dry weight than alfalfa inoculated with the Cu-tolerant strain.
- Taxon
- alfalfaMedicago sativae1
- Treatment
- inoculated with the sensitive straine0
- Outcome
- shoot and root DWe0
- Direction
- decreasee0
- Comparator
- plants inoculated with the tolerant straine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants inoculated with the sensitive strain revealed a decrease of shoot and root DW, larger than that found in plants inoculated with the tolerant strain”
e1“alfalfa plants”
Claim · model-written summary
Under copper supply, alfalfa with the Cu-tolerant strain showed no significant change in shoot and root biomass production.
- Taxon
- Medicago sativaMedicago sativae0
- Material
- Cu-tolerant straine0
- Treatment
- under copper supplye0
- Outcome
- shoot and root biomass productione0
- Direction
- did not show any significant changese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under copper supply, Medicago sativa with the Cu-tolerant strain did not show any significant changes in both shoot and root biomass production”
Claim · model-written summary
Under copper excess, high levels of copper were detected in different parts of alfalfa plants in both symbioses.
- Taxon
- alfalfaMedicago sativae1
- Treatment
- Under Cu excesse0
- Outcome
- levels of Cue0
- Direction
- highe0
- Qualifier
- in different parts of the plante0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under Cu excess, high levels of Cu were detected in different parts of the plant in the two symbioses”
e1“alfalfa plants”
Claim · model-written summary
Under copper excess, the strain S412 produced a high translocation of copper to the aerial parts of alfalfa.
- Taxon
- alfalfaMedicago sativae1
- Material
- strain S412e0
- Treatment
- Under Cu excesse2
- Outcome
- translocation of Cu to aerial partse0
- Direction
- highe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a high translocation of Cu to aerial parts was shown with the strain S412”
e1“alfalfa plants”
e2“Under Cu excess, high levels of Cu were detected in different parts of the plant in the two symbioses”
Claim · model-written summary
Alfalfa plants with strain S412 accumulated large quantities of calcium in their roots and nodules.
- Taxon
- alfalfaMedicago sativae1
- Material
- S412e0
- Outcome
- accumulate large quantities of calciume0
- Qualifier
- in their roots and nodulese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants with S412 were able to accumulate large quantities of calcium (Ca) in their roots and nodules”
e1“alfalfa plants”
Claim · model-written summary
Nodulation with strain S412 allowed alfalfa to maintain high levels of magnesium in all tissues.
- Taxon
- alfalfaMedicago sativae1
- Treatment
- nodulation with S412e0
- Outcome
- levels of magnesium (Mg)e0
- Direction
- highe0
- Qualifier
- in all tissuese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moreover, nodulation with S412 allowed plants to maintain high levels of magnesium (Mg) in all tissues and high iron (Fe) levels in nodules”
e1“alfalfa plants”
Claim · model-written summary
Nodulation with strain S412 gave high iron levels in alfalfa nodules.
- Taxon
- alfalfaMedicago sativae1
- Treatment
- nodulation with S412e0
- Outcome
- iron (Fe) levelse0
- Direction
- highe0
- Qualifier
- in nodulese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moreover, nodulation with S412 allowed plants to maintain high levels of magnesium (Mg) in all tissues and high iron (Fe) levels in nodules”
e1“alfalfa plants”
Claim · model-written summary
Under 0.5 mM copper treatment, calcium content decreased drastically in alfalfa shoots.
- Taxon
- alfalfaMedicago sativae1
- Treatment
- 0.5 mM of Cu treatmente0
- Outcome
- Ca contente0
- Direction
- decreased drasticallye0
- Qualifier
- in shoote0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“While Ca content decreased drastically in shoot at 0.5 mM of Cu treatment”
e1“alfalfa plants”
Claim · model-written summary
The authors suggest that this symbiotic pair could be used for phytostabilization of Cu-contaminated soils.
- Taxon
- alfalfaMedicago sativae1
- Outcome
- phytostabilization of Cu-contaminated soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results suggest that this symbiotic pair could be used in phytostabilization of Cu-contaminated soils”
e1“alfalfa plants”
The same questions in other papers
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See all 8 papers →copper atom · symbiosis · Medicago sativa (alfalfa)Results agree
1 paper in the same direction as this paper
- negative
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.