Abstract
The aim of this study was to assess the effect of symbiotic bacteria inoculation on the response of Medicago truncatula genotypes to iron deficiency. The present work was conducted on three Medicago truncatula genotypes: A17, TN8.20, and TN1.11. Three treatments were performed: control (C), direct Fe deficiency (DD), and induced Fe deficiency by bicarbonate (ID). Plants were nitrogen-fertilized (T) or inoculated with two bacterial strains: Sinorhizobium meliloti TII7 and Sinorhizobium medicae SII4. Biometric, physiological, and biochemical parameters were analyzed. Iron deficiency had a significant lowering effect on plant biomass and chlorophyll content in all Medicago truncatula genotypes. TN1.11 showed the highest lipid peroxidation and leakage of electrolyte under iron deficiency conditions, which suggest that TN1.11 was more affected than A17 and TN8.20 by Fe starvation. Iron deficiency affected symbiotic performance indices of all Medicago truncatula genotypes inoculated with both Sinorhizobium strains, mainly nodules number and biomass as well as nitrogen-fixing capacity. Nevertheless, inoculation with Sinorhizobium strains mitigates the negative effect of Fe deficiency on plant growth and oxidative stress compared to nitrogen-fertilized plants. The highest auxin producing strain, TII7, preserves relatively high growth and root biomass and length when inoculated to TN8.20 and A17. On the other hand, both TII7 and SII4 strains improve the performance of sensitive genotype TN1.11 through reduction of the negative effect of iron deficiency on chlorophyll and plant Fe content. The bacterial inoculation improved Fe-deficient plant response to oxidative stress via the induction of the activities of antioxidant enzymes.
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Claims 12
Claim · model-written summary
Iron deficiency significantly reduced biomass of all Medicago genotypes.
- Taxon
- Medicago truncatula
Medicago truncatulae0 - Treatment
- Iron deficiencye0
- Outcome
- plant biomasse0
- Direction
- loweringe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Iron deficiency had a significant lowering effect on plant biomass and chlorophyll content in all Medicago truncatula genotypes.”
Claim · model-written summary
Iron deficiency significantly reduced chlorophyll content in all Medicago genotypes.
- Taxon
- Medicago truncatulaMedicago truncatulae0
- Treatment
- Iron deficiencye0
- Outcome
- chlorophyll contente0
- Direction
- loweringe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Iron deficiency had a significant lowering effect on plant biomass and chlorophyll content in all Medicago truncatula genotypes.”
Claim · model-written summary
TN1.11 had the highest lipid peroxidation under iron deficiency.
- Taxon
- Medicago truncatulaMedicago truncatulat0
- Material
- TN1.11e0
- Treatment
- iron deficiencye0
- Outcome
- lipid peroxidatione0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TN1.11 showed the highest lipid peroxidation and leakage of electrolyte under iron deficiency conditions”
t0“Medicago truncatula”
Claim · model-written summary
TN1.11 had the highest electrolyte leakage under iron deficiency.
- Taxon
- Medicago truncatulaMedicago truncatulat0
- Material
- TN1.11e0
- Treatment
- iron deficiencye0
- Outcome
- leakage of electrolytee0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TN1.11 showed the highest lipid peroxidation and leakage of electrolyte under iron deficiency conditions”
t0“Medicago truncatula”
Claim · model-written summary
Iron deficiency affected nodule number and biomass in inoculated Medicago genotypes.
- Taxon
- Medicago truncatulaMedicago truncatulae0
- Treatment
- Iron deficiencye0
- Interactor
- Sinorhizobium
.JPG?width=60)
Sinorhizobiume0symbiont - Outcome
- nodules number and biomasse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.JPG?width=500)
Verbatim
e0“Iron deficiency affected symbiotic performance indices of all Medicago truncatula genotypes inoculated with both Sinorhizobium strains, mainly nodules number and biomass as well as nitrogen-fixing capacity.”
Claim · model-written summary
Iron deficiency affected nitrogen-fixing capacity in inoculated Medicago genotypes.
- Taxon
- Medicago truncatulaMedicago truncatulae0
- Treatment
- Iron deficiencye0
- Interactor
- SinorhizobiumSinorhizobiume0symbiont
- Outcome
- nitrogen-fixing capacitye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Iron deficiency affected symbiotic performance indices of all Medicago truncatula genotypes inoculated with both Sinorhizobium strains, mainly nodules number and biomass as well as nitrogen-fixing capacity.”
Claim · model-written summary
Sinorhizobium inoculation mitigated the effect of iron deficiency on Medicago growth compared with nitrogen fertilization.
- Taxon
- Medicago truncatulaMedicago truncatulat0
- Treatment
- inoculation with Sinorhizobium strainse0
- Interactor
- Sinorhizobium strainse0symbiont
- Outcome
- plant growthe0
- Direction
- mitigatese0
- Comparator
- nitrogen-fertilized plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation with Sinorhizobium strains mitigates the negative effect of Fe deficiency on plant growth and oxidative stress compared to nitrogen-fertilized plants.”
t0“Medicago truncatula”
Claim · model-written summary
Sinorhizobium inoculation mitigated oxidative stress under iron deficiency compared with nitrogen fertilization.
- Taxon
- Medicago truncatulaMedicago truncatulat0
- Treatment
- inoculation with Sinorhizobium strainse0
- Interactor
- Sinorhizobium strainse0symbiont
- Outcome
- oxidative stresse0
- Direction
- mitigatese0
- Comparator
- nitrogen-fertilized plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation with Sinorhizobium strains mitigates the negative effect of Fe deficiency on plant growth and oxidative stress compared to nitrogen-fertilized plants.”
t0“Medicago truncatula”
Claim · model-written summary
TII7 preserved relatively high growth and root biomass and length in TN8.20 and A17.
- Taxon
- Medicago truncatulaMedicago truncatulat0
- Material
- TN8.20 and A17e0
- Treatment
- TII7e0
- Interactor
- TII7e0symbiont
- Outcome
- growth and root biomass and lengthe0
- Direction
- relatively highe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest auxin producing strain, TII7, preserves relatively high growth and root biomass and length when inoculated to TN8.20 and A17.”
t0“Medicago truncatula”
Claim · model-written summary
TII7 reduced the effect of iron deficiency on chlorophyll and Fe content in TN1.11.
- Taxon
- Medicago truncatulaMedicago truncatulat0
- Material
- TN1.11e0
- Treatment
- TII7e0
- Interactor
- TII7e0symbiont
- Outcome
- chlorophyll and plant Fe contente0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both TII7 and SII4 strains improve the performance of sensitive genotype TN1.11 through reduction of the negative effect of iron deficiency on chlorophyll and plant Fe content.”
t0“Medicago truncatula”
Claim · model-written summary
SII4 reduced the effect of iron deficiency on chlorophyll and Fe content in TN1.11.
- Taxon
- Medicago truncatulaMedicago truncatulat0
- Material
- TN1.11e0
- Treatment
- SII4e0
- Interactor
- SII4e0symbiont
- Outcome
- chlorophyll and plant Fe contente0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both TII7 and SII4 strains improve the performance of sensitive genotype TN1.11 through reduction of the negative effect of iron deficiency on chlorophyll and plant Fe content.”
t0“Medicago truncatula”
Claim · model-written summary
Bacterial inoculation induced antioxidant enzyme activities in iron-deficient Medicago plants.
- Taxon
- Medicago truncatulaMedicago truncatulat0
- Treatment
- bacterial inoculatione0
- Outcome
- activities of antioxidant enzymese0
- Direction
- inductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The bacterial inoculation improved Fe-deficient plant response to oxidative stress via the induction of the activities of antioxidant enzymes.”
t0“Medicago truncatula”
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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.