Abstract
summary Three isolates of vesicular‐arbuscular (VA) mycorrhizal fungi, belonging to the species Glomus mosseae (Nicol. and Gerd.) Gerd. and Trappe, G. fasciculatum (Taxter sensu Gerd.) Gerd, and Trappe, and G. caledonium (Nicol. and Gerd.) Trappe and Gerd, were inoculated in dual combinations with six strains of Rhizobium meliloti with the aim of testing these combinations for functional compatibility with their common host plant, the legume Medicago sativa L. Symbiotic efficiency (promotion of plant growth and N and P nutrition) was found to be dependent on the particular combination of Rhizobium strain and Glomus species indicating selective and specific compatibilities between strains and isolates of the two types of microsymbiont, but also between them and the common host plant. Observed effects on plant growth were in general, though not always, related to the extent of VA mycorrhizal colonization. Although the different mycorrhizal and/or rhizobial treatments produced different effects on plant growth, the rate of nodule formation on M. sativa roots remained constant. Most mycorrhizal treatments increased the concentration and/or content of N in plant shoots but effectiveness was in the order: G. fasciculatum > G. mosseae > G. caledonium. In some cases, this increase in N‐content may be a consequence of a P‐mediated stimulation of N 2 ‐fixation by VA mycorrhiza, as ascertained using 15 N. In other instances, however, the increase seems to reflect a VA mycorrhizal‐mediated enhancement of N‐uptake from soil. VA mycorrhizal inoculation decreased the concentration of Ca and Mg in plant shoots and a buffering effect of VA mycorrhiza in situations of nutrient excess in soil is proposed.
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Claims 9
Claim · model-written summary
Symbiotic efficiency of Medicago sativa depended on the combination of Rhizobium strain and Glomus species.
- Taxon
- Medicago sativa
Medicago sativae0 - Treatment
- combination of Rhizobium strain and Glomus speciese1
- Second interactor
- Rhizobium meliloti
Sinorhizobium melilotit0symbiont - Outcome
- Symbiotic efficiencye1
GlomusNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their common host plant, the legume Medicago sativa L.”
e1“Symbiotic efficiency (promotion of plant growth and N and P nutrition) was found to be dependent on the particular combination of Rhizobium strain and Glomus species”
t0“Rhizobium meliloti strains”
Claim · model-written summary
Effects of mycorrhizal inoculation on Medicago sativa growth were related to the extent of VA mycorrhizal colonization.
- Taxon
- Medicago sativaMedicago sativae0
- Treatment
- extent of VA mycorrhizal colonizatione2
- Interactor
- VA mycorrhizale2symbiont
- Outcome
- effects on plant growthe2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their common host plant, the legume Medicago sativa L.”
e2“Observed effects on plant growth were in general, though not always, related to the extent of VA mycorrhizal colonization”
Claim · model-written summary
The rate of nodule formation on Medicago sativa roots remained constant across treatments.
- Taxon
- Medicago sativaMedicago sativae0
- Organ / stage
- rootse3
- Outcome
- rate of nodule formatione3
- Direction
- remained constante3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their common host plant, the legume Medicago sativa L.”
e3“the rate of nodule formation on M. sativa roots remained constant”
Claim · model-written summary
Most mycorrhizal treatments increased the concentration and content of N in Medicago sativa shoots.
- Taxon
- Medicago sativaMedicago sativae0
- Organ / stage
- plant shootse4
- Treatment
- mycorrhizal treatmentse4
- Outcome
- concentration and/or content of Ne4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their common host plant, the legume Medicago sativa L.”
e4“Most mycorrhizal treatments increased the concentration and/or content of N in plant shoots”
Claim · model-written summary
Effectiveness of the Glomus isolates on Medicago sativa followed the order G. fasciculatum, G. mosseae, G. caledonium.
- Taxon
- Medicago sativaMedicago sativae0
- Interactor
- G. fasciculatumRhizophagus fasciculatuse5symbiont
- Outcome
- effectivenesse5
- Direction
- in the ordere5
- Qualifier
- G. mosseae > G. caledoniume5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their common host plant, the legume Medicago sativa L.”
e5“effectiveness was in the order: G. fasciculatum > G. mosseae > G. caledonium”
Claim · model-written summary
The increase in N content in Medicago sativa may be a consequence of VA mycorrhiza-stimulated N2 fixation, as ascertained using 15N.
- Taxon
- Medicago sativaMedicago sativae0
- Treatment
- VA mycorrhizae6
- Outcome
- increase in Ne6
- Qualifier
- as ascertained using 15 Ne7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their common host plant, the legume Medicago sativa L.”
e6“this increase in N‐content may be a consequence of a P‐mediated stimulation of N 2 ‐fixation by VA mycorrhiza”
e7“as ascertained using 15 N”
Claim · model-written summary
The increase in N may reflect VA mycorrhiza-mediated enhancement of N uptake from soil in Medicago sativa.
- Taxon
- Medicago sativaMedicago sativae0
- Treatment
- VA mycorrhizale1
- Outcome
- uptake from soile1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their common host plant, the legume Medicago sativa L.”
e1“a VA mycorrhizal‐mediated enhancement of N‐uptake from soil”
Claim · model-written summary
VA mycorrhizal inoculation decreased the concentration of Ca and Mg in Medicago sativa shoots.
- Taxon
- Medicago sativaMedicago sativae0
- Organ / stage
- plant shootse1
- Treatment
- VA mycorrhizal inoculatione1
- Outcome
- concentration of Ca and Mge1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their common host plant, the legume Medicago sativa L.”
e1“VA mycorrhizal inoculation decreased the concentration of Ca and Mg in plant shoots”
Claim · model-written summary
A buffering effect of VA mycorrhiza in situations of nutrient excess in soil is proposed for Medicago sativa.
- Taxon
- Medicago sativaMedicago sativae0
- Interactor
- VA mycorrhizae1symbiont
- Outcome
- buffering effecte1
- Qualifier
- in situations of nutrient excess in soile1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their common host plant, the legume Medicago sativa L.”
e1“a buffering effect of VA mycorrhiza in situations of nutrient excess in soil is proposed”
The same questions in other papers
mycorrhiza · molecular: metabolites · Medicago sativa (alfalfa)Positive and negative results
12 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
10 papers more in this group
See all 14 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.