Abstract
On a moderately acid soil (pH 4.6 in 115 suspension of soil in 0.01M calcium chloride), nodulation of Medicago truncatula cv. Cyprus responded markedly to increasing applications of calcium carbonate, which increased soil pH. Since the effect of increasing soil pH on the percentage nodulation could be replaced to a large extent by increasing the inoculation level, it appeared that nodulation was restricted by the inability of Rhizobium meliloti to survive or multiply in the acid soil. The growth of R, meliloti appeared more sensitive to soil acidity than growth of the host plant of annual Medicago species. It is suggested that more acid-tolerant strains of R. meliloti would permit annual Medicago species to be grown successfully on moderately acid soils, thus extending the range of soils suitable for the growth of these species.
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Claims 6
Claim · model-written summary
Increasing calcium carbonate markedly increased nodulation of Medicago truncatula cv. Cyprus on moderately acid soil.
- Taxon
- Medicago truncatula
Medicago truncatulae0 - Material
- cv. Cypruse0
- Treatment
- increasing applications of calcium carbonatee0
- Outcome
- nodulatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nodulation of Medicago truncatula cv. Cyprus responded markedly to increasing applications of calcium carbonate”
Claim · model-written summary
Calcium carbonate increased soil pH.
- Taxon
- Medicago truncatulaMedicago truncatulat0
- Treatment
- calcium carbonatee0
- Outcome
- soil pHe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“calcium carbonate, which increased soil pH”
t0“Nodulation and growth of Medicago truncatula on acid soils.”
Claim · model-written summary
Increasing inoculation level largely replaced the effect of higher soil pH on percentage nodulation.
- Taxon
- Medicago truncatulaMedicago truncatulat0
- Treatment
- increasing the inoculation levele0
- Outcome
- percentage nodulatione0
- Comparator
- increasing soil pHe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of increasing soil pH on the percentage nodulation could be replaced to a large extent by increasing the inoculation level”
t0“Nodulation and growth of Medicago truncatula on acid soils.”
Claim · model-written summary
Rhizobium meliloti survival or multiplication in acid soil was inferred to restrict nodulation.
- Taxon
- Medicago truncatulaMedicago truncatulat0
- Interactor
- Rhizobium meliloti
Sinorhizobium melilotie0symbiont - Outcome
- nodulatione0
- Qualifier
- inability of Rhizobium meliloti to survive or multiply in the acid soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nodulation was restricted by the inability of Rhizobium meliloti to survive or multiply in the acid soil”
t0“Nodulation and growth of Medicago truncatula on acid soils.”
Claim · model-written summary
R. meliloti growth appeared more sensitive to soil acidity than annual Medicago growth.
Verbatim
e0“growth of R, meliloti appeared more sensitive to soil acidity than growth of the host plant of annual Medicago species”
Claim · model-written summary
The authors suggested more acid-tolerant R. meliloti strains to enable annual Medicago cultivation on moderately acid soils.
- Taxon
- annual Medicago speciese0
- Interactor
- R. melilotiSinorhizobium melilotie0symbiont
- Outcome
- grown successfully on moderately acid soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more acid-tolerant strains of R. meliloti would permit annual Medicago species to be grown successfully on moderately acid soils”
The same questions in other papers
calcium carbonate · symbiosis · Medicago truncatula (barrel medic)Results agree
1 paper in the same direction as this paper
- positive
inoculation · symbiosis · Medicago truncatula (barrel medic)Positive and negative results
4 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
3 papers more in this group
See all 7 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.