Search claims · PlantClaims

Associationobservedoriginal resultmeasured

Claim · model-written summary

Root biomass in M. truncatula increases with the number of effective nodules but not with the number of ineffective nodules.

Taxon: Medicago truncatulaMedicago truncatulat0
Organ / stage: nodulese0
Outcome: root biomasse0
Direction: increasese0

Verbatim

e0
“root biomass increases with the number of effective, but not ineffective, nodules”
✓ located verbatim in the source · abstract, characters 750–831

t0
“Medicago truncatula”
✓ located verbatim in the source · title, characters 64–83

Title

The evolution of symbiont preference traits in the model legume Medicago truncatula

Rebecca T. Batstone; Emily M. Dutton; Donglin Wang; et al. New Phytologist 2016. doi:10.1111/nph.14308

Other claims from this paper (5)

Observationobservedoriginal resultmeasured

Claim · model-written summary

Broad sense heritability for number of root nodules was 46%.

Taxon: cowpeaVigna unguiculatat0
Outcome: number of root nodulese0
Value: 46%e0

Verbatim

e0
“46% for number of root nodules”
✓ located verbatim in the source · abstract, characters 943–973

t0
“cowpea”
✓ located verbatim in the source · title, characters 57–63

Title

Genetic variability and heritability of some selected of cowpea (Vigna unguiculata (L) Walp) lines

A H Inuwa; H A Ajeigbe; M I Muhammad; et al. Open Access Repository of ICRISAT (International Crops Research Institute for the Semi-Arid Tropics) 2012

Other claims from this paper (5)

Observation Cowpea lines varied considerably in vegetative and reproductive phase duration and yield characters.
Observation Broad sense heritability for 100 seed weight was 83%.
Observation Broad sense heritability for number of seeds per pod was 53%.
Observation Broad sense heritability for days to first flower was 48%.
Recommendation The authors concluded that cowpea variability is sufficient to justify selection for improvement.

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Biochar application significantly increased the number of root nodules by 25%.

Treatment: Biochar applicatione0
Outcome: number of root nodulese1
Direction: increasede1
Value: +25%e1

Not reportedTaxonComparator

Verbatim

e0
“Biochar application also affected”
✓ located verbatim in the source · abstract, characters 1027–1060

e1
“significantly increased the number of root nodules (+25%)”
✓ located verbatim in the source · abstract, characters 1090–1147

Title

Effects of biochar application on root traits: a meta‐analysis

Yangzhou Xiang; Qi Deng; Honglang Duan; et al. GCB Bioenergy 2017. doi:10.1111/gcbb.12449

Other claims from this paper (12)

Intervention effect Biochar application increased root biomass by 32%.
Intervention effect Biochar application increased root volume by 29%.
Intervention effect Biochar application increased root surface area by 39%.
Intervention effect Biochar application increased root length by 52%, much more than root diameter.
Intervention effect Biochar application increased the number of root tips by 17%.
Intervention effect Biochar application increased root diameter by 9.9%, much less than root length and tip number.
Intervention effect Biochar application did not change root N concentration.
Intervention effect Biochar application significantly increased root P concentration by 22%, particularly when combined with N fertilization.
Association Responses of root traits to biochar were generally greater in annual plants than in perennial plants.
Association Responses of root traits to biochar were affected by soil texture and pH values.
Association The biochar production process (pyrolysis temperature and time) appears to play a more important role in regulating root growth than biochar source.
Mechanism The pattern of root increases suggests biochar benefits root morphological development to alleviate plant nutrient and water deficiency rather than to maximize biomass accumulation.

Intervention effectauthor interpretationreview summarynegativebasis n/a

Claim · model-written summary

Excessive nitrogen fertilizer reduces the number of root nodules.

Taxon: plantt0
Treatment: excessive use of nitrogen fertilizerse0
Outcome: number of root nodulese0
Direction: reducese0

Not reportedComparator

Verbatim

e0
“the excessive use of nitrogen fertilizers reduces the number of root nodules”
✓ located verbatim in the source · abstract, characters 663–739

t0
“plant”
✓ located verbatim in the source · title, characters 39–44

Title

The importance of nitrogen fixation in plant production

Šarčević-Todosijević, Ljubica; Golijan Pantović, Jelena; Popović, Vera; et al. AgroSpace (University of Belgrade, Faculty of Agriculture) 2025

Other claims from this paper (5)

Intervention effect Microbiological preparations can improve nitrogen fixation.
Intervention effect Microbiological preparations can increase plant yield.
Intervention effect Excessive nitrogen fertilizer negatively affects nodule bacteria activity.
Association Plant genotype is an important factor in maximum nitrogen fixation potential.
Recommendation The authors recommend proper agrotechnical measures for profitable and sustainable plant production.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Trifolium repens plants had a satisfactory number of root nodules.

Taxon: T. repensTrifolium repense1
Outcome: had a satisfactory number of root nodulese1

Verbatim

e1
“that T. repens plants had a satisfactory number of root nodules”
✓ located verbatim in the source · abstract, characters 1522–1585

Title

Persistence of sown species and ingress of unsown species in agriculturally improved hill swards

D. WILMAN; S. A. BYRNE; D. J. J. HUKIN; et al. The Journal of Agricultural Science 1999. doi:10.1017/s0021859698006200

Other claims from this paper (15)

Observationobservedoriginal resultmeasured

Claim · model-written summary

Vicia faba had the same chromosome number in root nodules and root tips, with only diploid nodule cells.

Taxon: Vicia fabaVicia fabae0
Organ / stage: root nodules and root tipse0
Outcome: Same chromosome numbere0

Not reportedDirection

Verbatim

e0
“Same chromosome number was found in both root nodules and root tips of Vicia faba. It was the first finding in plant species that there were root nodules having only diploid cells”
✓ located verbatim in the source · abstract, characters 175–354

Title

Cytological Studies on Root Nodules of Some Species in Leguminosae I

Seizi TATUNO; Akira KODAMA Shokubutsugaku Zasshi 1965. doi:10.15281/jplantres1887.78.503

Other claims from this paper (6)

Observationauthor interpretationreview summarybasis n/a

Claim · model-written summary

The location and number of legume root nodules are tightly regulated.

Taxon: legumee0
Outcome: location and number of nodulese1
Qualifier: tightly regulatede1

Verbatim

e0
“Rhizobia form nodules on legume roots in which they carry out biological nitrogen fixation”
✓ located verbatim in the source · abstract, characters 0–90

e1
“The location and number of nodules is tightly regulated”
✓ located verbatim in the source · abstract, characters 92–147

Title

Signalling in symbiotic root nodule formation.

K van de Sande; T Bisseling PubMed 1997

Other claims from this paper (4)

Associationobservedoriginal resultno effectmeasured

Claim · model-written summary

Total number of primary root nodules did not differ between the two temperature regimes.

Taxon: Vicia fabaVicia fabat0
Treatment: temperature regimese4
Outcome: total number of primary root nodulese4
Direction: no differencee4

Verbatim

e4
“There was no difference in the total number of primary root nodules in the two temperature regimes”
✓ located verbatim in the source · abstract, characters 681–779

t0
“Vicia faba L.”
✓ located verbatim in the source · title, characters 43–56

Title

The Development of Primary Root Nodules on Vicia faba L. Grown at Two Temperatures

A. FYSON; J. I. SPRENT Annals of Botany 1982. doi:10.1093/oxfordjournals.aob.a086410

Other claims from this paper (8)

Intervention effect Primary root nodules developed much more slowly at 10 °C than at 18 °C.
Intervention effect Nodules were much larger at 10 °C than at 18 °C when corresponding anatomical changes occurred.
Intervention effect Ultimate nodule volume at 10 °C was nearly twice that at 18 °C.
Observation Primary root nodules ceased growth in both temperature regimes.
Observation Nodule distribution at 18 °C was biased towards the upper part of the root and the epicotyl.
Association Cold-grown nodules had lower specific nitrogenase activity.
Intervention effect Nitrogen fixation (acetylene reduction) rates on a whole plant basis were much lower at 10 °C than at 18 °C.
Association The sequence of anatomical changes was the same in both temperature regimes.

Associationobservedoriginal resultmeasured

Claim · model-written summary

Size, number and validity of root nodules were related to the ecological environment.

Taxon: legumet0
Outcome: size, number and validity of root nodulese0
Setting: ecological environmente0

Not reportedDirection

Verbatim

t0
“Legume”
✓ located verbatim in the source · title, characters 64–70

e0
“The size, number and validity of root nodules were related to ecological environment”
✓ located verbatim in the source · abstract, characters 589–673

Title

Investigation of the Nodulation and Nitrogen-Fixing Resource of Legume in Guizhou Province

Xianyuan Li Journal of Southwest China Normal University 2004

Other claims from this paper (6)

Observation Papilionoideae legumes had a nodulation rate of 95%.
Observation Mimosoideae legumes had a nodulation rate of 75%.
Observation Caesalpinioideae legumes had a nodulation rate of 5%.
Observation About 96% of root nodules grew on the lateral root of the host.
Observation Root nodules were spherical or columnar in shape and white or brown in color.
Observation Reinoculation of 55 rhizobial strains isolated from nodules gave a 33% nodulation rate.

Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

All legumes produced the greatest number of root nodules at pH 7 or 8.

Taxon: legumese2
Treatment: pH 7 or 8e2
Outcome: root nodulese2
Direction: greateste2

Verbatim

e2
“all the legumes produced the greatest number of root nodules at pH 7 or 8”
✓ located verbatim in the source · abstract, characters 421–494

Title

Effects of lime on the growth and nodulation of four grain legumes.

RS Jessop; J Mahoney Australian Journal of Soil Research 1982. doi:10.1071/sr9820265

Other claims from this paper (4)

Association Chickpeas were the least affected by soil pH and calcium in root and shoot growth.
Association Top dry weight in lupins was maximized at pH 6.
Association Top dry weight in lupins declined rapidly above pH 7.
Association Field peas, chickpeas and faba beans had maximum above-ground dry weights between pH 7 and 8.

“number of root nodules”

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