Paper · 2014 · Acta Biologica Szegediensis

investigation of arbuscular mycorrhizal status and functionality by electrical impedance and capacitance measurement

Tünde Takács; Anna Füzy; Kálmán Rajkai; et al.

7
claims
9
verbatim quotes
3
citations
2
research areas
✓
Open access

Abstract

Applicability of electrical impedance (EI) and electrical capacitance (EC) measure- ment for the investigation of root colonization of mixed arbuscular mycorrhizal fungi (AMF) and functional diversity of separated AMF strains were studied in two pot experiments. In the first experiment, mycorrhizal and non-mycorrhizal maize cultivars were compared for testing the sensitivity of EI and EC measurement in relation to mycorrhizal status of host plants. In the second one, root colonization, biomass production, EI and EC of Rhizophagus intraradices or Funneliformis mosseae, inoculated and non-inoculated cucumber and bean hosts were monitored. The mycorrhizal plants showed lower EI and higher EC than control plants for each species. Since fungal colonization did not produce an increase in root surface area of maize, the higher root-soil interface showed by EI and EC values was undeniably due to the increased absorption surface area caused by the growth of AMF hyphae. As for cucumber and bean, the two selected AMF strains differed significantly in infectivity and effectivity, and the measured values also vary with host plants. Measuring EI and EC proved to be well applicable for in situ investigation of functional aspects of mycorrhizae.

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Claims 7

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Mycorrhizal plants had lower electrical impedance than controls.

Treatment
mycorrhizal plantse0
Outcome
EIe0
Direction
lowere0
Comparator
control plantse0

Not reportedTaxon

Verbatim

e0

“The mycorrhizal plants showed lower EI and higher EC than control plants for each species.”

✓ located verbatim in the source · abstract, characters 645–735 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Mycorrhizal plants had higher electrical capacitance than controls.

Treatment
mycorrhizal plantse0
Outcome
ECe0
Direction
highere0
Comparator
control plantse0

Not reportedTaxon

Verbatim

e0

“The mycorrhizal plants showed lower EI and higher EC than control plants for each species.”

✓ located verbatim in the source · abstract, characters 645–735 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Fungal colonization did not increase maize root surface area.

Taxon
maizeZea mayse0
Treatment
fungal colonizatione0
Outcome
root surface areae0
Direction
did not produce an increasee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“fungal colonization did not produce an increase in root surface area of maize”

✓ located verbatim in the source · abstract, characters 742–819 · show in text ↑
Observationobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

The AMF strains differed significantly in infectivity on cucumber and bean.

Taxon
cucumber and beane0
Interactor
AMF strainse0symbiont
Outcome
infectivitye0

Verbatim

e0

“As for cucumber and bean, the two selected AMF strains differed significantly in infectivity and effectivity”

✓ located verbatim in the source · abstract, characters 975–1083 · show in text ↑
Observationobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

The AMF strains differed significantly in effectivity on cucumber and bean.

Taxon
cucumber and beane0
Interactor
AMF strainse0symbiont
Outcome
effectivitye0

Verbatim

e0

“As for cucumber and bean, the two selected AMF strains differed significantly in infectivity and effectivity”

✓ located verbatim in the source · abstract, characters 975–1083 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Measured values varied by host plant.

Taxon
cucumber and beane1
Outcome
measured valuese0
Qualifier
host plantse0

Verbatim

e0

“the measured values also vary with host plants”

✓ located verbatim in the source · abstract, characters 1089–1135 · show in text ↑
e1

“As for cucumber and bean, the two selected AMF strains differed significantly in infectivity and effectivity, and the measured values also vary with host plants.”

✓ located verbatim in the source · abstract, characters 975–1136 · show in text ↑
Method / resourceobservedoriginal resultpositivemeasured

Claim · model-written summary

EI and EC were applicable for in situ study of mycorrhizal function.

Taxon
cucumber and beane1
Outcome
well applicable for in situ investigatione0

Not reportedComparator

Verbatim

e0

“Measuring EI and EC proved to be well applicable for in situ investigation of functional aspects of mycorrhizae.”

✓ located verbatim in the source · abstract, characters 1137–1249 · show in text ↑
e1

“In the second one, root colonization, biomass production, EI and EC of Rhizophagus intraradices or Funneliformis mosseae, inoculated and non-inoculated cucumber and bean hosts were monitored.”

✓ located verbatim in the source · abstract, characters 453–644 · show in text ↑

infection · growth · Zea mays (maize)Positive and negative results

44 papers: 17 positive, 27 negative or no effect

26 papers in the same direction as this paper · 17 in the opposite direction

  1. positive
  2. positive
  3. positive

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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.