Paper · 1972 · PLANT PHYSIOLOGY

Nutrient Status and Mycorrhizal Enhancement of Water Transport in Soybean

G. R. Safir; J. S. Boyer; J. W. Gerdemann

9
claims
16
verbatim quotes
215
citations
2
research areas
✓
Open access

Abstract

Mycorrhizal soybean (Glycine max L. Merr. var. Harosoy-63) plants have lower resistances to water transport than nonmy-corrhizal plants after 4.5 weeks of growth. Although resistances of whole plants differ by 40%, there were no differences in the resistances of stems plus leaves, indicating that the major effect of the mycorrhizae was to reduce the resistance of the roots. Since the fungitoxicant, p-chloronitrobenzene, had no effect on resistances to water transport, reduced resistances were probably not caused by a direct modification of the transport pathway by the fungus. Differences in resistance between mycorrhizal and nonmycorrhizal soybean were essentialy eliminated by the application of nutrients to the soil. Thus, lowered resistances of mycorrhizal roots growing in soil with low levels of nutrients probably resulted from the enhanced nutrient status of the plant brought about by the fungus. Mycorrhizal infection increased growth at both low and high nutrient levels.

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Claims 9

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Mycorrhizal soybean had lower resistance to water transport than nonmycorrhizal plants after 4.5 weeks of growth.

Taxon
Glycine maxGlycine maxe0
Treatment
Mycorrhizale0
Outcome
resistances to water transporte0
Direction
lowere0
Qualifier
after 4.5 weeks of growthe0
Comparator
nonmy-corrhizal plantse0

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“Mycorrhizal soybean (Glycine max L. Merr. var. Harosoy-63) plants have lower resistances to water transport than nonmy-corrhizal plants after 4.5 weeks of growth”

✓ located verbatim in the source · abstract, characters 0–161 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Whole-plant resistance to water transport differed by 40% between mycorrhizal and nonmycorrhizal soybean.

Taxon
Glycine maxGlycine maxe0
Treatment
Mycorrhizale0
Interactor
mycorrhizaee1symbiont
Outcome
resistances of whole plantse1
Direction
differe1
Value
40%e1
Comparator
nonmy-corrhizal plantse0

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“Mycorrhizal soybean (Glycine max L. Merr. var. Harosoy-63) plants have lower resistances to water transport than nonmy-corrhizal plants after 4.5 weeks of growth”

✓ located verbatim in the source · abstract, characters 0–161 · show in text ↑
e1

“Although resistances of whole plants differ by 40%, there were no differences in the resistances of stems plus leaves, indicating that the major effect of the mycorrhizae was to reduce the resistance of the roots”

✓ located verbatim in the source · abstract, characters 163–375 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Resistance of stems plus leaves did not differ between mycorrhizal and nonmycorrhizal soybean.

Taxon
Glycine maxGlycine maxe0
Treatment
Mycorrhizale0
Interactor
mycorrhizaee1symbiont
Outcome
resistances of stems plus leavese1
Direction
no differencese1
Comparator
nonmy-corrhizal plantse0

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“Mycorrhizal soybean (Glycine max L. Merr. var. Harosoy-63) plants have lower resistances to water transport than nonmy-corrhizal plants after 4.5 weeks of growth”

✓ located verbatim in the source · abstract, characters 0–161 · show in text ↑
e1

“Although resistances of whole plants differ by 40%, there were no differences in the resistances of stems plus leaves, indicating that the major effect of the mycorrhizae was to reduce the resistance of the roots”

✓ located verbatim in the source · abstract, characters 163–375 · show in text ↑
Intervention effectauthor interpretationoriginal resultpositivemeasured

Claim · model-written summary

The major effect of mycorrhizae was to reduce the resistance of the roots.

Taxon
Glycine maxGlycine maxe0
Treatment
mycorrhizaee1
Interactor
mycorrhizaee1symbiont
Outcome
resistance of the rootse1
Direction
reducee1
Comparator
nonmy-corrhizal plantse0

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“Mycorrhizal soybean (Glycine max L. Merr. var. Harosoy-63) plants have lower resistances to water transport than nonmy-corrhizal plants after 4.5 weeks of growth”

✓ located verbatim in the source · abstract, characters 0–161 · show in text ↑
e1

“Although resistances of whole plants differ by 40%, there were no differences in the resistances of stems plus leaves, indicating that the major effect of the mycorrhizae was to reduce the resistance of the roots”

✓ located verbatim in the source · abstract, characters 163–375 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

The fungitoxicant p-chloronitrobenzene had no effect on resistance to water transport in mycorrhizal soybean.

Taxon
Glycine maxGlycine maxe0
Treatment
p-chloronitrobenzenee2
Interactor
funguse2symbiont
Outcome
resistances to water transporte2
Direction
no effecte2

Not reportedComparator

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“Mycorrhizal soybean (Glycine max L. Merr. var. Harosoy-63) plants have lower resistances to water transport than nonmy-corrhizal plants after 4.5 weeks of growth”

✓ located verbatim in the source · abstract, characters 0–161 · show in text ↑
e2

“Since the fungitoxicant, p-chloronitrobenzene, had no effect on resistances to water transport, reduced resistances were probably not caused by a direct modification of the transport pathway by the fungus”

✓ located verbatim in the source · abstract, characters 377–581 · show in text ↑
Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

Reduced resistances were probably not caused by a direct modification of the transport pathway by the mycorrhizal fungus.

Taxon
Glycine maxGlycine maxe0
Interactor
funguse2symbiont
Outcome
reduced resistancese2
Qualifier
probably not caused by a direct modification of the transport pathwaye2

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“Mycorrhizal soybean (Glycine max L. Merr. var. Harosoy-63) plants have lower resistances to water transport than nonmy-corrhizal plants after 4.5 weeks of growth”

✓ located verbatim in the source · abstract, characters 0–161 · show in text ↑
e2

“Since the fungitoxicant, p-chloronitrobenzene, had no effect on resistances to water transport, reduced resistances were probably not caused by a direct modification of the transport pathway by the fungus”

✓ located verbatim in the source · abstract, characters 377–581 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Application of nutrients to the soil essentially eliminated the resistance differences between mycorrhizal and nonmycorrhizal soybean.

Taxon
soybeanGlycine maxe3
Treatment
application of nutrients to the soile3
Outcome
Differences in resistancee3
Direction
eliminatede3
Comparator
nonmycorrhizale3

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e3

“Differences in resistance between mycorrhizal and nonmycorrhizal soybean were essentialy eliminated by the application of nutrients to the soil”

✓ located verbatim in the source · abstract, characters 583–726 · show in text ↑
Mechanismauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

Lowered resistances of mycorrhizal roots growing in low-nutrient soil probably resulted from the enhanced nutrient status of the plant brought about by the fungus.

Taxon
Glycine maxGlycine maxe0
Treatment
growing in soil with low levels of nutrientse4
Interactor
funguse4symbiont
Outcome
lowered resistances of mycorrhizal rootse4
Qualifier
enhanced nutrient status of the plante4

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“Mycorrhizal soybean (Glycine max L. Merr. var. Harosoy-63) plants have lower resistances to water transport than nonmy-corrhizal plants after 4.5 weeks of growth”

✓ located verbatim in the source · abstract, characters 0–161 · show in text ↑
e4

“lowered resistances of mycorrhizal roots growing in soil with low levels of nutrients probably resulted from the enhanced nutrient status of the plant brought about by the fungus”

✓ located verbatim in the source · abstract, characters 734–912 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Mycorrhizal infection increased growth at both low and high nutrient levels.

Taxon
Glycine maxGlycine maxe0
Treatment
Mycorrhizal infectione5
Outcome
growthe5
Direction
increasede5
Qualifier
at both low and high nutrient levelse5

Not reportedComparator

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“Mycorrhizal soybean (Glycine max L. Merr. var. Harosoy-63) plants have lower resistances to water transport than nonmy-corrhizal plants after 4.5 weeks of growth”

✓ located verbatim in the source · abstract, characters 0–161 · show in text ↑
e5

“Mycorrhizal infection increased growth at both low and high nutrient levels”

✓ located verbatim in the source · abstract, characters 914–989 · show in text ↑

infection · growth · Glycine max (soybean)Positive and negative results

36 papers: 9 positive, 27 negative or no effect

8 papers in the same direction as this paper · 27 in the opposite direction

  1. negative
  2. negative
  3. negative

32 papers more in this group

See all 36 papers →

mycorrhiza · growth · Glycine max (soybean)Positive and negative results

87 papers: 79 positive, 8 negative or no effect

78 papers in the same direction as this paper · 7 in the opposite direction · 1 reporting no difference from an alternative

  1. positive
  2. positive
  3. no effect

83 papers more in this group

See all 87 papers →

mycorrhiza · disease · Glycine max (soybean)Results agree

23 papers: 23 positive, 0 negative or no effect

22 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

19 papers more in this group

See all 23 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.