Abstract
Abstract Soybean (Glycine max (L.) Merr.) plants nodulated with Bradyrhizobium japonicum. Nitragin strain 61A118, were grown with or without the vesicular‐arbuscular mycorrhizal (VAM) fungus Glomus mosseae (Nicol. Gerd.) Gerd. and Trappe in pot cultures in soil high (40.4 μg/g) in available Mn. Leaves of the nonVAM plants showed severe symptoms of Mn toxicity and had toxic (314 μg/g) concentrations of Mn in the foliage. NonVAM plants had significantly lower dry weights and nodule mass than VAM plants. Concentrations of Mn in the VAM plants were significantly (P<0.05) lower than in the nonVAM plants, and there were no symptoms of Mn toxicity. Both VAM and nonVAM plants had a significant negative correlation between shoot dry mass and leaf Mn concentration. Since levels of Mn increased with increasing VAM‐fungal colonization, we conclude that it was not the VAM condition per se which alleviated Mn toxicity. We suggest that the significantly higher levels of Mn in the leaves (P<0.05) and the roots (P<0.001) of nonVAM plants was due to increased uptake of Mn by the nonVAM plants. This exudation, which are generally observed in nonVAM plants, and to the role of such exudates in solubilizing MnO2 and chelating the resulting Mn2∗ for facilitated absorption.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 12
Claim · model-written summary
Nonmycorrhizal soybean leaves showed severe manganese toxicity symptoms.
- Taxon
- Soybean
Glycine maxe0 - Material
- nonVAM plantse1
- Organ / stage
- Leavese1
- Outcome
- severe symptoms of Mn toxicitye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean (Glycine max (L.) Merr.) plants”
e1“Leaves of the nonVAM plants showed severe symptoms of Mn toxicity and had toxic (314 μg/g) concentrations of Mn in the foliage.”
Claim · model-written summary
Nonmycorrhizal soybean foliage contained 314 μg/g manganese.
- Taxon
- SoybeanGlycine maxe0
- Material
- nonVAM plantse1
- Organ / stage
- foliagee1
- Outcome
- concentrations of Mn in the foliagee1
- Value
- 314 μg/ge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean (Glycine max (L.) Merr.) plants”
e1“Leaves of the nonVAM plants showed severe symptoms of Mn toxicity and had toxic (314 μg/g) concentrations of Mn in the foliage.”
Claim · model-written summary
Nonmycorrhizal soybeans had lower dry weights than mycorrhizal soybeans.
- Taxon
- SoybeanGlycine maxe0
- Treatment
- NonVAM plantse1
- Outcome
- dry weightse1
- Direction
- lowere1
- Comparator
- VAM plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean (Glycine max (L.) Merr.) plants”
e1“NonVAM plants had significantly lower dry weights and nodule mass than VAM plants.”
Claim · model-written summary
Nonmycorrhizal soybeans had lower nodule mass than mycorrhizal soybeans.
- Taxon
- SoybeanGlycine maxe0
- Treatment
- NonVAM plantse1
- Outcome
- nodule masse1
- Direction
- lowere1
- Comparator
- VAM plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean (Glycine max (L.) Merr.) plants”
e1“NonVAM plants had significantly lower dry weights and nodule mass than VAM plants.”
Claim · model-written summary
Mycorrhizal soybean manganese concentration was lower than in nonmycorrhizal soybean.
- Taxon
- SoybeanGlycine maxe0
- Treatment
- VAM plantse1
- Outcome
- Concentrations of Mne1
- Direction
- lowere1
- Comparator
- nonVAM plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean (Glycine max (L.) Merr.) plants”
e1“Concentrations of Mn in the VAM plants were significantly (P<0.05) lower than in the nonVAM plants”
Claim · model-written summary
Mycorrhizal soybean had no manganese toxicity symptoms.
- Taxon
- SoybeanGlycine maxe0
- Outcome
- no symptoms of Mn toxicitye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean (Glycine max (L.) Merr.) plants”
e1“and there were no symptoms of Mn toxicity.”
Claim · model-written summary
Shoot dry mass and leaf manganese concentration were negatively correlated in mycorrhizal soybean.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean (Glycine max (L.) Merr.) plants”
e1“Both VAM and nonVAM plants had a significant negative correlation between shoot dry mass and leaf Mn concentration.”
Claim · model-written summary
Shoot dry mass and leaf manganese concentration were negatively correlated in nonmycorrhizal soybean.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean (Glycine max (L.) Merr.) plants”
e1“Both VAM and nonVAM plants had a significant negative correlation between shoot dry mass and leaf Mn concentration.”
Claim · model-written summary
Manganese levels increased with VAM fungal colonization.
- Taxon
- SoybeanGlycine maxe0
- Interactor
- VAM‐fungale1symbiont
- Outcome
- levels of Mne1
- Direction
- increasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean (Glycine max (L.) Merr.) plants”
e1“Since levels of Mn increased with increasing VAM‐fungal colonization”
Claim · model-written summary
The authors concluded that the VAM condition itself did not alleviate manganese toxicity.
- Taxon
- SoybeanGlycine maxe0
- Outcome
- Mn toxicitye1
- Qualifier
- not the VAM condition per see1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean (Glycine max (L.) Merr.) plants”
e1“we conclude that it was not the VAM condition per se which alleviated Mn toxicity.”
Claim · model-written summary
The authors attribute higher leaf manganese in nonmycorrhizal soybean to increased manganese uptake.
- Taxon
- SoybeanGlycine maxe0
- Outcome
- higher levels of Mn in the leavese1
- Qualifier
- increased uptake of Mne1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean (Glycine max (L.) Merr.) plants”
e1“We suggest that the significantly higher levels of Mn in the leaves (P<0.05) and the roots (P<0.001) of nonVAM plants was due to increased uptake of Mn by the nonVAM plants.”
Claim · model-written summary
The authors attribute higher root manganese in nonmycorrhizal soybean to increased manganese uptake.
- Taxon
- SoybeanGlycine maxe0
- Outcome
- higher levels of Mn in the leaves (P<0.05) and the rootse1
- Qualifier
- increased uptake of Mne1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean (Glycine max (L.) Merr.) plants”
e1“We suggest that the significantly higher levels of Mn in the leaves (P<0.05) and the roots (P<0.001) of nonVAM plants was due to increased uptake of Mn by the nonVAM plants.”
The same questions in other papers
mycorrhiza · nutrient: content · Glycine max (soybean)Positive and negative results
49 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
48 papers more in this group
See all 52 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.