Abstract
This study investigated several aspects related to drought tolerance in arbuscular mycorrhizal (AM) soybean plants. The investigation included both shoot and root tissues in order to reveal the preferred target tissue for AM effects against drought stress. Non-AM and AM soybean plants were grown under well-watered or drought-stressed conditions, and leaf water status, solute accumulation, oxidative damage to lipids, and other parameters were determined. Results showed that AM plants were protected against drought, as shown by their significantly higher shoot-biomass production. The leaf water potential was also higher in stressed AM plants (-1.9 MPa) than in non-AM plants (-2.5 MPa). The AM roots had accumulated more proline than non-AM roots, while the opposite was observed in shoots. Lipid peroxides were 55% lower in shoots of droughted AM plants than in droughted non-AM plants. Since there was no correlation between the lower oxidative damage to lipids in AM plants and the activity of antioxidant enzymes, it seems that first the AM symbiosis enhanced osmotic adjustment in roots, which could contribute to maintaining a water potential gradient favourable to the water entrance from soil into the roots. This enabled higher leaf water potential in AM plants during drought and kept the plants protected against oxidative stress, and these cumulative effects increased the plant tolerance to drought.
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 8
Claim · model-written summary
AM plants had significantly higher shoot biomass during drought.
- Taxon
- soybean
Glycine maxt0 - Treatment
- AMe0
- Outcome
- shoot-biomass productione0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AM plants were protected against drought, as shown by their significantly higher shoot-biomass production”
t0“soybean plants”
Claim · model-written summary
Stressed AM plants had higher leaf water potential, -1.9 versus -2.5 MPa.
- Taxon
- soybeanGlycine maxt0
- Treatment
- AM plantse0
- Outcome
- leaf water potentiale0
- Direction
- highere0
- Value
- -1.9 MPae0
- Qualifier
- -2.5 MPae0
- Comparator
- non-AM plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaf water potential was also higher in stressed AM plants (-1.9 MPa) than in non-AM plants (-2.5 MPa)”
t0“soybean plants”
Claim · model-written summary
AM roots accumulated more proline than non-AM roots.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- rootse0
- Treatment
- AMe0
- Outcome
- prolinee0
- Direction
- moree0
- Comparator
- non-AM rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The AM roots had accumulated more proline than non-AM roots”
t0“soybean plants”
Claim · model-written summary
AM shoots accumulated less proline than non-AM shoots.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- shootse0
- Treatment
- AMe0
- Outcome
- prolinee0
- Direction
- oppositee0
- Comparator
- non-AM rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The AM roots had accumulated more proline than non-AM roots, while the opposite was observed in shoots”
t0“soybean plants”
Claim · model-written summary
Droughted AM shoots had 55% lower lipid peroxides than non-AM shoots.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- shootse0
- Treatment
- AM plantse0
- Outcome
- Lipid peroxidese0
- Direction
- lowere0
- Value
- 55%e0
- Comparator
- non-AM plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lipid peroxides were 55% lower in shoots of droughted AM plants than in droughted non-AM plants”
t0“soybean plants”
Claim · model-written summary
Lower oxidative lipid damage did not correlate with antioxidant-enzyme activity in AM plants.
- Taxon
- soybeanGlycine maxt0
- Gene
- antioxidant enzymese0
- Outcome
- oxidative damage to lipidse0
- Direction
- no correlatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no correlation between the lower oxidative damage to lipids in AM plants and the activity of antioxidant enzymes”
t0“soybean plants”
Claim · model-written summary
Authors suggest AM symbiosis enhanced root osmotic adjustment to maintain water influx and leaf water potential.
- Taxon
- soybeanGlycine maxt0
- Outcome
- osmotic adjustment in rootse0
- Qualifier
- maintaining a water potential gradient favourable to the water entrance from soil into the rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the AM symbiosis enhanced osmotic adjustment in roots, which could contribute to maintaining a water potential gradient favourable to the water entrance from soil into the roots”
t0“soybean plants”
Claim · model-written summary
Authors infer cumulative effects increased plant drought tolerance.
- Taxon
- soybeanGlycine maxt0
- Outcome
- plant tolerance to droughte0
- Qualifier
- these cumulative effectse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these cumulative effects increased the plant tolerance to drought”
t0“soybean plants”
The same questions in other papers
mycorrhiza · physiology: water · Glycine max (soybean)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
mycorrhiza · yield · Glycine max (soybean)Positive and negative results
73 papers in the same direction as this paper · 4 in the opposite direction · 1 reporting no difference from an alternative
- positive
- no effect
- negative
75 papers more in this group
See all 79 papers →mycorrhiza · physiology: osmolytes · Glycine max (soybean)Results agree
8 papers in the same direction as this paper
- positive
- positive
- positive
5 papers more in this group
See all 9 papers →mycorrhiza · molecular: metabolites · Glycine max (soybean)Results agree
15 papers in the same direction as this paper
- positive
- positive
- positive
12 papers more in this group
See all 16 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.