Abstract
Abstract Onion plants ( Allium cepa L.) inoculated in the root zone with a vesicular‐arbuscular mycorrhizal (VAM) fungus, or left uninoculated, were grown in potted soil for 230 d to determine the influence of the VAM fungus ( Glomus macrocarpum Tul. and Tul.) on soil structure. The silty clay loam soil was maintained at a moisture content between 25 and 30%. Paired inoculated (+M) and uninoculated (−M) plants were harvested (20 pairs over 150 d) beginning 80 d after planting. Relationships between plant, fungal, and soil parameters and changes with time were evaluated by regression analysis. Root colonization by the VAM fungus in +M plants ranged from 49% to 60% over the sampling period, while no mycorrhizae were detected in the ‐M plants. Total dry mass of VAM plants was five to six times that of the non‐VAM plants. Soil from the +M treatment was significantly better aggregated, more porous, and had greater water permeability than ‐M soil. Root dry mass and VAM hyphal density in the +M soil were both significantly correlated with the relative abundance of water‐stable soil macroaggregates. Correlation of root mass with aggregate abundance was stronger, however, suggesting that soil changes were mainly mediated by direct root effects of a host plant whose growth was stimulated dramatically by its VAM fungal endophyte.
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Claims 7
Claim · model-written summary
VAM root colonization in inoculated onion plants ranged from 49% to 60%.
- Taxon
- Onion
Allium cepat0 - Interactor
- Glomus macrocarpum Tul. and Tul.e1symbiont
- Outcome
- Root colonization by the VAM funguse0
- Value
- 49% to 60%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root colonization by the VAM fungus in +M plants ranged from 49% to 60% over the sampling period, while no mycorrhizae were detected in the ‐M plants.”
t0“Onion Roots”
e1“Glomus macrocarpum Tul. and Tul.”
Claim · model-written summary
No mycorrhizae were detected in uninoculated onion plants.
- Taxon
- OnionAllium cepat0
- Interactor
- Glomus macrocarpum Tul. and Tul.e1symbiont
- Outcome
- no mycorrhizae were detectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root colonization by the VAM fungus in +M plants ranged from 49% to 60% over the sampling period, while no mycorrhizae were detected in the ‐M plants.”
t0“Onion Roots”
e1“Glomus macrocarpum Tul. and Tul.”
Claim · model-written summary
VAM onion plants had five to six times the total dry mass of non-VAM plants.
- Taxon
- OnionAllium cepat0
- Treatment
- VAMe0
- Interactor
- Glomus macrocarpum Tul. and Tul.e1symbiont
- Outcome
- Total dry masse0
- Direction
- five to six timese0
- Comparator
- non‐VAM plantse0
Not reportedValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total dry mass of VAM plants was five to six times that of the non‐VAM plants.”
t0“Onion Roots”
e1“Glomus macrocarpum Tul. and Tul.”
Claim · model-written summary
Soil from inoculated onion plants was better aggregated, more porous, and more water permeable.
- Taxon
- OnionAllium cepat0
- Treatment
- +M treatmente0
- Interactor
- Glomus macrocarpum Tul. and Tul.e1symbiont
- Outcome
- Soile0
- Direction
- better aggregatede0
- Comparator
- ‐M soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil from the +M treatment was significantly better aggregated, more porous, and had greater water permeability than ‐M soil.”
t0“Onion Roots”
e1“Glomus macrocarpum Tul. and Tul.”
Claim · model-written summary
Onion root dry mass correlated significantly with water-stable soil macroaggregate abundance.
- Taxon
- OnionAllium cepat0
- Organ / stage
- Roote0
- Interactor
- Glomus macrocarpum Tul. and Tul.e1symbiont
- Outcome
- relative abundance of water‐stable soil macroaggregatese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root dry mass and VAM hyphal density in the +M soil were both significantly correlated with the relative abundance of water‐stable soil macroaggregates.”
t0“Onion Roots”
e1“Glomus macrocarpum Tul. and Tul.”
Claim · model-written summary
VAM hyphal density correlated significantly with water-stable soil macroaggregate abundance.
- Taxon
- OnionAllium cepat0
- Interactor
- Glomus macrocarpum Tul. and Tul.e1symbiont
- Outcome
- relative abundance of water‐stable soil macroaggregatese0
- Qualifier
- VAM hyphal densitye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root dry mass and VAM hyphal density in the +M soil were both significantly correlated with the relative abundance of water‐stable soil macroaggregates.”
t0“Onion Roots”
e1“Glomus macrocarpum Tul. and Tul.”
Claim · model-written summary
Root mass correlated more strongly with aggregate abundance than VAM hyphal density.
- Taxon
- OnionAllium cepat0
- Organ / stage
- roote0
- Interactor
- Glomus macrocarpum Tul. and Tul.e1symbiont
- Outcome
- aggregate abundancee0
- Direction
- strongere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Correlation of root mass with aggregate abundance was stronger, however, suggesting that soil changes were mainly mediated by direct root effects of a host plant whose growth was stimulated dramatically by its VAM fungal endophyte.”
t0“Onion Roots”
e1“Glomus macrocarpum Tul. and Tul.”
The same questions in other papers
mycorrhiza · growth · Allium cepa (onion)Results differ
47 papers in the same direction as this paper · 4 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- no effect
49 papers more in this group
See all 53 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.