Abstract
BACKGROUND AND AIMS: Arbuscular mycorrhizal (AM) fungi play a key role in the phosphate (P) uptake of many important crop species, but the mechanisms that control their efficiency and their contribution to the P nutrition of the host plant are only poorly understood. METHODS: The P uptake and growth potential of two soybean genotypes that differ in their root architectural traits and P acquisition efficiency were studied after colonization with different AM fungi and the transcript levels of plant P transporters involved in the plant or mycorrhizal P uptake pathway were examined. KEY RESULTS: The mycorrhizal growth responses of both soybean genotypes ranged from highly beneficial to detrimental, and were dependent on the P supply conditions, and the fungal species involved. Only the colonization with Rhizophagus irregularis increased the growth and P uptake of both soybean genotypes. The expression of GmPT4 was downregulated, while the mycorrhiza-inducible P transporter GmPT10 was upregulated by colonization with R. irregularis Colonization with both fungi also led to higher transcript levels of the mycorrhiza-inducible P transporter GmPT9, but only in plants colonized with R. irregularis were the higher transcript levels correlated to a better P supply. CONCLUSIONS: The results suggest that AM fungi can also significantly contribute to the P uptake and growth potential of genotypes with a higher P acquisition efficiency, but that mycorrhizal P benefits depend strongly on the P supply conditions and the fungal species involved.
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Claims 8
Claim · model-written summary
Mycorrhizal growth responses ranged from beneficial to detrimental across P conditions and fungal species.
- Taxon
- soybean
Glycine maxt0 - Material
- soybean genotypese0
- Outcome
- mycorrhizal growth responsese0
- Qualifier
- P supply conditions, and the fungal species involvede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mycorrhizal growth responses of both soybean genotypes ranged from highly beneficial to detrimental, and were dependent on the P supply conditions, and the fungal species involved.”
t0“soybean”
Claim · model-written summary
Rhizophagus irregularis colonization increased growth of both soybean genotypes.
- Taxon
- soybeanGlycine maxe0
- Treatment
- colonization with Rhizophagus irregularise0
- Interactor
- Rhizophagus irregularis
Rhizophagus irregularise0symbiont - Outcome
- growthe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only the colonization with Rhizophagus irregularis increased the growth and P uptake of both soybean genotypes.”
Claim · model-written summary
Rhizophagus irregularis colonization increased P uptake of both soybean genotypes.
- Taxon
- soybeanGlycine maxe0
- Treatment
- colonization with Rhizophagus irregularise0
- Interactor
- Rhizophagus irregularisRhizophagus irregularise0symbiont
- Outcome
- P uptakee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only the colonization with Rhizophagus irregularis increased the growth and P uptake of both soybean genotypes.”
Claim · model-written summary
R. irregularis colonization downregulated GmPT4 expression.
- Taxon
- soybeanGlycine maxt0
- Treatment
- colonization with R. irregularise0
- Interactor
- R. irregularisRhizophagus irregularise0symbiont
- Gene
- GmPT4e0
- Outcome
- expression of GmPT4e0
- Direction
- downregulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The expression of GmPT4 was downregulated, while the mycorrhiza-inducible P transporter GmPT10 was upregulated by colonization with R. irregularis”
t0“soybean”
Claim · model-written summary
R. irregularis colonization upregulated GmPT10.
- Taxon
- soybeanGlycine maxt0
- Treatment
- colonization with R. irregularise0
- Interactor
- R. irregularisRhizophagus irregularise0symbiont
- Gene
- GmPT10e0
- Outcome
- P transporter GmPT10e0
- Direction
- upregulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The expression of GmPT4 was downregulated, while the mycorrhiza-inducible P transporter GmPT10 was upregulated by colonization with R. irregularis”
t0“soybean”
Claim · model-written summary
Colonization with both fungi increased GmPT9 transcript levels.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Colonization with both fungie0
- Gene
- GmPT9e0
- Outcome
- transcript levelse0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Colonization with both fungi also led to higher transcript levels of the mycorrhiza-inducible P transporter GmPT9, but only in plants colonized with R. irregularis were the higher transcript levels correlated to a better P supply.”
t0“soybean”
Claim · model-written summary
In R. irregularis-colonized plants, higher transcript levels correlated with better P supply.
- Taxon
- soybeanGlycine maxt0
- Interactor
- R. irregularisRhizophagus irregularise0symbiont
- Outcome
- P supplye0
- Direction
- bettere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only in plants colonized with R. irregularis were the higher transcript levels correlated to a better P supply.”
t0“soybean”
Claim · model-written summary
The authors infer AM fungi can contribute to P uptake even in P-efficient genotypes, subject to P supply and fungus identity.
- Taxon
- soybeanGlycine maxt0
- Interactor
- AM fungiGlomeromycotae0symbiont
- Outcome
- P uptakee0
- Qualifier
- P supply conditions and the fungal species involvede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AM fungi can also significantly contribute to the P uptake and growth potential of genotypes with a higher P acquisition efficiency, but that mycorrhizal P benefits depend strongly on the P supply conditions and the fungal species involved.”
t0“soybean”
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