Abstract
SUMMARY Arbuscular mycorrhizal (AM) fungi increase nitrogen (N) uptake by their host plants, but their role in plant N capture from soil organic material is still unclear. In particular, it is not clear if AM fungi compete with the host plant for the N coming from the decomposing organic matter (OM), especially when the AM extraradical mycelium (ERM) and plant roots share the same soil volume. The goal of the present research was to study the effects of AM fungi on wheat N capture after the addition of 15 N-labelled OM to soil. Durum wheat ( Triticum durum ) was grown under controlled conditions in a sand:soil mix and the following treatments were applied: (1) AM inoculation with Glomus mosseae and uninoculated control; and (2) soil amended with 15 N-enriched maize leaves and unamended soil. The addition of OM reduced plant growth and N uptake. The AM fungi increased both plant growth and N uptake compared with uninoculated control plants and the effect was enhanced when wheat was grown in soil amended with OM compared with the unamended control. Although AM fungi increased soil N mineralization rates and total plant N uptake, they strongly reduced wheat N recovery from OM, suggesting that AM fungi have marked effects on competition between plants and bacteria for the different N sources in soil.
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Claims 3
Claim · model-written summary
Organic matter addition reduced wheat growth and nitrogen uptake.
- Taxon
- Durum wheat
Triticum turgidum subsp. durume1 - Treatment
- soil amended with 15 N-enriched maize leavese1
- Outcome
- plant growth and N uptakee0
- Direction
- reducede0
- Comparator
- unamended soile1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of OM reduced plant growth and N uptake.”
e1“Durum wheat ( Triticum durum ) was grown under controlled conditions in a sand:soil mix and the following treatments were applied: (1) AM inoculation with Glomus mosseae and uninoculated control; and (2) soil amended with 15 N-enriched maize leaves and unamended soil.”
Claim · model-written summary
Mycorrhizal fungi increased wheat growth and nitrogen uptake relative to uninoculated controls.
- Taxon
- Durum wheatTriticum turgidum subsp. durume1
- Treatment
- AM inoculation with Glomus mosseaee1
- Interactor
- Glomus mosseae
Funneliformis mosseaee1symbiont - Outcome
- plant growth and N uptakee0
- Direction
- increasede0
- Comparator
- uninoculated control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The AM fungi increased both plant growth and N uptake compared with uninoculated control plants”
e1“Durum wheat ( Triticum durum ) was grown under controlled conditions in a sand:soil mix and the following treatments were applied: (1) AM inoculation with Glomus mosseae and uninoculated control; and (2) soil amended with 15 N-enriched maize leaves and unamended soil.”
Claim · model-written summary
Mycorrhizal fungi strongly reduced wheat nitrogen recovery from organic matter.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- AM inoculation with Glomus mosseaee1
- Interactor
- Glomus mosseaeFunneliformis mosseaee1symbiont
- Outcome
- wheat N recovery from OMe0
- Direction
- reducede0
- Comparator
- uninoculated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“they strongly reduced wheat N recovery from OM”
e1“Durum wheat ( Triticum durum ) was grown under controlled conditions in a sand:soil mix and the following treatments were applied: (1) AM inoculation with Glomus mosseae and uninoculated control; and (2) soil amended with 15 N-enriched maize leaves and unamended soil.”
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