Nitrogen Type and Availability Drive Mycorrhizal Effects on Wheat Performance, Nitrogen Uptake and Recovery, and Production Sustainability.

Autor:	Ingraffia R; Department of Agricultural, Food and Forest Sciences, Università degli Studi di Palermo, Palermo, Italy., Amato G; Department of Agricultural, Food and Forest Sciences, Università degli Studi di Palermo, Palermo, Italy., Sosa-Hernández MA; Plant Ecology, Institute of Biology, Freie Universität Berlin, Berlin, Germany.; Berlin-Brandenburg Institute of Advanced Biodiversity Research, Berlin, Germany., Frenda AS; Department of Agricultural, Food and Forest Sciences, Università degli Studi di Palermo, Palermo, Italy., Rillig MC; Plant Ecology, Institute of Biology, Freie Universität Berlin, Berlin, Germany.; Berlin-Brandenburg Institute of Advanced Biodiversity Research, Berlin, Germany., Giambalvo D; Department of Agricultural, Food and Forest Sciences, Università degli Studi di Palermo, Palermo, Italy.
Jazyk:	angličtina
Zdroj:	Frontiers in plant science [Front Plant Sci] 2020 Jun 19; Vol. 11, pp. 760. Date of Electronic Publication: 2020 Jun 19 (Print Publication: 2020).
DOI:	10.3389/fpls.2020.00760
Abstrakt:	Plant performance is strongly dependent on nitrogen (N), and thus increasing N nutrition is of great relevance for the productivity of agroecosystems. The effects of arbuscular mycorrhizal (AM) fungi on plant N acquisition are debated because contradictory results have been reported. Using 15 N-labeled fertilizers as a tracer, we evaluated the effects of AM fungi on N uptake and recovery from mineral or organic sources in durum wheat. Under sufficient N availability, AM fungi had no effects on plant biomass but increased N concentrations in plant tissue, plant N uptake, and total N recovered from the fertilizer. In N-deficient soil, AM fungi led to decreased aboveground biomass, which suggests that plants and AM fungi may have competed for N. When the organic source had a low C:N ratio, AM fungi favored both plant N uptake and N recovery. In contrast, when the organic source had a high C:N ratio, a clear reduction in N recovery from the fertilizer was observed. Overall, the results indicate an active role of arbuscular mycorrhizae in favoring plant N-related traits when N is not a limiting factor and show that these fungi help in N recovery from the fertilizer. These results hold great potential for increasing the sustainability of durum wheat production. (Copyright © 2020 Ingraffia, Amato, Sosa-Hernández, Frenda, Rillig and Giambalvo.)
Databáze:	MEDLINE
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