Arbuscular mycorrhizal effects on plant water relations and soil greenhouse gas emissions under changing moisture regimes

Lazcano, Cristina; Barrios-Masias, Felipe H.; Jackson, Louise E.

doi:10.1016/j.soilbio.2014.03.010

Cited by 85 publications

(54 citation statements)

References 45 publications

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“…Bender et al (2015) found that the N 2 O flux was lower following the application of NO 3 À in the AM mycorrhizosphere when compared with the rhizosphere of a nonAM control. By contrast, Cavagnaro et al (2012) found no effect of AM plants on N 2 O production, whereas Lazcano et al (2014) found a reduction in N 2 O in the mycorrhizosphere of AM plants. Thus, there is support for AMF resulting in reduced N 2 O production in the mycorrhizosphere, but the cause of this reduction has so far been poorly understood, probably because of confounding effects of the host plant root system also being present.…”

Section: Researchmentioning

confidence: 79%

“…() found no effect of AM plants on N 2 O production, whereas Lazcano et al . () found a reduction in N 2 O in the mycorrhizosphere of AM plants. Thus, there is support for AMF resulting in reduced N 2 O production in the mycorrhizosphere, but the cause of this reduction has so far been poorly understood, probably because of confounding effects of the host plant root system also being present.…”

Section: Discussionmentioning

confidence: 94%

“…Moreover, this reduction was demonstrated in both the presence and, notably, the absence of applied inorganic N, indicating that this is a persistent effect. Studies to date have indicated that AMF may influence soil N 2 O production, but this has always been in the presence of plant roots and additional inorganic N (Lazcano et al ., ; Bender et al ., ). Critically, the finding that N 2 O production was reduced when AMF hyphae, but not plant roots, were present was consistent between the two independent experiments reported here.…”

Section: Discussionmentioning

confidence: 98%

“…Thus, there is support for AMF resulting in reduced N 2 O production in the mycorrhizosphere, but the cause of this reduction has so far been poorly understood, probably because of confounding effects of the host plant root system also being present. Hypotheses for the decreased N 2 O production in the mycorrhizosphere included a reduction in denitrification and increased water use by AM plants (Lazcano et al, 2014).…”

Section: Researchmentioning

confidence: 99%

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Arbuscular mycorrhizal fungi reduce nitrous oxide emissions from N₂O hotspots

et al. 2017

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Summary Nitrous oxide (N2O) is a potent, globally important, greenhouse gas, predominantly released from agricultural soils during nitrogen (N) cycling. Arbuscular mycorrhizal fungi (AMF) form a mutualistic symbiosis with two‐thirds of land plants, providing phosphorus and/or N in exchange for carbon. As AMF acquire N, it was hypothesized that AMF hyphae may reduce N2O production. AMF hyphae were either allowed (AMF) or prevented (nonAMF) access to a compartment containing an organic matter and soil patch in two independent microcosm experiments. Compartment and patch N2O production was measured both before and after addition of ammonium and nitrate.In both experiments, N2O production decreased when AMF hyphae were present before inorganic N addition. In the presence of AMF hyphae, N2O production remained low following ammonium application, but increased in the nonAMF controls. By contrast, negligible N2O was produced following nitrate application to either AMF treatment.Thus, the main N2O source in this system appeared to be via nitrification, and the production of N2O was reduced in the presence of AMF hyphae. It is hypothesized that AMF hyphae may be outcompeting slow‐growing nitrifiers for ammonium. This has significant global implications for our understanding of soil N cycling pathways and N2O production.

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Section: Researchmentioning

confidence: 79%

Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 98%

Section: Researchmentioning

confidence: 99%

See 2 more Smart Citations

Arbuscular mycorrhizal fungi reduce nitrous oxide emissions from N₂O hotspots

et al. 2017

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“…Mycorrhizal symbiosis can benefit from carbon provided by host plants and make larger contributions to plant growth nutrient and water uptake. Studies in the past had demonstrated that AMF had the potential capacity to enhance drought tolerance of host plants under DS (Kapoor et al, 2004;Lazcano et al, 2014). Underlying mechanisms under mycorrhization attribute to increasing water uptake and transport by external hyphae at low soil moisture level, improving osmotic adjustment by means of accumulating osmoprotectants (sugar, protein, proline, etc.…”

Section: Introductionmentioning

confidence: 99%

Alleviation of Drought Stress in White Clover after Inoculation with Arbuscular Mycorrhizal Fungi

Tuo

Zou

2017

Not Bot Horti Agrobo

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White clover is extremely susceptive to drought stress (DS), while it is not clear whether arbuscular mycorrhizal fungi (AMF) enhance drought tolerance of the plant. This study was carried out to evaluate effects of two AMF species, Funneliformis mosseae and Paraglomus occultum, on flavonoid, soluble protein, proline, and nutrient uptake in roots of white clover under well-watered (WW) and DS conditions. Root colonization by F. mosseae and P. occultum was heavily decreased by 7-week DS treatment. Mycorrhizal plants showed considerably greater biomass production in shoot, root, and total (shoot+root) than non-mycorrhizal plants, irrespective of soil water status. AMF inoculation led to significantly higher root soluble protein and proline accumulation under WW and DS and root flavonoid level under DS, regardless of AMF species. Root N, P, K and Cu concentrations were dramatically increased by mycorrhization under WW and DS, and root Ca, Mg, Fe, and Mn levels were significantly higher in AMF plants than in non-AMF plants under WW. It concluded that AMF strongly enhanced plant growth and drought tolerance of white clover by greater nutrient absorption and protective substances (soluble protein, proline, and flavonoid) accumulation.

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Arbuscular mycorrhizal fungi alleviate the negative effect of nitrogen deposition on ecosystem functions in meadow grassland

et al. 2019

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Nitrogen (N) deposition can reduce plant species richness and cause grassland degradation, thus affecting grassland ecosystem stability. Arbuscular mycorrhizal (AM) fungi play an important role in ecosystem stability. However, the influences of AM fungi on grassland ecosystem stability under N deposition remain unclear. We need more information on the impacts of N accumulation on the interactions between AM fungi and the plant community. To test the contribution of AM fungi to grassland stability under N deposition, a 5‐year field experiment was conducted in a temperate meadow with two manipulated factors, namely, N addition and AM fungi suppression. The plant species richness and diversity, biomass stability, litter decomposition, and greenhouse gas emissions were quantified. Under N addition, AM fungi did not affect the plant species diversity and richness but altered the coverages of different functional groups and increased the aboveground productivity and biomass stability. Litter decomposition increased under N addition and increased more in the treatment where AM fungi were not suppressed. The emissions of N2O and CH4 in the AM fungi suppression treatment were much higher than those in the nonsuppression treatment under N addition. Our results suggest that AM fungi can alter the plant community structure, increase plant productivity and community biomass stability, accelerate litter decomposition, and reduce the soil total N concentration and emissions of N2O and CH4 under N addition. Our results highlight that the conservation of AM fungi should be considered to alleviate grassland degradation and maintain grassland ecosystem multifunctionality in the future considering global change.

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Arbuscular mycorrhizal effects on plant water relations and soil greenhouse gas emissions under changing moisture regimes

Cited by 85 publications

References 45 publications

Arbuscular mycorrhizal fungi reduce nitrous oxide emissions from N₂O hotspots

Arbuscular mycorrhizal fungi reduce nitrous oxide emissions from N₂O hotspots

Alleviation of Drought Stress in White Clover after Inoculation with Arbuscular Mycorrhizal Fungi

Arbuscular mycorrhizal fungi alleviate the negative effect of nitrogen deposition on ecosystem functions in meadow grassland

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Arbuscular mycorrhizal effects on plant water relations and soil greenhouse gas emissions under changing moisture regimes

Cited by 85 publications

References 45 publications

Arbuscular mycorrhizal fungi reduce nitrous oxide emissions from N2O hotspots

Arbuscular mycorrhizal fungi reduce nitrous oxide emissions from N2O hotspots

Alleviation of Drought Stress in White Clover after Inoculation with Arbuscular Mycorrhizal Fungi

Arbuscular mycorrhizal fungi alleviate the negative effect of nitrogen deposition on ecosystem functions in meadow grassland

Contact Info

Product

Resources

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Arbuscular mycorrhizal fungi reduce nitrous oxide emissions from N₂O hotspots

Arbuscular mycorrhizal fungi reduce nitrous oxide emissions from N₂O hotspots