Improving phosphorus sustainability in intensively managed grasslands: The potential role of arbuscular mycorrhizal fungi

Fornara, Dario; Flynn, David; Caruso, Tancredi

doi:10.1016/j.scitotenv.2019.135744

Cited by 16 publications

(8 citation statements)

References 44 publications

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“…It might be due to the relatively low levels of available P in the soil in all treatments (<10 mg available P kg -1 soil). Fornara et al (2019) reported that when soil available P concentration reached 50 mg kg -1 and beyond, AMF colonization rate decreased significantly. On the other hand, AM fungi may be parasitic to their host plants if the net cost of AM symbiosis exceeds the net benefit (Johnson et al, 1997).…”

Section: Discussionmentioning

confidence: 99%

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The Interaction of Arbuscular Mycorrhizal Fungi and Phosphorus Inputs on Selenium Uptake by Alfalfa (Medicago sativa L.) and Selenium Fraction Transformation in Soil

Pan

Zhang

et al. 2020

Front. Plant Sci.

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Selenium (Se) is a beneficial element to plants and an essential element to humans. Colonization by arbuscular mycorrhizal fungi (AMF) and supply of phosphorus (P) fertilizer may affect the bioavailability of Se in soils and the absorption of Se by plants. To investigate the interaction between AMF and P fertilizer on the transformation of soil Se fractions and the availability of Se in the rhizosphere of alfalfa, we conducted a pot experiment to grow alfalfa in a loessial soil with three P levels (0, 5, and 20 mg kg-1) and two mycorrhizal inoculation treatments (without mycorrhizal inoculation [−AMF] and with mycorrhizal inoculation [+AMF]), and the interaction between the two factors was estimated with two-way ANOVA. The soil in all pots was supplied with Se (Na 2 SeO 3) at 1 mg kg-1. In our results, shoot Se concentration decreased, but plant Se content increased significantly as P level increased and had a significant positive correlation with AMF colonization rate. The amount of total carboxylates in the rhizosphere was strongly affected by AMF. The amounts of rhizosphere carboxylates and alkaline phosphatase activity in the +AMF and 0P treatments were significantly higher than those in other treatments. The concentration of exchangeable-Se in rhizosphere soil had a positive correlation with carboxylates. We speculated that rhizosphere carboxylates promoted the transformation of stable Se (iron oxide-bound Se) into available Se forms, i.e. exchangeable Se and soluble Se. Colonization by AMF and low P availability stimulated alfalfa roots to release more carboxylates and alkaline phosphatase. AMF and P fertilizer affected the transformation of soil Se fractions in the rhizosphere of alfalfa.

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Section: Discussionmentioning

confidence: 99%

“…It might be due to the relatively low levels of available P in the soil in all treatments (<10 mg available P kg -1 soil). Fornara et al. (2019) reported that when soil available P concentration reached 50 mg kg -1 and beyond, AMF colonization rate decreased significantly.…”

Section: Discussionmentioning

confidence: 99%

The Interaction of Arbuscular Mycorrhizal Fungi and Phosphorus Inputs on Selenium Uptake by Alfalfa (Medicago sativa L.) and Selenium Fraction Transformation in Soil

Pan

Zhang

et al. 2020

Front. Plant Sci.

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“…These results were mainly attributed to the increase in soil nutrients, and the increase in soil nutrients reduced the dependence of host plants on AMF. Meanwhile, previous studies have found a negative relationship between soil P availability and the richness and diversity of AMF [ 64 , 65 ]; the decrease in native mycorrhizal colonization in this study may be related to the increase in soil nutrient contents such as P and decrease in AMF abundance caused by agronomic measures such as the grass–legume mixture [ 66 , 67 ]. However, the effects of organic fertilizer on mycorrhizal fungi need further study.…”

Section: Discussionmentioning

confidence: 47%

Grass–Legume Mixture with Rhizobium Inoculation Enhanced the Restoration Effects of Organic Fertilizer

Zhang

Zheng

et al. 2023

Microorganisms

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The establishment of artificial grassland is crucial in restoring degraded grassland and resolving the forage–livestock conflict, and the application of organic fertilizer and complementary seeding of grass–legume mixture are effective methods to enhance grass growth in practice. However, its mechanism behind the underground is largely unclear. Here, by utilizing organic fertilizer in the alpine region of the Qinghai–Tibet Plateau, this study assessed the potential of grass–legume mixtures with and without the inoculation of Rhizobium for the restoration of degraded grassland. The results demonstrated that the application of organic fertilizer can increase the forage yield and soil nutrient contents of degraded grassland, and they were 0.59 times and 0.28 times higher than that of the control check (CK), respectively. The community composition and structure of soil bacteria and fungi were also changed by applying organic fertilizer. Based on this, the grass–legume mixture inoculated with Rhizobium can further increase the contribution of organic fertilizer to soil nutrients and thus enhance the restoration effects for degraded artificial grassland. Moreover, the application of organic fertilizer significantly increased the colonization of gramineous plant by native mycorrhizal fungi, which was ~1.5–2.0 times higher than CK. This study offers a basis for the application of organic fertilizer and grass–legume mixture in the ecological restoration of degraded grassland.

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“…High SRP concentrations in agricultural fields are likely to reduce mycorrhizal infections [136]. Therefore, the amount of fertilizer P should be judicious [137][138][139].…”

Section: Mycorrhizae Landscapes and Soilsmentioning

confidence: 99%

Potential for Mycorrhizae-Assisted Phytoremediation of Phosphorus for Improved Water Quality

Rubin

Görres

2020

IJERPH

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During this 6th Great Extinction, freshwater quality is imperiled by upland terrestrial practices. Phosphorus, a macronutrient critical for life, can be a concerning contaminant when excessively present in waterways due to its stimulation of algal and cyanobacterial blooms, with consequences for ecosystem functioning, water use, and human and animal health. Landscape patterns from residential, industrial and agricultural practices release phosphorus at alarming rates and concentrations threaten watershed communities. In an effort to reconcile the anthropogenic effects of phosphorus pollution, several strategies are available to land managers. These include source reduction, contamination event prevention and interception. A total of 80% of terrestrial plants host mycorrhizae which facilitate increased phosphorus uptake and thus removal from soil and water. This symbiotic relationship between fungi and plants facilitates a several-fold increase in phosphorus uptake. It is surprising how little this relationship has been encouraged to mitigate phosphorus for water quality improvement. This paper explores how facilitating this symbiosis in different landscape and land-use contexts can help reduce the application of fertility amendments, prevent non-point source leaching and erosion, and intercept remineralized phosphorus before it enters surface water ecosystems. This literature survey offers promising insights into how mycorrhizae can aid ecological restoration to reconcile humans’ damage to Earth’s freshwater. We also identify areas where research is needed.

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Improving phosphorus sustainability in intensively managed grasslands: The potential role of arbuscular mycorrhizal fungi

Cited by 16 publications

References 44 publications

The Interaction of Arbuscular Mycorrhizal Fungi and Phosphorus Inputs on Selenium Uptake by Alfalfa (Medicago sativa L.) and Selenium Fraction Transformation in Soil

The Interaction of Arbuscular Mycorrhizal Fungi and Phosphorus Inputs on Selenium Uptake by Alfalfa (Medicago sativa L.) and Selenium Fraction Transformation in Soil

Grass–Legume Mixture with Rhizobium Inoculation Enhanced the Restoration Effects of Organic Fertilizer

Potential for Mycorrhizae-Assisted Phytoremediation of Phosphorus for Improved Water Quality

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