Axenic growth of the arbuscular mycorrhizal fungus Rhizophagus irregularis and growth stimulation by coculture with plant growth-promoting rhizobacteria

Abdellatif, Lobna; Lokuruge, Prabhath; Hamel, Chantal

doi:10.1007/s00572-019-00924-z

Cited by 12 publications

(10 citation statements)

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“…The AMF depend on a host for their carbon needs (Rich et al, 2017) and the persistence of AMF for such a long period of time in absence of mycotrophic host plants is unexpected. However, axenic AMF growth is known to be stimulated in vitro by coculture with plant growth-promoting bacteria (Abdellatif et al, 2019). Thus, the report of Floc'h et al (2021) motivated the verification of this hypothesis: We expect that canola negatively impacts the AMF community in function of its frequency in crop rotations.…”

Section: Introductionmentioning

confidence: 88%

“…The fact that almost all the AMF in canola rhizosphere and bulk soil had a bacterial cohort in the network analysis comfort the possibility that bacteria could bring advantage to AMF in a hostile environment, facilitating interface with nonhost plant. Bacteria acting as host for AMF remains another possibility (Hildebrandt et al, 2006;Horii and Ishii, 2014;Abdellatif et al, 2019).…”

Section: How An Arbuscular Mycorrhizal Fungi Community Persists After...mentioning

confidence: 99%

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Long-Term Persistence of Arbuscular Mycorrhizal Fungi in the Rhizosphere and Bulk Soils of Non-host Brassica napus and Their Networks of Co-occurring Microbes

et al. 2022

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Arbuscular mycorrhizal fungi (AMF) are obligate plant symbionts that improve the nutrition and health of their host. Most, but not all the crops form a symbiosis with AMF. It is the case for canola (Brassica napus), an important crop in the Canadian Prairies that is known to not form this association. From 2008 to 2018, an experiment was replicated at three locations of the Canadian Prairies and it was used to assess the impact of canola on the community of AMF naturally occurring in three cropping systems, canola monoculture, or canola in two different rotation systems (2-years, canola-wheat and 3-years, barley-pea-canola). We sampled canola rhizosphere and bulk soils to: (i) determine diversity and community structure of AMF, we expected that canola will negatively impact AMF communities in function of its frequency in crop rotations and (ii) wanted to assess how these AMF communities interact with other fungi and bacteria. We detected 49 AMF amplicon sequence variants (ASVs) in canola rhizosphere and bulk soils, confirming the persistence of a diversified AMF community in canola-planted soil, even after 10 years of canola monoculture, which was unexpected considering that canola is among non-mycorrhizal plants. Network analysis revealed a broad range of potential interactions between canola-associated AMF and some fungal and bacterial taxa. We report for the first time that two AMF, Funneliformis mosseae and Rhizophagus iranicus, shared their bacterial cohort almost entirely in bulk soil. Our results suggest the existence of non-species-specific AMF-bacteria or AMF-fungi relationships that could benefit AMF in absence of host plants. The persistence of an AMF community in canola rhizosphere and bulk soils brings a new light on AMF ecology and leads to new perspectives for further studies about AMF and soil microbes interactions and AMF subsistence without mycotrophic host plants.

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Section: Introductionmentioning

confidence: 88%

Section: How An Arbuscular Mycorrhizal Fungi Community Persists After...mentioning

confidence: 99%

Long-Term Persistence of Arbuscular Mycorrhizal Fungi in the Rhizosphere and Bulk Soils of Non-host Brassica napus and Their Networks of Co-occurring Microbes

et al. 2022

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“…AM fungi are used as bio-inoculants, and as prominent natural growth regulators in sustainable crop productivity. Also, the stomatal conductance, leaf water potential, relative water content, photosystem II efficiency, and carbon dioxide assimilation are improved by AM inoculation that contribute greatly to organic culturing for growth promotion and yield maximization [30][31][32].…”

Section: Natural Growth Regulatorsmentioning

confidence: 99%

Arbuscular Mycorrhizal (AM) Fungi as a Tool for Sustainable Agricultural System

Chahal¹,

Gupta²,

Verma³

et al. 2021

Mycorrhizal Fungi - Utilization in Agriculture and Industry

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A sustainable agriculture is a type of agriculture that focuses on producing long-term crops and livestock without having any adverse effect on the environment. However, agricultural malpractices like excessive use of chemical fertilizers and pesticides, as well as climate change have aggravated the effects of biotic and abiotic stresses on crop productivity. These led to the degradation of ecosystem, leaving bad impacts on the soil qualities and water body environment. As an alternative to the rising agricultural energy, the use of Vesicular– Arbuscular Mycorrhizae (AM) may be a better option. Being natural root symbionts, AM provide essential inorganic nutrients to host plants, thereby improving its growth and yield even under stressed conditions. AM fungi can also potentially strengthen the adaptability of a plant to the changing environment, as a bio-fertilizer. The chapter provides a comprehensive up-to-date knowledge on AM fungi as a tool for sustainable agricultural system. Thus, further research focusing on the AM -mediated promotion of crop quality and productivity is needed.

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“…Most likely, lipid is transported as 2-monopalmitin; however, it has also been shown that R. irregularis can grow on myristate ( 47 ). These findings have been exploited to develop an axenic culture medium on which the obligate biotroph can grow up to the production of fertile spores ( 48 ).…”

Section: Introductionmentioning

confidence: 99%

Genome-Scale Modeling Specifies the Metabolic Capabilities of Rhizophagus irregularis

Wendering

Nikoloski

2022

mSystems

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Mounting evidence points to the benefits of the symbiotic interactions between the arbuscular mycorrhiza fungus Rhizophagus irregularis and crops; however, the molecular mechanisms underlying the physiological responses of this fungus to different host plants and environments remain largely unknown. We present a manually curated, enzyme-constrained, genome-scale metabolic model of R. irregularis that can accurately predict experimentally observed phenotypes.

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Axenic growth of the arbuscular mycorrhizal fungus Rhizophagus irregularis and growth stimulation by coculture with plant growth-promoting rhizobacteria

Cited by 12 publications

References 50 publications

Long-Term Persistence of Arbuscular Mycorrhizal Fungi in the Rhizosphere and Bulk Soils of Non-host Brassica napus and Their Networks of Co-occurring Microbes

Long-Term Persistence of Arbuscular Mycorrhizal Fungi in the Rhizosphere and Bulk Soils of Non-host Brassica napus and Their Networks of Co-occurring Microbes

Arbuscular Mycorrhizal (AM) Fungi as a Tool for Sustainable Agricultural System

Genome-Scale Modeling Specifies the Metabolic Capabilities of Rhizophagus irregularis

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