Sulfate fertilization supports growth of ryegrass in soil columns but changes microbial community structures and reduces abundances of nematodes and arbuscular mycorrhiza

Ikoyi, Israel; Fowler, A. C.; Storey, Sean; Doyle, Evelyn

doi:10.1016/j.scitotenv.2019.135315

Cited by 19 publications

(8 citation statements)

References 48 publications

(1 reference statement)

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“…These changes in microbial community structure may have cascading effects on higher trophic levels. The lower fungi‐to‐bacteria ratios of N‐fertilized soils should favor bacterivores and disfavor fungivores, as has been reported with nematodes (Emery et al, 2017; Gruzdeva et al, 2007; Murray et al, 2006; but see Ikoyi et al, 2020). However, faunal responses to N addition are difficult to generalize, perhaps in part due to the types of N additions applied varying across studies (Table 3).…”

Section: Cropping System Effects On Soil Faunamentioning

confidence: 74%

Perennial grass bioenergy cropping systems: Impacts on soil fauna and implications for soil carbon accrual

et al. 2021

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Perennial grass energy crop production is necessary for the successful and sustainable expansion of bioenergy in North America. Numerous environmental advantages are associated with perennial grass cropping systems, including their potential to promote soil carbon accrual. Despite growing research interest in the abiotic and biotic factors driving soil carbon cycling within perennial grass cropping systems, soil fauna remain a critical yet largely unexplored component of these ecosystems. By regulating microbial activity and organic matter decomposition dynamics, soil fauna influence soil carbon stability with potentially significant implications for soil carbon accrual. We begin by reviewing the diverse, predominantly indirect effects of soil fauna on soil carbon dynamics in the context of perennial grass cropping systems. Since the impacts of perennial grass energy crop production on soil fauna will mediate their potential contributions to soil carbon accrual, we then discuss how perennial grass energy crop traits, diversity, and management influence soil fauna community structure and activity. We assert that continued research into the interactions of soil fauna, microbes, and organic matter will be important for advancing our understanding of soil carbon dynamics in perennial grass cropping systems. Furthermore, explicit consideration of soil faunal effects on soil carbon can improve our ability to predict changes in soil carbon following perennial grass cropping system establishment. We conclude by addressing the major knowledge gaps that should be prioritized to better understand and model the complex connections between perennial grass bioenergy systems, soil fauna, and carbon accrual.

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Section: Cropping System Effects On Soil Faunamentioning

confidence: 74%

Perennial grass bioenergy cropping systems: Impacts on soil fauna and implications for soil carbon accrual

et al. 2021

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“…For instance, nitrogen and phosphate fertilizers, especially urea or calcium superphosphate, are effective at suppressing the abundance of CCN or plant parasitic nematodes ( Al-Hazimi and Dacbah, 2014 ; Zhao et al, 2014 ; Song et al, 2015 ). Potassium sulfate promotes whereas ammonium sulfate alleviates the damage to plants caused by CCN ( Yang et al, 2008 ; Ikoyi et al, 2020 ), thus implicating potassium a plausible key factor promoting CCN’s abundance in fields ( Yang et al, 2008 ). In our study, the integrated shifts of soil properties in the OF treatment might have reduced the Pf/Pi of CCN, with soil nitrogen having the strongest effect (significant negative correlation with Pf/Pi) on suppressing CCN reproduction.…”

Section: Discussionmentioning

confidence: 99%

“…Specifically, adding urea or calcium superphosphate alone can significantly inhibit the abundance of CCN ( Yang et al, 2008 ; Al-Hazimi and Dacbah, 2014 ). Ammonium sulfate fertilizer was found to significantly limit the abundance of soil nematode communities ( Ikoyi et al, 2020 ), whereas potassium sulfate promoted the occurrence of CCN-associated disease in wheat plants ( Yang et al, 2008 ). Different fertilization types may change the main food sources of soil nematodes, thereby changing the community structure of soil nematodes ( Bjørnlund et al, 2006 ; Zhao et al, 2014 ).…”

Section: Introductionmentioning

confidence: 99%

Organic Fertilization Assembles Fungal Communities of Wheat Rhizosphere Soil and Suppresses the Population Growth of Heterodera avenae in the Field

Qiu

et al. 2020

Front. Plant Sci.

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Heterodera avenae (cereal cyst nematode, CCN) infects wheat and other cereal crops and causes severe losses in their yield. Research has shown that CCN infestations can be mitigated by organic fertilization in wheat fields, but the mechanisms underlying this phenomenon are still largely unknown. In this study, the relationships among CCN, soil properties, and soil fungal communities with organic fertilizer (OF) or chemical fertilizer (CF) and without fertilizer (CK), were investigated for two years in a wheat field in Henan province, China. Our results showed that the concentrations of soil total N, total P, available P, available K, and organic matter were all promoted by the OF treatment at the jointing stage of wheat, coinciding with the peak in egg hatching and penetration of wheat root by CCNs. Soil total N correlated positively (R 2 = 0.759, p < 0.05) with wheat yields but negatively (R 2 = 0.663, p < 0.01) with Pf/Pi (index of cyst nematode reproduction), implying the regulated soil property contributes to suppressing CCN in the OF treatment. Furthermore, fungal community α-diversity (Shannon and Simpson) and β-diversity (PCoA) of rhizosphere soil was improved under the organic fertilizer treatment. The fungal genera negatively associated with the Pf/Pi of CCN were highly enriched, which included Mortierella and Chaetomium , two taxa already reported as being nematophagous fungi in many other studies. These two genera were heavily surrounded by much more related fungal genera in the constructs co-occurrence network. These results suggested that the OF treatment shifted soil fungal community functioning towards the suppression of CCN. Taken together, the suppressed cyst nematode reproduction with the assembly of fungal communities in the rhizosphere led to greater wheat yields under organic fertilization. These findings provide an in-depth understanding of the benefits provided by organic fertilization for developing sustainable agriculture.

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“…The asfA gene was amplified with primers asfAF1all (Gahan & Schmalenberger, 2015) and asfBtoA The atsA gene was amplified using the AtsA-F1 AtsA-R1 primer pair (Ikoyi et al, 2020) (supplementary Table S1). PCR conditions were as follows: initial denaturation at 95 °C for 3 min, 40 cycles of 95 °C denaturation (60 s), 48 °C touchdown (60 s), and 72 °C extension (60 s).…”

Section: Diversity Of Asfa and Atsa Genementioning

confidence: 99%

The role of arbuscular mycorrhiza and organosulfur mobilizing bacteria in plant sulphur supply

Gahan

O’Sullivan

Cotter

et al. 2021

Preprint

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AM fungi are enhancing growth and health of many land plants but only some of these beneficial mechanisms are well understood. This study aimed to uncover the role of bacteria colonising AM fungi in organically-bound sulfur (S) mobilisation, the dominant S pools in soil that are not directly available to plants. The effect of an intact AM symbiosis with access to stable isotope organo-34S enriched soils encased in 35 micro-meter mesh cores was tested in microcosms with Agrostis stolonifera and Plantago lanceolata. At 3 month intervals, the plant shoots were analysed for 34S uptake. After 9 months, hyphae and associated soil was picked from static (mycorrhizal) and rotating (severed hyphae) mesh cores and corresponding rhizosphere soil was sampled for bacterial analysis. AM symbiosis increased uptake of 34S from organo-34S enriched soil at early stages of plant growth when S demand appeared to be high. The static (mycorrhizal) treatments were shown to harbour larger populations of cultivable heterotrophs and sulfonate mobilising bacteria. Microbial communities were significantly different in the hyphosphere of mycorrhizal hyphae and hyphae not associated to plant hosts. Sulfate ester (arylsulfatase enzyme assay, atsA gene) and sulfonate mobilising activity (asfA gene) was altered by an intact AM symbiotic partnership which stimulated the genera Azospirillum, Burkholderia and Polaromonas. Illumina sequencing revealed that AM symbiosis led to community shifts, reduced diversity and dominance of the Planctomycetes and Proteobacteria. This study demonstrated that AM symbioses can promote organo-S mobilization and plant uptake through interaction with hyphospheric bacteria.

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Sulfate fertilization supports growth of ryegrass in soil columns but changes microbial community structures and reduces abundances of nematodes and arbuscular mycorrhiza

Abstract: Sulfate fertilization supports growth of ryegrass in soil columns but changes microbial community structures and reduces abundances of nematodes and arbuscular mycorrhiza Article Type: Research Paper

Cited by 19 publications

References 48 publications

Perennial grass bioenergy cropping systems: Impacts on soil fauna and implications for soil carbon accrual

Perennial grass bioenergy cropping systems: Impacts on soil fauna and implications for soil carbon accrual

Organic Fertilization Assembles Fungal Communities of Wheat Rhizosphere Soil and Suppresses the Population Growth of Heterodera avenae in the Field

The role of arbuscular mycorrhiza and organosulfur mobilizing bacteria in plant sulphur supply

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