Changes in soil microbial diversity and community composition across bahiagrass and rhizoma peanut pastures

Erhunmwunse, Adesuwa S.; Queiroz, Luana M. D.; Zhang, Kaile; Mackowiak, Cheryl L.; Blount, Ann R.; Júnior, José Carlos Batista Dubeux; Liao, Hui‐Ling

doi:10.1007/s00374-023-01701-z

Cited by 2 publications

(5 citation statements)

References 91 publications

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“…Interestingly, the bacterial community shifted from being dominated by Proteobacteria, as reported in other RP studies [10][11][12]44], to Firmicutes in our study. Reasons for the shift are not well understood, but Firmicutes have been reported in older, stable agroecosystems [45].…”

Section: Soil Bacterial Diversity and Community Responsesupporting

confidence: 87%

“…Likewise, desirable soil microbial associations with RP have also been observed [9][10][11][12]. For example, the presence of RP in bahiagrass systems was associated with increases in soil microbial diversity and the relative abundance of soil microbes with potential N 2 -fixing and cycling abilities, such as Bradyrhizobium and members of the Allorhizobium-Neorhizobium-Pararhizobium-Rhizobium clade [10,11]. Plants influence soil microbial communities mainly through rhizodeposition and plant litter accumulation [13].…”

Section: Introductionmentioning

confidence: 99%

“…Many microbial studies on RP have targeted the upper 10 to 15 cm soil depth [9][10][11][12]. The surface soil likely harbors greater microbial density because of greater root densities and plant litter accumulation, which also results in greater soil carbon [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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Soil Bacterial Diversity Responds to Long-Term Establishment of Perennial Legumes in Warm-Season Grassland at Two Soil Depths

Erhunmwunse,

Guerra,

Liu

et al. 2023

Microorganisms

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The introduction of rhizoma peanut (RP Arachis glabrata Benth) into bahiagrass (Paspalum notatum Flüggé) may require time to develop stable plant–soil microbe interactions as the microbial legacy of the previous plant community may be long-lasting. A previous study showed that <2 years of introducing rhizoma peanut into bahiagrass pastures minimally affected soil bacterial diversity and community composition. In this study, we compared the effects of the long-term inclusion of rhizoma peanut (>8 years) into bahiagrass on soil bacterial diversity and community composition against their monocultures at 0 to 15 and 15 to 30 cm soil depths using next-generation sequencing to target bacterial 16S V3–V4 regions. We observed that a well-established RP–bahiagrass mixed stand led to a 36% increase in bacterial alpha diversity compared to the bahiagrass monoculture. There was a shift from a soil bacterial community dominated by Proteobacteria (~26%) reported in other bahiagrass and rhizoma peanut studies to a soil bacterial community dominated by Firmicutes (39%) in our study. The relative abundance of the bacterial genus Crossiella, known for its antimicrobial traits, was enhanced in the presence of RP. Differences in soil bacterial diversity and community composition were substantial between 0 to 15 and 15 to 30 cm soil layers, with N2-fixing bacteria belonging to the phylum Proteobacteria concentrated in 0 to 15 cm. Introducing RP into bahiagrass pastures is a highly sustainable alternative to mineral N fertilizer inputs. Our results provide evidence that this system also promotes greater soil microbial diversity and is associated with unique taxa that require further study to better understand their contributions to healthy pastures.

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Section: Soil Bacterial Diversity and Community Responsesupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

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Soil Bacterial Diversity Responds to Long-Term Establishment of Perennial Legumes in Warm-Season Grassland at Two Soil Depths

Erhunmwunse,

Guerra,

Liu

et al. 2023

Microorganisms

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“…Consistent with our study, Erhunmwunse et al [ 60 ] identified Ascomycota, Mortierellomycota, and Basidiomycota as predominant phyla within RP systems in Florida. At the genus level, our study found that some fungal genera such as Neocosmospora and Epicoccum were dominant across all RP cultivars, suggesting their potential as key fungal indicators for RP irrespective of cultivar type.…”

Section: Discussionsupporting

confidence: 92%

“…Neocosmospora , (previously known as Fusarium solani species complex), was the most abundant fungal genus, representing 21% of the fungal genera across all RP cultivars. This aligns with the findings of Erhunmwunse et al [ 60 ] who, within the same soil type and location, reported Fusarium (Nectriaceae) as the primary fungal genus within Ecoturf and Florigraze RP soils. This shows the importance of this fungal genus within RP systems, warranting further investigation into their ecological roles and implications for RP management strategies.…”

Section: Discussionsupporting

confidence: 91%

Soil fungal community structure and function response to rhizoma perennial peanut cultivars

Daraz,

Erhunmwunse,

Dubeux

et al. 2024

BMC Plant Biol

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Background Crop-associated microorganisms play a crucial role in soil nutrient cycling, and crop growth, and health. Fine-scale patterns in soil microbial community diversity and composition are commonly regulated by plant species or genotype. Despite extensive reports in different crop or its cultivar effects on the microbial community, it is uncertain how rhizoma peanut (RP, Arachis glabrata Benth.), a perennial warm-season legume forage that is well-adapted in the southern USA, affects soil microbial community across different cultivars. Results This study explored the influence of seven different RP cultivars on the taxonomic composition, diversity, and functional groups of soil fungal communities through a field trial in Marianna, Florida, Southern USA, using next-generation sequencing technique. Our results showed that the taxonomic diversity and composition of the fungal community differed significantly across RP cultivars. Alpha diversity (Shannon, Simpson, and Pielou’s evenness) was significantly higher in Ecoturf but lower in UF_Peace and Florigraze compared to other cultivars (p < 0.001). Phylogenetic diversity (Faith’s PD) was lowest in Latitude compared to other cultivars (p < 0.0001). The dominant phyla were Ascomycota (13.34%), Mortierellomycota (3.82%), and Basidiomycota (2.99%), which were significantly greater in Florigraze, UF_Peace, and Ecoturf, respectively. The relative abundance of Neocosmospora was markedly high (21.45%) in UF_Tito and showed large variations across cultivars. The relative abundance of the dominant genera was significantly greater in Arbrook than in other cultivars. There were also significant differences in the co-occurrence network, showing different keystone taxa and more positive correlations than the negative correlations across cultivars. FUNGuild analysis showed that the relative abundance of functional guilds including pathogenic, saprotrophic, endophytic, mycorrhizal and parasitic fungi significantly differed among cultivars. Ecoturf had the greatest relative abundance of mycorrhizal fungal group (5.10 ± 0.44), whereas UF_Peace had the greatest relative abundance of endophytic (4.52 ± 0.56) and parasitic fungi (1.67 ± 0.30) compared to other cultivars. Conclusions Our findings provide evidence of crop cultivar’s effect in shaping fine-scale fungal community patterns in legume-based forage systems. Graphical abstract

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Changes in soil microbial diversity and community composition across bahiagrass and rhizoma peanut pastures

Cited by 2 publications

References 91 publications

Soil Bacterial Diversity Responds to Long-Term Establishment of Perennial Legumes in Warm-Season Grassland at Two Soil Depths

Soil Bacterial Diversity Responds to Long-Term Establishment of Perennial Legumes in Warm-Season Grassland at Two Soil Depths

Soil fungal community structure and function response to rhizoma perennial peanut cultivars

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