Fungal community composition in soils subjected to long‐term chemical fertilization is most influenced by the type of organic matter

Sun, Run‐Cang; Dsouza, Melissa; Gilbert, Jack A.; Guo, Xisheng; Wang, Daozhong; Guo, Zhaoxin; Ni, Yingying; Chu, Haiyan

doi:10.1111/1462-2920.13512

Cited by 197 publications

(115 citation statements)

References 110 publications

Supporting

Mentioning

100

Contrasting

Order By: Relevance

“…Management practices and sites had a strong influence on soil chemical properties, which, in turn, affected bacterial and fungal community composition. Forward selection revealed that the two kingdoms responded to different sets of soil physicochemical parameters, namely, bacterial community composition was affected by Ca and Mg, while fungal community composition was affected by Ca, Na, and K. These predictors are notably different from variables commonly accepted as important for microbial community composition, such as organic matter (46,47), pH (48,49), and N. The failure of organic matter and N to predict microbial community structure is surprising at first glance, given that scarce C and N availability can limit rates of microbial growth and functions such as mineralization and that the abundance of N-cycling microbial taxa often varies with C and inorganic N species. However, this result is consistent with multiple studies showing no effect of N on microbial community composition (50)(51)(52).…”

Section: Discussionmentioning

confidence: 99%

Effects of Agricultural Management on Rhizosphere Microbial Structure and Function in Processing Tomato Plants

Schmidt

Vannette

Igwe

et al. 2019

Appl Environ Microbiol

View full text Add to dashboard Cite

Agricultural management practices affect bulk soil microbial communities and the functions they carry out, but it remains unclear how these effects extend to the rhizosphere in different agroecosystem contexts. Given close linkages between rhizosphere processes and plant nutrition and productivity, understanding how management practices impact this critical zone is of great importance to optimize plant-soil interactions for agricultural sustainability. A comparison of six paired conventional-organic processing tomato farms was conducted to investigate relationships between management, soil physicochemical parameters, and rhizosphere microbial community composition and functions. Organically managed fields were higher in soil total N and NO 3 -N, total and labile C, plant Ca, S, and Cu, and other essential nutrients, while soil pH was higher in conventionally managed fields. Differential abundance, indicator species, and random forest analyses of rhizosphere communities revealed compositional differences between organic and conventional systems and identified management-specific microbial taxa. Phylogeny-based trait prediction showed that these differences translated into more abundant pathogenesis-related gene functions in conventional systems. Structural equation modeling revealed a greater effect of soil biological communities than physicochemical parameters on plant outcomes. These results highlight the importance of rhizosphere-specific studies, as plant selection likely interacts with management in regulating microbial communities and functions that impact agricultural productivity. IMPORTANCE Agriculture relies, in part, on close linkages between plants and the microorganisms that live in association with plant roots. These rhizosphere bacteria and fungi are distinct from microbial communities found in the rest of the soil and are even more important to plant nutrient uptake and health. Evidence from field studies shows that agricultural management practices such as fertilization and tillage shape microbial communities in bulk soil, but little is known about how these practices affect the rhizosphere. We investigated how agricultural management affects plant-soil-microbe interactions by comparing soil physical and chemical properties, plant nutrients, and rhizosphere microbial communities from paired fields under organic and conventional management. Our results show that human management effects extend even to microorganisms living in close association with plant roots and highlight the importance of these bacteria and fungi to crop nutrition and productivity.

show abstract

Section: Discussionmentioning

confidence: 99%

Effects of Agricultural Management on Rhizosphere Microbial Structure and Function in Processing Tomato Plants

Schmidt

Vannette

Igwe

et al. 2019

Appl Environ Microbiol

View full text Add to dashboard Cite

show abstract

“…This could be because fungi are heterotrophs and, compared with bacteria and archaea, are more dependent on the carbon source provided by plants. The profound effects of organic resources on the fungal community have also been demonstrated in agricultural (43,44) and forest (45) soils.…”

Section: Discussionmentioning

confidence: 94%

Long-Term Phytoremediation of Coastal Saline Soil Reveals Plant Species-Specific Patterns of Microbial Community Recruitment

et al. 2020

Self Cite

View full text Add to dashboard Cite

Soil salinization is one of the major land degradation processes that decreases soil fertility and crop production worldwide. In this study, a long-term coastal saline soil remediation experiment was conducted with three salt-tolerant plant species: Lycium chinense Mill. (LCM), Tamarix chinensis Lour. (TCL), and Gossypium hirsutum Linn. (GHL). The three plant species successfully remediated the saline soil but showed different efficacies. The archaeal, bacterial, and fungal communities in barren soil and in four rhizocompartments (distal-rhizosphere soil, proximal-rhizosphere soil, rhizoplane, and endosphere) of the three plant species were assessed. All three plant species significantly decreased the richness of the archaeal communities but increased that of the bacterial and fungal communities in both the rhizosphere and rhizoplane compared with those in the barren soil. The archaeal and bacterial community structures were strongly influenced by the rhizocompartment, while specific fungal communities were recruited by different plant species. The microbial taxa whose abundance either increased or decreased significantly during remediation were identified. Soil electrical conductivity (EC) was identified as the main factor driving the variation in microbial community composition between the remediated and barren soil, and total nitrogen (TN), total carbon (TC), and available potassium (AK) were the main factors driving the differences among plant species. This report provides new insights into the responses of the root zone microbial communities of different salt-tolerant plant species during phytoremediation. IMPORTANCE Despite knowing that phytoremediation by salt-tolerant plants is an effective technology for ameliorating saline soils and that microorganisms contribute significantly to plant stress tolerance and soil fertility, we still lack a comprehensive understanding of how microbes respond to the growth of salt-tolerant plants and the subsequent decline in soil salinity. The results of this study revealed different response patterns among bacterial, archaeal, and fungal communities and indicated that the decline in archaeal abundance might be a sign of successful remediation of coastal saline soils. The recruitment of specific fungal communities by different plant species indicated the importance of fungi in plant species-specific remediation functions. We also identified the taxa that may play key roles during remediation, and these taxa could potentially be used as indicators of phytoremediation. Overall, these findings highlight the importance of microbes in the phytoremediation of saline soil and suggest that the mechanisms involved are plant species specific.

show abstract

“…The indicator species of bacterial OTUs are used to assess the efficacy of chiral ethiprole in agricultural management (Hartmann, Frey, Mayer, Mader, & Widmer, 2015;Siddig, Ellison, Ochs, Villar, & Lau, 2016;Sun et al, 2016). Indicator species (OTUs) for the bacteria present in soils amended with different chiral enantiomers are shown in (Table S4).…”

Section: Indicator Species By the Treatment Of Chiral Ethiprolementioning

confidence: 99%

Enantioselectivity in degradation and ecological risk of the chiral pesticide ethiprole

et al. 2018

View full text Add to dashboard Cite

Intensive agricultural activities have caused land degradation due to soil pollution, particularly by pesticides. However, the degradation, metabolism, and toxicity of chiral pesticides by soil microorganisms are often enantioselective. This study aimed to determine the effect of chirality on the degradation of the enantiomers of ethiprole in soil and their impact on soil microbial communities. (R)‐ethiprole underwent directional chiral conversion to the (S)‐enantiomer in a paddy soil microcosm, leading to elevated concentrations of (S)‐ethiprole. Initially, the bacterial operational taxonomic units significantly decreased after 3 days of incubation with rac‐ethiprole, (R)‐ethiprole, and (S)‐ethiprole but gradually increased in the later stage. Principal coordinate analysis revealed that the bacterial community structure was enantioselectively affected by the ethiprole enantiomers. Within 3 days, both rac‐ethiprole and (R)‐ethiprole reshaped the original stochastic microbial community into a deterministic community (variable selection). Thus, we propose that the enantioselective behavior and ecotoxicology of chiral pesticides need to be considered, especially because there are numerous chiral pesticides currently in use within agricultural management. The comprehensive understanding of the ecological risk of chiral pesticide enantiomers is vital to the process of improving sustainable production and environmental health in agricultural ecosystems.

show abstract

Fungal community composition in soils subjected to long‐term chemical fertilization is most influenced by the type of organic matter

Cited by 197 publications

References 110 publications

Effects of Agricultural Management on Rhizosphere Microbial Structure and Function in Processing Tomato Plants

Effects of Agricultural Management on Rhizosphere Microbial Structure and Function in Processing Tomato Plants

Long-Term Phytoremediation of Coastal Saline Soil Reveals Plant Species-Specific Patterns of Microbial Community Recruitment

Enantioselectivity in degradation and ecological risk of the chiral pesticide ethiprole

Contact Info

Product

Resources

About