Diversity and co-occurrence network modularization of bacterial communities determine soil fertility and crop yields in arid fertigation agroecosystems

Ye, Zhencheng; Li, Jing; Wang, Jie; Zhang, Chao; Liu, Guobin; Dong, Qianli

doi:10.1007/s00374-021-01571-3

Cited by 59 publications

(25 citation statements)

References 56 publications

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“…The introduced microbes may have worked as core microbes that allowed both negative and positive microbial interactions being established in soil, which formed distinct patterns from those in control. Such findings suggest that SynCom treatments significantly affected microbial co‐occurrence in soil, with potential implications for the microbial interactions in soil and plant disease tolerance 70 . Interestingly, a few dominant Massilia spp.…”

Section: Discussionmentioning

confidence: 88%

Effective colonisation by a bacterial synthetic community promotes plant growth and alters soil microbial community

Liu

Qiu

et al. 2021

J of Sust Agri & Env

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Introduction Plant‐associated microorganisms are widely explored for their use as bioinoculants in agriculture. However, the rate and ability of introduced microbes to colonise and interact with indigenous soil microbiomes are largely unknown. Materials & Methods In this study, we constructed a bacterial synthetic community (SynCom) using eight plant‐growth‐promoting bacteria isolated from the wheat (Triticum aestivum) rhizosphere, including three Bacillus spp., two Acinebacter spp., an Enterobacter sp., a Xanthomonas sp. and a Burkholderia sp., which all showed multiple plant growth‐promoting effects including indole‐3‐acetic acid and ammonia production and fungal pathogen suppression. We inoculated this SynCom in a soil with reduced microbial diversity, and investigated the ability of the SynCom to colonise wheat plants, and interact with soil microbes in the presence or absence of a soil‐borne pathogen Fusarium pseudograminearum (Fp). Results We found that SynCom significantly increased the wheat plant growth, root development and biomass production. Fp load in soil was significantly reduced and plant survival rates increased following the SynCom inoculation. Soil microbial community structure was altered by the SynCom, and noticeably, relative abundance of Pseudomonas spp. was induced in the soil. Conclusion This study provides novel evidence that colonisation of a beneficial SynCom promotes plant growth and alters soil microbial community.

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Section: Discussionmentioning

confidence: 88%

Effective colonisation by a bacterial synthetic community promotes plant growth and alters soil microbial community

Liu

Qiu

et al. 2021

J of Sust Agri & Env

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“…Soil biodiversity is an indicator of soil health, and the H was positively correlated with soil nutrients, suggesting that soil nematode diversity could be associated with soil nutrient cycling. There is speculation that the decomposition of wood litter may be more associated with diversity than the abundance of soil epigeic fauna [54], and some studies have proven that soil biodiversity is very important for maintaining soil fertility [55]. The relationship between food web indices (EI, SI, and CI) and soil properties indicates that higher nutritionrich soil increases the available soil resources of soil nematodes and promotes the structure and trophic links of the soil food web, thereby resulting in a more bacterial-dominated decomposition pathway.…”

Section: Factors Controlling the Nematode Community Structurementioning

confidence: 99%

Response of Soil Nematode Community Structure and Function to Monocultures of Pumpkin and Melon

Zhao

Wang

Ling

et al. 2022

Life

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It is well known that crop monoculture can induce negative effects on soil ecosystems and crop productivity. However, little is known about how vegetable monoculture affects the soil nematode community structure and its relationship with vegetable yields. In this study, the composition, abundance, metabolic footprint, and ecological indices of soil nematodes are investigated in monocultures of pumpkin and melon. The relationships between nematode community structure and yields of pumpkin and melon were analyzed by linear regression. Both monoculture soils of pumpkin and melon suppressed the relative abundance of bacterivores but increased the relative abundance of plant parasites. Pumpkin monoculture soils decreased soil nematode diversity but increased the maturity index of plant parasites. Monoculture soils of pumpkin and melon decreased the metabolic footprint of lower- and higher-level trophic groups of the soil food web, respectively. Pumpkin and melon monoculture soils increased the food web indices channel index (CI) but decreased the enrichment index (EI) and the structure index (SI). The monoculture soils of pumpkin and melon led to a more fungal-dominated decomposition pathway and degraded soil food web conditions. The abundance of bacterivores and food web indices EI and SI were positively correlated with soil nutrients and pH, while the abundance of plant parasites and CI were negatively correlated with soil nutrients and pH. Paratylenchus was negatively correlated with pumpkin and melon yields and could be the potential plant parasites threatening pumpkin and melon productions. Redundancy analysis showed that monocultures of pumpkin and melon altered the soil nematode community via soil properties; total N, total P, alkeline-N, and pH were the main driving factors.

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“…Soil biogeochemical processes, including C, N, P and S cycling, can be directly and indirectly modulated by microbial taxa (Fierer, 2017), often in a diversity‐dependent manner (Wagg et al, 2019; Wagg et al, 2021). The higher soil multinutrient cycling index in the MI + LF treatment than the MI + HF treatment also suggested that, in addition to fertilization, there were other factors that affected soil nutrients, such as soil micro‐organisms (Ye et al, 2021). In the present study, we found that the noncore taxa contributed more to soil multinutrient cycling than the core taxa in the arid agricultural ecosystem, which may be related to their distinct life‐history strategies.…”

Section: Discussionmentioning

confidence: 99%

“…Human activity, especially irrigation and fertilization, has a significant impact on microbial diversity in agricultural soils (Ye et al, 2021). In this study, we observed that the fertigation measures caused significant changes in the α-diversity of noncore microbiota but had no significant impact on that of the core microbiota, indicating that the core taxa had potential higher resilience or resistance to external disturbance, and the noncore taxa, whose abundance was relatively low (<0.05%), were more easily affected by changes in the external environment in the arid agricultural ecosystem.…”

Section: Discussionmentioning

confidence: 99%

Different roles of core and noncore bacterial taxa in maintaining soil multinutrient cycling and microbial network stability in arid fertigation agroecosystems

Wang

et al. 2022

Journal of Applied Ecology

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Microbes play an essential role in soil biogeochemical processes and maintenance of soil nutrients, but not all microbial taxa contribute equally, and their functions in soil nutrient cycling and microbial network stability are unclear in arid fertigation agricultural ecosystems. In this study, a 4‐year field experiment was conducted in an irrigation district in China using three levels of irrigation [high (400 mm), medium (300 mm) and low (200 mm)] and two levels of fertilization [high (600 kg/ha P2O5 + 300 kg/ha urea) and low (300 kg/ha P2O5 + 150 kg/ha urea)] to reveal the ecological roles of core and noncore taxa in maintaining soil nutrient cycling and their associations with microbial network stability. Our results showed that combining medium irrigation with low fertilization resulted in higher levels of soil organic C, inorganic N, available P, multinutrient cycling and noncore bacterial diversity compared with the other treatments. Soils supporting a higher diversity of noncore bacterial taxa had a high soil multinutrient cycling index, while soils harbouring highly diverse core taxa exhibited a more stable bacterial network. The soil multinutrient cycling index was also significantly positively related to the subnetwork modularity of noncore taxa. Moreover, noncore taxa could serve as diverse pools that turn into core taxa in response to changes in the external environment. Acinetobacter, Flavobacterium, Gemmatimonas and Salinimicrobium, which belong to the noncore taxa, were involved in soil C and N cycling in the arid agricultural ecosystem. Synthesis and applications. Our results suggest that soil microbiota contribute differently to ecosystem functions. Changes in soil nutrient cycling were more closely related to variations in noncore taxa, while bacterial network stability was more associated with core taxa. Our study emphasized the role of noncore microbiota, which has been neglected in previous studies. Furthermore, our findings suggested that combining medium irrigation with low fertilization is effective for enhancing soil nutrients and bacterial diversity, providing guidance for managing arid agricultural ecosystems.

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Diversity and co-occurrence network modularization of bacterial communities determine soil fertility and crop yields in arid fertigation agroecosystems

Cited by 59 publications

References 56 publications

Effective colonisation by a bacterial synthetic community promotes plant growth and alters soil microbial community

Effective colonisation by a bacterial synthetic community promotes plant growth and alters soil microbial community

Response of Soil Nematode Community Structure and Function to Monocultures of Pumpkin and Melon

Different roles of core and noncore bacterial taxa in maintaining soil multinutrient cycling and microbial network stability in arid fertigation agroecosystems

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