Brassica seed meal fumigation restores beneficial bacterial communities by enriching taxa with high resistance and resilience

Peng, Junwei; Shen, Minchong; Chen, Ruihuan; Liu, Hong; Sun, Yang; Liu, Qin; Dong, Yuanhua; Li, Jiangang

doi:10.1007/s11104-022-05855-x

Cited by 2 publications

(1 citation statement)

References 91 publications

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“…These studies have mostly observed transient increases in soil available P content after soil chemical fumigation (Chen et al, 2020;Du et al, 2024;Huo et al, 2024). However, depending on the environmental conditions, crop type (Peng et al, 2022) and sampling time (Cheng et al, 2020), some studies have reported that chemical fumigants had decreased or had no significant effect on soil P availability.…”

Section: Soil Phosphorus Cyclingmentioning

confidence: 99%

Soil chemical fumigation alters soil phosphorus cycling: effects and potential mechanisms

Wang,

Tang

2024

Front. Plant Sci.

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Soil chemical fumigation is an effective and popular method to increase agricultural productivity. However, the broad-spectrum bioactivity of fumigants causes harm to soil beneficial microorganisms involved in the soil phosphorous cycle, such as soil phosphorus solubilizing microorganisms (PSMs). We review the effects of soil chemical fumigation on soil phosphorus cycling, and the potential underlying mechanisms that ultimately lead to altered phosphorus availability for crops. These complex processes involve the highly diverse PSM community and a plethora of soil phosphorus forms. We discuss phosphatizing amendments aimed at counteracting the possible negative effects of fumigation on phosphorus availability, phosphorus use efficiency, and crop yields. We also emphasize distinguishing between the effects on soil phosphorus cycling caused by the chemical fumigants, and those caused by the fumigation process (e.g. plastic mulching). These are typically conflated in the literature; distinguishing them is critical for identifying appropriate amendments to remediate possible post-fumigation soil phosphorus deficiencies.

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Section: Soil Phosphorus Cyclingmentioning

confidence: 99%

Soil chemical fumigation alters soil phosphorus cycling: effects and potential mechanisms

Wang,

Tang

2024

Front. Plant Sci.

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Changes in the soil and rhizosphere microbiomes associated with bacterial wilt decline in the tomato monoculture field

Peng,

Hou,

Liu

et al. 2024

Preprint

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Background Monoculture farming increases the efficiency of planting and harvesting, but at the same time, exacerbates the severity of soilborne diseases. Disease-suppressive soils are an effective and sustainable resource for managing soilborne diseases in monoculture systems. However, the abiotic and biotic factors contributing to the emergence and function of specific suppressiveness remain elusive, limiting the broader acceptance of suppressive soil in agriculture. Here, we investigated changes in the belowground tomato microbiome during long-term monoculture leading to an outbreak and subsequent suppression of bacterial wilt. We also conducted greenhouse experiments to examine the differences in rhizosphere community and plant performance between disease-suppressive soil and disease-conductive soil. Moreover, we used metagenomics to assess the functional profiles of rhizosphere communities in response to suppressive soil. Results In our long-term tomato monoculture system, wilt incidence steadily increased, culminating in the most severe outbreak in the fifth cropping cycle. Surprisingly, in the seventh crop, wilt symptoms spontaneously declined, signifying a transition toward the disease-suppressive state. Greenhouse disease assays confirmed that the suppressive soil had significantly lower wilt incidence, compared to its disease-conductive counterpart. Drenching tomato seedlings planted in infested soil with rhizosphere soil suspensions from disease-suppressive plots significantly improved the plant growth and physiological characteristics compared to seedlings treated with a conducive soil suspension. The monocropping and disease reduction were associated with shifts in the diversity and abundance of multiple bacteria associated with plant roots, including an enrichment of Bacillus, Pseudomonas, and Streptomyces. Isolates of Pseudomonas and Bacillus from plants growing in suppressive soil antagonized R. solanacearum and significantly decreased the incidence of bacterial wilt in greenhouse trials. Another important change that accompanied the transition towards the disease-suppressive state involved the enrichment of Streptomyces and trace elements (Mn, Ni) in bulk soil. Functional analysis of the suppressive soil metagenome revealed enrichment of genes for the synthesis of antibiotics, polysaccharides, nitrogen metabolism, mineral absorption, and energy production. Conclusions This study is among the first to directly demonstrate that long-term tomato monoculture can induce specific soil suppressiveness against Ralstonia wilt, while also revealing the key changes in soil and rhizosphere microbiomes and their function associated with this phenomenon.

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Brassica seed meal fumigation restores beneficial bacterial communities by enriching taxa with high resistance and resilience

Cited by 2 publications

References 91 publications

Soil chemical fumigation alters soil phosphorus cycling: effects and potential mechanisms

Soil chemical fumigation alters soil phosphorus cycling: effects and potential mechanisms

Changes in the soil and rhizosphere microbiomes associated with bacterial wilt decline in the tomato monoculture field

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