Soil Protists Can Actively Redistribute Beneficial Bacteria along Medicago truncatula Roots

Hawxhurst, Christopher J.; Micciulla, Jamie L; Bridges, Charles M.; Shor, Mikhael; Gage, Daniel J.; Shor, Leslie

doi:10.1128/aem.01819-22

Cited by 8 publications

(11 citation statements)

References 47 publications

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“…[9], Colpoda sp. [25]). A previous study on the diet of the black-necked cranes in Dashanbao revealed that cranes dig up the soil to find and consume underground food, such as roots or tubers [19].…”

Section: Discussionmentioning

confidence: 99%

Metabarcoding of protozoa and helminth in black-necked cranes: a high prevalence of parasites and free-living amoebae

Yu,

Li,

et al. 2024

Parasite

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Parasites and free-living amoebae (FLA) are common pathogens that pose threats to wildlife and humans. The black-necked crane (Grus nigricollis) is a near-threatened species and there is a shortage of research on its parasite diversity. Our study aimed to use noninvasive methods to detect intestinal parasites and pathogenic FLA in G. nigricollis using high-throughput sequencing (HTS) based on the 18S rDNA V9 region. A total of 38 fresh fecal samples were collected in Dashanbao, China, during the overwintering period (early-, middle I-, middle II-, and late-winter). Based on the 18S data, eight genera of parasites were identified, including three protozoan parasites: Eimeria sp. (92.1%) was the dominant parasite, followed by Tetratrichomonas sp. (36.8%) and Theileria sp. (2.6%). Five genera of helminths were found: Echinostoma sp. (100%), Posthodiplostomum sp. (50.0%), Euryhelmis sp. (26.3%), Eucoleus sp. (50.0%), and Halomonhystera sp. (2.6%). Additionally, eight genera of FLA were detected, including the known pathogens Acanthamoeba spp. (n = 13) and Allovahlkampfia spp. (n = 3). Specific PCRs were used to further identify the species of some parasites and FLA. Furthermore, the 18S data indicated significant changes in the relative abundance and genus diversity of the protozoan parasites and FLA among the four periods. These results underscore the importance of long-term monitoring of pathogens in black-necked cranes to protect this near-endangered species.

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Section: Discussionmentioning

confidence: 99%

Metabarcoding of protozoa and helminth in black-necked cranes: a high prevalence of parasites and free-living amoebae

Yu,

Li,

et al. 2024

Parasite

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“…While protists stimulate beneficial plant-microbe interactions and contribute important functions, e.g., nutrient cycling and pathogen removal they are major bacterial predators ( Gao et al, 2019 ; Bahroun et al, 2021 ; Guo et al, 2021 ; Hawxhurst et al, 2023 ). One predation defense mechanism used by bacteria involves LPs.…”

Section: Function and Applicationsmentioning

confidence: 99%

Does regulation hold the key to optimizing lipopeptide production in Pseudomonas for biotechnology?

Zhou,

Höfte,

Hennessy

2024

Front. Bioeng. Biotechnol.

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Lipopeptides (LPs) produced by Pseudomonas spp. are specialized metabolites with diverse structures and functions, including powerful biosurfactant and antimicrobial properties. Despite their enormous potential in environmental and industrial biotechnology, low yield and high production cost limit their practical use. While genome mining and functional genomics have identified a multitude of LP biosynthetic gene clusters, the regulatory mechanisms underlying their biosynthesis remain poorly understood. We propose that regulation holds the key to unlocking LP production in Pseudomonas for biotechnology. In this review, we summarize the structure and function of Pseudomonas-derived LPs and describe the molecular basis for their biosynthesis and regulation. We examine the global and specific regulator-driven mechanisms controlling LP synthesis including the influence of environmental signals. Understanding LP regulation is key to modulating production of these valuable compounds, both quantitatively and qualitatively, for industrial and environmental biotechnology.

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“…The advantage of microbiome predators as potential stimulators of crop growth compared with currently used BCA/BS in agricultural applications is their overarching top‐down control of the entire soil microbiome, rather than providing distinct functions (Asiloglu et al, 2020). This offers further strategies for application, such as co‐inoculation of microbiome predators with non‐prey plant‐beneficial microorganisms (Figure 2), as spatial and resource competition of beneficial microorganisms is reduced (Hawxhurst et al, 2023; Weidner et al, 2017). Indeed, soil microbiome predators might amplify the positive effects of BCA/BS organisms, such as Trichoderma and Bacillus species (Guo et al, 2022; Mawarda et al, 2022; Xiong et al, 2020), by increasing their dominance and activity in the microbiome (Muller et al, 2013), or by phoresy of biocontrol agents by microbiome predators towards host roots (Hawxhurst et al, 2023).…”

Section: Are Microbiome Predators Applicable Such As In Agriculture A...mentioning

confidence: 99%

“…This offers further strategies for application, such as co‐inoculation of microbiome predators with non‐prey plant‐beneficial microorganisms (Figure 2), as spatial and resource competition of beneficial microorganisms is reduced (Hawxhurst et al, 2023; Weidner et al, 2017). Indeed, soil microbiome predators might amplify the positive effects of BCA/BS organisms, such as Trichoderma and Bacillus species (Guo et al, 2022; Mawarda et al, 2022; Xiong et al, 2020), by increasing their dominance and activity in the microbiome (Muller et al, 2013), or by phoresy of biocontrol agents by microbiome predators towards host roots (Hawxhurst et al, 2023). Using microbiome predators in synthetic communities with other microorganisms might therefore represent a boost to already existing BCA and BS products.…”

Section: Are Microbiome Predators Applicable Such As In Agriculture A...mentioning

confidence: 99%

Microbiome predators in changing soils

Hu,

Li,

Berlinches de Gea

et al. 2023

Environmental Microbiology

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Microbiome predators shape the soil microbiome and thereby soil functions. However, this knowledge has been obtained from small‐scale observations in fundamental rather than applied settings and has focused on a few species under ambient conditions. Therefore, there are several unaddressed questions on soil microbiome predators: (1) What is the role of microbiome predators in soil functioning? (2) How does global change affect microbiome predators and their functions? (3) How can microbiome predators be applied in agriculture? We show that there is sufficient evidence for the vital role of microbiome predators in soils and stress that global changes impact their functions, something that urgently needs to be addressed to better understand soil functioning as a whole. We are convinced that there is a potential for the application of microbiome predators in agricultural settings, as they may help to sustainably increase plant growth. Therefore, we plea for more applied research on microbiome predators.

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Soil Protists Can Actively Redistribute Beneficial Bacteria along Medicago truncatula Roots

Abstract: Soil protists are an important part of the microbial community in the rhizosphere. Plants grown with protists fare better than plants grown without protists.

Cited by 8 publications

References 47 publications

Metabarcoding of protozoa and helminth in black-necked cranes: a high prevalence of parasites and free-living amoebae

Metabarcoding of protozoa and helminth in black-necked cranes: a high prevalence of parasites and free-living amoebae

Does regulation hold the key to optimizing lipopeptide production in Pseudomonas for biotechnology?

Microbiome predators in changing soils

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