Plant-growth-promoting Caulobacter strains isolated from distinct plant hosts share conserved genetic factors involved in beneficial plant–bacteria interactions

Berrios, Louis

doi:10.1007/s00203-021-02702-y

Cited by 10 publications

(5 citation statements)

References 35 publications

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“…Based on literature review, enriched ASVs in different groups were categorized as PGPR at the genus level [ 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 , 88 , 89 , 90 , 91 , 92 , 93 , 94 , 95 , 96 , 97 , 98 , 99 , 100 , 101 , 102 , 103 , 104 , 105 , 106 , 107 , 108 , 109 ,…”

Section: Resultsmentioning

confidence: 99%

Exploring the Impact of Coconut Peat and Vermiculite on the Rhizosphere Microbiome of Pre-Basic Seed Potatoes under Soilless Cultivation Conditions

Yan,

Ma,

Bao

et al. 2024

Microorganisms

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Soilless cultivation of potatoes often utilizes organic coconut peat and inorganic vermiculite as growing substrates. The unique microbial communities and physicochemical characteristics inherent to each substrate significantly influence the microecological environment crucial for potato growth and breeding. This study analyzed environmental factors within each substrate and employed Illumina sequencing alongside bioinformatics tools to examine microbial community structures, their correlation with environmental factors, core microbial functions, and the dynamics of microbial networks across various samples. These included pure coconut peat (CP1) and pure vermiculite (V1), substrates mixed with organic fertilizer for three days (CP2 and V2), and three combinations cultivated with potatoes for 50 days (CP3, V3, and CV3—a 1:1 mix of coconut peat and vermiculite with organic fertilizer). Vermiculite naturally hosts a more diverse microbial community. After mixing with fertilizer and composting for 3 days, and 50 days of potato cultivation, fungal diversity decreased in both substrates. Coconut peat maintains higher bacterial diversity and richness compared to vermiculite, harboring more beneficial bacteria and fungi, resulting in a more complex microbial network. However, vermiculite shows lower bacterial diversity and richness, with an accumulation of pathogenic microorganisms. Among the 11 environmental factors tested, water-soluble nitrogen (WSN), total nitrogen (TN), available potassium (AK), total organic carbon (TOC) and air-filled porosity (AFP) were significantly associated with microbial succession in the substrate.The nutritional type composition and interaction patterns of indigenous microorganisms differ between vermiculite and coconut peat. Adding abundant nutrients significantly affects the stability and interaction of the entire microbial community, even post-potato cultivation. When using vermiculite for soilless cultivation, precise control and adjustment of nutrient addition quantity and frequency are essential.

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Section: Resultsmentioning

confidence: 99%

Exploring the Impact of Coconut Peat and Vermiculite on the Rhizosphere Microbiome of Pre-Basic Seed Potatoes under Soilless Cultivation Conditions

Yan,

Ma,

Bao

et al. 2024

Microorganisms

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“…This study identified additional families likely benefiting from T3SS and T6SS, such as Oxalobacteraceae, Comamonadaceae and Caulobacteraceae . Various genera in these families are considered beneficial microbes (Wen et al ., 2020, Berrios, 2021, Yu et al ., 2021) and could be good candidates for the development of plant growth-promoting microbes or biocontrol agents.…”

Section: Discussionmentioning

confidence: 99%

Bacterial family-specific enrichment and functions of secretion systems in the rhizosphere

Fourie,

Lopez,

Sánchez-Gil

et al. 2024

Preprint

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The plant rhizosphere is a highly selective environment where bacteria have developed traits to establish themselves or outcompete other microbes. These traits include bacterial secretion systems (SSs) that range from Type I (T1SS) to Type IX (T9SS) and can play diverse roles. The best known functions are to secrete various proteins or other compounds into the extracellular space or into neighbouring cells, including toxins to attack other microbes or effectors to suppress plant host immune responses. Here, we aimed to determine which bacterial SS's were associated with the plant rhizosphere. We utilised paired metagenomic datasets of rhizosphere and bulk soil samples from five different plant species grown in a wide variety of soil types, amounting to ten different studies. The T3SS and T6SS were generally enriched in the rhizosphere, as observed in studies of individual plant-associated genera. We also identified additional SS's that have received less attention thus far, such as the T2SS, T5SS and Bacteroidetes-specific T6SSiii and T9SS. The predicted secreted proteins of some of these systems (T3SS, T5SS and T6SS) could be linked to functions such as toxin secretion, adhesion to the host and facilitation of plant-host interactions (such as root penetration). The most prominent bacterial taxa with rhizosphere- or soil-enriched SS's included Xanthomonadaceae, Oxalobacteraceae, Comamonadaceae, Caulobacteraceae, and Chitinophagaceae, broadening the scope of known plant-associated taxa that use these systems. We anticipate that the SSs and taxa identified in this study may be utilised for the optimisation of bioinoculants to improve plant productivity.

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“…This suggests that B. frigoritolerans ZB201705 might be used as an inoculant in order to increase crop yield also under abiotic stresses. Moreover, Berrios [ 29 ] presented the genome of a PGPB, Caulobacter segnis CBR1, and contextualized its genomic features with the genomic features of sequenced Caulobacter strains demonstrating that the CBR1 genome harbors genomic features that are responsible for Caulobacter strains to enhance the growth and development of Arabidopsis plants. Duan et al [ 30 ] elaborated the genome sequence of Pseudomonas sp.…”

Section: Techniques To Study Plant-pgpb Interactionsmentioning

confidence: 99%

Current Techniques to Study Beneficial Plant-Microbe Interactions

2022

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Many different experimental approaches have been applied to elaborate and study the beneficial interactions between soil bacteria and plants. Some of these methods focus on changes to the plant and others are directed towards assessing the physiology and biochemistry of the beneficial plant growth-promoting bacteria (PGPB). Here, we provide an overview of some of the current techniques that have been employed to study the interaction of plants with PGPB. These techniques include the study of plant microbiomes; the use of DNA genome sequencing to understand the genes encoded by PGPB; the use of transcriptomics, proteomics, and metabolomics to study PGPB and plant gene expression; genome editing of PGPB; encapsulation of PGPB inoculants prior to their use to treat plants; imaging of plants and PGPB; PGPB nitrogenase assays; and the use of specialized growth chambers for growing and monitoring bacterially treated plants.

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Plant-growth-promoting Caulobacter strains isolated from distinct plant hosts share conserved genetic factors involved in beneficial plant–bacteria interactions

Cited by 10 publications

References 35 publications

Exploring the Impact of Coconut Peat and Vermiculite on the Rhizosphere Microbiome of Pre-Basic Seed Potatoes under Soilless Cultivation Conditions

Exploring the Impact of Coconut Peat and Vermiculite on the Rhizosphere Microbiome of Pre-Basic Seed Potatoes under Soilless Cultivation Conditions

Bacterial family-specific enrichment and functions of secretion systems in the rhizosphere

Current Techniques to Study Beneficial Plant-Microbe Interactions

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