Colonization and Competition Dynamics of Plant Growth-Promoting/Inhibiting Bacteria in the Phytosphere of the Duckweed Lemna minor

Ishizawa, Hidehiro; Kuroda, Masatoshi; Inoue, Kanako; Inoue, Daisuke; Morikawa, Masaaki; Ike, Michihiko

doi:10.1007/s00248-018-1306-x

Cited by 34 publications

(32 citation statements)

References 57 publications

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“…These decreases in the abundance of soil bio-inoculants might be attributed to physical and biological factors found in the soil environment [55]. Another factor that might cause a decrease in the abundance of KNU-07 may be microbial competition [53,56]. In this study, the amplicon sequence data of 16S rRNAs revealed that there was a gradual increase in the abundance of the total bacterial over time.…”

Section: Discussionmentioning

confidence: 57%

Response of Soil Bacterial Community and Pepper Plant Growth to Application of Bacillus thuringiensis KNU-07

Tagele

Pham

et al. 2020

Agronomy

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Many Bacillus species are among the plant growth-promoting rhizobacteria (PGPR) that promote the growth of many different plant species. This study aimed to investigate the effects of Bacillus thuringiensis KNU-07 on the growth of pepper plants and the soil microbiota. We also designed primers specific for the strain KNU-07 to monitor the population in pepper-cultivated soil. Accordingly, a strain-specific primer pair was designed using a database constructed from 16,160 complete bacterial genomes. We employed quantitative PCR (qPCR) to track the abundance of the strain KNU-07 introduced into pepper-cultivated soil using the strain-specific primers. Our study revealed that the strain was found to possess plant growth-promoting (PGP) activities, and it promoted the growth of pepper plants. The soil bacterial community structure due to the application of the PGPR strain was significantly changed after six weeks post-inoculation. In addition, based on qPCR analysis, the population of the introduced strain declined over time. In this study, application of a PGPR strain increased the growth of pepper plants and changed the soil bacterial community structure. The successful results of monitoring of a bacterial strain’s population using a single strain-specific primer pair can provide important information about the quantification of bio-inoculants under non-sterile soil conditions.

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Section: Discussionmentioning

confidence: 57%

Response of Soil Bacterial Community and Pepper Plant Growth to Application of Bacillus thuringiensis KNU-07

Tagele

Pham

et al. 2020

Agronomy

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“…On the other hand, most common plant beneficial bacteria belong to genera: Bacillius, Pseudomonas, Bradyrhizobium, Agrobacterium, Enterobacter, and Burkholderia etc. (Ryu et al, 2004;Maksimov et al, 2011;Wang et al, 2012;Gururani et al, 2013;Akhtar et al, 2015;Belimov et al, 2015;Kanwal et al, 2017;Nadeem et al, 2017;Zhou et al, 2017;Cordero et al, 2018;Ishizawa et al, 2019). These PGPR promote plant growth through either direct or indirect mechanism of action (Nadeem et al, 2014).…”

Section: Role Of Cytokinin For Interaction Of Plants With Bacterial Pmentioning

confidence: 99%

Role of Cytokinins for Interactions of Plants With Microbial Pathogens and Pest Insects

et al. 2020

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It has been recognized that cytokinins are plant hormones that influence not only numerous aspects of plant growth, development and physiology, including cell division, chloroplast differentiation and delay of senescence but the interaction with other organisms, including pathogens. Cytokinins are not only produced by plants but are also by other prokaryotic and eukaryotic organism such as bacteria, fungi, microalgae and insects. Notably, cytokinins are produced both by pathogenic and also beneficial microbes and are known to induce resistance in plants against pathogen infections. In this review the contrasting role of cytokinin for the defence and susceptibility of plants against bacterial and fungal pathogen and pest insects is assessed. We also discuss the cross talk of cytokinins with other phytohormones and the underlying mechanism involved in enhancing plant immunity against pathogen infections and explore possible practical applications in crop plant production.

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“…Moreover, existing commercial isolates, which many laboratories use to mimic the WildCom of a given plant, might be genotypically or functionally distinct from microorganisms that researchers find in their new soil samples, thus not genuinely reflecting interactions between plants and the root microbiome in a given natural soil (Liu et al, 2019 ). Only some reports describe the assessment of antagonism among strains in compatibility tests consisting of small experiments such as the cross-streak method, spot inoculation in the vicinity, and evaluation of culture supernatants, among others (Vijayakumar and Muriana, 2015 ; Moran et al, 2016 ; Ijaz et al, 2019 ; Ishizawa et al, 2019 ; Olanrewaju and Babalola, 2019 ). Some authors claim they do not perform compatibility tests when members come from the same plant's natural environment.…”

Section: Discussionmentioning

confidence: 99%

From Microbial Dynamics to Functionality in the Rhizosphere: A Systematic Review of the Opportunities With Synthetic Microbial Communities

2021

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Synthetic microbial communities (SynComs) are a useful tool for a more realistic understanding of the outcomes of multiple biotic interactions where microbes, plants, and the environment are players in time and space of a multidimensional and complex system. Toward a more in-depth overview of the knowledge that has been achieved using SynComs in the rhizosphere, a systematic review of the literature on SynComs was performed to identify the overall rationale, design criteria, experimental procedures, and outcomes of in vitro or in planta tests using this strategy. After an extensive bibliography search and a specific selection process, a total of 30 articles were chosen for further analysis, grouping them by their reported SynCom size. The reported SynComs were constituted with a highly variable number of members, ranging from 3 to 190 strains, with a total of 1,393 bacterial isolates, where the three most represented phyla were Proteobacteria, Actinobacteria, and Firmicutes. Only four articles did not reference experiments with SynCom on plants, as they considered only microbial in vitro studies, whereas the others chose different plant models and plant-growth systems; some of them are described and reviewed in this article. Besides, a discussion on different approaches (bottom-up and top-down) to study the microbiome role in the rhizosphere is provided, highlighting how SynComs are an effective system to connect and fill some knowledge gaps and to have a better understanding of the mechanisms governing these multiple interactions. Although the SynCom approach is already helpful and has a promising future, more systematic and standardized studies are needed to harness its full potential.

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Colonization and Competition Dynamics of Plant Growth-Promoting/Inhibiting Bacteria in the Phytosphere of the Duckweed Lemna minor

Cited by 34 publications

References 57 publications

Response of Soil Bacterial Community and Pepper Plant Growth to Application of Bacillus thuringiensis KNU-07

Response of Soil Bacterial Community and Pepper Plant Growth to Application of Bacillus thuringiensis KNU-07

Role of Cytokinins for Interactions of Plants With Microbial Pathogens and Pest Insects

From Microbial Dynamics to Functionality in the Rhizosphere: A Systematic Review of the Opportunities With Synthetic Microbial Communities

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