Organic acids from root exudates of banana help root colonization of PGPR strain Bacillus amyloliquefaciens NJN-6

Yuan, Jun; Zhang, Nan; Huang, Qiwei; Raza, Waseem; Li, Rong; Vivanco, Jorge M.; Shen, Qirong

doi:10.1038/srep13438

Cited by 199 publications

(133 citation statements)

References 40 publications

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“…In the same species, chemotaxis to Krebs cycle intermediates was identified as another important component of root colonization, and similar observations have also been made for Bacillus amyloliquefaciens (35). Furthermore, chemotaxis to GABA and polyamines was associated with root colonization in Pseudomonas putida KT2440 (36,37).…”

supporting

confidence: 66%

Recent Advances and Future Prospects in Bacterial and Archaeal Locomotion and Signal Transduction

et al. 2017

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The structure and function of two-component and chemotactic signaling and different aspects related to the motility of bacteria and archaea are key research areas in modern microbiology. Escherichia coli is the traditional model organism used to study chemotaxis signaling and motility. However, the recent study of a wide range of bacteria and even some archaea with different lifestyles has provided new insight into the ecophysiology of chemotaxis, which is essential for the establishment of different pathogens or beneficial bacteria in a host. The expanded range of model organisms has also permitted the study of chemosensory pathways unrelated to chemotaxis, multiple chemotaxis pathways within an organism, and new types of chemoreceptors. This research has greatly benefitted from technical advances in the field of cryomicroscopy, which continues to reveal with increasing resolution the complexity and diversity of large protein complexes like the flagellar motor or chemoreceptor arrays. In addition, sensitive instruments now allow an increasing number of experiments to be conducted at the single-cell level, thereby revealing information that is beginning to bridge the gap between individual cells and population behavior. Evidence has also accumulated showing that bacteria have evolved different mechanisms for surface sensing, which appears to be mediated by flagella and possibly type IV pili, and that the downstream signaling involves chemosensory pathways and two-component-system-based processes. Herein, we summarize the recent advances and research tendencies in this field as presented at the latest Bacterial Locomotion and Signal Transduction (BLAST XIV) conference.KEYWORDS chemotaxis, flagella, flagellar motility, signal transduction, two-component regulatory systems T he capacity to sense and respond to changes in environmental cues is an essential feature of the prokaryotic lifestyle. As a consequence, bacteria and archaea have evolved an array of different molecular mechanisms that permit the detection of signals in order to generate appropriate cellular responses. These responses are mediated primarily by one-and two-component systems, as well as chemosensory signaling pathways (1-4). Whereas the former systems mediate changes primarily at the transcriptional level, chemosensory pathways form the basis for chemotaxis, the directed movement of prokaryotes in compound gradients. The study of signaling processes is not only of fundamental interest but may also contribute to the tackling of one of the central clinical problems, which is the increasing amount of antibiotic-resistant pathogens. There is now a significant amount of data indicating that interference with signal transduction systems, motility, and chemotaxis can be an alternative strategy to weaken or block pathogens (5, 6).In

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supporting

confidence: 66%

Recent Advances and Future Prospects in Bacterial and Archaeal Locomotion and Signal Transduction

et al. 2017

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“…; Yuan et al . ). Plants experience distinct needs at different growth stages that could be facilitated by beneficial microbes.…”

Section: Introductionmentioning

confidence: 97%

Co‐inoculation ofBacillussp. andPseudomonas putidaat different development stages acts as a biostimulant to promote growth, yield and nutrient uptake of tomato

Pantigoso

et al. 2019

J Appl Microbiol

105

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Aims This study builds upon the premise that roots culture distinct bacteria at specific stages of plant growth to benefit of specific microbial services needed at that particular growth stage. Accordingly, we hypothesized that the co‐inoculation of beneficial microbes with distinct properties at specific stages of plant development would enhance plant performance. Methods and Results The chosen microbes were Bacillus pumilus, Bacillus amyloliquefaciens, Bacillus mojavensis and Pseudomonas putida. These microbes were selected based on their specific services ranging from nutrient solubilization, root growth promotion and disease resistance, and were applied to the roots of tomato plants at specific time points when those services were needed the most by the plant. Laboratory and greenhouse studies were conducted to evaluate the effects of co‐inoculation at specific stages of development compared to single microbial applications. Conclusion In general, the combination of three microbes gave the highest biomass and yield without the presence of disease. Applications of three microbes showed the highest root/shoot ratio, and applications of four microbes the lowest ratio. Pseudomonas putida significantly increased fruit macronutrient and micronutrient contents. Significance and Impact of the Study Our studies suggest that co‐inoculation of three or four microbes is a good strategy for healthy crop production.

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“…Yuan et al (2015) described how organic acids from banana roots exudates could attract a beneficial strain of Bacillus amyloliquefaciens and promote its biofilm formation. Veliz-Vallejos et al (2014) observed an increase in nodule number in Medicago truncatula under the impact of 3-oxo-C14-HSL, an N-acyl-homoserine lactone (the major group of quorum-sensing signal molecules in gram-negative bacteria) produced by Ensifer meliloti.…”

Section: Rhizosphere and Root Colonizationmentioning

confidence: 99%

“…In order to acquire the beneficial effects from the microbial communities, it is crucial an effective colonization of the plant root area (Yuan et al 2015).…”

Section: Rhizosphere and Root Colonizationmentioning

confidence: 99%

Effective Colonization of Spinach Root Surface by Rhizobium

Jiménez‐Gómez

Menéndez

Flores-Félix

et al. 2016

Biological Nitrogen Fixation and Beneficial Plant-Microbe Interaction

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Plant growth-promoting rhizobacteria are a group of bacteria able to promote plant growth and increase crop productivity. For a successful and effective bacteria-plant association, microorganism colonization and its arrangement and abundance on plant root surfaces are very important. Here, we analysed the ability of the strain PEPV12 identified as Rhizobium sp., to colonize spinach (Spinacia oleracea) root surfaces, and evaluated three parameters of in vitro plant growth promotion: (i) siderophore production, (ii) phosphate solubilization and (iii) indole acetic acid production. Moreover, we tested in vitro cellulose production and biofilm formation. Our results showed that this strain colonizes effectively and adheres to abiotic surfaces. Root colonization and adherence events were observed under fluorescence microscopy by using GFP-tagged PEPV12 strain, which was inoculated on spinach seedlings. Interestingly, we observed morphologic changes in root hairs, such as deformations and redirections at the tip in early stages of plant development of PEPV12 inoculated plants. Furthermore, we proceeded to evaluate in vitro plant development after inoculation of spinach seedlings with the strain of this study, showing significant differences in shoot length with respect to uninoculated plants. Our results showed that Rhizobium sp. PEPV12 actively and successfully colonizes spinach root surfaces, producing changes in root hairs and an increase in plant growth, suggesting its potentiality as a biofertilizer for Spinacia oleracea.

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Organic acids from root exudates of banana help root colonization of PGPR strain Bacillus amyloliquefaciens NJN-6

Cited by 199 publications

References 40 publications

Recent Advances and Future Prospects in Bacterial and Archaeal Locomotion and Signal Transduction

Recent Advances and Future Prospects in Bacterial and Archaeal Locomotion and Signal Transduction

Co‐inoculation ofBacillussp. andPseudomonas putidaat different development stages acts as a biostimulant to promote growth, yield and nutrient uptake of tomato

Effective Colonization of Spinach Root Surface by Rhizobium

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