Exoenzymes and metabolites related to the nematicidal effect of rhizobacteria on <i>Xiphinema index</i>
 Thorne &amp; Allen

Castañeda-Alvarez, Carlos; Prodan, Simona; Rosales, I. M.; Aballay, Erwin

doi:10.1111/jam.12987

Cited by 22 publications

(11 citation statements)

References 71 publications

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“…This review focuses on B. velezensis, which includes a variety of previously reported strains, namely, B. amyloliquefaciens subsp. plantarum FZB42 [22], B. amyloliquefaciens FR203A [24], B. amyloliquefaciens SQR9 [25], B. amyloliquefaciens NJN-6 [26], B. amyloliquefaciens SQRT3 [27], B. methylotrophicus KACC 13105 T [22], B. velezensis CR-502 T and CR-14b [16], and B. subtilis GB03 [28]. Based on rpoB gene analysis and other analyses, these taxa are synonymous with B. velezensis and are each capable of suppressing pathogens.…”

Section: Emergence Of B Velezensis From the B Subtilis Species Cmentioning

confidence: 99%

“…The nematicidal effect exerted by strain FZB42 has been attributed to plantazolicin, a novel compound encoded by the pzn gene cluster [45]. Culture filtrates of B. amyloliquefaciens FR203A have also been used as biocontrol agents for control of the nematode Xiphinema index, a pest of grape crops in Chile [24].…”

Section: Bioactive Molecules Synthesized By B Velezensismentioning

confidence: 99%

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Bacillus velezensis: A Valuable Member of Bioactive Molecules within Plant Microbiomes

et al. 2019

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Bacillus velezensis is an aerobic, gram-positive, endospore-forming bacterium that promotes plant growth. Numerous strains of this species have been reported to suppress the growth of microbial pathogens, including bacteria, fungi, and nematodes. Based on recent phylogenetic analysis, several Bacillus species have been reclassified as B. velezensis. However, this information has yet to be integrated into a well-organized resource. Genomic analysis has revealed that B. velezensis possesses strain-specific clusters of genes related to the biosynthesis of secondary metabolites, which play significant roles in both pathogen suppression and plant growth promotion. More specifically, B. velezensis exhibits a high genetic capacity for synthesizing cyclic lipopeptides (i.e., surfactin, bacillomycin-D, fengycin, and bacillibactin) and polyketides (i.e., macrolactin, bacillaene, and difficidin). Secondary metabolites produced by B. velezensis can also trigger induced systemic resistance in plants, a process by which plants defend themselves against recurrent attacks by virulent microorganisms. This is the first study to integrate previously published information about the Bacillus species, newly reclassified as B. velezensis, and their beneficial metabolites (i.e., siderophore, bacteriocins, and volatile organic compounds).

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Section: Emergence Of B Velezensis From the B Subtilis Species Cmentioning

confidence: 99%

Section: Bioactive Molecules Synthesized By B Velezensismentioning

confidence: 99%

Bacillus velezensis: A Valuable Member of Bioactive Molecules within Plant Microbiomes

et al. 2019

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“…Extracellular phytase, for instance, is considered as a plant growth promoting factor for improvement of phosphorus-use efficiency by plants (Shao et al, 2015 ). Bacillus amyloliquefaciens has also been used as biocontrol of numerous plant diseases caused by soil-borne microorganisms (Islam et al, 2016 ; Tan et al, 2016 ), post-harvest pathogens (Chen et al, 2016 ), insects (Aziz et al, 2016 ), nematodes (Castaneda-Alvarez et al, 2016 ), and aphids (Gadhave and Gange, 2016 ). Moreover, B. amyloliquefaciens has been reported to directly antagonize plant pathogens by competing for essential nutrients (Wu et al, 2016 ), producing antibiotic compounds (Srivastava et al, 2016 ) and inducing systemic acquired resistance (Ng et al, 2016 ).…”

Section: Introductionmentioning

confidence: 99%

Comparative Genomics of Bacillus amyloliquefaciens Strains Reveals a Core Genome with Traits for Habitat Adaptation and a Secondary Metabolites Rich Accessory Genome

Belbahri

Bouket

Rekik³

et al. 2017

Front. Microbiol.

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The Gram positive, non-pathogenic endospore-forming soil inhabiting prokaryote Bacillus amyloliquefaciens is a plant growth-promoting rhizobacterium. Bacillus amyloliquefaciens processes wide biocontrol abilities and numerous strains have been reported to suppress diverse bacterial, fungal and fungal-like pathogens. Knowledge about strain level biocontrol abilities is warranted to translate this knowledge into developing more efficient biocontrol agents and bio-fertilizers. Ever-expanding genome studies of B. amyloliquefaciens are showing tremendous increase in strain-specific new secondary metabolite clusters which play key roles in the suppression of pathogens and plant growth promotion. In this report, we have used genome mining of all sequenced B. amyloliquefaciens genomes to highlight species boundaries, the diverse strategies used by different strains to promote plant growth and the diversity of their secondary metabolites. Genome composition of the targeted strains suggest regions of genomic plasticity that shape the structure and function of these genomes and govern strain adaptation to different niches. Our results indicated that B. amyloliquefaciens: (i) suffer taxonomic imprecision that blurs the debate over inter-strain genome diversity and dynamics, (ii) have diverse strategies to promote plant growth and development, (iii) have an unlocked, yet to be delimited impressive arsenal of secondary metabolites and products, (iv) have large number of so-called orphan gene clusters, i.e., biosynthetic clusters for which the corresponding metabolites are yet unknown, and (v) have a dynamic pan genome with a secondary metabolite rich accessory genome.

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“…Although the ethyl acetate fraction showed low nematicidal activity (20%), a possible active compound in the ethyl acetate fraction is likely to be responsible for a small portion of the nematicidal activity of the HK160 isolate, as the ethyl acetate fraction showed nematicidal activity at high concentrations exceeding 2,500 μg/ml (data not shown). Extracellular enzymes, including serine proteases, chitinases, and collagenases, have been described as important factors that can degrade the structural constituents of nematode surfaces or eggshells [22]. Extracellular proteases have been intensively studied in relation to antagonistic fungi and bacteria against pathogenic nematodes [23].…”

Section: Resultsmentioning

confidence: 99%

Nematicidal and Plant Growth-Promoting Activity of Enterobacter asburiae HK169: Genome Analysis Provides Insight into Its Biological Activities

Oh¹,

Han²,

Lee³

et al. 2018

Journal of Microbiology and Biotechnology

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In the course of screening for microbes with nematicidal activity, we found that Enterobacter asburiae HK169 displayed promising nematicidal activity against the root-knot nematode Meloidogyne incognita, along with plant growth-promoting properties. Soil drenching of a culture of HK169 reduced gall formation by 66% while also increasing root and shoot weights by 251% and 160%, respectively, compared with an untreated control. The cell-free culture filtrate of the HK169 culture killed all juveniles of M. incognita within 48 h. In addition, the nematicidal activity of the culture filtrate was dramatically reduced by a protease inhibitor, suggesting that proteolytic enzymes contribute to the nematicidal activity of HK169. In order to obtain genomic information about the HK169 isolate related to its nematicidal and plant growth-promoting activities, we sequenced and analyzed the whole genome of the HK169 isolate, and the resulting information provided evidence that the HK169 isolate has nematicidal and plant growth-promoting activities. Taken together, these observations enable the future application of E. asburiae HK169 as a biocontrol agent for nematode control and promote our understanding of the beneficial interactions between E. asburiae HK169 and plants.

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Exoenzymes and metabolites related to the nematicidal effect of rhizobacteria on Xiphinema index Thorne & Allen

Abstract: This is the first report of exoenzymes and metabolites associated with nematicidal effect of rhizobacteria on X. index, which can be a possible alternative for control of this plant-parasitic nematode.

Cited by 22 publications

References 71 publications

Bacillus velezensis: A Valuable Member of Bioactive Molecules within Plant Microbiomes

Bacillus velezensis: A Valuable Member of Bioactive Molecules within Plant Microbiomes

Comparative Genomics of Bacillus amyloliquefaciens Strains Reveals a Core Genome with Traits for Habitat Adaptation and a Secondary Metabolites Rich Accessory Genome

Nematicidal and Plant Growth-Promoting Activity of Enterobacter asburiae HK169: Genome Analysis Provides Insight into Its Biological Activities

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