Evaluation of biological control and rhizosphere competence of plant growth promoting bacteria

Bach, Evelise; Seger, Guilherme Dubal dos Santos; Fernandes, Gabriela de Carvalho; Lisboa, Bruno Brito; Passaglia, Luciane Maria Pereira

doi:10.1016/j.apsoil.2015.11.002

Cited by 114 publications

(62 citation statements)

References 68 publications

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“…PIC28 harbored a considerably lower number of genes potentially coding for cell wall-degrading enzymes (as well as antibiotics) than the two Paenibacillus strains. The ability to produce fungal cell wall-degrading enzymes and a broad spectrum of antibiotics seem to be common to aerobic spore-forming bacteria [74].…”

Section: Discussionmentioning

confidence: 99%

Bacillales Members from the Olive Rhizosphere Are Effective Biological Control Agents against the Defoliating Pathotype of Verticillium dahliae

et al. 2018

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The use of biological control agents (BCAs) is of interest within an integrated management strategy of Verticillium wilt of olive (VWO) caused by the soil-borne fungus Verticillium dahliae Kleb. Previous studies have shown that the root/rhizosphere of healthy olive plants is an important reservoir of microorganisms displaying biocontrol activity against VWO (i.e., Pseudomonas strains PICF7 and PIC141). Moreover, these BCAs are already adapted to the ecological niche where they are deployed. Three novel bacteria (strains PIC28, PIC73 and PIC167) from nursery-produced olive plants were in-depth characterized using a previously implemented approach consisting of in situ isolation, in vitro antagonism tests, in planta bioassays, phenotypic and metabolic characterization, genome analyses and in silico identification of traits involved in plant-bacteria interactions, and multi-locus sequence analyses. All strains displayed in vitro growth inhibition of different olive pathogens and biocontrol effectiveness against Verticillium dahliae, with strain PIC73 being the most effective BCA. Strains PIC73 and PIC167 were identified as Paenibacillus polymyxa (Prazmowski) Ash et al. and Paenibacillus terrae Yoon et al., respectively. Strain PIC28 belongs to the Bacillus genus. Some of these Bacillales members showed in vitro compatibility with previously characterized BCAs (Pseudomonas spp. strains) also originating from the olive rhizosphere, paving the way for the future development of tailored bacterial consortia effective against VWO.

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Section: Discussionmentioning

confidence: 99%

Bacillales Members from the Olive Rhizosphere Are Effective Biological Control Agents against the Defoliating Pathotype of Verticillium dahliae

et al. 2018

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“…Similarly with Bacillus and Paenibacillus, Burkholderia has direct and positive effects on plant growth through BNF, phosphate solubilization, and the production of hormones (Bacha et al, 2016). Indirectly, this genus produces antagonistic compounds for pathogens, such as hydrolytic enzymes, and antibiotics (da Costa et al, 2014).…”

Section: Resultsmentioning

confidence: 99%

Diversity of plant growth-promoting bacteria associated with sugarcane

Antunes¹,

Lyra²,

Ollero³

et al. 2017

Genet. Mol. Res.

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ABSTRACT. The sugarcane (Saccharum spp) presents economic importance, mainly for tropical regions, being an important Brazilian commodity. However, this crop is strongly dependent on fertilizers, mainly nitrogen (N). This study assessed the plant growth-promoting bacteria (PGPB) associated with sugarcane that could be used as a potential inoculant to the crop. We evaluated the genetic diversity of PGPB in the plant tissue of sugarcane varieties (RB 867515, RB 1011, and RB 92579). The primer BOX-A1R was used to differentiate the similar isolated and further sequencing 16S rRNA ribosomal gene. The 16S rRNA gene showed the presence of seven different genera distributed into four groups, the genus Bacillus, followed by Paenibacillus (20%), Burkholderia (14%), Herbaspirillum (6%), Pseudomonas (6%), Methylobacterium (6%), and Brevibacillus (3%). The molecular characterization of endophytic isolates from sugarcane revealed a diversity of bacteria colonizing this plant, with a possible biotechnological potential to be used as inoculant and biofertilizers.

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“…Petri dish experiment. First, the antifungal activity of A. faecalis non-volatile compounds on B. cinerea and the three entomopathogenic fungi (M. circinelloides, M. racemosus, R. variabilis) was assessed using a modified method from (Bach et al, 2016). Briefly, 0.1 ml A. faecalis bacterial suspension (3 9 10 6 cells ml À1 ) was smeared on TSY-agar medium in 9 cm Petri dish, after which, a 5 mm wide fungal colony was inoculated in the centre of the Petri dish and incubated at 27°C in the dark (Wang et al, 2011).…”

Section: Antifungal Effect Of Entomopathogenic Bacteria a Faecalis Nmentioning

confidence: 99%

The symbiotic bacteria Alcaligenes faecalis of the entomopathogenic nematodes Oscheius spp. exhibit potential biocontrol of plant‐ and entomopathogenic fungi

Shan

Wang

Cui

et al. 2019

Microbial Biotechnology

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Summary Soil‐dwelling entomopathogenic nematodes ( EPN s) kill arthropod hosts by injecting their symbiotic bacteria into the host hemolymph and feed on the bacteria and the tissue of the dying host for several generations cycles until the arthropod cadaver is completely depleted. The EPN –bacteria–arthropod cadaver complex represents a rich energy source for the surrounding opportunistic soil fungal biota and other competitors. We hypothesized that EPN s need to protect their food source until depletion and that the EPN symbiotic bacteria produce volatile and non‐volatile exudations that deter different soil fungal groups in the soil. We isolated the symbiotic bacteria species ( Alcaligenes faecalis ) from the EPN Oscheius spp. and ran infectivity bioassays against entomopathogenic fungi ( EPF ) as well as against plant pathogenic fungi ( PPF ). We found that both volatile and non‐volatile symbiotic bacterial exudations had negative effects on both EPF and PPF . Such deterrent function on functionally different fungal strains suggests a common mode of action of A. faecalis bacterial exudates, which has the potential to influence the structure of soil microbial communities, and could be integrated into pest management programs for increasing crop protection against fungal pathogens.

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Evaluation of biological control and rhizosphere competence of plant growth promoting bacteria

Cited by 114 publications

References 68 publications

Bacillales Members from the Olive Rhizosphere Are Effective Biological Control Agents against the Defoliating Pathotype of Verticillium dahliae

Bacillales Members from the Olive Rhizosphere Are Effective Biological Control Agents against the Defoliating Pathotype of Verticillium dahliae

Diversity of plant growth-promoting bacteria associated with sugarcane

The symbiotic bacteria Alcaligenes faecalis of the entomopathogenic nematodes Oscheius spp. exhibit potential biocontrol of plant‐ and entomopathogenic fungi

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