Bacillus amyloliquefaciens BNM122, a potential microbial biocontrol agent applied on soybean seeds, causes a minor impact on rhizosphere and soil microbial communities

Correa, Olga Susana; Montecchia, Marcela Susana; Berti, María F.; Ferrari, Maria Clara; Pucheu, Norma L.; Kerber, Norma L.; García, Augusto F.

doi:10.1016/j.apsoil.2008.10.007

Cited by 87 publications

(50 citation statements)

References 36 publications

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“…Although the application of agrochemicals controls the growth of pathogen and diseases in plants, their accumulation in soil and water causes detrimental effects on plants and other living organisms, and also risk for sustainable agriculture (Correa et al 2009). An alternative, environmentalfriendly bio-control method is needed for disease control.…”

Section: Introductionmentioning

confidence: 99%

Plant defense approach ofBacillus subtilis(BERA 71) againstMacrophomina phaseolina(Tassi) Goid in mung bean

Hashem

Radhakrishnan

Kumar

2017

Journal of Plant Interactions

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This study was aimed to elucidate the mitigation mechanism of an endophytic bacterium, Bacillus subtilis (BERA 71) against Macrophomina phaseolina (Tassi) Goid disease in mung bean. M. phaseolina reduced the plant growth by inducing disease, hydrogen peroxide (H 2 O 2 ) and lipid peroxidation. The inoculation of B. subtilis to diseased plants increased chlorophyll, ascorbic acids, and superoxide dismutase, catalase, peroxidase, ascorbate peroxidase and glutathione reductase activities, and while inhibited H 2 O 2 and lipid peroxidation for enhancing plant growth. In addition, B. subtilis association in plants mitigated the M. phaseolina infection due to increase of indole acetic acids and indole butyric acid, and also a decrease of abscisic acid. However, the nutrients (N, K, Ca, Mg, Zn, Cu, Mn and Fe) were increased, except Na in M. phaseolina diseased plants treated with B. subtilis. The result of this study suggests that B. subtilis interaction with plants can modulate the metabolism of pigments, hormones, antioxidants and nutrients against M. phaseolina to induce disease resistance in mung bean. ARTICLE HISTORY

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Section: Introductionmentioning

confidence: 99%

Plant defense approach ofBacillus subtilis(BERA 71) againstMacrophomina phaseolina(Tassi) Goid in mung bean

Hashem

Radhakrishnan

Kumar

2017

Journal of Plant Interactions

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“…Recently, the use of biological control agents has received great attention because of the ability of such strains to suppress different plant diseases involving various modes of action (Cazorla et al 2006;Liu et al 2009;Sharma et al 2009) and the possibilities to be integrated with other control methods (Nofal and Haggag 2006;Pertot et al 2008;Correa et al 2009). Among the most promising candidates for bacterial biocontrol agents are several species of the genus Bacillus.…”

Section: Introductionmentioning

confidence: 99%

Iturin A is the principal inhibitor in the biocontrol activity ofBacillus amyloliquefaciensPPCB004 against postharvest fungal pathogens

Arrebola

Jacobs

Korsten

2010

Journal of Applied Microbiology

308

174

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Aims: A Bacillus amyloliquefaciens strain, surviving epiphytically on the surface of fruit, was isolated while searching for naturally occurring biological control agents. This bacterial strain was characterized for its antifungal activity against seven selected fungal postharvest pathogens of citrus. Methods and Results: To understand the antifungal activity, seven postharvest fungal pathogens were screened for growth inhibition by B. amyloliquefaciens strain. Assays using B. amyloliquefaciens lipopeptide extracts showed a strong inhibitive activity. The inhibitory effect was observed in abnormal conidial germination and germ tube development when conidia were treated with different lipopeptide extract concentrations. Further analysis using PCR and chromatography confirmed the presence of fengycin, iturin and surfactine, of which iturin A showed the strongest and most common inhibitory effect. The results are supported by site‐directed mutagenesis analysis, targeted to suppress the biosynthesis of iturin A production. Fruit trials confirmed disease development inhibition when the antagonist was applied 1 day prior to or 1 day after fungal application. Conclusions: We conclude that the iturin family of lipopeptides are vital in the antagonism of B. amyloliquefaciens against the seven citrus postharvest pathogenic fungi tested. Significance and Impact of the Study: We elucidated the principal mechanism used by B. amyloliquefaciens PPCB004 to suppress postharvest disease development on stored fruits.

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“…were also obtained in non-composted and semicomposted plots, compared to non-amended plots. Interestingly, significant differences were however obtained regarding CD and EP indices between these two treatments: the higher CD values in semicomposted soils indicate a greater proportion of r-strategists; in contrast, the higher EP values in non-composted soils suggest a more even distribution of the bacterial community structure (Correa et al, 2009). Although a change in the composition and diversity of microbial communities during OM decomposition has been related with disease suppression (van Bruggen & Semenov, 2000), in our experiment, no differences in soil suppressiveness and disease incidence were observed between non-composted and semicomposted plots.…”

Section: Discussionmentioning

confidence: 92%

“…Total bacteria data were used to calculate the colony development index (CD) (Kozdrój et al, 2004) and the ecophysiological index (EP) (de Leij et al, 1993). Both indices were calculated as described in Correa et al (2009). Briefly, CD index was calculated as follows: CD = (N 1 /1 + N 2 /2 + + N 3 /3 + N 4 /4 + N 7 /7), where N = proportion of total bacteria appearing on each day.…”

Section: Microbial Propertiesmentioning

confidence: 99%

Repeated biodisinfection controls the incidence of Phytophthora root and crown rot of pepper while improving soil quality

Núñez-Zofío

Larregla

Garbisu

2012

Span. j. agric. res.

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Phytophthora root and crown rot is a plant disease responsible for important economic losses in protected pepper crops. A greenhouse experiment was carried out in a temperate climate region (northern Spain) to assess the effects of repeated biodisinfection after three consecutive crop seasons with different organic amendments (a non-composted mixture of sheep manure and chicken litter, a semicomposted mixture of horse manure and chicken litter, Brassica carinata dehydrated pellets plus Sinapis alba fresh green manure) on disease incidence, crop yield and soil quality. Biodisinfection treatments were found to improve soil water properties through reduction in soil bulk density and increased water infiltration. Biodisinfested soils showed higher values of physicochemical and microbial properties than control (untreated) and plastic-mulched soils. In plots treated with the non-composted or semicomposted mixture, the observed higher levels of microbial activity were strongly related with an increase in soil microbial biomass. Brassica-Sinapis treatment had a weaker effect on soil properties than animal manure-based treatments. However, highest counts of total bacteria, actinomycetes and Pseudomonas spp. were found in BrassicaSinapis-treated soils. It was concluded that repeated biodisinfection for the control of Phytophthora root and crown rot in protected pepper crops located in temperate climate regions can improve soil quality and suppressiveness, as well as allow for a reduction in the dose of organic amendment needed for biodisinfection. Among the studied organic amendments, the semicomposted amendment was the best option in terms of reduction in disease incidence.Additional key words: biofumigation; organic amendment; soil microbial properties; soilborne plant pathogens; solarization; suppressiveness. ResumenLa reiteración de la biodesinfección controla la incidencia de la podredumbre radicular y del cuello del pimiento causada por Phytophthora y mejora la calidad del suelo La podredumbre radicular y del cuello causada por Phytophthora es una enfermedad que genera importantes pérdi-das económicas en cultivos de pimiento en invernadero. En una región de clima templado (norte de España) se realizó ensayo en invernadero para evaluar la reiteración de tratamientos de biodesinfección después de tres ciclos de cultivo consecutivos con diferentes enmiendas orgánicas (mezcla no-compostada de estiércol de oveja y gallinaza, mezcla semicompostada de estiércol de caballo y gallinaza, pellets deshidratados de Brassica carinata más Sinapis alba como abono verde fresco) sobre la incidencia de la enfermedad, la producción y la calidad del suelo. La biodesinfección mejoró las propiedades hídricas del suelo al reducir la densidad aparente y aumentar la infiltración. Los suelos biodesinfectados mostraron valores más altos en las propiedades físico-químicas y microbianas que los suelos control (no tratado) y acolchado con plástico. En las enmiendas no-compostada y semicompostada, los valores más altos de acti-*Correspond...

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Bacillus amyloliquefaciens BNM122, a potential microbial biocontrol agent applied on soybean seeds, causes a minor impact on rhizosphere and soil microbial communities

Cited by 87 publications

References 36 publications

Plant defense approach ofBacillus subtilis(BERA 71) againstMacrophomina phaseolina(Tassi) Goid in mung bean

Plant defense approach ofBacillus subtilis(BERA 71) againstMacrophomina phaseolina(Tassi) Goid in mung bean

Iturin A is the principal inhibitor in the biocontrol activity ofBacillus amyloliquefaciensPPCB004 against postharvest fungal pathogens

Repeated biodisinfection controls the incidence of Phytophthora root and crown rot of pepper while improving soil quality

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