Bacterial regulation of antagonistic activity of bacteria

Семенов, А. В.; Sgibnev, A. V.; Черкасов, С. В.; Бухарин, О В

doi:10.1007/s10517-007-0410-6

Cited by 7 publications

(5 citation statements)

References 7 publications

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“… Ullah and Bano (2019) demonstrated that these PGPR have significantly improved the growth and yield of maize grown in saline sodic soil as well physico-chemical properties of soil. Compatibility of these strains was also assessed using a cross streak method ( Semenov et al, 2007 ) on NaCl supplemented LB-medium prior to seed inoculation. Pure saline soil used for the experiment was brought from field area of Biosaline Research Station, Pakka Anna, Faisalabad, Pakistan.…”

Section: Methodsmentioning

confidence: 99%

Potential of Salt Tolerant PGPR in Growth and Yield Augmentation of Wheat (Triticum aestivum L.) Under Saline Conditions

et al. 2020

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Soil salinity has emerged as a major obstacle to meet world food demands. Halo-tolerant plant growth promoting rhizobacteria (PGPR) are potential bioinoculants to enhance crop productivity in saline agriculture. Current work was aimed at studying individual or synergetic impact of salt tolerant PGPR on wheat growth and yield under saline conditions. A pot experiment was conducted on two wheat genotypes (Aas-11; salt tolerant and Galaxy-13; salt sensitive) inoculated with Pseudomonas fluorescence, Bacillus pumilus , and Exiguobacterium aurantiacum alone and in consortium. The salt tolerant variety (Aas-11) exhibited maximum root fresh (665.2%) and dry biomass (865%), free proline (138.12%) and total soluble proteins (155.9%) contents, CAT (41.7%) activity and shoot potassium uptake (81.08%) upon inoculation with B. pumilus , while improved shoot dry weight (70.39%), water (23.49%) and osmotic (29.65%) potential, POD (60.51%) activity, enhanced root potassium (286.36%) and shoot calcium (400%) were manifested by E. aurantiacum. Highest shoot length (14.38%), fresh weight (72.73%), potassium (29.7%) and calcium (400%) acquisition as well as glycinebetaine (270.31%) content were found in plants treated with PGPR consortium. On the other hand, in the salt sensitive variety (Galaxy-13), P. fluorescens treated plants showed significantly improved leaf-water relations, glycinebetaine (10.78%) content, shoot potassium (23.07%), root calcium (50%) uptake, and yield parameters, respectively. Plant root length (71.72%) and potassium content (113.39%), root and shoot fresh and dry biomass, turgor potential (231.02%) and free proline (317.2%) content were maximum upon PGPR inoculation in consortium. Overall, Aas-11 (salt tolerant variety) showed significantly better performance than Galaxy-13 (salt sensitive variety). This study recommends B. pumilus and E. aurantiacum for the salt tolerant (Aas-11) and P. fluorescens for the salt sensitive (Galaxy-13) varieties, as potential bioinoculants to augment their growth and yield through modulation of morpho-physiological and biochemical attributes under saline conditions.

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Section: Methodsmentioning

confidence: 99%

Potential of Salt Tolerant PGPR in Growth and Yield Augmentation of Wheat (Triticum aestivum L.) Under Saline Conditions

et al. 2020

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“…Activity of Bacillus strains against pathogens were studied by the method of delayed antagonism in solid nutrient medium [19]. Briefly, Bacillus strains were inoculated as a line on the surface of a nutrient media.…”

Section: Antagonistic Activity Of Bacillus Strainsmentioning

confidence: 99%

Antagonistic Activity of Bacillus Bacteria against Food-Borne Pathogens

Moore¹

2013

J Prob Health

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Bacillus bacteria have attracted the attention of scientists as promising probiotics because of their versatile antimicrobial activity and established health benefits on the host. In this study, seven Bacillus strains were identified and analyzed for antagonistic activity against broad spectrum of food borne pathogens. All strains were identified as B. subtilis, based on the results of morphological, biochemical characterization and 16S rDNA sequence analysis. B. subtilis strains demonstrated antagonistic activity against test-cultures of pathogens, including multiresistant strains. Reference Bacillus strains, derived from the commercial probiotics did not show antagonistic activity against tested strains of pathogens. Three the most active cultures were studied for production of biosurfactants. Crude biosurfactants were isolated and analyzed by oil spread test and inhibition activity against Salmonella, Shigella and Staphylococcus cultures. Biosurfactants from three tested B. subtilis strains gave positive oil spread test. Inhibition activity of biosurfactants was found only against Staphylococcus strains. Production of biosurfactants depended on the incubation conditions of Bacillus culture. Best results were obtained after cultivation of bacilli in starch broth at 30°C. The concentration of produced biosurfactant increased in time with growth of bacteria and reached the maximum at 30 hours of incubation.

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“…In vitro test is a one of the preferred of antagonism test to select probiotics bacteria. Antagonistic activity of bacteria is a prevalent phenomenon which one bacterium species suppresses the development or inhibits the growth of other microorganisms (Semenov et al, 2007). In this study, all potential probionts were identified as Bacillus amyloliquefaciens which were isolated from heamolymph of blue crab.…”

Section: Discussionmentioning

confidence: 97%

Characterization of potential probionts from blue swimming crab Portunus pelagicus and its antagonistic activity against Vibrio harveyi

Rahman¹,

Esa²,

Yasin³

et al. 2017

Int. J. Biosci.

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The aim of this study was to isolate local bacteria as potential probiont in controlling the growth of pathogenic Vibrio harveyi. Eleven potential bacteria were successfully isolated from the haemolymph of four healthy Portunus pelagicus. All of the isolates were identified as Bacillus amyloliquefaciens by series of biochemical test using triple sugar ion test, oxidase and catalase test, followed by Internal Transcribe Spacer (ITS) gene sequence analysis. This isolate was able to inhibit the growth of V. harveyi in in-vitro screening assay by using well diffusion assay with the strong antagonistic activity from 7 to 16 mm. The potential strains at 10 8 CFU/ml showed highest inhibition response towards V. harveyi after co-cultured for 48 hr. The isolates produced four major extracellular enzymes which were amylase, protease, gelatinase and lipase and able to form biofilm after 24 hr of cultured. Thus, B. amyloliquefaciens showed important characteristics as probiotic which worth to be carried out for in vivo challenge assay.

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Bacterial regulation of antagonistic activity of bacteria

Cited by 7 publications

References 7 publications

Potential of Salt Tolerant PGPR in Growth and Yield Augmentation of Wheat (Triticum aestivum L.) Under Saline Conditions

Potential of Salt Tolerant PGPR in Growth and Yield Augmentation of Wheat (Triticum aestivum L.) Under Saline Conditions

Antagonistic Activity of Bacillus Bacteria against Food-Borne Pathogens

Characterization of potential probionts from blue swimming crab Portunus pelagicus and its antagonistic activity against Vibrio harveyi

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