scholarly journals Influence of Bacillus Spp. Based Bioproducts on Potato Plant Growth and Control of Rhizoctonia Solani

2019 ◽  
Vol 76 (1) ◽  
pp. 29
Author(s):  
Sorina DINU ◽  
Oana Alina BOIU-SICUIA ◽  
Florica CONSTANTINESCU
Keyword(s):  
Plant Growth ◽  
Rhizoctonia Solani ◽  
Plant Growth Promotion ◽  
Growth Promotion ◽  
Aqueous Suspension ◽  
Potato Plants ◽  
Bacillus Spp ◽  
Seeding Material ◽  
Biocontrol Potential ◽  
And Control

Some Bacillus based bioproducts were analyzed for their plant growth promotion and Rhizoctonia solani biocontrol potential in potato plants. The bioproducts were formulated as concentrated aqueous suspension, each containing one of the following plant beneficial bacteria: Bacillus safensis Rd.b2, Bacillus spp. 75.1s and Cp.b4 strains. These were applied on potato seeding material in order to evaluate plant growth promotion effects. The biocontrol efficacy was also evaluated, using Rhizoctonia solani DSM 63002 as plant pathogen, and Prestige 290FS as reference chemical treatment.In the plant growth-promotion experiments, several biologic parameters were biometrically evaluated. Best results regarding plant growth and vigor were obtained using CropMax, a commercial phytostimulatory product. However, the bacterial treatment with Bacillus spp. Cp.b4 and 75.1s showed an improved plant growth compared to the untreated control. An efficacy of 93.75% against Rhizoctonia dumping-off was registered when using the Prestige 290FS chemical control. Mix treatments based on this pesticide, in low dose, combined with Cp.b4 or 75.1s biocontrol strains significantly reduced the pathogenic attack, showing 85 to 87.5% efficacy.The present research demonstrated that the bacterial bioproducts based on Bacillus spp. 75.1s and Cp.b4 strains increase plant growth and are highly effective in controlling Rhizoctonia attack in potato plants.

scholarly journals Perception of Biocontrol Potential of Bacillusinaquosorum KR2-7 against Tomato Fusarium Wilt through Merging Genome Mining with Chemical Analysis

Biology ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 137
Author(s):  
Maedeh Kamali ◽  
Dianjing Guo ◽  
Shahram Naeimi ◽  
Jafar Ahmadi
Keyword(s):  
Chemical Analysis ◽  
Plant Growth ◽  
Fusarium Wilt ◽  
Plant Growth Promotion ◽  
Growth Promotion ◽  
Genome Mining ◽  
Gene Clusters ◽  
Systemic Resistance ◽  
Plant Colonization ◽  
Biocontrol Potential

Tomato Fusarium wilt, caused by Fusarium oxysporum f. sp. lycopersici (Fol), is a destructive disease that threatens the agricultural production of tomatoes. In the present study, the biocontrol potential of strain KR2-7 against Fol was investigated through integrated genome mining and chemical analysis. Strain KR2-7 was identified as B. inaquosorum based on phylogenetic analysis. Through the genome mining of strain KR2-7, we identified nine antifungal and antibacterial compound biosynthetic gene clusters (BGCs) including fengycin, surfactin and Bacillomycin F, bacillaene, macrolactin, sporulation killing factor (skf), subtilosin A, bacilysin, and bacillibactin. The corresponding compounds were confirmed through MALDI-TOF-MS chemical analysis. The gene/gene clusters involved in plant colonization, plant growth promotion, and induced systemic resistance were also identified in the KR2-7 genome, and their related secondary metabolites were detected. In light of these results, the biocontrol potential of strain KR2-7 against tomato Fusarium wilt was identified. This study highlights the potential to use strain KR2-7 as a plant-growth promotion agent.

scholarly journals Comparative Study on Plant Growth Promotion by Endophytic Pseudomonas Spp. and Bacillus Spp. of Solanum Lycopersicum

2017 ◽  
Vol 4 (4) ◽  
pp. 464-469
Author(s):  
Sampada Mishra ◽  
Saroj Kumar Mahato ◽  
Sabin Basi ◽  
Shradha Basi-Chipalu
Keyword(s):  
Plant Growth ◽  
Solanum Lycopersicum ◽  
Plant Growth Promotion ◽  
Growth Promotion ◽  
Shoot Biomass ◽  
Shoot Height ◽  
Plant Growth Hormones ◽  
Pseudomonas Spp ◽  
Bacillus Spp ◽  
Phosphate Solubilizing

Minimization of deleterious effects of chemical fertilizers on health, ecosystem and economy can only be achieved by finding healthy, eco-friendly and cheap alternatives. Naturally selected symbiotic relationship between the endophytic bacteria and their host plants makes them an ideal candidate as biofertilizer. They can synthesize various plant growth hormones as well as assist their host in uptake of nutrients from soil.The study was designed to compare plant growth promotion of Solanum lycopersicum by Bacillus spp., Pseudomonas spp. and total endophytic community isolated from roots of S. lycopersicum, grown in the soil samples collected from various locations of Kathmandu valley of Nepal. Tomato seeds were inoculated with mixtures of eight endophytic strains of Bacillus spp. and Pseudomonas spp., and crude endophytes obtained from each location separately.Endophytic treatments, except Pseudomonas spp., inhibited seminal root growth during 12-days germination period. However, after plantation, root and shoot biomass was enhanced by the endophytes, with no significant differences among the bacterial treatments. The shoot height was also enhanced, among which Pseudomonas spp. had the strongest effect. In phosphate solubilization assay, out of seventy-two isolates each of Bacillus spp. and Pseudomonas spp. tested, twenty-four isolates of Pseudomonas spp. and sixteen isolates of Bacillus spp. could solubilize phosphate. Higher number of phosphate solubilizing isolates of Pseudomonas spp. might provide a possible explanation for the greater enhancement of shoot height by Pseudomonas spp. as compared to Bacillus spp.Int J Appl Sci Biotechnol, Vol 4(4): 464-469

scholarly journals Draft Genome Sequence ofBacillus subtilis2C-9B, a Strain with Biocontrol Potential against Chili Pepper Root Pathogens and Tolerance to Pb and Zn

2018 ◽  
Vol 6 (3) ◽  
Author(s):  
Claudia Y. Muñoz-Moreno ◽  
Yumiko De La Cruz-Rodríguez ◽  
Julio Vega-Arreguín ◽  
Miguel Alvarado-Rodríguez ◽  
José Manuel Gómez-Soto ◽  
...  
Keyword(s):  
Bacillus Subtilis ◽  
Plant Growth ◽  
Capsicum Annuum ◽  
Genome Sequence ◽  
Plant Growth Promotion ◽  
Root Rot ◽  
Growth Promotion ◽  
Draft Genome ◽  
Root Pathogens ◽  
Biocontrol Potential

ABSTRACTBacillus subtilis2C-9B, obtained from the rhizosphere of wild grass, exhibits inhibition against root rot causal pathogens inCapsicum annuum, Pb and Zn tolerance, and plant growth promotion in medium supplemented with Pb. The genome ofB. subtilis2C-9B was sequenced and the draft genome assembled, with a length of 4,215,855 bp and 4,723 coding genes.

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