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Wekesa TB, Wekesa VW, Onguso JM, Kavesu N, Okanya PW. Study of Pathogenicity Test, Antifungal Activity, and Secondary Metabolites of Bacillus spp. from Lake Bogoria as Biocontrol of Rhizoctonia solani Kühn in Phaseolus vulgaris L. Int J Microbiol 2024; 2024:6620490. [PMID: 38974709 PMCID: PMC11226341 DOI: 10.1155/2024/6620490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 03/05/2024] [Accepted: 05/23/2024] [Indexed: 07/09/2024] Open
Abstract
The common bean (Phaseolus vulgaris L.) is a yearly herbaceous plant grown for its edible dry seeds. Despite that, pests and diseases have contributed to the decline of common bean production in Kenya. Therefore, the study aimed to identify bacteria from Lake Bogoria, assess the pathogenicity of Rhizoctonia solani Kühn, screen for effective antifungal agents, and determine secondary metabolites for the biocontrol of R. solani. A total of 49 bacteria were isolated, of which 10 isolates had varied mycelial inhibition rates of R. solani in the co-culture technique. The efficacy of volatile compounds of the three selected bacterial strains had varied mycelial growth and percent reduction against R. solani. The pathogenicity assay showed varied plant parameters and biomass of R. solani on common bean plantlets. The molecular characterization based on 16 S ribosomal RNA confirmed the selected bacterial strains' identity with a diversity similar to the Bacillus genus. Gas chromatography-mass spectrometry analysis of secondary metabolites showed different antimicrobial compounds produced by Bacillus subtilis strain TW21. In conclusion, Lake Bogoria harbors useful microbes as biocontrol agents against plant pathogens. The current study discovers the potential biocontrol bacteria isolates from Lake Bogoria as alternative bioagents against R. solani. Therefore, the isolate Bacillus subtilis strain TW21 can be assessed further for toxicological and ecotoxicological studies and registered by the Pest Control Products Board (PCPB), Kenya, as a biocontrol product against common diseases affecting common beans' production.
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Affiliation(s)
- Tofick Barasa Wekesa
- Jomo Kenyatta University of Agriculture and Technology, Institute for Biotechnology Research, P.O. Box 62000-00200, Nairobi, Kenya
| | - Vitalis Wafula Wekesa
- Bioline Agrosciences Africa Limited Production, P.O. Box 1927-20117, Naivasha, Kenya
| | - Justus Mong'are Onguso
- Jomo Kenyatta University of Agriculture and Technology, Institute for Biotechnology Research, P.O. Box 62000-00200, Nairobi, Kenya
| | - Ndinda Kavesu
- Jomo Kenyatta University of Agriculture and Technology, Institute for Biotechnology Research, P.O. Box 62000-00200, Nairobi, Kenya
| | - Patrick Wafula Okanya
- The Technical University of Kenya, Department of Biochemistry and Biotechnology, P.O. Box 52428-00200, Nairobi, Kenya
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Alizadeh-Bami F, Mehrabi H, Ranjbar-Karimi R. Facile synthesis of substituted benzo[d]pyrrolo[2ʹ,3ʹ:4,5]pyrrolo[1,2-a]imidazoles by 2-(1H-benzo[d]imidazol-2-yl)acetonitrile and arylglyoxals. MONATSHEFTE FUR CHEMIE 2022. [DOI: 10.1007/s00706-022-02968-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Geng Z, Zhang HY, Yin G, Zhang Y, Zhao J. A one-pot synthesis of benzimidazoles via aerobic oxidative condensation of benzyl alcohols with o-phenylenediamines catalyzed by [MIMPs]+Cl-/NaNO2/TEMPO. JOURNAL OF CHEMICAL RESEARCH 2020. [DOI: 10.1177/1747519820912163] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The ionic liquid 1-methyl-3-(3-sulfopropyl)imidazolium chloride ([MIMPs]+Cl-) in combination with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) and sodium nitrite (NaNO2) as a catalytic system demonstrates high efficiency in the one-pot two-step aerobic oxidative condensation of benzyl alcohols with 1,2-phenylenediamines to give benzimidazoles. Various benzimidazoles are obtained in good to excellent yields by this strategy.
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Affiliation(s)
- Zhenzhen Geng
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, P.R. China
| | - Hong-yu Zhang
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, P.R. China
| | - Guohui Yin
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, P.R. China
| | - Yuecheng Zhang
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, P.R. China
- Hebei Provincial Key Lab of Green Chemical Technology and High Efficient Energy Saving, Hebei University of Technology, Tianjin, P.R. China
| | - Jiquan Zhao
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, P.R. China
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Dascălu A, Bîcu E, Shova S, Lipka E, Rigo B, Billamboz M, Ghinet A. Insights on the Chemical Behavior of Ethyl Cyanoformate: Dipolarophile, Cyano or Ethoxycarbonyl Source. ChemistrySelect 2019. [DOI: 10.1002/slct.201903114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Anca‐Elena Dascălu
- Inserm U995, LIRICUniversité de Lille, CHRU de Lille, Faculté de médecine – Pôle recherche, Place Verdun F-59045 Lille Cedex France
- Hautes Etudes d'Ingénieur (HEI)Yncréa Hauts-de-France, UCLilleLaboratoire de Pharmacochimie, 13 rue de Toul F-59046 Lille France
- ‘Al. I. Cuza' University of IasiFaculty of Chemistry, Bd. Carol I, nr. 11 700506 Iasi Romania
| | - Elena Bîcu
- ‘Al. I. Cuza' University of IasiFaculty of Chemistry, Bd. Carol I, nr. 11 700506 Iasi Romania
| | - Segiu Shova
- ‘Petru Poni' Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley 700487 Iasi Romania
| | - Emmanuelle Lipka
- Inserm U995, LIRICUniversité de Lille, CHRU de Lille, Faculté de médecine – Pôle recherche, Place Verdun F-59045 Lille Cedex France
- Faculté des Sciences Pharmaceutiques et Biologiques de Lille F-59006 Lille Cedex France
| | - Benoît Rigo
- Inserm U995, LIRICUniversité de Lille, CHRU de Lille, Faculté de médecine – Pôle recherche, Place Verdun F-59045 Lille Cedex France
- Hautes Etudes d'Ingénieur (HEI)Yncréa Hauts-de-France, UCLilleLaboratoire de Pharmacochimie, 13 rue de Toul F-59046 Lille France
| | - Muriel Billamboz
- Inserm U995, LIRICUniversité de Lille, CHRU de Lille, Faculté de médecine – Pôle recherche, Place Verdun F-59045 Lille Cedex France
- Hautes Etudes d'Ingénieur (HEI)Yncréa Hauts-de-France, UCLilleLaboratoire de Pharmacochimie, 13 rue de Toul F-59046 Lille France
| | - Alina Ghinet
- Inserm U995, LIRICUniversité de Lille, CHRU de Lille, Faculté de médecine – Pôle recherche, Place Verdun F-59045 Lille Cedex France
- Hautes Etudes d'Ingénieur (HEI)Yncréa Hauts-de-France, UCLilleLaboratoire de Pharmacochimie, 13 rue de Toul F-59046 Lille France
- ‘Al. I. Cuza' University of IasiFaculty of Chemistry, Bd. Carol I, nr. 11 700506 Iasi Romania
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New Benzimidazole-1,2,4-Triazole Hybrid Compounds: Synthesis, Anticandidal Activity and Cytotoxicity Evaluation. Molecules 2017; 22:molecules22040507. [PMID: 28346364 PMCID: PMC6154534 DOI: 10.3390/molecules22040507] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 03/20/2017] [Accepted: 03/21/2017] [Indexed: 11/17/2022] Open
Abstract
Owing to the growing need for antifungal agents, we synthesized a new series 2-((5-(4-(5-substituted-1H-benzimidazol-2-yl)phenyl)-4-substituted-4H-1,2,4-triazol-3-yl)thio)-1-(substitutedphenyl)ethan-1-one derivatives, which were tested against Candida species. The synthesized compounds were characterized and elucidated by FT-IR, 1H-NMR, 13C-NMR and HR-MS spectroscopies. The synthesized compounds were screened in vitro anticandidal activity against Candida species by broth microdiluation methods. In vitro cytotoxic effects of the final compounds were determined by MTT assay. Microbiological studies revealed that compounds 5m, 5o, 5r, 5t, 5y, 5ab, and 5ad possess a good antifungal profile. Compounds 5w was the most active derivative and showed comparable antifungal activity to those of reference drugs ketoconazole and fluconazole. Cytotoxicity evaluation of compounds 5m, 5o, 5r, 5w, 5y, 5ab and 5ad showed that compounds 5w and 5ad were the least cytotoxic agents. Effects of these two compounds against ergosterol biosynthesis were observed by LC-MS-MS method, which is based on quantification of ergosterol level in C. albicans. Compounds 5w and 5d inhibited ergosterol biosynthesis concentration dependently. A fluorescence microscopy study was performed to visualize effect of compound 5w against C. albicans at cellular level. It was determined that compound 5w has a membrane damaging effect, which may be related with inhibition of biosynthesis of ergosterol.
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Vinodkumar S, Nakkeeran S, Renukadevi P, Malathi VG. Biocontrol Potentials of Antimicrobial Peptide Producing Bacillus Species: Multifaceted Antagonists for the Management of Stem Rot of Carnation Caused by Sclerotinia sclerotiorum. Front Microbiol 2017; 8:446. [PMID: 28392780 PMCID: PMC5364326 DOI: 10.3389/fmicb.2017.00446] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2017] [Accepted: 03/03/2017] [Indexed: 11/13/2022] Open
Abstract
Bacillus species are widely exploited as biocontrol agents because of their efficiency in impeding various plant pathogens with multifaceted approach. In this study, Bacillus species were isolated from rhizosphere of various plants viz., carnations, cotton, turmeric, and bananas in Tamil Nadu state of India. Their potential to control the mycelial growth of Sclerotinia sclerotiorum was assessed in vitro by dual plate and partition plate techniques. B. amyloliquefaciens strain VB7 was much effective in inhibiting mycelial growth (45% inhibition of over control) and sclerotial production (100%). PCR detection of AMP genes revealed that B. amyloliquefaciens (VB7) had a maximum of 10 diverse antibiotic biosynthesis genes, namely, ituD, ipa14, bacA, bacD, bamC, sfP, spaC, spaS, alba, and albF, that resulted in production of the antibiotics iturin, bacilysin, bacillomycin, surfactin, subtilin, and subtilosin. Further, metabolites from B. amyloliquefaciens strains VB2 and VB7, associated with inhibition of S. sclerotiorum, were identified as phenols and fatty acids by gas chromatography mass spectrometry (GC-MS). Delivery of bacterial suspension of the effective strains of Bacillus spp. as root dip was found promising for the management of stem rot of cultivated carnations. Minimal percent disease incidence (4.6%) and maximum plant growth promotion was observed in the plants treated with B. amyloliquefaciens (VB7).
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Affiliation(s)
- S Vinodkumar
- Department of Plant Pathology, Centre for Plant Protection, Tamil Nadu Agricultural University Coimbatore, India
| | - S Nakkeeran
- Department of Plant Pathology, Centre for Plant Protection, Tamil Nadu Agricultural University Coimbatore, India
| | - P Renukadevi
- Department of Plant Pathology, Centre for Plant Protection, Tamil Nadu Agricultural University Coimbatore, India
| | - V G Malathi
- Department of Plant Pathology, Centre for Plant Protection, Tamil Nadu Agricultural University Coimbatore, India
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Solvent-free 1,3-dipolar cycloaddition of azomethine imines with terminal alkynes promoted by calcium fluoride under the ball milling condition. Chem Res Chin Univ 2015. [DOI: 10.1007/s40242-015-4480-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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