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Ezeobiora CE, Igbokwe NH, Amin DH, Okpalanwa CF, Stephen CM, Mendie UE. Phylogenetic insights and antimicrobial biosynthetic potential of Serratia sp. XAFb12 and Pseudomonas sp. XAFb13 from Xylopia aethiopica. Braz J Microbiol 2024; 55:201-213. [PMID: 38099979 PMCID: PMC10920518 DOI: 10.1007/s42770-023-01213-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Accepted: 12/08/2023] [Indexed: 03/09/2024] Open
Abstract
The extensive distribution of Xylopia aethiopica across the continent of Africa has firmly established its medicinal value in diverse disease management. While its phytochemistry is well established, the diversity, molecular, biochemical, and antimicrobial-biosynthetic characterizations of culturable bacterial endophytes residing in fruits of X. aethiopica have not been studied previously. Additionally, danger continues to loom the global health care and management due to antibiotic resistance; hence, the discovery of microbial natural products especially from endophytes could offer a lasting solution to the quest for novel antimicrobial compounds. In this study, we isolated two bacterial endophytes Serratia sp. XAFb12 and Pseudomonas sp. XAFb13 from fresh X. aethiopica fruit. The 16S rRNA gene sequencing, Vitex biochemical test, Gram staining, and 16S rRNA gene analysis were used to confirm their phenotypic and genotypic profiles. Phylogenetic tree analysis reveals their divergence in a separate branch, indicating their uniqueness. The crude extract of both strains showed inhibition against all tested bacterial and fungal pathogens. The minimum inhibition concentration (MIC) ranged from 2.5 to 10%. Chemical analysis of the crude extracts using gas chromatography-mass spectroscopy (GC-MS) revealed the most abundant compounds to be hydrocinnamic acid, 2-piperidinone, 5-isopropylidene-3,3-dimethyl-dihydrofuran-2-one, and diethyl trisulfide. The bacterial endophytes linked to X. aethiopica were described in this study for the first time in relation to clinically significant pathogens. Our findings imply that crude extracts of the endophytic bacteria from X. aethiopica could be potentially employed as antibiotics. Hence, it is crucial to characterize the active ingredient in further detail for future pharmaceutical applications.
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Affiliation(s)
- Chijioke E Ezeobiora
- Department of Pharmaceutical Microbiology and Biotechnology, Faculty of Pharmacy, University of Lagos, Lagos, Nigeria.
| | - Nwamaka H Igbokwe
- Department of Pharmaceutical Microbiology and Biotechnology, Faculty of Pharmacy, University of Lagos, Lagos, Nigeria
| | - Dina H Amin
- Department of Microbiology, Faculty of Science, Ain Shams University, Cairo, Egypt
| | - Chiamaka F Okpalanwa
- Department of Pharmaceutical Microbiology and Biotechnology, Faculty of Pharmacy, University of Nigeria, Nsukka, Nigeria
| | - Chabula M Stephen
- Department of Pharmaceutical Microbiology and Biotechnology, Faculty of Pharmacy, University of Maiduguri, Borno State, Maiduguri, Nigeria
| | - Udoma E Mendie
- Department of Pharmaceutical Microbiology and Biotechnology, Faculty of Pharmacy, University of Lagos, Lagos, Nigeria
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Yang WT, Yi YJ, Xia B. Unveiling the duality of Pantoea dispersa: A mini review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 873:162320. [PMID: 36801414 DOI: 10.1016/j.scitotenv.2023.162320] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 02/14/2023] [Accepted: 02/14/2023] [Indexed: 06/18/2023]
Abstract
Pantoea dispersa is a Gram-negative bacterium that exists in a variety of environments and has potential in many commercial and agricultural applications, such as biotechnology, environmental protection, soil bioremediation, and plant growth stimulation. However, P. dispersa is also a harmful pathogen to both humans and plants. This "double-edged sword" phenomenon is not uncommon in nature. To ensure survival, microorganisms respond to both environmental and biological stimuli, which could be beneficial or detrimental to other species. Therefore, to harness the full potential of P. dispersa, while minimizing potential harm, it is imperative to unravel its genetic makeup, understand its ecological interactions and underlying mechanisms. This review aims to provide a comprehensive and up-to-date overview of the genetic and biological characteristics of P. dispersa, in addition to potential impacts on plants and humans, as well as to provide insights into potential applications.
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Affiliation(s)
- Wen-Tao Yang
- College of Food Science and Technology, Hunan Agricultural University, East Renmin Road, Changsha 410128, Hunan, China
| | - You-Jin Yi
- College of Food Science and Technology, Hunan Agricultural University, East Renmin Road, Changsha 410128, Hunan, China
| | - Bo Xia
- College of Food Science and Technology, Hunan Agricultural University, East Renmin Road, Changsha 410128, Hunan, China.
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Chen T, Zhang Z, Li W, Chen J, Chen X, Wang B, Ma J, Dai Y, Ding H, Wang W, Long Y. Biocontrol potential of Bacillus subtilis CTXW 7-6-2 against kiwifruit soft rot pathogens revealed by whole-genome sequencing and biochemical characterisation. Front Microbiol 2022; 13:1069109. [PMID: 36532498 PMCID: PMC9751376 DOI: 10.3389/fmicb.2022.1069109] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 11/14/2022] [Indexed: 09/05/2023] Open
Abstract
Soft rot causes significant economic losses in the kiwifruit industry. This study isolated strain CTXW 7-6-2 from healthy kiwifruit tissue; this was a gram-positive bacterium that produced the red pigment pulcherrimin. The phylogenetic tree based on 16S ribosomal RNA, gyrA, rpoB, and purH gene sequences identified CTXW 7-6-2 as a strain of Bacillus subtilis. CTXW 7-6-2 inhibited hyphal growth of pathogenic fungi that cause kiwifruit soft rot, namely, Botryosphaeria dothidea, Phomopsis sp., and Alternaria alternata, by 81.76, 69.80, and 32.03%, respectively. CTXW 7-6-2 caused the hyphal surface to become swollen and deformed. Volatile compounds (VOC) produced by the strain inhibited the growth of A. alternata and Phomopsis sp. by 65.74 and 54.78%, respectively. Whole-genome sequencing revealed that CTXW 7-6-2 possessed a single circular chromosome of 4,221,676 bp that contained 4,428 protein-coding genes, with a guanine and cytosine (GC) content of 43.41%. Gene functions were annotated using the National Center for Biotechnology Information (NCBI) non-redundant protein, Swiss-Prot, Kyoto Encyclopedia of Genes and Genomes, Clusters of Orthologous Groups of proteins, Gene Ontology, Pathogen-Host Interactions, Carbohydrate-Active enZYmes, and Rapid Annotations using Subsystem Technology databases, revealing non-ribosomal pathways associated with antifungal mechanisms, biofilm formation, chemotactic motility, VOC 3-hydroxy-2-butanone, cell wall-associated enzymes, and synthesis of various secondary metabolites. antiSMASH analysis predicted that CTXW 7-6-2 can produce the active substances bacillaene, bacillibactin, subtilosin A, bacilysin, and luminmide and has four gene clusters of unknown function. Quantitative real-time PCR (qRT-PCR) analysis verified that yvmC and cypX, key genes involved in the production of pulcherrimin, were highly expressed in CTXW 7-6-2. This study elucidates the mechanism by which B. subtilis strain CTXW 7-6-2 inhibits pathogenic fungi that cause kiwifruit soft rot, suggesting the benefit of further studying its antifungal active substances.
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Affiliation(s)
- Tingting Chen
- Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Institute of Crop Protection, Guizhou University, Guiyang, China
| | - Zhuzhu Zhang
- Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Institute of Crop Protection, Guizhou University, Guiyang, China
| | - Wenzhi Li
- Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Institute of Crop Protection, Guizhou University, Guiyang, China
| | - Jia Chen
- Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Institute of Crop Protection, Guizhou University, Guiyang, China
| | - Xuetang Chen
- Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Institute of Crop Protection, Guizhou University, Guiyang, China
| | - Bince Wang
- Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Institute of Crop Protection, Guizhou University, Guiyang, China
| | - Jiling Ma
- Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Institute of Crop Protection, Guizhou University, Guiyang, China
| | - Yunyun Dai
- Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Institute of Crop Protection, Guizhou University, Guiyang, China
| | - Haixia Ding
- Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Institute of Crop Protection, Guizhou University, Guiyang, China
- Department of Plant Pathology, Guizhou University, Guiyang, China
| | - Weizhen Wang
- Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Institute of Crop Protection, Guizhou University, Guiyang, China
| | - Youhua Long
- Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Institute of Crop Protection, Guizhou University, Guiyang, China
- Teaching Experimental Factory, Guizhou University, Guiyang, China
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Kandasamy GD, Kathirvel P. Insights into bacterial endophytic diversity and isolation with a focus on their potential applications –A review. Microbiol Res 2022; 266:127256. [DOI: 10.1016/j.micres.2022.127256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 11/02/2022] [Accepted: 11/06/2022] [Indexed: 11/14/2022]
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Isolation and characterization culturable microbes on the surface of ‘Granny Smith’ apples treated with electrolyzed water during cold storage. Food Sci Biotechnol 2022; 31:1603-1614. [PMID: 36278131 PMCID: PMC9582106 DOI: 10.1007/s10068-022-01148-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 07/08/2022] [Accepted: 07/22/2022] [Indexed: 11/04/2022] Open
Abstract
Response of culturable microbes on the surface of apples treated with slightly alkaline electrolyzed water (SAIEW) is largely unexplored. Thus, the aim of this study was to characterize culturable microbes on the surface of SAIEW treated 'Granny Smith' apples using conventional and molecular approach. Results showed that SAIEW treatments and storage duration influenced culturable microbes isolated from the surface of 'Granny Smith' apples stored at 5 °C for 21 days. Enterobacterial repetitive intergenic consensus (ERIC-PCR) analysis distinctively identified 27 groups of bacteria from 56 plate isolates. Using random amplified polymorphic DNA (RAPD-PCR) typing and RAPD1283 primers, 10 distinct band patterns were identified from 30 fungal isolates. Sequencing of 16S rRNA and intergenic spacer (ITS1 and ITS4) region, identified eight bacteria and four fungi, respectively, to species level. Study showed that SAIEW treatment inhibited growth of Staphylococcus epidermidis, S. capitis, Ochrobactrum soli, and Aspergillus inuii on the surface apples during storage. Graphical abstract Supplementary Information The online version contains supplementary material available at 10.1007/s10068-022-01148-2.
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Kalaipandian S, Mu Z, Kong EYY, Biddle J, Cave R, Bazrafshan A, Wijayabandara K, Beveridge FC, Nguyen Q, Adkins SW. Cloning Coconut via Somatic Embryogenesis: A Review of the Current Status and Future Prospects. PLANTS (BASEL, SWITZERLAND) 2021; 10:2050. [PMID: 34685859 PMCID: PMC8538321 DOI: 10.3390/plants10102050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 09/17/2021] [Accepted: 09/17/2021] [Indexed: 11/30/2022]
Abstract
Coconut [Cocos nucifera L.] is often called "the tree of life" because of its many uses in the food, beverage, medicinal, and cosmetic industries. Currently, more than 50% of the palms grown throughout the world are senile and need to be replanted immediately to ensure production levels meet the present and increasing demand for coconut products. Mass replanting will not be possible using traditional propagation methods from seed. Recent studies have indicated that in vitro cloning via somatic embryogenesis is the most promising alternative for the large-scale production of new coconut palms. This paper provides a review on the status and prospects for the application of somatic embryogenesis to mass clonal propagation of coconut.
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Affiliation(s)
- Sundaravelpandian Kalaipandian
- School of Agriculture and Food Sciences, The University of Queensland, Gatton, QLD 4343, Australia; (Z.M.); (E.Y.Y.K.); (J.B.); (R.C.); (A.B.); (K.W.); (F.C.B.); (S.W.A.)
| | - Zhihua Mu
- School of Agriculture and Food Sciences, The University of Queensland, Gatton, QLD 4343, Australia; (Z.M.); (E.Y.Y.K.); (J.B.); (R.C.); (A.B.); (K.W.); (F.C.B.); (S.W.A.)
| | - Eveline Yee Yan Kong
- School of Agriculture and Food Sciences, The University of Queensland, Gatton, QLD 4343, Australia; (Z.M.); (E.Y.Y.K.); (J.B.); (R.C.); (A.B.); (K.W.); (F.C.B.); (S.W.A.)
| | - Julianne Biddle
- School of Agriculture and Food Sciences, The University of Queensland, Gatton, QLD 4343, Australia; (Z.M.); (E.Y.Y.K.); (J.B.); (R.C.); (A.B.); (K.W.); (F.C.B.); (S.W.A.)
- Australian Centre for International Agricultural Research, Canberra, ACT 2617, Australia
| | - Robyn Cave
- School of Agriculture and Food Sciences, The University of Queensland, Gatton, QLD 4343, Australia; (Z.M.); (E.Y.Y.K.); (J.B.); (R.C.); (A.B.); (K.W.); (F.C.B.); (S.W.A.)
| | - Amirhossein Bazrafshan
- School of Agriculture and Food Sciences, The University of Queensland, Gatton, QLD 4343, Australia; (Z.M.); (E.Y.Y.K.); (J.B.); (R.C.); (A.B.); (K.W.); (F.C.B.); (S.W.A.)
| | - Kusinara Wijayabandara
- School of Agriculture and Food Sciences, The University of Queensland, Gatton, QLD 4343, Australia; (Z.M.); (E.Y.Y.K.); (J.B.); (R.C.); (A.B.); (K.W.); (F.C.B.); (S.W.A.)
| | - Fernanda Caro Beveridge
- School of Agriculture and Food Sciences, The University of Queensland, Gatton, QLD 4343, Australia; (Z.M.); (E.Y.Y.K.); (J.B.); (R.C.); (A.B.); (K.W.); (F.C.B.); (S.W.A.)
| | - Quang Nguyen
- Applied Biotechnology for Crop Development Research Unit, The International University, Ho Chi Minh City 700000, Vietnam;
| | - Steve W. Adkins
- School of Agriculture and Food Sciences, The University of Queensland, Gatton, QLD 4343, Australia; (Z.M.); (E.Y.Y.K.); (J.B.); (R.C.); (A.B.); (K.W.); (F.C.B.); (S.W.A.)
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Onajobi IB, Idowu EO, Adeyemi JO, Samson OJ, Ogunyinka PI, Fagade OE. In vitro antibacterial activities and molecular characterization of bacterial species isolated from farmlands against selected pathogens. BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2020; 27:e00513. [PMID: 32923377 PMCID: PMC7475235 DOI: 10.1016/j.btre.2020.e00513] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 06/09/2020] [Accepted: 07/31/2020] [Indexed: 04/12/2023]
Abstract
This study aims to screen bacterial isolates from Olabisi Onabanjo University Farmland for antibacterial activity against pathogenic microorganisms. Agar well diffusion method was used. Isolates were identified molecularly. Chi-square test revealed significant association between isolates, antibacterial activity with likelihood p-value = 0.000 and 5% significant level. Six among thirty-five isolates exhibited antibacterial activity against the test pathogenic species. A greater antibacterial activity (50 % inhibition) was observed in Lysinibacillus sphearicus strain PRE16. It inhibited the growth of Bacillus subtilis, Staphylococcus aureus and Escherichia coli by 23.00 ± 2.00, 18.00 ± 2.00 and 20.00 ± 4.00 respectively. DNA sequencing revealed antagonist isolates as Bacillus sp. BCN2, Brochothrix thermosphacta strain P30C4, Bacillus aryabhattai strain KNUC205, Alcaligenes faecalis strain KEM24, Bacillus arsenicus strain CSD05 and Lysinibacillus sphaericus strain PRE16. Phylogenetic analysis revealed close relatedness of most isolates with Bacillus species strains. These strains are suggested to be effective for the discovery of new antibacterial agents.
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Affiliation(s)
- Ismail B. Onajobi
- Department of Microbiology, Faculty of Science, Olabisi Onabanjo University, Ago-Iwoye, Ogun State, Nigeria
| | - Esther O. Idowu
- Department of Microbiology, Faculty of Science, Olabisi Onabanjo University, Ago-Iwoye, Ogun State, Nigeria
| | - Jamiu O. Adeyemi
- Department of Microbiology, Faculty of Science, Olabisi Onabanjo University, Ago-Iwoye, Ogun State, Nigeria
| | - Oyindamola J. Samson
- Department of Microbiology, Faculty of Science, Olabisi Onabanjo University, Ago-Iwoye, Ogun State, Nigeria
| | - Peter I. Ogunyinka
- Department of Mathematical Sciences, Faculty of Science, Olabisi Onabanjo University, Ago-Iwoye, Ogun State, Nigeria
| | - Obasola E. Fagade
- Department of Microbiology, Faculty of Science, University of Ibadan, Nigeria
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