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Olowe OM, Nicola L, Asemoloye MD, Akanmu AO, Sobowale AA, Babalola OO. Characterization and antagonistic potentials of selected rhizosphere Trichoderma species against some Fusarium species. Front Microbiol 2022; 13:985874. [PMID: 36262327 PMCID: PMC9574124 DOI: 10.3389/fmicb.2022.985874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 09/05/2022] [Indexed: 11/13/2022] Open
Abstract
Trichoderma fungi have been proved as efficient bioagents with great antifungal properties while many species in the plant’s rhizospheres have been characterized as plant growth-promoting agents. However, many rhizosphere Trichoderma are yet to be fully explored for plant disease management. In this study, Trichoderma species were isolated from the rhizosphere of maize, banana, and cassava, and their biocontrol potentials were screened against some Fusarium species from oak leaves (F2B and F3) and laboratory cultures (Fus 296 and Fus 294). The isolated rhizosphere Trichoderma were identified as Trichoderma virens 1 (TCIV), T. virens 2 (TCVII), T. virens 3 (TMSI), T. hazianum strain 1 (TCVI), T. harzianum strain 2 (TCVIII), T. erinaceum (TMZI), and T. koningiopsis (TMZII). The dual culture experiment recorded the highest percentage inhibition in TMZII against OakF2B (31.17%), TCVIII against Fus 294 (45.18%), TMZI against Fus 296 (47.37%), while TCIV was most effective against Oak F3 (44.15%). Among the Trichoderma culture filtrates evaluated, TCIV showed the highest percentage inhibition against Oak F3 (52.39%), Oak F2B (48.54%), Fus 294 (46.65%), and Fus 296 (44.48%). All the Trichoderma isolates demonstrated expressed varying levels of antagonism against the Fusarium pathogens in vitro.
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Affiliation(s)
- Olumayowa Mary Olowe
- Food Security and Safety Focus Area, Faculty of Natural and Agricultural Sciences, North-West University, Private Mail Bag, Mmabatho, South Africa
- Department of Earth and Environmental Sciences, Laboratory of Mycology, University of Pavia, Pavia, Italy
| | - Lidia Nicola
- Department of Earth and Environmental Sciences, Laboratory of Mycology, University of Pavia, Pavia, Italy
| | | | - Akinlolu Olalekan Akanmu
- Food Security and Safety Focus Area, Faculty of Natural and Agricultural Sciences, North-West University, Private Mail Bag, Mmabatho, South Africa
| | | | - Olubukola Oluranti Babalola
- Food Security and Safety Focus Area, Faculty of Natural and Agricultural Sciences, North-West University, Private Mail Bag, Mmabatho, South Africa
- *Correspondence: Olubukola Oluranti Babalola,
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Huang Y, Zhang X, Xu H, Zhang F, Zhang X, Yan Y, He L, Liu J. Isolation of lipopeptide antibiotics from Bacillus siamensis: A potential biocontrol agent for Fusarium graminearum. Can J Microbiol 2022; 68:403-411. [PMID: 35171710 DOI: 10.1139/cjm-2021-0312] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Fusarium head blight (FHB), a destructive fungal disease that can cause damage to various crops and reduce yield and quality, is primarily caused by several species of the soil-borne fungal genus Fusarium, which produce mycotoxins that contaminate grain and may cause various severe chronic diseases in humans and livestock. In recent years, Bacillus spp. have been reported as good producer of antifungal antibiotics against FHB. This study aimed to explore the potential role of a newly identified Bacillus strain, designated as CU-XJ-9, against FHB. This strain, which was isolated from traditional Chinese fermented food, was identified as Bacillus siamensis and confirmed to produce lipopeptide biosurfactants, which according to the analysis by quadrupole time-of-flight tandem mass spectrometry (Q-TOF-MS/MS) may belong to the iturin lipopeptide family. The isolated antifungal compounds, at 100 μg/mL, completely inhibited the germination of conidia. Observation of the effects of the isolated antifungal compounds on the mycelia of F. graminearum by scanning electron microscopy revealed obvious nodes in the middle of the mycelia and destroyed mycelial structures, and these changes became more pronounced with increasing dose. Overall, this study provides important information about the ability of Bacillus siamensis to produce lipopeptide biosurfactants, which showed significant antagonistic activity against F. graminearum.
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Affiliation(s)
- Yanhong Huang
- Shandong Food Ferment Industry Research & Design Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China;
| | - Xingrong Zhang
- Shandong Food Ferment Industry Research & Design Institute, Qilu University of Technology (Shandong Academy of Sciences), jinan, China;
| | - Hui Xu
- Shandong Food Ferment Industry Research & Design Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China;
| | - Fan Zhang
- College of Life Sciences, ShanDong normal University, Jinan, Shandong, China;
| | - Xuelin Zhang
- Shandong Food Ferment Industry Research & Design Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China;
| | - Yongheng Yan
- Shandong Food Ferment Industry Research & Design Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China;
| | - Lianzhi He
- Shandong Food Ferment Industry Research & Design Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China;
| | - Jianjun Liu
- Shandong Food Ferment Industry Research & Design Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China;
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Transmitting silks of maize have a complex and dynamic microbiome. Sci Rep 2021; 11:13215. [PMID: 34168223 PMCID: PMC8225909 DOI: 10.1038/s41598-021-92648-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 06/14/2021] [Indexed: 12/21/2022] Open
Abstract
In corn/maize, silks emerging from cobs capture pollen, and transmit resident sperm nuclei to eggs. There are > 20 million silks per U.S. maize acre. Fungal pathogens invade developing grain using silk channels, including Fusarium graminearum (Fg, temperate environments) and devastating carcinogen-producers (Africa/tropics). Fg contaminates cereal grains with mycotoxins, in particular Deoxynivalenol (DON), known for adverse health effects on humans and livestock. Fitness selection should promote defensive/healthy silks. Here, we report that maize silks, known as styles in other plants, possess complex and dynamic microbiomes at the critical pollen-fungal transmission interval (henceforth: transmitting style microbiome, TSM). Diverse maize genotypes were field-grown in two trial years. MiSeq 16S rRNA gene sequencing of 328 open-pollinated silk samples (healthy/Fg-infected) revealed that the TSM contains > 5000 taxa spanning the prokaryotic tree of life (47 phyla/1300 genera), including nitrogen-fixers. The TSM of silk tip tissue displayed seasonal responsiveness, but possessed a reproducible core of 7–11 MiSeq-amplicon sequence variants (ASVs) dominated by a single Pantoea MiSeq-taxon (15–26% of sequence-counts). Fg-infection collapsed TSM diversity and disturbed predicted metabolic functionality, but doubled overall microbiome size/counts, primarily by elevating 7–25 MiSeq-ASVs, suggestive of a selective microbiome response against infection. This study establishes the maize silk as a model for fundamental/applied research of plant reproductive microbiomes.
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Adeniji AA, Ayangbenro AS, Babalola OO. Genomic Exploration of Bacillus thuringiensis MORWBS1.1, Candidate Biocontrol Agent, Predicts Genes for Biosynthesis of Zwittermicin, 4,5-DOPA Dioxygenase Extradiol, and Quercetin 2,3-Dioxygenase. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2021; 34:602-605. [PMID: 33555220 DOI: 10.1094/mpmi-10-20-0272-sc] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Many strains from Bacillus thuringiensis are known for their genomic robustness and antimicrobial potentials. As a result, the quest for their biotechnological applications, especially in the agroindustry (e.g., as biopesticides), has increased over the years. This study documents the genome sequencing and probing of a Fusarium antagonist (B. thuringiensis strain MORWBS1.1) with possible biopesticidal metabolite producing capacity from South Africa. Based on in vitro evaluation and in silico antiSMASH investigation, B. thuringiensis strain MORWBS1.1 exhibited distinctive genomic properties that could be further exploited for in planta and food additive production purposes.[Formula: see text] Copyright © 2021 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.
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Affiliation(s)
- Adetomiwa A Adeniji
- Human Metabolomics, Faculty of Natural and Agricultural Science, North-West University, Private Bag X6001, Box 269, Potchefstroom, 2531, South Africa
- Food Security and Safety Niche Area, Faculty of Natural and Agricultural Science, North-West University, Private Bag X2046, Mmabatho 2735, South Africa
| | - Ayansina S Ayangbenro
- Food Security and Safety Niche Area, Faculty of Natural and Agricultural Science, North-West University, Private Bag X2046, Mmabatho 2735, South Africa
| | - Olubukola O Babalola
- Food Security and Safety Niche Area, Faculty of Natural and Agricultural Science, North-West University, Private Bag X2046, Mmabatho 2735, South Africa
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Adeniji AA, Ayangbenro AS, Loots DT. Genome Sequence Resource of Pseudomonas fulva HARBPS9.1-Candidate Biocontrol Agent. PHYTOPATHOLOGY 2021; 111:896-898. [PMID: 33258413 DOI: 10.1094/phyto-10-20-0478-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The genus Pseudomonas contains a variety of genomic robust strains and species, well known for their beneficial use in a variety of applications, hence the vast amount of research done on this organism to date. We report here the draft genome sequence of an anti-Fusarium rhizospheric Pseudomonas fulva HARBPS9.1 strain from South Africa. This genome analysis identified clusters of genes responsible for the synthesis of pyoverdin and rhizomide in HARBPS9.1; these compounds should confer a competitive advantage on the pseudomonad.
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Affiliation(s)
- Adetomiwa A Adeniji
- Human Metabolomics, Faculty of Natural and Agricultural Science, North-West University, Private Bag X6001, Box 269, Potchefstroom, 2531, South Africa
| | - Ayansina S Ayangbenro
- Food Security and Safety Niche Area, Faculty of Natural and Agricultural Science, North-West University, Private Bag X2046, Mmabatho 2735, South Africa
| | - Du Toit Loots
- Human Metabolomics, Faculty of Natural and Agricultural Science, North-West University, Private Bag X6001, Box 269, Potchefstroom, 2531, South Africa
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Akanmu AO, Babalola OO, Venturi V, Ayilara MS, Adeleke BS, Amoo AE, Sobowale AA, Fadiji AE, Glick BR. Plant Disease Management: Leveraging on the Plant-Microbe-Soil Interface in the Biorational Use of Organic Amendments. FRONTIERS IN PLANT SCIENCE 2021; 12:700507. [PMID: 34394153 PMCID: PMC8360880 DOI: 10.3389/fpls.2021.700507] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 07/07/2021] [Indexed: 05/04/2023]
Abstract
Agriculture is faced with many challenges including loss of biodiversity, chemical contamination of soils, and plant pests and diseases, all of which can directly compromise plant productivity and health. In addition, inadequate agricultural practices which characterize conventional farming play a contributory role in the disruption of the plant-microbe and soil-plant interactions. This review discusses the role of organic amendments in the restoration of soil health and plant disease management. While the use of organic amendments in agriculture is not new, there is a lack of knowledge regarding its safe and proper deployment. Hence, a biorational approach of organic amendment use to achieve sustainable agricultural practices entails the deployment of botanicals, microbial pesticides, and organic minerals as organic amendments for attaining plant fitness and disease suppression. Here, the focus is on the rhizosphere microbial communities. The role of organic amendments in stimulating beneficial microbe quorum formation related to the host-plant-pathogen interactions, and its role in facilitating induced systemic resistance and systemic-acquired resistance against diseases was evaluated. Organic amendments serve as soil conditioners, and their mechanism of action needs to be further elaborated to ensure food safety.
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Affiliation(s)
- Akinlolu Olalekan Akanmu
- Food Security and Safety Niche, Faculty of Natural and Agricultural Sciences, North-West University, Mmabatho, South Africa
| | - Olubukola Oluranti Babalola
- Food Security and Safety Niche, Faculty of Natural and Agricultural Sciences, North-West University, Mmabatho, South Africa
- *Correspondence: Olubukola Oluranti Babalola,
| | - Vittorio Venturi
- Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Area Science Park, Trieste, Italy
| | - Modupe Stella Ayilara
- Food Security and Safety Niche, Faculty of Natural and Agricultural Sciences, North-West University, Mmabatho, South Africa
| | - Bartholomew Saanu Adeleke
- Food Security and Safety Niche, Faculty of Natural and Agricultural Sciences, North-West University, Mmabatho, South Africa
| | - Adenike Eunice Amoo
- Food Security and Safety Niche, Faculty of Natural and Agricultural Sciences, North-West University, Mmabatho, South Africa
| | | | - Ayomide Emmanuel Fadiji
- Food Security and Safety Niche, Faculty of Natural and Agricultural Sciences, North-West University, Mmabatho, South Africa
| | - Bernard R. Glick
- Department of Biology, University of Waterloo, Waterloo, ON, Canada
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Abouelkheir SS, Kamara MS, Atia SM, Amer SA, Youssef MI, Abdelkawy RS, Khattab SN, Sabry SA. Novel research on nanocellulose production by a marine Bacillus velezensis strain SMR: a comparative study. Sci Rep 2020; 10:14202. [PMID: 32848161 PMCID: PMC7450066 DOI: 10.1038/s41598-020-70857-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 07/15/2020] [Indexed: 12/14/2022] Open
Abstract
Bacterial nanocellulose (BNC) is a nanofibrillar polymer that possesses unique characteristics such as high chemical purity, mechanical strength, flexibility, and absorbency. In addition, different bacterial strains can form nanocellulose (NC) in multiple shapes and sizes. This study describes the first report of a marine Bacillus strain that is able to synthesize NC. The strain identified as B. velezensis SMR based on 16S rDNA sequencing, produced highly structured NC, as confirmed by X-ray diffraction (XRD) and Scanning Electron Microscopic Analysis (SEM). In Hestrin-Schramm (HS) medium, B. velezensis SMR produced twice the quantity of BNC in comparison to the reference strain, G. xylinus ATCC 10245. The ability of B. velezensis SMR to produce NC using different industrial waste materials as growth media was tested. Growth in Ulva seaweed extract supported a 2.5-fold increase of NC production by B. velezensis SMR and a threefold increase in NC production by G. xylinus ATCC 10245. As proof of principle for the usability of NC from B. velezensis SMR, we successfully fabricated a BNC-based polyvinyl alcohol hydrogel (BNC-PVA) system, a promising material used in different fields of application such as medicine, food, and agriculture.
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Affiliation(s)
- Samia S Abouelkheir
- Marine Microbiology Laboratory, Marine Environment Division, National Institute of Oceanography and Fisheries (NIOF), Kayet Bay, El-Anfushy, Alexandria, Egypt.
| | - Marwa S Kamara
- Industrial Microbiology and Applied Chemistry (IMAC) Program, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Salma M Atia
- Industrial Microbiology and Applied Chemistry (IMAC) Program, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Sara A Amer
- Industrial Microbiology and Applied Chemistry (IMAC) Program, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Marina I Youssef
- Industrial Microbiology and Applied Chemistry (IMAC) Program, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Rana S Abdelkawy
- Industrial Microbiology and Applied Chemistry (IMAC) Program, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Sherine N Khattab
- Department of Chemistry, Faculty of Science, Alexandria University, Alexandria, 21321, Egypt
| | - Soraya A Sabry
- Botany and Microbiology Department, Faculty of Science, Alexandria University, Alexandria, 21321, Egypt
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Adeniji AA, Loots DT, Babalola OO. Bacillus velezensis: phylogeny, useful applications, and avenues for exploitation. Appl Microbiol Biotechnol 2019; 103:3669-3682. [PMID: 30911788 DOI: 10.1007/s00253-019-09710-5] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 02/21/2019] [Accepted: 02/22/2019] [Indexed: 02/06/2023]
Abstract
Some members of the Bacillus velezensis (Bv) group (e.g., Bv FZB42T and AS3.43) were previously assigned grouping with B. subtilis and B. amyloliquefaciens, based on the fact that they shared a 99% DNA-DNA percentage phylogenetic similarity. However, hinging on current assessments of the pan-genomic reassignments, the differing phylogenomic characteristics of Bv from B. subtilis and B. amyloliquefaciens are now better understood. Within this re-grouping/reassignment, the various strains within the Bv share a close phylogenomic resemblance, and a number of these strains have received a lot of attention in recent years, due to their genomic robustness, and the growing evidence for their possible utilization in the agricultural industry for managing plant diseases. Only a few applications for their use medicinally/pharmaceutically, environmentally, and in the food industry have been reported, and this may be due to the fact that the majority of those strains investigated are those typically occurring in soil. Although the intracellular unique biomolecules of Bv strains have been revealed via in silico genome modeling and investigated using transcriptomics and proteomics, a further inquisition into the Bv metabolome using newer technologies such as metabolomics could elucidate additional applications of this economically relevant Bacillus species, beyond that of primarily the agricultural sector.
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Affiliation(s)
- Adetomiwa Ayodele Adeniji
- Faculty of Natural and Agricultural Science, North-West University, Food Security and Safety, Private Bag X2046, Mmabatho, 2735, South Africa.,Faculty of Natural and Agricultural Science, North-West University, Human Metabolomics Private Bag X6001, Box 269, Potchefstroom, 2531, South Africa
| | - Du Toit Loots
- Faculty of Natural and Agricultural Science, North-West University, Human Metabolomics Private Bag X6001, Box 269, Potchefstroom, 2531, South Africa
| | - Olubukola Oluranti Babalola
- Faculty of Natural and Agricultural Science, North-West University, Food Security and Safety, Private Bag X2046, Mmabatho, 2735, South Africa.
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Adeniji AA, Aremu OS, Babalola OO. Selecting lipopeptide-producing, Fusarium-suppressing Bacillus spp.: Metabolomic and genomic probing of Bacillus velezensis NWUMFkBS10.5. Microbiologyopen 2018; 8:e00742. [PMID: 30358165 PMCID: PMC6562122 DOI: 10.1002/mbo3.742] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 09/03/2018] [Accepted: 09/10/2018] [Indexed: 12/29/2022] Open
Abstract
The results of this study indicate that the maize rhizosphere remains a reservoir for microbial strains with unique beneficial properties. The study sought to provide an indigenous Bacillus strain with a bioprotective potential to alleviate maize fusariosis in South Africa. We selected seven Bacillus isolates (MORWBS1.1, MARBS2.7, VERBS5.5, MOREBS6.3, MOLBS8.5, MOLBS8.6, and NWUMFkBS10.5) with biosuppressive effects against two maize fungal pathogens (Fusarium graminearum and Fusarium culmorum) based on 16S rDNA gene characterization and lipopeptide gene analysis. The PCR analysis revealed that lipopeptide genes encoding the synthesis of iturin, surfactin, and fengycin might be responsible for their antifungal activities. Few of the isolates also showed possible biosurfactant capability, and their susceptibility to known antibiotics is indicative of their eco‐friendly attributes. In addition, in silico genomic analysis of our best isolate (Bacillus velezensis NWUMFkBS10.5) and characterization of its active metabolite with FTIR, NMR, and ESI‐Micro‐Tof MS confirmed the presence of valuable genes clusters and metabolic pathways. The versatile genomic potential of our Bacillus isolate emphasizes the continued relevance of Bacillus spp. in biological management of plant diseases.
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Affiliation(s)
- Adetomiwa Ayodele Adeniji
- Department of Biological Sciences, Faculty of Natural and Agriculture Science, North-West University, Mmabatho, South Africa.,Food Security and Safety Niche Area, Faculty of Natural and Agriculture Science, North-West University, Mmabatho, South Africa
| | - Oluwole Samuel Aremu
- Department of Chemistry, Faculty of Natural and Agriculture Science, North-West University, Mmabatho, South Africa
| | - Olubukola Oluranti Babalola
- Department of Biological Sciences, Faculty of Natural and Agriculture Science, North-West University, Mmabatho, South Africa.,Food Security and Safety Niche Area, Faculty of Natural and Agriculture Science, North-West University, Mmabatho, South Africa
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