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Mandodan S, Gangmei K, Vijayakumar A, Kunnikuruvan A, Lukose J, Padmanaban H, Bora B, Ashokkumar M, Irudayaraj G, Subbiah P. Molecular identification and GC-MS analysis of a newly isolated novel bacterium (Lysinibacillus sp. VCRC B655) for mosquito control. Mol Biol Rep 2024; 51:800. [PMID: 39001994 DOI: 10.1007/s11033-024-09734-9] [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: 05/07/2024] [Accepted: 06/17/2024] [Indexed: 07/15/2024]
Abstract
BACKGROUND Mosquitoes are widespread globally and have contributed to transmitting pathogens to humans and the burden of vector-borne diseases. They are effectively controlled at their larval stages by biocontrol agents. Unravelling natural sources for microbial agents can lead us to novel potential candidates for managing mosquito-borne diseases. In the present study, an attempt was made to isolate a novel bacterium from the field-collected agricultural soil for larvicidal activity and promising bacterial metabolites for human healthcare. METHODS AND RESULTS Field-collected soil samples from the Union territory of Puducherry, India, have been used as the source of bacteria. Isolate VCRC B655 belonging to the genus Lysinibacillus was identified by 16S rRNA gene sequencing and exhibited promising larvicidal activity against different mosquito species, including Culex (Cx.) quinquefasciatus, Anopheles (An.) stephensi, and Aedes (Ae.) aegypti. The lethal concentration (LC) of Lysinibacillus sp. VCRCB655 was observed to be high for Cx. quiquefasciatus: LC50 at 0.047 mg/l, LC90 at 0.086 mg/l, followed by An. stephensi and Ae. aegypti (LC50: 0.6952 mg/l and 0.795 mg/l) respectively. Additionally, metabolic profiling of the culture supernatant was carried out through Gas chromatography and Mass spectrophotometry (GC/MS) and identified 15 major secondary metabolites of different metabolic classes. Diketopiperazine (DKPs), notably pyro lo [1, 2-a] pyrazine1, 4-dione, are the abundant compounds reported for antioxidant activity, and an insecticide compound benzeneacetic acid was also identified. CONCLUSIONS A new bacterial isolate, Lysinibacillus sp. VCRC B655 has been identified with significant larvicidal activity against mosquito larvae with no observed in non-target organisms. GC-MS analysis revealed diverse bioactive compounds with substantial biological applications. In conclusion, Lysinibacillus sp. VCRC B655 showed promise as an alternative biocontrol agent for mosquito vector control, with additional biological applications further enhancing its significance.
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Affiliation(s)
- Sahadiya Mandodan
- Unit of Microbiology and Immunology (UMI), Department of Health Research (Ministry of Health & Family Welfare, Govt. of India), ICMR-Vector Control Research Centre (VCRC), Medical Complex Indira Nagar, Puducherry, 605006, India
| | - Kakhuangailiu Gangmei
- Unit of Microbiology and Immunology (UMI), Department of Health Research (Ministry of Health & Family Welfare, Govt. of India), ICMR-Vector Control Research Centre (VCRC), Medical Complex Indira Nagar, Puducherry, 605006, India
| | - Abhisubesh Vijayakumar
- Unit of Microbiology and Immunology (UMI), Department of Health Research (Ministry of Health & Family Welfare, Govt. of India), ICMR-Vector Control Research Centre (VCRC), Medical Complex Indira Nagar, Puducherry, 605006, India
| | - Aneha Kunnikuruvan
- Unit of Microbiology and Immunology (UMI), Department of Health Research (Ministry of Health & Family Welfare, Govt. of India), ICMR-Vector Control Research Centre (VCRC), Medical Complex Indira Nagar, Puducherry, 605006, India
| | - Jibi Lukose
- Unit of Microbiology and Immunology (UMI), Department of Health Research (Ministry of Health & Family Welfare, Govt. of India), ICMR-Vector Control Research Centre (VCRC), Medical Complex Indira Nagar, Puducherry, 605006, India
| | - Hemaladkshmi Padmanaban
- Unit of Microbiology and Immunology (UMI), Department of Health Research (Ministry of Health & Family Welfare, Govt. of India), ICMR-Vector Control Research Centre (VCRC), Medical Complex Indira Nagar, Puducherry, 605006, India
| | - Bhagyashree Bora
- Unit of Microbiology and Immunology (UMI), Department of Health Research (Ministry of Health & Family Welfare, Govt. of India), ICMR-Vector Control Research Centre (VCRC), Medical Complex Indira Nagar, Puducherry, 605006, India
| | - Mathivanan Ashokkumar
- Unit of Microbiology and Immunology (UMI), Department of Health Research (Ministry of Health & Family Welfare, Govt. of India), ICMR-Vector Control Research Centre (VCRC), Medical Complex Indira Nagar, Puducherry, 605006, India
| | - Geetha Irudayaraj
- Unit of Microbiology and Immunology (UMI), Department of Health Research (Ministry of Health & Family Welfare, Govt. of India), ICMR-Vector Control Research Centre (VCRC), Medical Complex Indira Nagar, Puducherry, 605006, India
| | - Poopathi Subbiah
- Unit of Microbiology and Immunology (UMI), Department of Health Research (Ministry of Health & Family Welfare, Govt. of India), ICMR-Vector Control Research Centre (VCRC), Medical Complex Indira Nagar, Puducherry, 605006, India.
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Wang Z, Liu C, Shi Y, Huang M, Song Z, Simal-Gandara J, Li N, Shi J. Classification, application, multifarious activities and production improvement of lipopeptides produced by Bacillus. Crit Rev Food Sci Nutr 2024; 64:7451-7464. [PMID: 36876514 DOI: 10.1080/10408398.2023.2185588] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
Abstract
Lipopeptides, a class of compounds consisting of a peptide ring and a fatty acid chain, are secondary metabolites produced by Bacillus spp. As their hydrophilic and oleophilic properties, lipopeptides are widely used in food, medicine, environment and other industrial or agricultural fields. Compared with artificial synthetic surfactants, microbial lipopeptides have the advantages of low toxicity, high efficiency and versatility, resulting in urgent market demand and broad development prospect of lipopeptides. However, due to the complex metabolic network and precursor requirements of synthesis, the specific and strict synthesis pathway, and the coexistence of multiple homologous substances, the production of lipopeptides by microorganisms has the problems of high cost and low production efficiency, limiting the mass production of lipopeptides and large-scale application in industry. This review summarizes the types of Bacillus-produced lipopeptides and their biosynthetic pathways, introduces the versatility of lipopeptides, and describes the methods to improve the production of lipopeptides, including genetic engineering and optimization of fermentation conditions.
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Affiliation(s)
- Zhimin Wang
- Key Laboratory of Food Processing Technology and Quality Control in Shandong Province, College of Food Science and Engineering, Shandong Agricultural University, Tai'an, China
| | - Chao Liu
- Key Laboratory of Novel Food Resources Processing, Ministry of Agriculture and Rural Affairs/Key Laboratory of Agro-Products Processing Technology of Shandong Province/Institute of Agro-Food Science and Technology, Shandong Academy of Agricultural Sciences, Jinan, PR China
| | - Yingying Shi
- Key Laboratory of Food Processing Technology and Quality Control in Shandong Province, College of Food Science and Engineering, Shandong Agricultural University, Tai'an, China
| | - Mingming Huang
- Key Laboratory of Food Processing Technology and Quality Control in Shandong Province, College of Food Science and Engineering, Shandong Agricultural University, Tai'an, China
| | - Zunyang Song
- Key Laboratory of Food Processing Technology and Quality Control in Shandong Province, College of Food Science and Engineering, Shandong Agricultural University, Tai'an, China
| | - Jesus Simal-Gandara
- Universidade de Vigo, Nutrition and Bromatology Group, Analytical Chemistry and Food Science Department, Faculty of Science, Ourense, Spain
| | - Ningyang Li
- Key Laboratory of Food Processing Technology and Quality Control in Shandong Province, College of Food Science and Engineering, Shandong Agricultural University, Tai'an, China
| | - Jingying Shi
- Key Laboratory of Food Processing Technology and Quality Control in Shandong Province, College of Food Science and Engineering, Shandong Agricultural University, Tai'an, China
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Chen H, Liu J, Hu L, Yang J, Wang Y, Sun W, Wang R, Ding G, Li Y. Mycotoxins from Alternaria Panax, the specific plant pathogen of Panax ginseng. Mycology 2024; 14:381-392. [PMID: 38187879 PMCID: PMC10769115 DOI: 10.1080/21501203.2023.2265662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Accepted: 09/27/2023] [Indexed: 01/09/2024] Open
Abstract
Ginseng black spot, caused by Alternaria panax, is one of the most common diseases of Panax ginseng, which usually causes serious yield loss of ginseng plants. However, the pathogenic mechanism of A. panax has not been clarified clearly. Mycotoxins produced by phytopathogens play an important role in the process of infection. Previous study reported that dibutyl phthalate (DBP) identified from the metabolites of A. panax is a potent mycotoxin against P. ginseng. However, more evidence suggests that DBP is one of the constituents of plasticisers. To identify mycotoxins from A. panax and evaluate their phytotoxicity on the leaves of P. ginseng, different chromatographic, spectral and bioassay-guided methods were used together in this report. As a result, tyrosol (1), 3-hydroxy-3-(4-methoxyphenyl) propanoic acid (2), and 3-benzylpiperazine-2,5-dione (3) were isolated and characterised from the extract of A. panax, in which compounds 1 and 2 showed phytotoxic activity on ginseng leaves. Furthermore, DBP was confirmed to come from the residue of ethyl acetate through UPLC-MS/MS analysis, and displayed no phytotoxicity on ginseng leaves based on biological experiments. The results in this report first revealed that tyrosol (1), and 3-hydroxy-3-(4-methoxyphenyl) propanoic acid (2) not DBP were the potent mycotoxins of A. panax.
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Affiliation(s)
- Huiqing Chen
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Jianzi Liu
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Ling Hu
- Ningbo Academy of Inspection and Quarantine, Ningbo, China
| | - Jian Yang
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Centre for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Yanduo Wang
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Wensong Sun
- Liaoning Research Institute of Cash Crops, Liaoyang, China
| | - Rong Wang
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Gang Ding
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yong Li
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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Trinh LL, Le Nguyen AM, Nguyen HH. Root-associated bacteria Bacillus albus and Bacillus proteolyticus promote the growth of peanut seedlings and protect them from the aflatoxigenic Aspergillus flavus CDP2. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2023. [DOI: 10.1016/j.bcab.2022.102582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Salman M, Javed MR, Ali H, Mustafa G, Tariq A, Sahar T, Naheed S, Gill I, Abid M, Tawab A. Bioprotection of Zea mays L. from aflatoxigenic Aspergillus flavus by Loigolactobacillus coryniformis BCH-4. PLoS One 2022; 17:e0271269. [PMID: 35917314 PMCID: PMC9345345 DOI: 10.1371/journal.pone.0271269] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 06/28/2022] [Indexed: 11/19/2022] Open
Abstract
Fungal infection causes deterioration, discoloration, and loss of nutritional values of food products. The use of lactic acid bacteria has diverse applications in agriculture to combat pathogens and to improve the nutritional values of cereal grains. The current research evaluated the potential of Loigolactobacillus coryniformis BCH-4 against aflatoxins producing toxigenic Aspergillus flavus strain. The cell free supernatant (CFS) of Loig. coryniformis was used for the protection of Zea mays L. treated with A. flavus. No fungal growth was observed even after seven days. The FT-IR spectrum of untreated (T1: without any treatment) and treated maize grains (T2: MRS broth + A. flavus; T3: CFS + A. flavus) showed variations in peak intensities of functional group regions of lipids, proteins, and carbohydrates. Total phenolics, flavonoid contents, and antioxidant activity of T3 were significantly improved in comparison with T1 and T2. Aflatoxins were not found in T3 while observed in T2 (AFB1 and AFB2 = 487 and 16 ng/g each). HPLC analysis of CFS showed the presence of chlorogenic acid, p-coumaric acid, 4-hydroxybenzoic acid, caffeic acid, sinapic acid, salicylic acid, and benzoic acid. The presence of these acids in the CFS of Loig. coryniformis cumulatively increased the antioxidant contents and activity of T3 treated maize grains. Besides, CFS of Loig. coryniformis was passed through various treatments (heat, neutral pH, proteolytic enzymes and catalase), to observe its stability. It suggested that the inhibitory potential of CFS against A. flavus was due to the presence of organic acids, proteinaceous compounds and hydrogen peroxide. Conclusively, Loig. coryniformis BCH-4 could be used as a good bioprotecting agent for Zea mays L. by improving its nutritional and antioxidant contents.
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Affiliation(s)
- Mahwish Salman
- Department of Biochemistry, Government College University Faisalabad (GCUF), Faisalabad, Pakistan
- * E-mail: (MS); (AT)
| | - Muhammad Rizwan Javed
- Department of Bioinformatics and Biotechnology, Government College University Faisalabad (GCUF), Faisalabad, Pakistan
| | - Hazrat Ali
- National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan
| | - Ghulam Mustafa
- Department of Biochemistry, Government College University Faisalabad (GCUF), Faisalabad, Pakistan
| | - Anam Tariq
- Department of Biochemistry, Government College University Faisalabad (GCUF), Faisalabad, Pakistan
| | - Tanzila Sahar
- Department of Biochemistry, Government College Women University Faisalabad, Faisalabad, Pakistan
| | - Shazia Naheed
- Department of Chemistry, Government College University Faisalabad (GCUF), Faisalabad, Pakistan
| | - Iqra Gill
- Department of Biochemistry, Government College University Faisalabad (GCUF), Faisalabad, Pakistan
| | - Muhammad Abid
- Department of Statistics, Government College University Faisalabad (GCUF), Faisalabad, Pakistan
| | - Abdul Tawab
- National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan
- * E-mail: (MS); (AT)
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Poonia BK, Sidhu A, Sharma AB. Cyclo(l-proline-l-serine) Dipeptide Suppresses Seed Borne Fungal Pathogens of Rice: Altered Cellular Membrane Integrity of Fungal Hyphae and Seed Quality Benefits. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:2160-2168. [PMID: 35142498 DOI: 10.1021/acs.jafc.1c07659] [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: 06/14/2023]
Abstract
Five proline-containing diketopiperazines (Pro-DKPs) produced by antagonistic microorganisms as secondary metabolites were selected and synthesized under laboratory conditions. Out of five synthesized Pro-DKPs, cyclo(l-Pro-l-Ser) (DKP-6) revealed the best inhibition of fungal pathogens (Fusarium verticillioides and Fusarium fujikuroi) of rice under in vitro conditions with effective doses lower than standard fungicide carbendazim. DKP-6 induced stress on the fungal cell membrane integrity, which was revealed by calcofluor white and propidium iodide assays, endorsed by ultra-microscopic details and soluble protein leakage assays. In vivo seed treatment of infested rice seeds with DKP-6 at 2000 μg/mL for 10 h of seed treatment inflicted best reduction in seed rot and seedling blight with respect to control and carbendazim. Significant enhancement in seedling quality parameters were also observed. The work presented the strong influence of cyclo(l-Pro-l-Ser) as a mycocidal seed treatment agent better than synthetic toxic fungicides for rice.
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Affiliation(s)
| | - Anjali Sidhu
- Department of Soil Science, Punjab Agricultural University, Ludhiana 141004, India
| | - Anju Bala Sharma
- Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana 141004, India
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Polyols Induce the Production of Antifungal Compounds by Lactobacillus plantarum. Curr Microbiol 2022; 79:99. [PMID: 35150334 DOI: 10.1007/s00284-022-02761-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 01/05/2022] [Indexed: 11/03/2022]
Abstract
Mycotoxins may be present in nuts, coffee, cereals, and grapes, among other products. Increasing concerns about human health and environmental protection have driven the application of biological control techniques that can inhibit fungal contaminants. In this study, the growth inhibition of the ochratoxigenic fungus Aspergillus carbonarius Ac 162 was evaluated using 5 lactic acid bacteria (LAB). The LAB studied were Lactobacillus plantarum MZ801739 (J), Lactobacillus plantarum MZ809351 (31) and Lactobacillus plantarum MZ809350 (34), isolated in the Ivory Coast, and Lactobacillus plantarum MN982928 (3) and Leuconostoc citreum MZ801735 (23), isolated in Mexico. J, 31, 34, 3 and 23 are the internal strain codes from our laboratory. LAB were cultivated in De Man, Rogosa and Sharpe (MRS) broth, and different polyols (glycerol, mannitol, sorbitol, and xylitol) were added to the culture broth to stimulate the production of antifungal compounds. The fungal inhibition studies were performed using the poisoned food technique. The highest inhibition of A. carbonarius growth was obtained by cultivating L. plantarum MZ809351 in the presence of xylitol and glycerol. Under these conditions, 1 L of the L. plantarum MZ809351 cultures were used to identify antifungal compounds. The compounds were concentrated by solid-phase extraction and then characterized by GC-MS. In addition to 9-octadecenoic acid, 3 diketopiperazines or cyclic dipeptides were identified, including cyclo (Leu-Leu), cyclo (Pro-Gly) and cyclo (Val-Phe), which were compounds related to microbial antifungal activities. Xylitol and glycerol induced the production of these antifungal compounds against A. carbonarius Ac 162. On the other hand, adding xylitol and glycerol to the MRS broth reduced the Ochratoxin A (OTA) content to 56.8 and 54.7%, respectively. This study shows the potential for using L. plantarum MZ809351 as a biocontrol agent to prevent the growth of A. carbonarius and reduce the production of OTA in foods.
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Bangar SP, Sharma N, Kumar M, Ozogul F, Purewal SS, Trif M. Recent developments in applications of lactic acid bacteria against mycotoxin production and fungal contamination. FOOD BIOSCI 2021. [DOI: 10.1016/j.fbio.2021.101444] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Yu H, Wang J, Li X, Quan C. Effect of the environmental factors on diketopiperazine cyclo(Pro-Phe) production and antifungal activity of Bacillus amyloliquefaciens Q-426. Biologia (Bratisl) 2021. [DOI: 10.1007/s11756-021-00722-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Perera M, Wijayarathna D, Wijesundera S, Chinthaka M, Seneviratne G, Jayasena S. Biofilm mediated synergistic degradation of hexadecane by a naturally formed community comprising Aspergillus flavus complex and Bacillus cereus group. BMC Microbiol 2019; 19:84. [PMID: 31035915 PMCID: PMC6489202 DOI: 10.1186/s12866-019-1460-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 04/17/2019] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND The hydrophobic nature of hydrocarbons make them less bioavailable to microbes, generally leading to low efficiency in biodegradation. Current bioremediation strategies for hydrocarbon contamination, uses induced mixed microbial cultures. This in-vitro study demonstrates the utilization of naturally occurring communities in suitable habitats for achieving highly efficient, synergistic degradation of hydrocarbons in a simple community structure without additives. METHODS Enrichment media supplemented with 1% (7652.53 mg/L) hexadecane (HXD) as the sole carbon source were inoculated with samples of soil with waste polythene, collected from a municipal landfill in order to isolate microbial communities. Gas Chromatography-Mass Spectrometry (GC-MS) analysis was performed on HXD grown co-cultures and individual counterparts after 14 days incubation and percentage degradation was calculated. Microbes were identified using 16S rRNA gene and Internal Transcribed Spacer region sequencing. Biofilm formation was confirmed through scanning electron microscopy, in the most efficient community. RESULTS Three mixed communities (C1, C2 and C3) that demonstrated efficient visual disintegration of the HXD layer in the static liquid cultures were isolated. The C1 community showed the highest activity, degrading > 99% HXD within 14 days. C1 comprised of a single fungus and a bacterium and they were identified as a Bacillus sp. MM1 and an Apsergillus sp. MM1. The co-culture and individual counterparts of the C1 community were assayed for HXD degradation by GC-MS. Degradation by the fungal and bacterial monocultures were 52.92 ± 8.81% and 9.62 ± 0.71% respectively, compared to 99.42 ± 0.38% by the co-culture in 14 days. This proved the synergistic behavior of the community. Further, this community demonstrated the formation of a biofilm in oil-water interface in the liquid medium. This was evidenced from scanning electron microscopy (SEM) showing the Bacillus cells attached on to Aspergillus mycelia. CONCLUSIONS This study demonstrates the utilization of naturally formed fungal-bacterial communities for enhanced biodegradation of hydrocarbons such as hexadecane and reports for the first time, synergistic degradation of hexadecane through biofilm formation, by a community comprising of Bacillus cereus group and Aspergillus flavus complex.
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Affiliation(s)
- Madushika Perera
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Colombo, Colombo 08, Sri Lanka
| | | | - Sulochana Wijesundera
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Colombo, Colombo 08, Sri Lanka
| | - Manoj Chinthaka
- Department of Chemistry, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - Gamini Seneviratne
- National Institute of Fundamental Studies, Hantana Road, Kandy, Sri Lanka
| | - Sharmila Jayasena
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Colombo, Colombo 08, Sri Lanka
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A halotolerant growth promoting rhizobacteria triggers induced systemic resistance in plants and defends against fungal infection. Sci Rep 2019; 9:4054. [PMID: 30858512 PMCID: PMC6411892 DOI: 10.1038/s41598-019-40930-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 02/26/2019] [Indexed: 12/17/2022] Open
Abstract
A halotolerant rhizobacteria, Klebsiella species (referred to MBE02), was identified that had a growth stimulation effect on peanut. To gain mechanistic insights into how molecular components were reprogrammed during the interaction of MBE02 and peanut roots, we performed deep RNA-sequencing. In total, 1260 genes were differentially expressed: 979 genes were up-regulated, whereas 281 were down-regulated by MBE02 treatment as compared to uninoculated controls. A large component of the differentially regulated genes were related to phytohormone signalling. This included activation of a significant proportion of genes involved in jasmonic acid, ethylene and pathogen-defense signalling, which indicated a role of MBE02 in modulating plant immunity. In vivo and in vitro pathogenesis assays demonstrated that MBE02 treatment indeed provide fitness benefits to peanut against Aspergillus infection under controlled as well as field environment. Further, MBE02 directly reduced the growth of a wide range of fungal pathogens including Aspergillus. We also identified possible molecular components involved in rhizobacteria-mediated plant protection. Our results show the potential of MBE02 as a biocontrol agent in preventing infection against several fungal phytopathogens.
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Li XY, Wang YH, Yang J, Cui WY, He PJ, Munir S, He PF, Wu YX, He YQ. Acaricidal Activity of Cyclodipeptides from Bacillus amyloliquefaciens W1 against Tetranychus urticae. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:10163-10168. [PMID: 30200767 DOI: 10.1021/acs.jafc.8b03806] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Bioassay-guided fractionation of the supernatant of the biocontrol strain Bacillus amyloliquefaciens W1 led to the isolation of eight acaricidal cyclodipeptides from the active fractions by column chromatography separation and HPLC purification. The chemical structures of these compounds were identified as cyclo-(Gly-l-Phe), 2, cyclo-(l-Phe- trans-4-OH-l-Pro), 3, cyclo-(Gly-l-Tyr), 4, cyclo-(l-Ala-l-Pro), 5, cyclo-(l-Pro- trans-4-OH-l-Pro), 6, cyclo-(Gly-l-Pro), 7, cyclo-(l-Pro-l-Pro), 8, and cyclo-(l-Tyr- trans-4-OH-l-Pro), 9. Those cyclodipeptides displayed significant acaricidal activities with LC50 values of 13.85-98.24 μM. Cyclo-(l-Tyr- trans-4-OH-l-Pro) (LC50 13.85 μM) was five times more effective than the positive control abamectin (LC50 72.06 μM). The results indicated that the hydroxyl group is an important component. This is the first report on the acaricidal capabilities of cyclodipeptides against Tetranychus urticae. The results revealed that the acaricidal activity of the biocontrol strain B. amyloliquefaciens W1 was dependent on its constituent cyclodipeptides, which have the potential to be safe and environmentally friendly acaricides.
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Affiliation(s)
- Xing-Yu Li
- Yunnan Agricultural University , Kunming 650201 , China
- Microorganism Fermentation Engineer Research Center of Yunnan , Kunming 650217 , China
| | - Yue-Hu Wang
- Key Laboratory of Economic Plants and Biotechnology and Yunnan Key Laboratory for Wild Plant Resources , Chinese Academy of Sciences , Kunming 650201 , China
| | - Jun Yang
- Key Laboratory of Economic Plants and Biotechnology and Yunnan Key Laboratory for Wild Plant Resources , Chinese Academy of Sciences , Kunming 650201 , China
| | - Wen-Yan Cui
- Yunnan Agricultural University , Kunming 650201 , China
| | - Peng-Jie He
- Yunnan Agricultural University , Kunming 650201 , China
| | - Shahzad Munir
- Yunnan Agricultural University , Kunming 650201 , China
| | - Peng-Fei He
- Yunnan Agricultural University , Kunming 650201 , China
- Microorganism Fermentation Engineer Research Center of Yunnan , Kunming 650217 , China
| | - Yi-Xin Wu
- Yunnan Agricultural University , Kunming 650201 , China
- Microorganism Fermentation Engineer Research Center of Yunnan , Kunming 650217 , China
| | - Yue-Qiu He
- Yunnan Agricultural University , Kunming 650201 , China
- Microorganism Fermentation Engineer Research Center of Yunnan , Kunming 650217 , China
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Kulimushi PZ, Basime GC, Nachigera GM, Thonart P, Ongena M. Efficacy of Bacillus amyloliquefaciens as biocontrol agent to fight fungal diseases of maize under tropical climates: from lab to field assays in south Kivu. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:29808-29821. [PMID: 28600796 DOI: 10.1007/s11356-017-9314-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 05/18/2017] [Indexed: 06/07/2023]
Abstract
In the province of South Kivu (Democratic Republic of Congo), warm and humid climatic conditions favor the development and spreading of phytopathogens. The resulting diseases cause important losses in production both in crop and after harvest. In this study, we wanted to evaluate the potential of Bacillus amyloliquefaciens as biocontrol agent to fight some newly isolated endemic fungal pathogens infesting maize. The strain S499 has been selected based on its high in vitro antagonistic activity correlating with a huge potential to secrete fungitoxic lipopeptides upon feeding on maize root exudates. Biocontrol activity of S499 was further tested on infected plantlets in growth chamber and on plants grown under field conditions over an entire cropping period. We observed a strong protective effect of this strain evaluated at two different locations with specific agro-ecological conditions. Interestingly, disease protection was associated with higher yields and our data strongly suggest that, in addition to directly inhibit pathogens, the strain may also act as biofertilizer through the solubilization of phosphorus and/or by producing plant growth hormones in the rhizosphere. This work supports the hope of exploiting such technologically advantageous bacilli for the sake of sustainable local production of this important crop in central Africa.
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Affiliation(s)
- Parent Zihalirwa Kulimushi
- Microbial Processes and Interactions Laboratory, Faculty Gembloux Agro-BioTech, University of Liège, Passage des Déportés 2, 5030, Gembloux, Belgium
- Laboratory of Biotechnology and Molecular Biology, Faculty of Agricultural and Environmental Sciences, Université Evangélique en Afrique, 3323, Bukavu, Democratic Republic of the Congo
| | - Géant Chuma Basime
- Laboratory of Ecophysiology and Plants Nutrition, Faculty of Agricultural and Environmental Sciences, Université Evangélique en Afrique, 3323, Bukavu, Democratic Republic of the Congo
| | - Gustave Mushagalusa Nachigera
- Laboratory of Ecophysiology and Plants Nutrition, Faculty of Agricultural and Environmental Sciences, Université Evangélique en Afrique, 3323, Bukavu, Democratic Republic of the Congo
| | - Philippe Thonart
- Microbial Processes and Interactions Laboratory, Faculty Gembloux Agro-BioTech, University of Liège, Passage des Déportés 2, 5030, Gembloux, Belgium
| | - Marc Ongena
- Microbial Processes and Interactions Laboratory, Faculty Gembloux Agro-BioTech, University of Liège, Passage des Déportés 2, 5030, Gembloux, Belgium.
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14
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Caballero J, Peralta C, Molla A, Del Valle EE, Caballero P, Berry C, Felipe V, Yaryura P, Palma L. Draft Genome Sequence of Bacillus cereus CITVM-11.1, a Strain Exhibiting Interesting Antifungal Activities. J Mol Microbiol Biotechnol 2018; 28:47-51. [PMID: 29694975 DOI: 10.1159/000487597] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 02/10/2018] [Indexed: 11/19/2022] Open
Abstract
Bacillus cereus is a gram-positive, spore-forming bacterium possessing an important and historical record as a human-pathogenic bacterium. However, several strains of this species exhibit interesting potential to be used as plant growth-promoting rhizobacteria. Here, we report the draft genome sequence of B. cereus strain CITVM-11.1, which consists of 37 contig sequences, accounting for 5,746,486 bp (with a GC content of 34.8%) and 5,752 predicted protein-coding sequences. Several of them could potentially be involved in plant-bacterium interactions and may contribute to the strong antagonistic activity shown by this strain against the charcoal root rot fungus, Macrophomina phaseolina. This genomic sequence also showed a number of genes that may confer this strain resistance against several polluting heavy metals and for the bioconversion of mycotoxins.
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Affiliation(s)
- Javier Caballero
- Instituto de Agrobiotecnología, CSIC-Gobierno de Navarra, Mutilva Baja, Spain.,Departamento de Producción Agraria, Universidad Pública de Navarra, Pamplona, Spain
| | - Cecilia Peralta
- Centro de Investigaciones y Transferencia de Villa María (CIT-VM), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Villa María, Villa María, Argentina.,Instituto Académico Pedagógico de Ciencias Básicas y Aplicadas (IAPCByA), Universidad Nacional de Villa María (UNVM), Villa María, Argentina
| | - Antonella Molla
- Instituto Académico Pedagógico de Ciencias Básicas y Aplicadas (IAPCByA), Universidad Nacional de Villa María (UNVM), Villa María, Argentina
| | - Eleodoro E Del Valle
- Facultad de Ciencias Agrarias, Universidad Nacional del Litoral, Esperanza, Argentina
| | - Primitivo Caballero
- Instituto de Agrobiotecnología, CSIC-Gobierno de Navarra, Mutilva Baja, Spain.,Departamento de Producción Agraria, Universidad Pública de Navarra, Pamplona, Spain
| | - Colin Berry
- Cardiff School of Biosciences, Cardiff University, Cardiff, United Kingdom
| | - Verónica Felipe
- Instituto Académico Pedagógico de Ciencias Básicas y Aplicadas (IAPCByA), Universidad Nacional de Villa María (UNVM), Villa María, Argentina
| | - Pablo Yaryura
- Centro de Investigaciones y Transferencia de Villa María (CIT-VM), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Villa María, Villa María, Argentina.,Instituto Académico Pedagógico de Ciencias Básicas y Aplicadas (IAPCByA), Universidad Nacional de Villa María (UNVM), Villa María, Argentina
| | - Leopoldo Palma
- Centro de Investigaciones y Transferencia de Villa María (CIT-VM), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Villa María, Villa María, Argentina.,Instituto Académico Pedagógico de Ciencias Básicas y Aplicadas (IAPCByA), Universidad Nacional de Villa María (UNVM), Villa María, Argentina
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15
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Kwak MK, Liu R, Kang SO. Antimicrobial activity of cyclic dipeptides produced by Lactobacillus plantarum LBP-K10 against multidrug-resistant bacteria, pathogenic fungi, and influenza A virus. Food Control 2018. [DOI: 10.1016/j.foodcont.2017.10.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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16
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Identification of Cyclic Dipeptides from Escherichia coli as New Antimicrobial Agents against Ralstonia Solanacearum. Molecules 2018; 23:molecules23010214. [PMID: 29351264 PMCID: PMC6017746 DOI: 10.3390/molecules23010214] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 01/15/2018] [Accepted: 01/18/2018] [Indexed: 11/17/2022] Open
Abstract
Ralstonia solanacearum is a causative agent of bacterial wilt in many important crops throughout the world. How to control bacterial wilt caused by R. solanacearum is a major problem in agriculture. In this study, we aim to isolate the biocontrol agents that have high efficacy in the control of bacterial wilt. Three new bacterial strains with high antimicrobial activity against R. solanacearum GMI1000 were isolated and identified. Our results demonstrated that these bacteria could remarkably inhibit the disease index of host plant infected by R. solanacearum. It was indicated that strain GZ-34 (CCTCC No. M 2016353) showed an excellent protective effect to tomato under greenhouse conditions. Strain GZ-34 was characterized as Escherichia coli based on morphology, biochemistry, and 16S rRNA analysis. We identified that the main antimicrobial compounds produced by E. coli GZ-34 were cyclo(l-Pro-d-Ile) and cyclo(l-Pro-l-Phe) using electrospray ionization mass spectrometry (ESI-MS) and nuclear magnetic resonance (NMR) analysis. The two active compounds also interfered with the expression levels of some pathogenicity-contributors of R. solanacearum. Furthermore, cyclo(l-Pro-l-Phe) effectively inhibited spore formation of Magnaporthe grisea, which is a vital pathogenesis process of the fungal pathogen, suggesting cyclic dipeptides from E. coli are promising potential antimicrobial agents with broad-spectrum activity to kill pathogens or interfere with their pathogenesis.
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17
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Poornachandra Rao K, Deepthi BV, Rakesh S, Ganesh T, Achar P, Sreenivasa MY. Antiaflatoxigenic Potential of Cell-Free Supernatant from Lactobacillus plantarum MYS44 Against Aspergillus parasiticus. Probiotics Antimicrob Proteins 2017; 11:55-64. [DOI: 10.1007/s12602-017-9338-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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18
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Leyva Salas M, Mounier J, Valence F, Coton M, Thierry A, Coton E. Antifungal Microbial Agents for Food Biopreservation-A Review. Microorganisms 2017; 5:microorganisms5030037. [PMID: 28698479 PMCID: PMC5620628 DOI: 10.3390/microorganisms5030037] [Citation(s) in RCA: 168] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 06/21/2017] [Accepted: 06/24/2017] [Indexed: 11/16/2022] Open
Abstract
Food spoilage is a major issue for the food industry, leading to food waste, substantial economic losses for manufacturers and consumers, and a negative impact on brand names. Among causes, fungal contamination can be encountered at various stages of the food chain (e.g., post-harvest, during processing or storage). Fungal development leads to food sensory defects varying from visual deterioration to noticeable odor, flavor, or texture changes but can also have negative health impacts via mycotoxin production by some molds. In order to avoid microbial spoilage and thus extend product shelf life, different treatments—including fungicides and chemical preservatives—are used. In parallel, public authorities encourage the food industry to limit the use of these chemical compounds and develop natural methods for food preservation. This is accompanied by a strong societal demand for ‘clean label’ food products, as consumers are looking for more natural, less severely processed and safer products. In this context, microbial agents corresponding to bioprotective cultures, fermentates, culture-free supernatant or purified molecules, exhibiting antifungal activities represent a growing interest as an alternative to chemical preservation. This review presents the main fungal spoilers encountered in food products, the antifungal microorganisms tested for food bioprotection, and their mechanisms of action. A focus is made in particular on the recent in situ studies and the constraints associated with the use of antifungal microbial agents for food biopreservation.
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Affiliation(s)
- Marcia Leyva Salas
- Laboratoire Universitaire de Biodiversité et Ecologie Microbienne (LUBEM EA3882), Université de Brest, Technopole Brest-Iroise, 29280 Plouzané, France.
- UMR1253 Science et Technologie du Lait et de l'Œuf, INRA, Agrocampus Ouest, 65 rue de Saint Brieuc, 35000 Rennes, France.
| | - Jérôme Mounier
- Laboratoire Universitaire de Biodiversité et Ecologie Microbienne (LUBEM EA3882), Université de Brest, Technopole Brest-Iroise, 29280 Plouzané, France.
| | - Florence Valence
- UMR1253 Science et Technologie du Lait et de l'Œuf, INRA, Agrocampus Ouest, 65 rue de Saint Brieuc, 35000 Rennes, France.
| | - Monika Coton
- Laboratoire Universitaire de Biodiversité et Ecologie Microbienne (LUBEM EA3882), Université de Brest, Technopole Brest-Iroise, 29280 Plouzané, France.
| | - Anne Thierry
- UMR1253 Science et Technologie du Lait et de l'Œuf, INRA, Agrocampus Ouest, 65 rue de Saint Brieuc, 35000 Rennes, France.
| | - Emmanuel Coton
- Laboratoire Universitaire de Biodiversité et Ecologie Microbienne (LUBEM EA3882), Université de Brest, Technopole Brest-Iroise, 29280 Plouzané, France.
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19
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Yang X, Zhang Q, Chen ZY, Liu H, Li P. Investigation of Pseudomonas fluorescens strain 3JW1 on preventing and reducing aflatoxin contaminations in peanuts. PLoS One 2017; 12:e0178810. [PMID: 28640833 PMCID: PMC5480873 DOI: 10.1371/journal.pone.0178810] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 05/20/2017] [Indexed: 11/19/2022] Open
Abstract
Pseudomonas fluorescens strain 3JW1, which has a broad-spectrum antimicrobial activity, was studied to investigate whether it affects the amounts of aflatoxin B1 (AFB1) produced by Aspergillus flavus. It was found that the bacterium reduced the amounts of AFB1 in potato dextrose broth (PDB) and peanut medium by 97.8% and 99.4%, respectively. It also reduced AFB1 by ~183 μg/kg (55.8%) when applied onto peanut kernels. This strain reduced AFB1 via three mechanisms. First, it significantly inhibited A. flavus growth; second, our data showed that strain 3JW1 inhibits aflatoxin biosynthesis by A. flavus; and third, P. fluorescens strain 3JW1 is capable of degrading AFB1 at a rate as high as 88.3% in 96 hours. This is the first report demonstrating that Pseudomonas fluorescens can reduce toxin contamination caused by A. flavus on peanut kernels. Our findings indicate that P. fluorescens strain 3JW1 had multiple effects including reducing A. flavus infection and aflatoxin contamination. And the results also highlight the potential applications of the strain 3JW1 for the biological control of aflatoxin contamination in peanuts and other susceptible crops.
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Affiliation(s)
- Xiaona Yang
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, P. R. China
- Key Laboratory of Integrated Management of Crop Diseases and Pests (Nanjing Agricultural University), Ministry of Education, Nanjing, P. R. China
| | - Qi Zhang
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, P. R. China
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan, P. R. China
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture, Wuhan, P. R. China
- Laboratory of Risk Assessment for Oilseeds Products (Wuhan), Ministry of Agriculture, Wuhan, P. R. China
| | - Zhi-Yuan Chen
- Department of Plant Pathology and Crop Physiology, Louisiana State University Agricultural Center, Baton Rouge, Louisiana, United States of America
| | - Hongxia Liu
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, P. R. China
- Key Laboratory of Integrated Management of Crop Diseases and Pests (Nanjing Agricultural University), Ministry of Education, Nanjing, P. R. China
| | - Peiwu Li
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, P. R. China
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan, P. R. China
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture, Wuhan, P. R. China
- Laboratory of Risk Assessment for Oilseeds Products (Wuhan), Ministry of Agriculture, Wuhan, P. R. China
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20
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Qureshi AS, Khushk I, Ali CH, Chisti Y, Ahmad A, Majeed H. Coproduction of protease and amylase by thermophilic Bacillus sp. BBXS-2 using open solid-state fermentation of lignocellulosic biomass. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2016. [DOI: 10.1016/j.bcab.2016.09.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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21
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Wattana-Amorn P, Charoenwongsa W, Williams C, Crump MP, Apichaisataienchote B. Antibacterial activity of cyclo(L-Pro-L-Tyr) and cyclo(D-Pro-L-Tyr) from Streptomyces sp. strain 22-4 against phytopathogenic bacteria. Nat Prod Res 2015; 30:1980-3. [PMID: 26469746 DOI: 10.1080/14786419.2015.1095747] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Two bioactive cyclic dipeptides, cyclo(L-Pro-L-Tyr) and cyclo(D-Pro-L-Tyr), were isolated from the culture broth of Streptomyces sp. strain 22-4 and tested against three economically important plant pathogens, Xanthomonas axonopodis pv. citri, Ralstonia solanacearum and Clavibacter michiganensis. Both cyclic dipeptides were active against X. axonopodis pv. citri and R. Solanacearum with MIC of 31.25 μg/mL. No activity could be observed against C. michiganensis.
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Affiliation(s)
- Pakorn Wattana-Amorn
- a Faculty of Science, Department of Chemistry, Center of Excellence for Innovation in Chemistry and Special Research Unit for Advanced Magnetic Resonance , Kasetsart University , Bangkok , Thailand
| | - Waranya Charoenwongsa
- a Faculty of Science, Department of Chemistry, Center of Excellence for Innovation in Chemistry and Special Research Unit for Advanced Magnetic Resonance , Kasetsart University , Bangkok , Thailand
| | | | - Matthew P Crump
- b School of Chemistry , University of Bristol , Bristol , United Kingdom
| | - Busaya Apichaisataienchote
- c Faculty of Engineering and Industrial Technology, Department of Biotechnology , Silpakorn University , Nakhon Pathom , Thailand
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22
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Deepa I, Kumar SN, Sreerag RS, Nath VS, Mohandas C. Purification and synergistic antibacterial activity of arginine derived cyclic dipeptides, from Achromobacter sp. associated with a rhabditid entomopathogenic nematode against major clinically relevant biofilm forming wound bacteria. Front Microbiol 2015; 6:876. [PMID: 26379651 PMCID: PMC4548193 DOI: 10.3389/fmicb.2015.00876] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 08/10/2015] [Indexed: 01/01/2023] Open
Abstract
Skin and chronic wound infections caused by various pathogenic bacteria are an increasing and urgent health problem worldwide. In the present investigation ethyl acetate extract of an Achromobacter sp. associated with a Rhabditis entomopathogenic nematode (EPN), displayed promising antibacterial property and was further purified by silica gel column chromatography to get three different cyclic dipeptides (CDPs). Based on the spectral data and Marfey's analyses, the CDPs were identified as cyclo(D-Leu-D-Arg) (1), cyclo(L-Trp-L-Arg) (2), and cyclo(D-Trp-D-Arg) (3), respectively. Three CDPs were active against all the 10 wound associated bacteria tested. The significant antibacterial activity was recorded by CDP 3, and highest activity of 0.5 μg/ml was recorded against Staphylococcus aureus and Pseudomonas aeruginosa. The synergistic antibacterial activities of CDPs and ampicillin were assessed using the checkerboard microdilution method. The results of the current study recorded that the combined effects of CDPs and ampicillin principally recorded synergistic activity. Interestingly, the combination of CDPs and ampicillin also recorded enhanced inhibition of biofilm formation by bacteria. Moreover, CDPs significantly stimulate the production of IL-10 and IL-4 (anti-inflammatory cytokines) by human peripheral blood mononuclear cells. CDPs do not make any significant effect on the production of pro-inflammatory cytokines like TNF-α. The three CDPs have been studied for their effect on intracellular S. aureus in murine macrophages (J774) using 24 h exposure to 0.5X, 1X, and 2X MIC concentrations. Significant decrease in intracellular S. aureus burden was recorded by CDPs. CDPs also recorded no cytotoxicity toward FS normal fibroblast, VERO, and L231 normal lung epithelial cell lines. Antimicrobial activity of the arginine containing CDPs against the wound associated bacteria is reported here for the first. Moreover, this is also the first report on the production of CDPs by Achromobacter sp. Finally, we conclude that the Achromobacter sp. is an incredibly promising source of natural bioactive secondary metabolites especially against wound pathogenic bacteria that may receive significant benefit in the field of human medicine in near future as topical agents.
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Affiliation(s)
- Indira Deepa
- Division of Crop Protection, Central Tuber Crops Research Institute Thiruvananthapuram, India
| | - Sasidharan N Kumar
- Division of Crop Protection, Central Tuber Crops Research Institute Thiruvananthapuram, India
| | - Ravikumar S Sreerag
- Division of Crop Protection, Central Tuber Crops Research Institute Thiruvananthapuram, India
| | - Vishnu S Nath
- Division of Crop Protection, Central Tuber Crops Research Institute Thiruvananthapuram, India
| | - Chellapan Mohandas
- Division of Crop Protection, Central Tuber Crops Research Institute Thiruvananthapuram, India
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23
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Xu L, Xu W, Jiang Y, Hu F, Li H. Effects of interactions of auxin-producing bacteria and bacterial-feeding nematodes on regulation of peanut growths. PLoS One 2015; 10:e0124361. [PMID: 25867954 PMCID: PMC4395078 DOI: 10.1371/journal.pone.0124361] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 03/02/2015] [Indexed: 11/24/2022] Open
Abstract
The influences of an IAA (indole-3-acetic acid)-producing bacterium (Bacillus megaterium) and two bacterial-feeding nematodes (Cephalobus sp. or Mesorhabditis sp.) on the growth of peanut (Arachis hypogaea L. cv. Haihua 1) after various durations of time were investigated in natural soils. The addition of bacteria and nematodes and incubation time all significantly affected plant growth, plant root growth, plant nutrient concentrations, soil nutrient concentrations, soil microorganisms and soil auxin concentration. The addition of nematodes caused greater increases in these indices than those of bacteria, while the addition of the combination of bacteria and nematodes caused further increases. After 42-day growth, the increases in soil respiration differed between the additions of two kinds of nematodes because of differences in their life strategies. The effects of the bacteria and nematodes on the nutrient and hormone concentrations were responsible for the increases in plant growth. These results indicate the potential for promoting plant growth via the addition of nematodes and bacteria to soil.
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Affiliation(s)
- Li Xu
- Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, P.R. China
| | - Wensi Xu
- Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, P.R. China
| | - Ying Jiang
- Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, P.R. China
| | - Feng Hu
- Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, P.R. China
| | - Huixin Li
- Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, P.R. China
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