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Khan AR, Ali Q, Ayaz M, Bilal MS, Tariq H, El-Komy MH, Gu Q, Wu H, Vater J, Gao X. Bio-perfume guns: Antifungal volatile activity of Bacillus sp. LNXM12 against postharvest pathogen Botrytis cinerea in tomato and strawberry. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2024; 203:105995. [PMID: 39084769 DOI: 10.1016/j.pestbp.2024.105995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2024] [Revised: 06/15/2024] [Accepted: 06/19/2024] [Indexed: 08/02/2024]
Abstract
Gray mold disease, caused by Botrytis cinerea is a major postharvest disease impacting fruits such as strawberries and tomatoes. This study explores the use of volatile organic compounds (VOCs) produced by Bacillus spp. as eco-friendly biocontrol agents against B. cinerea. In vitro experiments demonstrated that VOCs from Bacillus sp. LNXM12, B. thuringiensis GBAC46, and B. zhanghouensis LLTC93-VOCs inhibited fungal growth by 61.2%, 40.5%, and 21.6%, respectively, compared to the control. LNXM12 was selected for further experiments due to its highest control efficacy of 58.3% and 76.6% on tomato and strawberry fruits, respectively. The LNXM12 VOCs were identified through gas chromatography-mass spectrometry (GC-MS) analysis, and 22 VOCs were identified. Synthetic VOCs with the highest probability percentage, namely ethyloctynol, 3-methyl-2-pentanone (3M2P), 1,3-butadiene-N, N-dimethylformamide (DMF), and squalene were used in experiments. The results showed that the synthetic VOCs ethyloctynol and 3M2P were highly effective, with an inhibition rate of 56.8 and 57.1% against fungal mycelium radial growth at 120 μg/mL on agar plates. Trypan blue staining revealed strongly disrupted, deeper blue, and lysed mycelium in VOC-treated B. cinerea. The scanning and transmission electron microscope (SEM and TEM) results showed that fungal mycelium was smaller, irregular, and shrunken after synthetic VOC treatments. Furthermore, the synthetic VOCs Ethyloctynol and 3M2P revealed high control efficacy on tomatoes and strawberries infected by B. cinerea. The control efficacy on leaves was 67.2%, 66.1% and 64.5%, 78.4% respectively. Similarly, the control efficiency on fruits was 45.5%, 67.3% and 46.3% 65.1%. The expression of virulence genes in B. cinerea was analyzed, and the results revealed that selected genes BcSpl1, BcXyn11A, BcPG2, BcNoxB, BcNoxR, and BcPG1 were downregulated after VOCs treatment. The overall result revealed novel mechanisms by which Bacillus sp. volatiles control postharvest gray mold disease.
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Affiliation(s)
- Abdur Rashid Khan
- Department of Plant Pathology, College of Plant Protection, Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Ministry of Education, Nanjing Agricultural University, Nanjing 210095, China
| | - Qurban Ali
- Department of Biology, College of Science, United Arab Emirates University, Al-Ain, Abu-Dhabi, United Arab Emirates
| | - Muhammad Ayaz
- Department of Plant Pathology, College of Plant Protection, Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Ministry of Education, Nanjing Agricultural University, Nanjing 210095, China
| | - Muhammad Saqib Bilal
- Department of Plant Pathology, College of Plant Protection, Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Ministry of Education, Nanjing Agricultural University, Nanjing 210095, China
| | - Hamza Tariq
- Department of Plant Pathology, College of Plant Protection, Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Ministry of Education, Nanjing Agricultural University, Nanjing 210095, China
| | - Mahmoud H El-Komy
- Department of Plant Protection, College of Food and Agricultural Sciences, King Saud University, Riyadh 11362, Saudi Arabia
| | - Qin Gu
- Department of Plant Pathology, College of Plant Protection, Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Ministry of Education, Nanjing Agricultural University, Nanjing 210095, China
| | - Huijun Wu
- Department of Plant Pathology, College of Plant Protection, Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Ministry of Education, Nanjing Agricultural University, Nanjing 210095, China
| | - Joachim Vater
- Proteomics and Spectroscopy Unit (ZBS6), Centre for Biological Threats and Special Pathogens, Robert Koch Institute, Berlin, Germany
| | - Xuewen Gao
- Department of Plant Pathology, College of Plant Protection, Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Ministry of Education, Nanjing Agricultural University, Nanjing 210095, China.
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Aytenov IS, Bozorov TA, Zhang D, Samadiy SA, Muhammadova DA, Isokulov MZ, Murodova SM, Zakirova OR, Chinikulov BK, Sherimbetov AG. Uncovering the Antifungal Potential of Plant-Associated Cultivable Bacteria from the Aral Sea Region against Phytopathogenic Fungi. Pathogens 2024; 13:585. [PMID: 39057812 PMCID: PMC11279601 DOI: 10.3390/pathogens13070585] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2024] [Revised: 07/11/2024] [Accepted: 07/12/2024] [Indexed: 07/28/2024] Open
Abstract
Two freshwater rivers, the Amu Darya and Syr Darya, flow into the Aral Sea, but they began to diminish in the early 1960s, and by the 1980s, the lake had nearly ceased to exist due to excessive water consumption for agriculture and the unsustainable management of water resources from rivers, which transformed the Aral Sea into a hypersaline lake. Despite this, the flora and fauna of the region began to evolve in the high-salinity seabed soil, which has received little attention in studies. In this study, we isolated approximately 1400 bacterial strains from the rhizosphere and phyllosphere of plant species of distinct families. Bacterial isolates were examined for antifungal activities against a range of pathogenic fungi such as Rhizoctonia gossypii, Trichothecium ovalisporum, Fusarium annulatum, F. oxysporum, F. culmorum, F. brachygibbosum, F. tricinctum, F. verticillioides, Alternaria alternata, A. terreus, Aspergillus niger, and As. flavus. Eighty-eight bacterial isolates exhibited varying antagonistic ability against pathogenic fungi. Furthermore, DNA barcoding of isolates using the 16S rRNA gene indicated that most antagonistic bacteria belonged to the Bacillus and Pseudomonas genera. The study also explored the activity of hydrolytic and cell-wall-degrading enzymes produced by antagonistic bacteria. The findings revealed that antagonistic bacteria can be utilized to widely protect seabed plants and plants growing in saline areas against pathogenic fungi, as well as agricultural crops.
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Affiliation(s)
- Ilkham S. Aytenov
- Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Key Laboratory of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; (I.S.A.); (D.Z.)
- Laboratory of Molecular and Biochemical Genetics, Institute of Genetics and Plants Experimental Biology, Uzbek Academy of Sciences, Kibray 111226, Uzbekistan; (S.A.S.); (D.A.M.); (S.M.M.)
| | - Tohir A. Bozorov
- Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Key Laboratory of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; (I.S.A.); (D.Z.)
- Laboratory of Molecular and Biochemical Genetics, Institute of Genetics and Plants Experimental Biology, Uzbek Academy of Sciences, Kibray 111226, Uzbekistan; (S.A.S.); (D.A.M.); (S.M.M.)
| | - Daoyuan Zhang
- Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Key Laboratory of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; (I.S.A.); (D.Z.)
| | - Sitora A. Samadiy
- Laboratory of Molecular and Biochemical Genetics, Institute of Genetics and Plants Experimental Biology, Uzbek Academy of Sciences, Kibray 111226, Uzbekistan; (S.A.S.); (D.A.M.); (S.M.M.)
- Department of Microbiology and Biotechnology, National University of Uzbekistan, University Street, 4, Tashkent 100174, Uzbekistan
| | - Dono A. Muhammadova
- Laboratory of Molecular and Biochemical Genetics, Institute of Genetics and Plants Experimental Biology, Uzbek Academy of Sciences, Kibray 111226, Uzbekistan; (S.A.S.); (D.A.M.); (S.M.M.)
| | - Marufbek Z. Isokulov
- Laboratory of Molecular and Biochemical Genetics, Institute of Genetics and Plants Experimental Biology, Uzbek Academy of Sciences, Kibray 111226, Uzbekistan; (S.A.S.); (D.A.M.); (S.M.M.)
| | - Sojida M. Murodova
- Laboratory of Molecular and Biochemical Genetics, Institute of Genetics and Plants Experimental Biology, Uzbek Academy of Sciences, Kibray 111226, Uzbekistan; (S.A.S.); (D.A.M.); (S.M.M.)
| | - Ozoda R. Zakirova
- Laboratory of Molecular and Biochemical Genetics, Institute of Genetics and Plants Experimental Biology, Uzbek Academy of Sciences, Kibray 111226, Uzbekistan; (S.A.S.); (D.A.M.); (S.M.M.)
| | - Bakhodir Kh. Chinikulov
- Laboratory of Molecular and Biochemical Genetics, Institute of Genetics and Plants Experimental Biology, Uzbek Academy of Sciences, Kibray 111226, Uzbekistan; (S.A.S.); (D.A.M.); (S.M.M.)
| | - Anvar G. Sherimbetov
- Laboratory of Plant Immunity, Institute of Genetics and Plants Experimental Biology, Uzbek Academy of Sciences, Kibray 111226, Uzbekistan
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Prusty JS, Kumar A. LC-MS/MS profiling and analysis of Bacillus licheniformis extracellular proteins for antifungal potential against Candida albicans. J Proteomics 2024; 303:105228. [PMID: 38878881 DOI: 10.1016/j.jprot.2024.105228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Revised: 06/11/2024] [Accepted: 06/12/2024] [Indexed: 06/18/2024]
Abstract
Candida albicans, a significant human pathogenic fungus, employs hydrolytic proteases for host invasion. Conventional antifungal agents are reported with resistance issues from around the world. This study investigates the role of Bacillus licheniformis extracellular proteins (ECP) as effective antifungal peptides (AFPs). The aim was to identify and characterize the ECP of B. licheniformis through LC-MS/MS and bioinformatics analysis. LC-MS/MS analysis identified 326 proteins with 69 putative ECP, further analyzed in silico. Of these, 21 peptides exhibited antifungal properties revealed by classAMP tool and are predominantly anionic. Peptide-protein docking revealed interactions between AFPs like Peptide chain release factor 1 (Q65DV1_Seq1: SASEQLSDAK) and Putative carboxy peptidase (Q65IF0_Seq7: SDSSLEDQDFILESK) with C. albicans virulent SAP5 proteins (PDB ID 2QZX), forming hydrogen bonds and significant Pi-Pi interactions. The identification of B. licheniformis ECP is the novelty of the study that sheds light on their antifungal potential. The identified AFPs, particularly those interacting with bonafide pharmaceutical targets SAP5 of C. albicans represent promising avenues for the development of antifungal treatments with AFPs that could be the pursuit of a novel therapeutic strategy against C. albicans. SIGNIFICANCE OF STUDY: The purpose of this work was to carry out proteomic profiling of the secretome of B. licheniformis. Previously, the efficacy of Bacillus licheniformis extracellular proteins against Candida albicans was investigated and documented in a recently communicated manuscript, showcasing the antifungal activity of these proteins. In order to achieve high-throughput identification of ES (Excretory-secretory) proteins, the utilization of liquid chromatography tandem mass spectrometry (LC-MS) was utilized. There was a lack of comprehensive research on AFPs in B. licheniformis, nevertheless. The proteins secreted by B. licheniformis in liquid medium were initially discovered using liquid chromatography-tandem mass spectrometry (LC-MS) analysis and identification in order to immediately characterize the unidentified active metabolites in fermentation broth.
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Affiliation(s)
- Jyoti Sankar Prusty
- Department of Biotechnology, National Institute of Technology, Raipur 492010, CG, India
| | - Awanish Kumar
- Department of Biotechnology, National Institute of Technology, Raipur 492010, CG, India.
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Dahar GY, Wang HW, Rajer FU, Jin P, Xu P, Abro MA, Qureshi AS, Karim A, Miao W. Comparative genomic analysis of Bacillus atrophaeus HAB-5 reveals genes associated with antimicrobial and plant growth-promoting activities. Front Microbiol 2024; 15:1384691. [PMID: 38989016 PMCID: PMC11233526 DOI: 10.3389/fmicb.2024.1384691] [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: 02/10/2024] [Accepted: 06/07/2024] [Indexed: 07/12/2024] Open
Abstract
Bacillus atrophaeus HAB-5 is a plant growth-promoting rhizobacterium (PGPR) that exhibits several biotechnological traits, such as enhancing plant growth, colonizing the rhizosphere, and engaging in biocontrol activities. In this study, we conducted whole-genome sequencing of B. atrophaeus HAB-5 using the single-molecule real-time (SMRT) sequencing platform by Pacific Biosciences (PacBio; United States), which has a circular chromosome with a total length of 4,083,597 bp and a G + C content of 44.21%. The comparative genomic analysis of B. atrophaeus HAB-5 with other strains, Bacillus amyloliquefaciens DSM7, B. atrophaeus SRCM101359, Bacillus velezensis FZB42, B. velezensis HAB-2, and Bacillus subtilis 168, revealed that these strains share 2,465 CDSs, while 599 CDSs are exclusive to the B. atrophaeus HAB-5 strain. Many gene clusters in the B. atrophaeus HAB-5 genome are associated with the production of antimicrobial lipopeptides and polypeptides. These gene clusters comprise distinct enzymes that encode three NRPs, two Transat-Pks, one terpene, one lanthipeptide, one T3PKS, one Ripp, and one thiopeptide. In addition to the likely IAA-producing genes (trpA, trpB, trpC, trpD, trpE, trpS, ywkB, miaA, and nadE), there are probable genes that produce volatile chemicals (acoA, acoB, acoR, acuB, and acuC). Moreover, HAB-5 contained genes linked to iron transportation (fbpA, fetB, feuC, feuB, feuA, and fecD), sulfur metabolism (cysC, sat, cysK, cysS, and sulP), phosphorus solubilization (ispH, pstA, pstC, pstS, pstB, gltP, and phoH), and nitrogen fixation (nif3-like, gltP, gltX, glnR, glnA, nadR, nirB, nirD, nasD, narl, narH, narJ, and nark). In conclusion, this study provides a comprehensive genomic analysis of B. atrophaeus HAB-5, pinpointing the genes and genomic regions linked to the antimicrobial properties of the strain. These findings advance our knowledge of the genetic basis of the antimicrobial properties of B. atrophaeus and imply that HAB-5 may employ a variety of commercial biopesticides and biofertilizers as a substitute strategy to increase agricultural output and manage a variety of plant diseases.
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Affiliation(s)
- Ghulam Yaseen Dahar
- Key Laboratory of Green Prevention and Control of Tropical Plant Disease and Pests, Ministry of Education, College of Plant Protection, Hainan University Haikou, Haikou, China
| | - Huan Wei Wang
- Key Laboratory of Green Prevention and Control of Tropical Plant Disease and Pests, Ministry of Education, College of Plant Protection, Hainan University Haikou, Haikou, China
| | - Faheem Uddin Rajer
- Department of Plant Pathology, Faculty of Crop Protection, Sindh Agriculture University, Tando Jam, Pakistan
| | - Pengfie Jin
- Key Laboratory of Green Prevention and Control of Tropical Plant Disease and Pests, Ministry of Education, College of Plant Protection, Hainan University Haikou, Haikou, China
| | - Peidong Xu
- Key Laboratory of Green Prevention and Control of Tropical Plant Disease and Pests, Ministry of Education, College of Plant Protection, Hainan University Haikou, Haikou, China
| | - Manzoor Ali Abro
- Department of Plant Pathology, Faculty of Crop Protection, Sindh Agriculture University, Tando Jam, Pakistan
| | - Abdul Sattar Qureshi
- Institute of Biotechnology and Genetic Engineering, University of Sindh, Jamshoro, Pakistan
| | - Asad Karim
- Jamil-Ur-Rahman Center for Genome Research, Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Weiguo Miao
- Key Laboratory of Green Prevention and Control of Tropical Plant Disease and Pests, Ministry of Education, College of Plant Protection, Hainan University Haikou, Haikou, China
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5
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Zhou XY, Ban YL, Wang CB, Chen XT, Yang HW, Feng YJ. Characterization of three novel stem rot pathogens and their antagonistic endophytic bacteria associated with Cistanche deserticola. Arch Microbiol 2024; 206:208. [PMID: 38587620 DOI: 10.1007/s00203-024-03946-0] [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: 02/08/2024] [Revised: 03/24/2024] [Accepted: 03/27/2024] [Indexed: 04/09/2024]
Abstract
Cistanche deserticola is a precious Chinese medicinal material with extremely high health care and medicinal value. In recent years, the frequent occurrence of stem rot has led to reduced or even no harvests of C. deserticola. The unstandardized use of farm chemicals in the prevention and control processes has resulted in excessive chemical residues, threatening the fragile desert ecological environment. Therefore, it is urgent to explore safe and efficient prevention and control technologies. Biocontrol agents, with the advantages of safety and environment-friendliness, would be an important idea. The isolation, screening and identification of pathogens and antagonistic endophytic bacteria are always the primary basis. In this study, three novel pathogens causing C. deserticola stem rot were isolated, identified and pathogenicity tested, namely Fusarium solani CPF1, F. proliferatum CPF2, and F. oxysporum CPF3. For the first time, the endophytic bacteria in C. deserticola were isolated and identified, of which 37 strains were obtained. Through dual culture assay, evaluation experiment and tissue culture verification, a biocontrol candidate strain Bacillus atrophaeus CE6 with outstanding control effect on the stem rot was screened out. In the tissue culture system, CE6 showed excellent control effect against F. solani and F. oxysporum, with the control efficacies reaching 97.2% and 95.8%, respectively, indicating its great potential for application in the production. This study is of great significance for the biocontrol of plant stem rot and improvement of the yield and quality of C. deserticola.
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Affiliation(s)
- Xin-Yi Zhou
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Ya-Li Ban
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Cheng-Bin Wang
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Xin-Tao Chen
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Hong-Wang Yang
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Yong-Jun Feng
- School of Life Science, Beijing Institute of Technology, Beijing, China.
- Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, Guangdong, China.
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6
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Bozorov TA, Toshmatov ZO, Kahar G, Muhammad SM, Liu X, Zhang D, Aytenov IS, Turakulov KS. Uncovering the antifungal activities of wild apple-associated bacteria against two canker-causing fungi, Cytospora mali and C. parasitica. Sci Rep 2024; 14:6307. [PMID: 38491079 PMCID: PMC10943224 DOI: 10.1038/s41598-024-56969-4] [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: 08/20/2023] [Accepted: 03/13/2024] [Indexed: 03/18/2024] Open
Abstract
Cytospora canker has become a devastating disease of apple species worldwide, and in severe cases, it may cause dieback of entire trees. The aim of this study was to characterize the diversity of cultivable bacteria from the wild apple microbiota and to determine their antifungal ability against the canker-causing pathogenic fungi Cytospora mali and C. parasitica. Five bacterial strains belonging to the species Bacillus amyloliquefaciens, B. atrophaeus, B. methylotrophicus, B. mojavensis, and Pseudomonas synxantha showed strong antagonistic effects against pathogenic fungi. Therefore, since the abovementioned Bacillus species produce known antifungal compounds, we characterized the antifungal compounds produced by Ps. synxantha. Bacteria grown on nutritional liquid medium were dehydrated, and the active compound from the crude extract was isolated and analysed via a range of chromatographic processes. High-performance liquid chromatography, mass spectrometry, and nuclear magnetic resonance analyses revealed a bioactive antifungal compound, phenazine-1-carboxylic acid (PCA). The minimum inhibitory concentration (MIC) demonstrated that PCA inhibited mycelial growth, with a MIC of 10 mg mL-1. The results suggested that PCA could be used as a potential compound to control C. mali and C. malicola, and it is a potential alternative for postharvest control of canker disease.
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Affiliation(s)
- Tohir A Bozorov
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Ürümqi, China.
- Xinjiang Key Lab of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Ürümqi, 830011, China.
- Turpan Eremophytes Botanical Garden, Chinese Academy of Sciences, Turpan, 838008, China.
- Laboratory of Molecular and Biochemical Genetics, Institute of Genetics and Plants Experimental Biology, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Uzbekistan.
| | - Zokir O Toshmatov
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Ürümqi, China
- Xinjiang Key Lab of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Ürümqi, 830011, China
- Turpan Eremophytes Botanical Garden, Chinese Academy of Sciences, Turpan, 838008, China
- Laboratory of Molecular and Biochemical Genetics, Institute of Genetics and Plants Experimental Biology, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Uzbekistan
| | - Gulnaz Kahar
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Ürümqi, China
- Xinjiang Key Lab of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Ürümqi, 830011, China
- Turpan Eremophytes Botanical Garden, Chinese Academy of Sciences, Turpan, 838008, China
| | - Surayya M Muhammad
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Ürümqi, China
- Xinjiang Key Lab of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Ürümqi, 830011, China
- Turpan Eremophytes Botanical Garden, Chinese Academy of Sciences, Turpan, 838008, China
| | - Xiaojie Liu
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Ürümqi, China
- Xinjiang Key Lab of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Ürümqi, 830011, China
- Turpan Eremophytes Botanical Garden, Chinese Academy of Sciences, Turpan, 838008, China
| | - Daoyuan Zhang
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Ürümqi, China.
- Xinjiang Key Lab of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Ürümqi, 830011, China.
- Turpan Eremophytes Botanical Garden, Chinese Academy of Sciences, Turpan, 838008, China.
| | - Ilkham S Aytenov
- Laboratory of Molecular and Biochemical Genetics, Institute of Genetics and Plants Experimental Biology, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Uzbekistan
| | - Khurshid S Turakulov
- Laboratory of Molecular and Biochemical Genetics, Institute of Genetics and Plants Experimental Biology, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Uzbekistan
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7
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Zhang Y, Fan Y, Dai Y, Jia Q, Guo Y, Wang P, Shen T, Wang Y, Liu F, Guo W, Wu A, Jiao Z, Wang C. Crude Lipopeptides Produced by Bacillus amyloliquefaciens Could Control the Growth of Alternaria alternata and Production of Alternaria Toxins in Processing Tomato. Toxins (Basel) 2024; 16:65. [PMID: 38393143 PMCID: PMC10892701 DOI: 10.3390/toxins16020065] [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: 12/27/2023] [Revised: 01/21/2024] [Accepted: 01/23/2024] [Indexed: 02/25/2024] Open
Abstract
Alternaria spp. and its toxins are the main contaminants in processing tomato. Based on our earlier research, the current study looked into the anti-fungal capacity of crude lipopeptides from B. amyloliquefaciens XJ-BV2007 against A. alternata. We found that the crude lipopeptides significantly inhibited A. alternata growth and reduced tomato black spot disease incidence. SEM analysis found that the crude lipopeptides could change the morphology of mycelium and spores of A. alternata. Four main Alternaria toxins were detected using UPLC-MS/MS, and the findings demonstrated that the crude lipopeptides could lessen the accumulation of Alternaria toxins in vivo and in vitro. Meanwhile, under the stress of crude lipopeptides, the expression of critical biosynthetic genes responsible for TeA, AOH, and AME was substantially down-regulated. The inhibitory mechanism of the crude lipopeptides was demonstrated to be the disruption of the mycelial structure of A. alternata, as well as the integrity and permeability of the membrane of A. alternata sporocytes. Taken together, crude lipopeptides extracted from B. amyloliquefaciens XJ-BV2007 are an effective biological agent for controlling tomato black spot disease and Alternaria toxins contamination.
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Affiliation(s)
- Yuanyuan Zhang
- College of Biological Sciences and Technology, Yili Normal University, Yining 835000, China; (Y.Z.); (Y.G.)
- Institute of Quality Standards & Testing Technology for Agro-Products, Xinjiang Academy of Agricultural Sciences/Key Laboratory of Functional Nutrition and Health of Characteristic Agricultural Products in Desert Oasis Ecological Region (Co-Construction by Ministry and Province), Ministry of Agriculture and Rural Affairs/Laboratory of Quality and Safety Risk Assessment for Agro-Products (Urumqi), Ministry of Agriculture and Rural Affairs/Key Laboratory of Agro-Products Quality and Safety of Xinjiang, Urumqi 830091, China; (Y.F.); (Y.D.); (Q.J.); (Y.W.); (F.L.); (W.G.)
| | - Yingying Fan
- Institute of Quality Standards & Testing Technology for Agro-Products, Xinjiang Academy of Agricultural Sciences/Key Laboratory of Functional Nutrition and Health of Characteristic Agricultural Products in Desert Oasis Ecological Region (Co-Construction by Ministry and Province), Ministry of Agriculture and Rural Affairs/Laboratory of Quality and Safety Risk Assessment for Agro-Products (Urumqi), Ministry of Agriculture and Rural Affairs/Key Laboratory of Agro-Products Quality and Safety of Xinjiang, Urumqi 830091, China; (Y.F.); (Y.D.); (Q.J.); (Y.W.); (F.L.); (W.G.)
| | - Yingying Dai
- Institute of Quality Standards & Testing Technology for Agro-Products, Xinjiang Academy of Agricultural Sciences/Key Laboratory of Functional Nutrition and Health of Characteristic Agricultural Products in Desert Oasis Ecological Region (Co-Construction by Ministry and Province), Ministry of Agriculture and Rural Affairs/Laboratory of Quality and Safety Risk Assessment for Agro-Products (Urumqi), Ministry of Agriculture and Rural Affairs/Key Laboratory of Agro-Products Quality and Safety of Xinjiang, Urumqi 830091, China; (Y.F.); (Y.D.); (Q.J.); (Y.W.); (F.L.); (W.G.)
- College of Life Science and Technology, Xinjiang University, Urumqi 830049, China
| | - Qinlan Jia
- Institute of Quality Standards & Testing Technology for Agro-Products, Xinjiang Academy of Agricultural Sciences/Key Laboratory of Functional Nutrition and Health of Characteristic Agricultural Products in Desert Oasis Ecological Region (Co-Construction by Ministry and Province), Ministry of Agriculture and Rural Affairs/Laboratory of Quality and Safety Risk Assessment for Agro-Products (Urumqi), Ministry of Agriculture and Rural Affairs/Key Laboratory of Agro-Products Quality and Safety of Xinjiang, Urumqi 830091, China; (Y.F.); (Y.D.); (Q.J.); (Y.W.); (F.L.); (W.G.)
| | - Ying Guo
- College of Biological Sciences and Technology, Yili Normal University, Yining 835000, China; (Y.Z.); (Y.G.)
| | - Peicheng Wang
- College of Food Science and Pharmacy, Xinjiang Agricultural University, Urumqi 830052, China; (P.W.); (T.S.)
| | - Tingting Shen
- College of Food Science and Pharmacy, Xinjiang Agricultural University, Urumqi 830052, China; (P.W.); (T.S.)
| | - Yan Wang
- Institute of Quality Standards & Testing Technology for Agro-Products, Xinjiang Academy of Agricultural Sciences/Key Laboratory of Functional Nutrition and Health of Characteristic Agricultural Products in Desert Oasis Ecological Region (Co-Construction by Ministry and Province), Ministry of Agriculture and Rural Affairs/Laboratory of Quality and Safety Risk Assessment for Agro-Products (Urumqi), Ministry of Agriculture and Rural Affairs/Key Laboratory of Agro-Products Quality and Safety of Xinjiang, Urumqi 830091, China; (Y.F.); (Y.D.); (Q.J.); (Y.W.); (F.L.); (W.G.)
| | - Fengjuan Liu
- Institute of Quality Standards & Testing Technology for Agro-Products, Xinjiang Academy of Agricultural Sciences/Key Laboratory of Functional Nutrition and Health of Characteristic Agricultural Products in Desert Oasis Ecological Region (Co-Construction by Ministry and Province), Ministry of Agriculture and Rural Affairs/Laboratory of Quality and Safety Risk Assessment for Agro-Products (Urumqi), Ministry of Agriculture and Rural Affairs/Key Laboratory of Agro-Products Quality and Safety of Xinjiang, Urumqi 830091, China; (Y.F.); (Y.D.); (Q.J.); (Y.W.); (F.L.); (W.G.)
| | - Wanhui Guo
- Institute of Quality Standards & Testing Technology for Agro-Products, Xinjiang Academy of Agricultural Sciences/Key Laboratory of Functional Nutrition and Health of Characteristic Agricultural Products in Desert Oasis Ecological Region (Co-Construction by Ministry and Province), Ministry of Agriculture and Rural Affairs/Laboratory of Quality and Safety Risk Assessment for Agro-Products (Urumqi), Ministry of Agriculture and Rural Affairs/Key Laboratory of Agro-Products Quality and Safety of Xinjiang, Urumqi 830091, China; (Y.F.); (Y.D.); (Q.J.); (Y.W.); (F.L.); (W.G.)
| | - Aibo Wu
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China;
| | - Ziwei Jiao
- College of Biological Sciences and Technology, Yili Normal University, Yining 835000, China; (Y.Z.); (Y.G.)
| | - Cheng Wang
- Institute of Quality Standards & Testing Technology for Agro-Products, Xinjiang Academy of Agricultural Sciences/Key Laboratory of Functional Nutrition and Health of Characteristic Agricultural Products in Desert Oasis Ecological Region (Co-Construction by Ministry and Province), Ministry of Agriculture and Rural Affairs/Laboratory of Quality and Safety Risk Assessment for Agro-Products (Urumqi), Ministry of Agriculture and Rural Affairs/Key Laboratory of Agro-Products Quality and Safety of Xinjiang, Urumqi 830091, China; (Y.F.); (Y.D.); (Q.J.); (Y.W.); (F.L.); (W.G.)
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8
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Xu M, Shi Y, Fan DL, Kang YJ, Yan XL, Wang HW. Co-Culture of White Rot Fungi Pleurotus ostreatus P5 and Bacillus amyloliquefaciens B2: A Strategy to Enhance Lipopeptide Production and Suppress of Fusarium Wilt of Cucumber. J Fungi (Basel) 2023; 9:1049. [PMID: 37998854 PMCID: PMC10672132 DOI: 10.3390/jof9111049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 10/07/2023] [Accepted: 10/17/2023] [Indexed: 11/25/2023] Open
Abstract
Fusarium wilt, caused by Fusarium oxysporum f. sp. cucumerinum (FOC), poses a serious threat to cucumber productivity. Compared to traditional chemical pesticides, biological control strategies have attracted more attention recently owing to their effectiveness against pathogens and their environmental safety. This study investigated the effect of white rot fungi Pleurotus ostreatus P5 on the production of cyclic lipopeptides (CLPs) of Bacillus amyloliquefaciens B2 and the potential co-culture filtrate of strains B2 and P5 to control cucumber Fusarium wilt. A PCR amplification of CLP genes revealed that B. amyloliquefaciens B2 had two antibiotic biosynthesis genes, namely, ituA and srf, which are involved in iturin A and surfactin synthesis. Liquid chromatography with tandem mass spectrometry (LC-MS/MS) revealed that CLPs derived from strain B2 contained two families, iturin A (C14, C15) and surfactin (C12-C17). The co-culture exhibited an enhanced accumulation of iturin A and surfactin compared to the monoculture of strain B2. Furthermore, the gene expressions of ituA and srf were both significantly upregulated when co-cultured with the fungus compared to monocultures. In an in vitro experiment, the co-culture filtrate and monoculture filtrate of B. amyloliquefaciens B2 inhibited mycelial growth by 48.2% and 33.2%, respectively. In a greenhouse experiment, the co-culture filtrate was superior to the monoculture filtrate in controlling cucumber Fusarium wilt disease and in the promotion of plant growth. Co-culture filtrate treatment significantly enhanced the microbial metabolic activity and decreased the abundance of FOC in the rhizosphere soil. These results show that the co-culture of P. ostreatus P5 and B. amyloliquefaciens B2 has great potential in cucumber Fusarium wilt disease prevention by enhancing the production of bacterial CLPs.
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Affiliation(s)
- Man Xu
- Nanjing Institute of Environmental Science, Ministry of Ecology and Environment of China, Nanjing 210042, China
- Key Laboratory of Pesticide Environmental Assessment and Pollution Control, Ministry of Ecology and Environmental of China, Nanjing 210042, China
| | - Ying Shi
- Nanjing Institute of Environmental Science, Ministry of Ecology and Environment of China, Nanjing 210042, China
- Key Laboratory of Pesticide Environmental Assessment and Pollution Control, Ministry of Ecology and Environmental of China, Nanjing 210042, China
| | - De-Ling Fan
- Nanjing Institute of Environmental Science, Ministry of Ecology and Environment of China, Nanjing 210042, China
- Key Laboratory of Pesticide Environmental Assessment and Pollution Control, Ministry of Ecology and Environmental of China, Nanjing 210042, China
| | - Yi-Jin Kang
- Nanjing Institute of Environmental Science, Ministry of Ecology and Environment of China, Nanjing 210042, China
- Key Laboratory of Pesticide Environmental Assessment and Pollution Control, Ministry of Ecology and Environmental of China, Nanjing 210042, China
| | - Xin-Li Yan
- Nanjing Institute of Environmental Science, Ministry of Ecology and Environment of China, Nanjing 210042, China
- Key Laboratory of Pesticide Environmental Assessment and Pollution Control, Ministry of Ecology and Environmental of China, Nanjing 210042, China
| | - Hong-Wei Wang
- Nanjing Institute of Environmental Science, Ministry of Ecology and Environment of China, Nanjing 210042, China
- Key Laboratory of Pesticide Environmental Assessment and Pollution Control, Ministry of Ecology and Environmental of China, Nanjing 210042, China
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9
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Yuan H, Shi B, Wang Z, Qin G, Hou H, Tu H, Wang L. Exploration of the Biocontrol Activity of Bacillus atrophaeus Strain HF1 against Pear Valsa Canker Caused by Valsa pyri. Int J Mol Sci 2023; 24:15477. [PMID: 37895155 PMCID: PMC10607598 DOI: 10.3390/ijms242015477] [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: 09/14/2023] [Revised: 10/19/2023] [Accepted: 10/20/2023] [Indexed: 10/29/2023] Open
Abstract
Valsa pyri-induced pear Valsa canker is among the most prevalent diseases to impact pear quality and yields. Biocontrol strategies to control plant disease represent an attractive alternative to the application of fungicides. In this study, the potential utility of Bacillus atrophaeus strain HF1 was assessed as a biocontrol agent against pear Valsa canker. Strain HF1 suppressed V. pyri mycelium growth by 61.20% and induced the development of malformed hyphae. Both culture filtrate and volatile organic compounds (VOCs) derived from strain HF1 were able to antagonize V. pyri growth. Treatment with strain HF1-derived culture filtrate or VOCs also induced the destruction of hyphal cell membranes. Headspace mixtures prepared from strain HF1 were analyzed, leading to the identification of 27 potential VOCs. Of the thirteen pure chemicals tested, iberverin, hexanoic acid, and 2-methylvaleraldehyde exhibited the strongest antifungal effects on V. pyri, with respective EC50 values of 0.30, 6.65, and 74.07 μL L-1. Fumigation treatment of pear twigs with each of these three compounds was also sufficient to prevent the development of pear Valsa canker. As such, these results demonstrate that B. atrophaeus strain HF1 and the volatile compounds iberverin, hexanoic acid, and 2-methylvaleraldehyde exhibit promise as novel candidate biocontrol agents against pear Valsa canker.
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Affiliation(s)
- Hongbo Yuan
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou 450009, China; (H.Y.); (B.S.); (Z.W.); (G.Q.); (H.H.); (H.T.)
- Western Agricultural Research Center, Chinese Academy of Agricultural Sciences, Changji 831100, China
| | - Bingke Shi
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou 450009, China; (H.Y.); (B.S.); (Z.W.); (G.Q.); (H.H.); (H.T.)
| | - Zhuoni Wang
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou 450009, China; (H.Y.); (B.S.); (Z.W.); (G.Q.); (H.H.); (H.T.)
| | - Genhong Qin
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou 450009, China; (H.Y.); (B.S.); (Z.W.); (G.Q.); (H.H.); (H.T.)
| | - Hui Hou
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou 450009, China; (H.Y.); (B.S.); (Z.W.); (G.Q.); (H.H.); (H.T.)
| | - Hongtao Tu
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou 450009, China; (H.Y.); (B.S.); (Z.W.); (G.Q.); (H.H.); (H.T.)
- Zhongyuan Research Center, Chinese Academy of Agricultural Sciences, Xinxiang 453004, China
| | - Li Wang
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou 450009, China; (H.Y.); (B.S.); (Z.W.); (G.Q.); (H.H.); (H.T.)
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10
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Santos JBD, Cruz JDO, Geraldo LC, Dias EG, Queiroz PRM, Monnerat RG, Borges M, Blassioli-Moraes MC, Blum LEB. Detection and evaluation of volatile and non-volatile antifungal compounds produced by Bacillus spp. strains. Microbiol Res 2023; 275:127465. [PMID: 37543004 DOI: 10.1016/j.micres.2023.127465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/24/2023] [Accepted: 07/27/2023] [Indexed: 08/07/2023]
Abstract
The identification of antifungal compounds produced by microorganisms is crucial in the context of sustainable agriculture. Bacteria of the genus Bacillus have a broad spectrum of action that can influence plant growth and control pests, vectors of public health relevance and phytopathogens. Lipopeptides are the main compounds related to the biological control of several pathogen species. Strains with biotechnological potential are identified by means of in vitro bioassays and molecular tests. In this study, strains from the Bacillus Bank of Brazilian Agricultural Research Corporation (EMBRAPA/DF/Brazil) were selected to control the fungal pathogens Sclerotinia sclerotiorum and Fusarium oxysporum by pairing assays. The detection of genes for biosynthesis of antifungal compounds from strains with high pathogen-inhibition capacity was correlated with peptide synthesis, such as bacillomycin D, fengycin d, bacilysin and surfactin. Their gene expression in contact with the pathogen was analyzed by Real-Time PCR. The volatile organic compounds produced by selected Bacillus strains were identified and quantified. In co-culture assays, the inhibition zone between Bacillus strains and Sclerotinia sclerotiorum was evaluated by scanning electron microscopy. Thirteen potentially anti-pathogenic strains were selected. Genes related to the synthesis of antifungal peptides were detected in 11 of them. In five strains, all tested genes were detected. Bacillomycin was the most frequently found lipopeptide gene. The fungus-bacteria interaction potentiated the production of volatiles. Several ketones and other volatile compounds with antifungal activity were identified. Relevant morphological changes in the fungus were observed when paired with bacteria. The study demonstrated the efficacy of the selected strains with regard to the biological control of phytopathogens and their biotechnological potential.
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Affiliation(s)
- Jônatas Barros Dos Santos
- University of Brasília (UnB), Postgraduate Program in Agronomy, Faculty of Agronomy and Veterinary Medicine, Brasília 70910-900, Brazil.
| | - José de Oliveira Cruz
- University of Brasília (UnB), Postgraduate Program in Agronomy, Faculty of Agronomy and Veterinary Medicine, Brasília 70910-900, Brazil
| | - Leticia Costa Geraldo
- University of Brasília (UnB), Postgraduate Program in Agronomy, Faculty of Agronomy and Veterinary Medicine, Brasília 70910-900, Brazil
| | - Emanuel Guimarães Dias
- University of Brasília (UnB), Postgraduate Program in Agronomy, Faculty of Agronomy and Veterinary Medicine, Brasília 70910-900, Brazil
| | | | - Rose Gomes Monnerat
- Empresa Brasileira de Pesquisa Agropecuária (Brazilian Agricultural Research Corporation) Genetic Resources and Biotechnology (CENARGEN), Brasília 70770-917, Brazil
| | - Miguel Borges
- Empresa Brasileira de Pesquisa Agropecuária (Brazilian Agricultural Research Corporation) Genetic Resources and Biotechnology (CENARGEN), Brasília 70770-917, Brazil
| | - Maria Carolina Blassioli-Moraes
- Empresa Brasileira de Pesquisa Agropecuária (Brazilian Agricultural Research Corporation) Genetic Resources and Biotechnology (CENARGEN), Brasília 70770-917, Brazil
| | - Luiz Eduardo Bassay Blum
- University of Brasília (UnB), Postgraduate Program in Agronomy, Faculty of Agronomy and Veterinary Medicine, Brasília 70910-900, Brazil
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11
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Surovy MZ, Rahman S, Rostás M, Islam T, von Tiedemann A. Suppressive Effects of Volatile Compounds from Bacillus spp. on Magnaporthe oryzae Triticum (MoT) Pathotype, Causal Agent of Wheat Blast. Microorganisms 2023; 11:1291. [PMID: 37317265 DOI: 10.3390/microorganisms11051291] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 05/02/2023] [Accepted: 05/04/2023] [Indexed: 06/16/2023] Open
Abstract
The Magnaporthe oryzae Triticum (MoT) pathotype is the causal agent of wheat blast, which has caused significant economic losses and threatens wheat production in South America, Asia, and Africa. Three bacterial strains from rice and wheat seeds (B. subtilis BTS-3, B. velezensis BTS-4, and B. velezensis BTLK6A) were used to explore the antifungal effects of volatile organic compounds (VOCs) of Bacillus spp. as a potential biocontrol mechanism against MoT. All bacterial treatments significantly inhibited both the mycelial growth and sporulation of MoT in vitro. We found that this inhibition was caused by Bacillus VOCs in a dose-dependent manner. In addition, biocontrol assays using detached wheat leaves infected with MoT showed reduced leaf lesions and sporulation compared to the untreated control. VOCs from B. velezensis BTS-4 alone or a consortium (mixture of B. subtilis BTS-3, B. velezensis BTS-4, and B. velezensis BTLK6A) of treatments consistently suppressed MoT in vitro and in vivo. Compared to the untreated control, VOCs from BTS-4 and the Bacillus consortium reduced MoT lesions in vivo by 85% and 81.25%, respectively. A total of thirty-nine VOCs (from nine different VOC groups) from four Bacillus treatments were identified by gas chromatography-mass spectrometry (GC-MS), of which 11 were produced in all Bacillus treatments. Alcohols, fatty acids, ketones, aldehydes, and S-containing compounds were detected in all four bacterial treatments. In vitro assays using pure VOCs revealed that hexanoic acid, 2-methylbutanoic acid, and phenylethyl alcohol are potential VOCs emitted by Bacillus spp. that are suppressive for MoT. The minimum inhibitory concentrations for MoT sporulation were 250 mM for phenylethyl alcohol and 500 mM for 2-methylbutanoic acid and hexanoic acid. Therefore, our results indicate that VOCs from Bacillus spp. are effective compounds to suppress the growth and sporulation of MoT. Understanding the MoT sporulation reduction mechanisms exerted by Bacillus VOCs may provide novel options to manage the further spread of wheat blast by spores.
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Affiliation(s)
- Musrat Zahan Surovy
- Division of Plant Pathology and Crop Protection, Department of Crop Sciences, Georg-August-University of Goettingen, Grisebachstrasse 6, 37077 Goettingen, Germany
- Institute of Biotechnology and Genetic Engineering (IBGE), Bangabandhu Sheikh Mujibur Rahman Agricultural University, Salna, Gazipur 1706, Bangladesh
| | - Shahinoor Rahman
- Division of Agricultural Entomology, Department of Crop Sciences, Georg-August-University of Goettingen, Grisebachstrasse 6, 37077 Goettingen, Germany
| | - Michael Rostás
- Division of Agricultural Entomology, Department of Crop Sciences, Georg-August-University of Goettingen, Grisebachstrasse 6, 37077 Goettingen, Germany
| | - Tofazzal Islam
- Institute of Biotechnology and Genetic Engineering (IBGE), Bangabandhu Sheikh Mujibur Rahman Agricultural University, Salna, Gazipur 1706, Bangladesh
| | - Andreas von Tiedemann
- Division of Plant Pathology and Crop Protection, Department of Crop Sciences, Georg-August-University of Goettingen, Grisebachstrasse 6, 37077 Goettingen, Germany
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12
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Grahovac J, Pajčin I, Vlajkov V. Bacillus VOCs in the Context of Biological Control. Antibiotics (Basel) 2023; 12:antibiotics12030581. [PMID: 36978448 PMCID: PMC10044676 DOI: 10.3390/antibiotics12030581] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 03/09/2023] [Accepted: 03/10/2023] [Indexed: 03/17/2023] Open
Abstract
A contemporary agricultural production system relying on heavy usage of agrochemicals represents a questionable outlook for sustainable food supply in the future. The visible negative environmental impacts and unforeseen consequences to human and animal health have been requiring a shift towards the novel eco-friendly alternatives for chemical pesticides for a while now. Microbial-based biocontrol agents have shown a promising potential for plant disease management. The bacteria of the genus Bacillus have been among the most exploited microbial active components due to several highly efficient mechanisms of action against plant pathogens, as well as a palette of additional plant-beneficial mechanisms, together with their suitable properties for microbial biopesticide formulations. Among other bioactive metabolites, volatile organic compounds (VOCs) have been investigated for their biocontrol applications, exhibiting the main advantage of long-distance effect without the necessity for direct contact with plants or pathogens. The aim of this study is to give an overview of the state-of-the-art in the field of Bacillus-based VOCs, especially in terms of their antibacterial, antifungal, and nematicidal action as the main segments determining their potential for biocontrol applications in sustainable agriculture.
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13
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Rani A, Rana A, Dhaka RK, Singh AP, Chahar M, Singh S, Nain L, Singh KP, Minz D. Bacterial volatile organic compounds as biopesticides, growth promoters and plant-defense elicitors: Current understanding and future scope. Biotechnol Adv 2023; 63:108078. [PMID: 36513315 DOI: 10.1016/j.biotechadv.2022.108078] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 12/03/2022] [Accepted: 12/07/2022] [Indexed: 12/14/2022]
Abstract
Bacteria emit a large number of volatile organic compounds (VOCs) into the environment. VOCs are species-specific and their emission depends on environmental conditions, such as growth medium, pH, temperature, incubation time and interaction with other microorganisms. These VOCs can enhance plant growth, suppress pathogens and act as signaling molecules during plant-microorganism interactions. Some bacterial VOCs have been reported to show strong antimicrobial, nematicidal, pesticidal, plant defense, induced tolerance and plant-growth-promoting activities under controlled conditions. Commonly produced antifungal VOCs include dimethyl trisulfide, dimethyl disulfide, benzothiazole, nonane, decanone and 1-butanol. Species of Bacillus, Pseudomonas, Arthrobacter, Enterobacter and Burkholderia produce plant growth promoting VOCs, such as acetoin and 2,3-butenediol. These VOCs affect expression of genes involved in defense and development in plant species (i.e., Arabidopsis, tobacco, tomato, potato, millet and maize). VOCs are also implicated in altering pathogenesis-related genes, inducing systemic resistance, modulating plant metabolic pathways and acquiring nutrients. However, detailed mechanisms of action of VOCs need to be further explored. This review summarizes the bioactive VOCs produced by diverse bacterial species as an alternative to agrochemicals, their mechanism of action and challenges for employment of bacterial VOCs for sustainable agricultural practices. Future studies on technological improvements for bacterial VOCs application under greenhouse and open field conditions are warranted.
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Affiliation(s)
- Annu Rani
- Department of Microbiology, College of Basic Science & Humanities, Chaudhary Charan Singh Haryana Agricultural University (CCS HAU), Hisar, India
| | - Anuj Rana
- Department of Microbiology, College of Basic Science & Humanities, Chaudhary Charan Singh Haryana Agricultural University (CCS HAU), Hisar, India; Centre for Bio-Nanotechnology, CCS HAU, Hisar, India.
| | - Rahul Kumar Dhaka
- Centre for Bio-Nanotechnology, CCS HAU, Hisar, India; Department of Chemistry, College of Basic Science & Humanities, CCS HAU, Hisar, India
| | - Arvind Pratap Singh
- Department of Microbiology, School of Life Sciences, Central University of Rajasthan, Ajmer, Rajasthan, India
| | - Madhvi Chahar
- Department of Bio & Nano Technology, Guru Jambheshwar University of Science & Technology, Hisar, India
| | - Surender Singh
- Department of Microbiology, Central University of Haryana, Mahendargarh, India
| | - Lata Nain
- Division of Microbiology, ICAR - Indian Agricultural Research Institute, New Delhi, India
| | - Krishna Pal Singh
- Biophysics Unit, College of Basic Sciences and Humanities, G.B. Pant University of Agriculture & Technology, Pantnagar, India; Vice Chancellor's Secretariat, Mahatma Jyotiba Phule Rohilkhand University, Bareilly, UP, India
| | - Dror Minz
- Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization, The Volcani Center, Rishon LeZion, Israel.
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14
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Siddharthan N, Balagurunathan R, Venkatesan S, Hemalatha N. Bio-efficacy of Geobacillus thermodenitrificans PS41 against larvicidal, fungicidal, and plant growth-promoting activities. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:42596-42607. [PMID: 35670947 DOI: 10.1007/s11356-022-20455-z] [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: 12/15/2021] [Accepted: 04/21/2022] [Indexed: 06/15/2023]
Abstract
The microbial interactions with plant hosts were known to establish plant growth and beneficial productivity. Some bacteria, fungi, actinomycetes, yeast, and algae have proven as potential effective microbes in agricultural field. In this study, the insecticidal effect of Geobacillus thermodenitrificans PS41 secondary metabolites was tested against third instar larvae of Spodoptera litura, with mortality rate 60.26 ± 1.5% which might influence the agropest management. The test bacterial metabolites were subjected to GC-MS analysis. Totally, 17 different compounds were identified from the ethyl acetate extract metabolites of PS41 strain. The highest peak was obtained with behenic alcohol compound followed by 1-octadecene and penta erythrityl tetrachloride. The Geobacillus thermodenitrificans PS41 secondary metabolites showed potential antifungal activity against plant pathogenic fungi. The highest inhibit was attained against Cladosporium sp., (25 mm) followed by Rhizoctonia solani and Alternaria brassicola (23 mm). However, no toxic effect was exerted upon earthworm (Perionyx excavatus) when treated with PS41 bacterial metabolites. The potential PS41 strain was also found supporting the plant growth. The potential bacterial strain PS41 did not show antagonistic activity against soil bacteria such as Rhizobium sp., Azotobacter sp., Azospirullum brasilense, Pseudomonas fluorescens and Bacillus megaterium. The potential test organism, Geobacillus thermodenitrificans PS41, possessing biopesticide and biofertilizer properties can be a suitable ecofriendly organic applicant in agricultural field for enhancing crop production.
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Affiliation(s)
- Nagarajan Siddharthan
- Department of Microbiology, Periyar University, Periyar Palkalai Nagar, Salem, Tamil Nadu, 11, India
| | - Ramasamy Balagurunathan
- Department of Microbiology, Periyar University, Periyar Palkalai Nagar, Salem, Tamil Nadu, 11, India
| | - Srinivasan Venkatesan
- Department of Environmental Science, Periyar University, Periyar Palkalai Nagar, Salem, Tamil Nadu, 11, India
| | - Natarajan Hemalatha
- Department of Microbiology, Periyar University, Periyar Palkalai Nagar, Salem, Tamil Nadu, 11, India.
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15
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Effects of Bacillus amyloliquefaciens XJ-BV2007 on Growth of Alternaria alternata and Production of Tenuazonic Acid. Toxins (Basel) 2023; 15:toxins15010053. [PMID: 36668873 PMCID: PMC9867350 DOI: 10.3390/toxins15010053] [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: 12/14/2022] [Revised: 01/02/2023] [Accepted: 01/04/2023] [Indexed: 01/11/2023] Open
Abstract
Large amounts of processing tomato are grown in Xinjiang, China. Tomato black spot disease, caused by Alternaria spp., and the produced alternaria toxins in tomato products are posing risks to human health. In this study, we isolated a rhizospheric bacterium, XJ-BV2007, from tomato (Solanum lycopersicum) fields, which we identified as Bacillus amyloliquefaciens. We found that this bacterium has a strong antagonistic effect against Alternaria alternata and reduces the accumulation of alternaria toxins in tomatoes. According to the antifungal activity of the bacteria-free filtrate, we revealed that B. amyloliquefaciens XJ-BV2007 suppresses A. alternata by the production of antifungal metabolites. Combining semi-preparative high-performance liquid chromatography, we employed UPLC-QTOF-MS analysis and the Oxford cup experiment to find that fengycin plays an important role in inhibiting A. alternata. This paper firstly reported that B. amyloliquefaciens efficiently controls tomato black spot disease and mycotoxins caused by A. alternata. B. amyloliquefaciens XJ-BV2007 may provide an alternative biocontrol strain for the prevention of tomato black spot disease.
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16
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Almeida OAC, de Araujo NO, Dias BHS, de Sant’Anna Freitas C, Coerini LF, Ryu CM, de Castro Oliveira JV. The power of the smallest: The inhibitory activity of microbial volatile organic compounds against phytopathogens. Front Microbiol 2023; 13:951130. [PMID: 36687575 PMCID: PMC9845590 DOI: 10.3389/fmicb.2022.951130] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 09/20/2022] [Indexed: 01/06/2023] Open
Abstract
Plant diseases caused by phytopathogens result in huge economic losses in agriculture. In addition, the use of chemical products to control such diseases causes many problems to the environment and to human health. However, some bacteria and fungi have a mutualistic relationship with plants in nature, mainly exchanging nutrients and protection. Thus, exploring those beneficial microorganisms has been an interesting and promising alternative for mitigating the use of agrochemicals and, consequently, achieving a more sustainable agriculture. Microorganisms are able to produce and excrete several metabolites, but volatile organic compounds (VOCs) have huge biotechnology potential. Microbial VOCs are small molecules from different chemical classes, such as alkenes, alcohols, ketones, organic acids, terpenes, benzenoids and pyrazines. Interestingly, volatilomes are species-specific and also change according to microbial growth conditions. The interaction of VOCs with other organisms, such as plants, insects, and other bacteria and fungi, can cause a wide range of effects. In this review, we show that a large variety of plant pathogens are inhibited by microbial VOCs with a focus on the in vitro and in vivo inhibition of phytopathogens of greater scientific and economic importance in agriculture, such as Ralstonia solanacearum, Botrytis cinerea, Xanthomonas and Fusarium species. In this scenario, some genera of VOC-producing microorganisms stand out as antagonists, including Bacillus, Pseudomonas, Serratia and Streptomyces. We also highlight the known molecular and physiological mechanisms by which VOCs inhibit the growth of phytopathogens. Microbial VOCs can provoke many changes in these microorganisms, such as vacuolization, fungal hyphal rupture, loss of intracellular components, regulation of metabolism and pathogenicity genes, plus the expression of proteins important in the host response. Furthermore, we demonstrate that there are aspects to investigate by discussing questions that are still not very clear in this research area, especially those that are essential for the future use of such beneficial microorganisms as biocontrol products in field crops. Therefore, we bring to light the great biotechnological potential of VOCs to help make agriculture more sustainable.
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Affiliation(s)
- Octávio Augusto Costa Almeida
- Brazilian Biorenewables National Laboratory (LNBR), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil,Graduate Program in Genetics and Molecular Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Natália Oliveira de Araujo
- Brazilian Biorenewables National Laboratory (LNBR), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil,Graduate Program in Genetics and Molecular Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Bruno Henrique Silva Dias
- Brazilian Biorenewables National Laboratory (LNBR), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil,Graduate Program in Genetics and Molecular Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Carla de Sant’Anna Freitas
- Brazilian Biorenewables National Laboratory (LNBR), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil,Graduate Program in Genetics and Molecular Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Luciane Fender Coerini
- Brazilian Biorenewables National Laboratory (LNBR), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil,Graduate Program in Genetics and Molecular Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Choong-Min Ryu
- Molecular Phytobacteriology Laboratory, Korea Research Institute of Bioscience & Biotechnology (KRIBB), Daejeon, South Korea,Biosystems and Bioengineering Program, University of Science and Technology, Daejeon, South Korea
| | - Juliana Velasco de Castro Oliveira
- Brazilian Biorenewables National Laboratory (LNBR), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil,Graduate Program in Genetics and Molecular Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil,*Correspondence: Juliana Velasco de Castro Oliveira,
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Varol A, Albayrak S, Ozkan H, Demir Y, Taskin M, Adiguzel A. Production, purification and characterization of novel fibrinolytic enzyme from Bacillus atrophaeus V4. Biologia (Bratisl) 2022. [DOI: 10.1007/s11756-022-01281-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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18
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Ragunathan J, Appusami S, Kadiri M, Venkatesan R, Nallusamy S, Sevugapperumal N. Deciphering the Biomolecules from Bacillus atrophaeus NMB01 Untangles the Anti-Oomycetes Action of Trioxsalen and Corynan-17-ol, Against Phytophthora infestans Inciting Late Blight of Potato. Indian J Microbiol 2022; 62:641-650. [PMID: 36458213 PMCID: PMC9705679 DOI: 10.1007/s12088-022-01044-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 10/13/2022] [Indexed: 11/07/2022] Open
Abstract
The antagonistic Bacillus spp. is known well for the production of versatile antimicrobial biomolecules with broad spectrum of action against different types of plant pathogens. Considering the significance of metabolically active biomolecules, attempts were made to decipher the anti-oomycete nature of biomolecules produced by Bacillus atrophaeus NMB01 during di-trophic interaction with Phytophthora infestans. Ten biomolecules produced by B. atrophaeus NMB01 during di-trophic interaction with P. infestans were docked against the twelve target proteins of P. infestans. Molecular docking of biomolecules reported trioxsalen and corynan-17-ol,18,19-didehydro-10-methoxy-acetate(ester) as best hits with highest binding energy in the range of - 7.5 to - 5 kcal/mol against target proteins of P. infestans. Comparatively less binding energy was observed for commercially available fungicides mandipropamid and metalaxyl on docking against the target proteins of P. infestans. We also confirmed the direct impact of trioxsalen andcorynan-17-ol, on P. infestans under in vitro with 66% and 50% inhibition of mycelial growth of P. infestans, respectively. This is the first study attempted to untangle the role of bioactive anti-oomycete compounds produced by B. atrophaeus strain NMB01 during di-trophic interaction with P. infestans against late blight pathogen P. infestans infecting potato. From the present study, we conclude that the biomolecules, trioxsalen and corynan-17-ol, can be explored for the management of P. infestans, the incitant of late blight of potato. Graphical Abstract Supplementary Information The online version contains supplementary material available at 10.1007/s12088-022-01044-7.
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Affiliation(s)
- Janani Ragunathan
- Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003 India
| | - Sudha Appusami
- Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003 India
| | - Mahendra Kadiri
- Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003 India
| | - Ragapriya Venkatesan
- Department of Plant Molecular Biology and Bioinformatics, Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003 India
| | - Saranya Nallusamy
- Department of Plant Molecular Biology and Bioinformatics, Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003 India
| | - Nakkeeran Sevugapperumal
- Department of Plant Biotechnology, Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003 India
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Lu M, Chen Y, Li L, Ma Y, Tong Z, Guo D, Sun P, An D. Analysis and Evaluation of the Flagellin Activity of Bacillus amyloliquefaciens Ba168 Antimicrobial Proteins against Penicillium expansum. Molecules 2022; 27:molecules27134259. [PMID: 35807503 PMCID: PMC9268043 DOI: 10.3390/molecules27134259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 06/26/2022] [Accepted: 06/28/2022] [Indexed: 11/16/2022] Open
Abstract
Blue mold caused by Penicillium expansum is one of the most common apple diseases, and it is becoming a serious threat in apple production. The strain Bacillus amyloliquefaciens Ba168 showed high levels of antimicrobial activity in our previous study. To analyze the antimicrobial protein of Ba168, a high-resolution LC-MS/MS proteomic analysis was performed. A total of 1155 proteins were identified from 5233 unique peptides. A total of 16 potential antimicrobial-activity-related proteins were identified; 10 of these proteins have direct antimicrobial effects, while 6 of these proteins are associated with the formation of antimicrobial substances. Then, an antifungal protein of Ba168 was isolated and purified by the sequential chromatography of DEAE Bio-sep FF anion exchange and Sephadex G-75. The single protein, named BP8-2, showed antifungal activity towards Penicillium expansum. The peptide mass fingerprinting of the protein band of BP8-2 had a high similarity with the amino acid sequences of flagellin protein. The results showed that BP8-2 significantly inhibited the growth of P. expansum and slowed the spread of apple blue mold. The results indicated that flagellin is one of the important antimicrobial substances from Ba168.
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Affiliation(s)
- Meihuan Lu
- Microbiology Institute of Shaanxi, Xi’an 710043, China; (M.L.); (L.L.); (Y.M.); (Z.T.)
- College of Plant Protection and Shaanxi Key Laboratory of Molecular Biology for Agriculture, Northwest A&F University, Yangling 712100, China; (Y.C.); (D.G.)
| | - Yahan Chen
- College of Plant Protection and Shaanxi Key Laboratory of Molecular Biology for Agriculture, Northwest A&F University, Yangling 712100, China; (Y.C.); (D.G.)
- College of Plant Protection, Gansu Agricultural University, Lanzhou 730070, China
| | - Lijun Li
- Microbiology Institute of Shaanxi, Xi’an 710043, China; (M.L.); (L.L.); (Y.M.); (Z.T.)
| | - Yinghui Ma
- Microbiology Institute of Shaanxi, Xi’an 710043, China; (M.L.); (L.L.); (Y.M.); (Z.T.)
| | - Zefang Tong
- Microbiology Institute of Shaanxi, Xi’an 710043, China; (M.L.); (L.L.); (Y.M.); (Z.T.)
| | - Dongsheng Guo
- College of Plant Protection and Shaanxi Key Laboratory of Molecular Biology for Agriculture, Northwest A&F University, Yangling 712100, China; (Y.C.); (D.G.)
| | - Pingping Sun
- College of Horticulture and Plant Protection, Inner Mongolia Agricultural University, Huhhot 010018, China
- Correspondence: (P.S.); (D.A.); Tel.: +86-1323-8417-255 (P.S.); Fax: +86-471-638-5801 (P.S.)
| | - Derong An
- College of Plant Protection and Shaanxi Key Laboratory of Molecular Biology for Agriculture, Northwest A&F University, Yangling 712100, China; (Y.C.); (D.G.)
- Correspondence: (P.S.); (D.A.); Tel.: +86-1323-8417-255 (P.S.); Fax: +86-471-638-5801 (P.S.)
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Han VC, Yu NH, Yoon H, Ahn NH, Son YK, Lee BH, Kim JC. Identification, Characterization, and Efficacy Evaluation of Bacillus velezensis for Shot-Hole Disease Biocontrol in Flowering Cherry. THE PLANT PATHOLOGY JOURNAL 2022; 38:115-130. [PMID: 35385917 PMCID: PMC9343898 DOI: 10.5423/ppj.oa.01.2022.0004] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 02/07/2022] [Accepted: 02/08/2022] [Indexed: 06/14/2023]
Abstract
Though information exists regarding the pathogenesis of the shot-hole disease (SH) in flowering cherry (FC), there has been a lack of research focusing on SH management. Therefore, here, we investigated the inhibitory activities of antagonistic bacteria against SH pathogens both in vitro and in vivo as well as their biochemical characteristics and bioactive compounds. Two biosurfactant-producing bacterial antagonists, identified as Bacillus velezensis strains JCK-1618 and JCK-1696, exhibited the best effects against the growth of both bacterial and fungal SH pathogens in vitro through their cell-free culture filtrates (CFCFs). These two strains also strongly inhibited the growth of the pathogens via the action of their antimicrobial diffusible compounds and antimicrobial volatile organic compounds (VOCs). Crude enzymes, solvent extracts, and biosurfactants of the two strains exhibited antimicrobial activities. Liquid chromatography/electrospray ionization time-of-flight mass spectrometric analysis of the partially purified active fractions revealed that the two antagonists produced three cyclic lipopeptides, including iturin A, fengycin A, and surfactin, and a polyketide, oxydifficidin. In a detached leaf assay, pre-treatment and co-treatment of FC leaves with the CFCFs led to a large reduction in the severity of the leaf spots caused by Epicoccum tobaicum and Bukholderia contaminans, respectively. In addition, the two antagonists produced indole-3-acetic acid, siderophore, and a series of hydrolytic enzymes, along with the formation of a substantial biofilm. To our knowledge, this is the first report of the antimicrobial activities of the diffusible compounds and VOCs of B. velezensis against the SH pathogens and their efficiency in the biocontrol of SH.
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Affiliation(s)
- Viet-Cuong Han
- Department of Agricultural Chemistry, Institute of Environmentally-Friendly Agriculture, College of Agriculture and Life Science, Chonnam National University, Gwangju 61186, Korea
| | - Nan Hee Yu
- Department of Agricultural Chemistry, Institute of Environmentally-Friendly Agriculture, College of Agriculture and Life Science, Chonnam National University, Gwangju 61186, Korea
| | - Hyeokjun Yoon
- Biological and Genetic Resources Assessment Division, National Institute of Biological Resources, Incheon 22689, Korea
| | - Neung-Ho Ahn
- Biological and Genetic Resources Assessment Division, National Institute of Biological Resources, Incheon 22689, Korea
| | - Youn Kyoung Son
- Biological and Genetic Resources Assessment Division, National Institute of Biological Resources, Incheon 22689, Korea
| | - Byoung-Hee Lee
- Biological and Genetic Resources Assessment Division, National Institute of Biological Resources, Incheon 22689, Korea
| | - Jin-Cheol Kim
- Department of Agricultural Chemistry, Institute of Environmentally-Friendly Agriculture, College of Agriculture and Life Science, Chonnam National University, Gwangju 61186, Korea
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21
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Tong W, He P, Yang Y, Qiao Z, Huang D, Luo H, Feng X. Occurrence, Diversity, and Character of Bacillaceae in the Solid Fermentation Process of Strong Aromatic Liquors. Front Microbiol 2022; 12:811788. [PMID: 35173694 PMCID: PMC8843357 DOI: 10.3389/fmicb.2021.811788] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 12/07/2021] [Indexed: 11/13/2022] Open
Abstract
Strong aromatic liquors, also known as strong aromatic Baijiu (SAB) in China, are manufactured by solid fermentation, with a multi-microbe mixing and cooperative fermentation process that uses Daqu as a brewing starter. Bacillaceae have a specific action in food fermentation, such as soybean and wine, and more recent studies have found Bacillaceae play important roles in the SAB making industry. This review describes the diversity, functionality, and influence of Bacillaceae in Daqu, pit mud, Zaopei, Huangshui within making processes of SAB. Furthermore, aromatic flavor components from the Bacillaceae metabolism of SAB are discussed in this review. Ultimately, the resulting improvements and deeper understanding will benefit practical efforts to apply representatives of Bacillaceae in improving the quality of SAB as well as biological control of the micro-ecological environment of brewing.
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Affiliation(s)
- Wenhua Tong
- College of Bioengineering, Sichuan University of Science and Engineering, Yibin, China.,CAS Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences (CAS), Qingdao, China.,Wuliangye Yibin Co. Ltd., Yibin, China
| | - Ping He
- College of Bioengineering, Sichuan University of Science and Engineering, Yibin, China
| | - Ying Yang
- College of Bioengineering, Sichuan University of Science and Engineering, Yibin, China
| | | | - Dan Huang
- College of Bioengineering, Sichuan University of Science and Engineering, Yibin, China
| | - Huibo Luo
- College of Bioengineering, Sichuan University of Science and Engineering, Yibin, China
| | - Xinjun Feng
- CAS Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences (CAS), Qingdao, China
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22
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Antifungal Compounds of Plant Growth-Promoting Bacillus Species. Fungal Biol 2022. [DOI: 10.1007/978-3-031-04805-0_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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23
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Duan Y, Chen R, Zhang R, Jiang W, Chen X, Yin C, Mao Z. Isolation, Identification, and Antibacterial Mechanisms of Bacillus amyloliquefaciens QSB-6 and Its Effect on Plant Roots. Front Microbiol 2021; 12:746799. [PMID: 34603274 PMCID: PMC8482014 DOI: 10.3389/fmicb.2021.746799] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 08/26/2021] [Indexed: 01/22/2023] Open
Abstract
Apple replant disease (ARD) is a common problem in major apple planting areas, and biological factors play a leading role in its etiology. Here, we isolated the bacterial strain QSB-6 from the rhizosphere soil of healthy apple trees in a replanted orchard using the serial dilution method. Strain QSB-6 was provisionally identified as Bacillus amyloliquefaciens based on its morphology, physiological and biochemical characteristics, carbon source utilization, and chemical sensitivity. Maximum likelihood analysis based on four gene sequences [16S ribosomal RNA gene (16S rDNA), DNA gyrase subunit A (gyrA), DNA gyrase subunit B (gyrB), and RNA polymerase subunit B (rpoB)] from QSB-6 and other strains indicated that it had 100% homology with B. amyloliquefaciens, thereby confirming its identification. Flat standoff tests showed that strain QSB-6 had a strong inhibitory effect on Fusarium proliferatum, Fusarium solani, Fusarium verticillioides, Fusarium oxysporum, Alternaria alternata, Aspergillus flavus, Phoma sp., Valsa mali, Rhizoctonia solani, Penicillium brasilianum, and Albifimbria verrucaria, and it had broad-spectrum antibacterial characteristics. Extracellular metabolites from strain QSB-6 showed a strong inhibitory effect on Fusarium hyphal growth and spore germination, causing irregular swelling, atrophy, rupture, and cytoplasmic leakage of fungal hyphae. Analysis of its metabolites showed that 1,2-benzenedicarboxylic acid and benzeneacetic acid, 3- hydroxy-, methyl ester had good inhibitory effects on Fusarium, and increased the length of primary roots and the number of lateral roots of Arabidopsis thaliana plantlet. Pot experiments demonstrated that a QSB-6 bacterial fertilizer treatment (T2) significantly improved the growth of Malus hupehensis Rehd. seedlings. It increased root length, surface area, tips, and forks, respiration rate, protective enzyme activities, and the number of soil bacteria while reducing the number of soil fungi. Fermentation broth from strain QSB-6 effectively prevented root damage from Fusarium. terminal restriction fragment length polymorphism (T-RFLP) and quantitative PCR (qPCR) assays showed that the T2 treatment significantly reduced the abundance of Fusarium in the soil and altered the soil fungal community structure. In summary, B. amyloliquefaciens QSB-6 has a good inhibitory effect on Fusarium in the soil and can significantly promote plant root growth. It has great potential as a biological control agent against ARD.
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Affiliation(s)
- Yanan Duan
- National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Shandong, China
| | - Ran Chen
- National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Shandong, China
| | - Rong Zhang
- National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Shandong, China
| | - Weitao Jiang
- National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Shandong, China
| | - Xuesen Chen
- National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Shandong, China
| | - Chengmiao Yin
- National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Shandong, China
| | - Zhiquan Mao
- National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Shandong, China
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Xiao J, Guo X, Qiao X, Zhang X, Chen X, Zhang D. Activity of Fengycin and Iturin A Isolated From Bacillus subtilis Z-14 on Gaeumannomyces graminis Var. tritici and Soil Microbial Diversity. Front Microbiol 2021; 12:682437. [PMID: 34220767 PMCID: PMC8250863 DOI: 10.3389/fmicb.2021.682437] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 05/25/2021] [Indexed: 12/13/2022] Open
Abstract
Bacillus subtilis Z-14 can inhibit phytopathogenic fungi, and is used as a biocontrol agent for wheat take-all disease. The present study used the soil-borne fungus Gaeumannomyces graminis var. tritici (Ggt), which causes wheat take-all disease, and the soil microbial community as indicators, and investigated the antifungal effects of fengycin and iturin A purified from strain Z-14 using high performance liquid chromatography and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, respectively. The results showed that fengycin destroyed the internal structure of Ggt cells by digesting the cytoplasm and organelles, forming vacuoles, and inducing hyphal shrinkage and distortion. Iturin A induced cell wall disappearance, membrane degeneration, intracellular material shrinkage, and hyphal fragmentation. A biocontrol test demonstrated a 100% control effect on wheat take-all when wheat seedlings were treated with fengycin at 100 μg/ml or iturin A at 500 μg/ml. Iturin A and fengycin both reduced the relative abundance of Aspergillus and Gibberella. At the genus level, iturin A reduced the relative abundance of Mortierella and Myrothecium, while fengycin reduced that of Fusarium. Only fengycin treatment for 7 days had a significant effect on soil bacterial diversity.
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Affiliation(s)
- Jiawen Xiao
- College of Life Science, Hebei Agricultural University, Baoding, China
| | - Xiaojun Guo
- College of Life Science, Hebei Agricultural University, Baoding, China
| | - Xinlei Qiao
- College of Life Science, Hebei Agricultural University, Baoding, China
| | - Xuechao Zhang
- College of Life Science, Hebei Agricultural University, Baoding, China
| | - Xiaomeng Chen
- College of Life Science, Hebei Agricultural University, Baoding, China
| | - Dongdong Zhang
- College of Life Science, Hebei Agricultural University, Baoding, China
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25
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Chen L, Zhang H, Zhao S, Xiang B, Yao Z. Lipopeptide production by Bacillus atrophaeus strain B44 and its biocontrol efficacy against cotton rhizoctoniosis. Biotechnol Lett 2021; 43:1183-1193. [PMID: 33738609 DOI: 10.1007/s10529-021-03114-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Accepted: 03/06/2021] [Indexed: 11/26/2022]
Abstract
OBJECTIVES An assay was conducted to show the comparisons the effects of nine metal ions on antagonistic metabolites (lipopeptides, siderophores and gibberellins) by Bacillus atrophaeus strain B44 using well-diffusion assays, matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF-MS) analysis, chrome azurol S plus mannitol salt agar (CAS-MSA) tests, and reversed-phase high-performance liquid chromatography (RP-HPLC) analysis. This assay is also designed to demonstrate the biocontrol efficacy of B44 against cotton rhizoctoniosis using pot culture tests. RESULTS Both the lipopeptide yield and the antimicrobial activity of B44 increase with the MnSO4, MgSO4, CaCO3, and CuSO4 treatments and either have no effect or decreased lipopeptide yield and antimicrobial activity with the FeSO4, K2HPO4, KCl, KH2PO4 and ZnSO4 treatments. The medium containing MgSO4 has no significant effect on either the lipopeptide yield or antimicrobial activity. MALDI-TOF-MS analysis shows a broad range of m/z peaks, indicating that strain B44 produces a complex mixture of iturin, surfactin, and fengycin lipopeptides. Gibberellin production by strain B44 varies greatly depending on the culture medium, and the siderophore production is not significantly affected by the culture medium. Pot tests show that lipopeptide production affects the disease control efficacy of strain B44. CONCLUSION The biocontrol efficacy of B. atrophaeus strain B44 is related to the lipopeptide yield. Moreover, B. atrophaeus strain B44 significantly increases the size of cotton seedlings, which is related to the GA3 concentration.
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Affiliation(s)
- Li Chen
- Key Laboratory at Universities of Xinjiang Uygur Autonomous Region for Oasis Agricultural Pest Management and Plant Protection Resource Utilization/College of Agriculture, Shihezi University, Shihezi, 832003, China.
| | - Hui Zhang
- Institute of Agricultural Resources and Environment, Chongqing Academy of Agricultural Sciences, Chongqing, 401329, China
| | - Sifeng Zhao
- Key Laboratory at Universities of Xinjiang Uygur Autonomous Region for Oasis Agricultural Pest Management and Plant Protection Resource Utilization/College of Agriculture, Shihezi University, Shihezi, 832003, China.
| | - Benchun Xiang
- Key Laboratory at Universities of Xinjiang Uygur Autonomous Region for Oasis Agricultural Pest Management and Plant Protection Resource Utilization/College of Agriculture, Shihezi University, Shihezi, 832003, China
| | - Zhaoqun Yao
- Key Laboratory at Universities of Xinjiang Uygur Autonomous Region for Oasis Agricultural Pest Management and Plant Protection Resource Utilization/College of Agriculture, Shihezi University, Shihezi, 832003, China
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26
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Shahid I, Han J, Hanooq S, Malik KA, Borchers CH, Mehnaz S. Profiling of Metabolites of Bacillus spp. and Their Application in Sustainable Plant Growth Promotion and Biocontrol. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2021. [DOI: 10.3389/fsufs.2021.605195] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Bacillus spp. are well-characterized as efficient bioinoculants for sustainable plant growth promotion and biocontrol of phytopathogens. Members of this spp. exhibit the multifaceted beneficial traits that are involved in plant nutrition and antimicrobial activities against phytopathogens. Keeping in view their diverse potential, this study targeted the detailed characterization of three root-colonizing Bacillus strains namely B. amyloliquefaciens, B. subtilis, and B. tequilensis, characterized based on 16S rRNA sequencing homology. The strains exhibited better plant growth promotion and potent broad-spectrum antifungal activities and exerted 43–86% in-vitro inhibition of growth of eight fungal pathogens. All strains produced indole acetic acid (IAA) in the range of 0.067–0.147 μM and were positive for the production of extracellular enzymes such as cellulase, lipase, and protease. Ultra-performance Liquid Chromatography-Electrospray Ionization-Mass Spectrometry (UPLC-ESI-MS/MS) analysis revealed the production of antifungal metabolites (AFMs) such as surfactins, iturins, fengycins, macrolactins, bacillomycin-D, and catechol-based siderophore bacillibactin which were further confirmed by amplifying the genes involved in the biosynthesis of these antimicrobial lipopeptides. When compared for the amounts of different cyclic-peptides produced by three Bacillus strains, B. amyloliquefaciens SB-1 showed the most noticeable amounts of all the antifungal compounds. Plant experiment results revealed that inoculation with phytohormone producing Bacillus spp. strains demonstrated substantial growth improvement of wheat biomass, number of spikes, and dry weight of shoots and roots. Results of this study indicate the biocontrol and biofertilizer potential of Bacillus spp. for sustainable plant nutrient management, growth promotion, and effective biocontrol of crop plants, particularly cultivated in the South Asian region.
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Choub V, Maung CEH, Won SJ, Moon JH, Kim KY, Han YS, Cho JY, Ahn YS. Antifungal Activity of Cyclic Tetrapeptide from Bacillus velezensis CE 100 against Plant Pathogen Colletotrichum gloeosporioides. Pathogens 2021; 10:pathogens10020209. [PMID: 33672094 PMCID: PMC7919652 DOI: 10.3390/pathogens10020209] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 02/07/2021] [Accepted: 02/12/2021] [Indexed: 11/20/2022] Open
Abstract
The aim of this study was to investigate the antifungal activity of a cyclic tetrapeptide from Bacillus velezensis CE 100 against anthracnose-causing fungal pathogen Colletotrichum gloeosporioides. Antifungal compound produced by B. velezensis CE 100 was isolated and purified from ethyl acetate extract of B. velezensis CE 100 culture broth using octadecylsilane column chromatography. The purified compound was identified as cyclo-(prolyl-valyl-alanyl-isoleucyl) based on mass spectrometer and nuclear magnetic resonance analyses. This is the first report of the isolation of a cyclic tetrapeptide from B. velezensis CE 100 culture filtrate. Cyclic tetrapeptide displayed strong antifungal activity at concentration of 1000 µg/mL against C. gloeosporioides mycelial growth and spore germination. Our results demonstrate that the antifungal cyclic tetrapeptide from B. velezensis CE 100 has potential in bioprotection against anthracnose disease of plants caused by C. gloeosporioides.
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Affiliation(s)
- Vantha Choub
- Department of Forest Resources, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Korea; (V.C.); (S.-J.W.); (J.-H.M.)
| | - Chaw Ei Htwe Maung
- Division of Agricultural and Biological Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Korea; (C.E.H.M.); (K.Y.K.)
| | - Sang-Jae Won
- Department of Forest Resources, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Korea; (V.C.); (S.-J.W.); (J.-H.M.)
| | - Jae-Hyun Moon
- Department of Forest Resources, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Korea; (V.C.); (S.-J.W.); (J.-H.M.)
| | - Kil Yong Kim
- Division of Agricultural and Biological Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Korea; (C.E.H.M.); (K.Y.K.)
| | - Yeon Soo Han
- Division of Plant Biotechnology, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Korea;
| | - Jeong-Yong Cho
- Department of Food Science and Technology, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Korea
- Correspondence: (J.-Y.C.); (Y.S.A.); Tel.: +82-62-530-2143 (J.-Y.C.); +82-62-530-2081 (Y.S.A.); Fax: +82-62-530-2149 (J.-Y.C.); +82-62-530-2089 (Y.S.A.)
| | - Young Sang Ahn
- Department of Forest Resources, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Korea; (V.C.); (S.-J.W.); (J.-H.M.)
- Correspondence: (J.-Y.C.); (Y.S.A.); Tel.: +82-62-530-2143 (J.-Y.C.); +82-62-530-2081 (Y.S.A.); Fax: +82-62-530-2149 (J.-Y.C.); +82-62-530-2089 (Y.S.A.)
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Del Pilar Martínez-Diz M, Díaz-Losada E, Andrés-Sodupe M, Bujanda R, Maldonado-González MM, Ojeda S, Yacoub A, Rey P, Gramaje D. Field evaluation of biocontrol agents against black-foot and Petri diseases of grapevine. PEST MANAGEMENT SCIENCE 2021; 77:697-708. [PMID: 32841479 DOI: 10.1002/ps.6064] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 06/11/2020] [Accepted: 08/25/2020] [Indexed: 05/09/2023]
Abstract
BACKGROUND Black-foot and Petri diseases are the main fungal diseases associated with young grapevine decline. Two field experiments were established to evaluate the preventive effect of two potential biocontrol agents (BCAs), that is Streptomyces sp. E1 + R4 and Pythium oligandrum Po37, and three BCA-commercial products containing Trichoderma atroviride SC1, Trichoderma koningii TK7 and Pseudomonas fluorescens + Bacillus atrophaeus on fungal infection in grafted plants and plant growth parameters. RESULTS The effectiveness of some BCA in reducing the incidence and severity of both diseases was dependent on the plant part analyzed and the plant age. No single BCA application was able to control both diseases. Streptomyces sp. E1 + R4 were able to reduce significantly the infection of the most prevalent black-foot disease fungi while P. oligandrum Po37 and Trichoderma spp. were able to reduce significantly Phaeomoniella chlamydospora and Phaeoacremonium minimum (Petri disease) infection. BCA treatments had no effect on the shoot weight, and root weight was significantly lower in all BCA treatments with respect to the control. CONCLUSIONS The combination of the disease-suppressive activity of two or more beneficial microbes in a biocontrol preparation is required to prevent infection by black-foot and Petri disease fungi in vineyards.
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Affiliation(s)
- María Del Pilar Martínez-Diz
- Estación de Viticultura e Enoloxía de Galicia (AGACAL-EVEGA), Ourense, Spain
- Facultade de Ciencias, Universidade da Coruña, A Coruña, Spain
| | - Emilia Díaz-Losada
- Estación de Viticultura e Enoloxía de Galicia (AGACAL-EVEGA), Ourense, Spain
| | - Marcos Andrés-Sodupe
- Instituto de Ciencias de la Vid y del Vino (ICVV), Consejo Superior de Investigaciones Científicas, Universidad de la Rioja, Gobierno de La Rioja, Logroño, Spain
| | - Rebeca Bujanda
- Instituto de Ciencias de la Vid y del Vino (ICVV), Consejo Superior de Investigaciones Científicas, Universidad de la Rioja, Gobierno de La Rioja, Logroño, Spain
| | - María M Maldonado-González
- Instituto de Ciencias de la Vid y del Vino (ICVV), Consejo Superior de Investigaciones Científicas, Universidad de la Rioja, Gobierno de La Rioja, Logroño, Spain
| | - Sonia Ojeda
- Instituto de Ciencias de la Vid y del Vino (ICVV), Consejo Superior de Investigaciones Científicas, Universidad de la Rioja, Gobierno de La Rioja, Logroño, Spain
| | - Amira Yacoub
- INRA, ISVV, UMR1065 SAVE, Villenave d'Ornon, France
| | - Patrice Rey
- INRA, ISVV, UMR1065 SAVE, Villenave d'Ornon, France
| | - David Gramaje
- Instituto de Ciencias de la Vid y del Vino (ICVV), Consejo Superior de Investigaciones Científicas, Universidad de la Rioja, Gobierno de La Rioja, Logroño, Spain
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Chacón-López A, Guardado-Valdivia L, Bañuelos-González M, López-García U, Montalvo-González E, Arvizu-Gómez J, Stoll A, Aguilera S. Effect of Metabolites Produced by Bacillus atrophaeus and Brevibacterium frigoritolerans Strains on Postharvest Biocontrol of Alternaria alternata in Tomato (Solanum lycopersicum L.). Biocontrol Sci 2021; 26:67-74. [PMID: 34092716 DOI: 10.4265/bio.26.67] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
In the present study, the antifungal activity of metabolites produced by Bacillus atrophaeus B5 and a new Brevibacterium strain against Alternaria alternata was evaluated. Assays in vitro and in vivo on tomato fruit during postharvest were made. Based on the 16S rDNA gene sequence analysis, the new strain (strain B7) was identified as Brevibacterium frigoritolerans. Metabolites produced by both bacterial strains reduced the spore germination of A. alternata in vitro and decreased the severity of the alternaria rot disease on tomato fruit during postharvest. This is the first report that demonstrates the potential of B. frigoritolerans B7 as a biocontrol agent against this fungal phytopathogen. The use of metabolites produced by B. atrophaeus B5 and B. frigoritolerans B7 represents a new approach to reduce the use of chemical pesticides and control fungal decay during the postharvest stage.
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Affiliation(s)
- Alejandra Chacón-López
- Laboratorio Integral de Investigación en Alimentos/Departamento de Química y Bioquímica, Tecnológico Nacional de México-Instituto de Tepic
| | - Lizeth Guardado-Valdivia
- Laboratorio Integral de Investigación en Alimentos/Departamento de Química y Bioquímica, Tecnológico Nacional de México-Instituto de Tepic
| | - Miriam Bañuelos-González
- Laboratorio Integral de Investigación en Alimentos/Departamento de Química y Bioquímica, Tecnológico Nacional de México-Instituto de Tepic
| | - Ulises López-García
- Laboratorio Integral de Investigación en Alimentos/Departamento de Química y Bioquímica, Tecnológico Nacional de México-Instituto de Tepic
| | - Efigenia Montalvo-González
- Laboratorio Integral de Investigación en Alimentos/Departamento de Química y Bioquímica, Tecnológico Nacional de México-Instituto de Tepic
| | - Jackeline Arvizu-Gómez
- Centro Nayarita de Innovación y Transferencia de Tecnología, Universidad Autónoma de Nayarit
| | | | - Selene Aguilera
- Laboratorio Integral de Investigación en Alimentos/Departamento de Química y Bioquímica, Tecnológico Nacional de México-Instituto de Tepic
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30
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Ling L, Zhao Y, Tu Y, Yang C, Ma W, Feng S, Lu L, Zhang J. The inhibitory effect of volatile organic compounds produced by Bacillus subtilis CL2 on pathogenic fungi of wolfberry. J Basic Microbiol 2020; 61:110-121. [PMID: 33368461 DOI: 10.1002/jobm.202000522] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 10/25/2020] [Accepted: 12/11/2020] [Indexed: 11/09/2022]
Abstract
Bacillus subtilis strain CL2 is antagonistic to wolfberry postharvest pathogenic fungi. In this study, we isolated and screened this strain for in vitro experiments. The result of the two-sealed-base-plates method revealed that volatile organic compounds (VOCs) emitted from the strain CL2 inhibited the hyphal growth of four pathogenic fungi Mucor circinelloides LB1, Fusarium arcuatisporum LB5, Alternaria iridiaustralis LB7, and Colletotrichum fioriniae LB8. After exposure to VOCs for 5 days, the hyphal growth of the pathogen C. fioriniae LB8 was inhibited by 73%. Scanning electron microscopy revealed that the VOCs produced by B. subtilis CL2 caused the mycelium morphology of the pathogenic fungi to deform, twist, fold, and shrink. In the in vivo experiments, we noticed that VOCs could significantly reduce the weight loss rate of wolfberry fruits caused by the pathogenic fungus M. circinelloides LB1 and that the decay incidence rate were caused by the pathogenic fungi F. arcuatisporum LB5, A. iridiaustralis LB7, and C. fioriniae LB8. On the basis of the headspace-gas chromatography-ion mobility spectrometry analysis, seven VOCs produced by strain CL2 were identified. Among them, 2,3-butanedione and 3-methylbutyric acid are the main antifungal active substances. This study investigated the antifungal properties of VOCs produced by the strain CL2 on postharvest pathogenic fungi isolated from wolfberry fruits both in vivo and in vitro, thereby providing the theoretical basis for its future applications.
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Affiliation(s)
- Lijun Ling
- College of Life Science, Northwest Normal University, Lanzhou, China.,Bioactive Products Engineering Research Center for Gansu Distinctive Plants, Northwest Normal University, Lanzhou, China
| | - Yunhua Zhao
- College of Life Science, Northwest Normal University, Lanzhou, China
| | - Yixin Tu
- College of Life Science, Northwest Normal University, Lanzhou, China
| | - Caiyun Yang
- College of Life Science, Northwest Normal University, Lanzhou, China
| | - Wenxia Ma
- College of Life Science, Northwest Normal University, Lanzhou, China
| | - Shenglai Feng
- College of Life Science, Northwest Normal University, Lanzhou, China
| | - Lu Lu
- College of Life Science, Northwest Normal University, Lanzhou, China
| | - Ji Zhang
- College of Life Science, Northwest Normal University, Lanzhou, China.,Bioactive Products Engineering Research Center for Gansu Distinctive Plants, Northwest Normal University, Lanzhou, China
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Kang BR, Park JS, Jung WJ. Antifungal evaluation of fengycin isoforms isolated from Bacillus amyloliquefaciens PPL against Fusarium oxysporum f. sp. lycopersici. Microb Pathog 2020; 149:104509. [DOI: 10.1016/j.micpath.2020.104509] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 07/28/2020] [Accepted: 09/16/2020] [Indexed: 02/07/2023]
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Zhang X, Guo X, Wu C, Li C, Zhang D, Zhu B. Isolation, heterologous expression, and purification of a novel antifungal protein from Bacillus subtilis strain Z-14. Microb Cell Fact 2020; 19:214. [PMID: 33228718 PMCID: PMC7684727 DOI: 10.1186/s12934-020-01475-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 11/13/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Wheat sheath blight, a soil borne fungal disease caused by Rhizoctonia cerealis, is considered as one of the most serious threats to wheat worldwide. Bacillus subtilis Z-14 was isolated from soil sampled from a wheat rhizosphere and was confirmed to have strong antifungal activity against R. cerealis. RESULTS An antifungal protein, termed F2, was isolated from the culture supernatant of Z-14 strain using precipitation with ammonium sulfate, anion exchange chromatography, and reverse phase chromatography. Purified F2 had a molecular mass of approximately 8 kDa, as assessed using sodium dodecyl sulfate polyacrylamide gel electrophoresis. Edman degradation was used to determine the amino acid sequence of the N-terminus, which was NH2ASGGTVGIYGANMRS. This sequence is identical to a hypothetical protein RBAM_004680 (YP_001420098.1) synthesized by B. amyloliquefaciens FZB42. The recombinant F2 protein (rF2) was heterologously expressed in the yeast host Pichia pastoris, purified using a Niaffinity column, and demonstrated significant antifungal activity against R. cerealis. The purified rF2 demonstrated broad spectrum antifungal activity against different varieties of fungi such as Fusarium oxysporum, Verticillium dahliae, Bipolaris papendorfii, and Fusarium proliferatum. rF2 was thermostable, retaining 91.5% of its activity when incubated for 30 min at 100 °C. Meanwhile, rF2 maintained its activity under treatment by proteinase K and trypsin and over a wide pH range from 5 to 10. CONCLUSIONS A novel antifungal protein, F2, was purified from biocontrol Bacillus subtilis Z-14 strain fermentation supernatant and heterologously expressed in Pichia pastoris to verify its antifungal activity against R. cerealis and the validity of the gene encoding F2. Considering its significant antifungal activity and stable characteristics, protein F2 presents an alternative compound to resist fungal infections caused by R. cerealis.
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Affiliation(s)
- Xuechao Zhang
- College of Life Science, Hebei Agricultural University, 289 Lingyusi Road, 071001, Baoding, PR China
| | - Xiaojun Guo
- College of Life Science, Hebei Agricultural University, 289 Lingyusi Road, 071001, Baoding, PR China
| | - Cuihong Wu
- College of Life Science, Hebei Agricultural University, 289 Lingyusi Road, 071001, Baoding, PR China
| | - Chengcui Li
- College of Life Science, Hebei Agricultural University, 289 Lingyusi Road, 071001, Baoding, PR China
| | - Dongdong Zhang
- College of Life Science, Hebei Agricultural University, 289 Lingyusi Road, 071001, Baoding, PR China.
| | - Baocheng Zhu
- College of Life Science, Hebei Agricultural University, 289 Lingyusi Road, 071001, Baoding, PR China.
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Efe D. Potential Plant Growth-Promoting Bacteria with Heavy Metal Resistance. Curr Microbiol 2020; 77:3861-3868. [PMID: 32960302 DOI: 10.1007/s00284-020-02208-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 09/09/2020] [Indexed: 11/30/2022]
Abstract
Plant growth-promoting (PGP) bacteria commonly have many strategies to cope with heavy metal toxicity. Heavy metal-resistant PGP bacteria can be used to improve the growth of plants in heavy metal contaminated soils. In this study, the soil samples were collected from the lead-zinc mineral deposits in Gümüşhane Province, Turkey. Nine bacterial isolates were obtained on the nutrient agar medium supplemented with 100 mg/mL zinc and lead. All of the isolates were screened in terms of plant growth-promoting characteristics including production of indole-3-acetic acid and siderophore, nitrogen fixation and phosphate solubilisation. Nine bacteria were identified as Bacillus cereus, Bacillus atrophaeus, Bacillus pumilus, Bacillus amyloliquefaciens, Bacillus tropicus, Bacillus subtilis, Bacillus halotolerans, Bacillus vallismortis, and Enterococcus mundtii by classical and 16S rDNA-PCR assays. In addition, these isolates were evaluated for their response to three heavy metals (lead, zinc, copper) dominant in the soil samples and minimal inhibitory concentration (MIC) of the heavy metals was determined with plate dilution method. Consequently, the bacterial isolates in this study possess plant growth-promoting traits and can ameliorate heavy metal contaminated soil. E. mundtii was reported to be found in heavy metal contaminated soil for the first time. This study is the first report about PGP characteristics (IAA production and phosphate solubilisation) of B. vallismortis.
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Affiliation(s)
- Derya Efe
- Department of Medicinal and Aromatic Plants, Espiye Vocational School, Giresun University, 28000, Giresun, Turkey.
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Geetha Thanuja K, Annadurai B, Thankappan S, Uthandi S. Non-rhizobial endophytic (NRE) yeasts assist nodulation of Rhizobium in root nodules of blackgram (Vigna mungo L.). Arch Microbiol 2020; 202:2739-2749. [PMID: 32737540 DOI: 10.1007/s00203-020-01983-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 06/25/2020] [Accepted: 07/14/2020] [Indexed: 10/23/2022]
Abstract
The signal orchestration between legumes and the rhizobia attribute to symbiotic nitrogen fixation through nodule formation. Root nodules serve as a nutrient-rich reservoir and harbor diverse microbial communities. However, the existence of non-rhizobial endophytes (NRE) and their role inside the root nodules are being explored; there is no evidence on yeast microflora inhabiting nodule niche. This study focused on unraveling the presence of yeast in the root nodules and their possible function in either nodulation or signal exchange. From the root nodules of blackgram, two yeast strains were isolated and identified as Candida glabrata VYP1 and Candida tropicalis VYW1 based on 18S rRNA gene sequencing and phylogeny. These strains possessed plant growth-promoting traits viz., IAA, ACC deaminase, siderophore, ammonia, and polyamine production. The functional capacity of endophytic yeast strains, and their interaction with Rhizobium sp. was further unveiled via profiling volatile organic compounds (VOC). Among the VOCs, α-glucopyranoside and pyrroloquinoline pitches a pivotal role in activating lectin pathways and phosphorous metabolism. Further, lectin pathways are crucial for nodulating bacterium, and our study showed that these endophytic yeasts assist nodulation by Rhizobium sp. via activating the nod factors. The plant growth-promoting traits of NRE yeast strains coupled with their metabolite production, could recruit them as potential drivers in the plant-microbe interaction.
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Affiliation(s)
- Kalyanasundaram Geetha Thanuja
- Biocatalysts Laboratory, Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, 641003, India
| | - Brundha Annadurai
- Biocatalysts Laboratory, Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, 641003, India
| | - Sugitha Thankappan
- Biocatalysts Laboratory, Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, 641003, India
| | - Sivakumar Uthandi
- Biocatalysts Laboratory, Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, 641003, India.
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He CN, Ye WQ, Zhu YY, Zhou WW. Antifungal Activity of Volatile Organic Compounds Produced by Bacillus methylotrophicus and Bacillus thuringiensis against Five Common Spoilage Fungi on Loquats. Molecules 2020; 25:molecules25153360. [PMID: 32722108 PMCID: PMC7436122 DOI: 10.3390/molecules25153360] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 07/16/2020] [Accepted: 07/22/2020] [Indexed: 12/14/2022] Open
Abstract
Loquat fruit is one of the most perishable fruits in China, and has a very limited shelf life because of mechanical injury and microbial decay. Due to an increasing concern about human health and environmental security, antagonistic microorganisms have been a potential alternative for fungicides to control postharvest diseases. In this work, the antifungal effect of volatile organic compounds (VOCs) produced by Bacillus methylotrophicus BCN2 and Bacillus thuringiensis BCN10 against five postharvest pathogens isolated from loquat fruit, Fusarium oxysporum, Botryosphaeria sp., Trichoderma atroviride, Colletotrichum gloeosporioides, and Penicillium expansum were evaluated by in vitro and in vivo experiments. As a result, the VOCs released by BCN2 and BCN10 were able to suppress the mycelial growth of all targeted pathogens according to inhibition ratio in the double petri-dish assay as well as disease incidence and disease diameter on loquat fruits. The main volatile compounds were identified by solid-phase microextraction (SPME)-gas chromatography. These VOCs produced by the two strains played complementary roles in controlling these five molds and enabled loquat fruits to keep fresh for ten days, significantly. This research will provide a theoretic foundation and technical support for exploring the functional components of VOCs applicable in loquat fruit preservation.
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Alasmar R, Ul-Hassan Z, Zeidan R, Al-Thani R, Al-Shamary N, Alnaimi H, Migheli Q, Jaoua S. Isolation of a Novel Kluyveromyces marxianus Strain QKM-4 and Evidence of Its Volatilome Production and Binding Potentialities in the Biocontrol of Toxigenic Fungi and Their Mycotoxins. ACS OMEGA 2020; 5:17637-17645. [PMID: 32715249 PMCID: PMC7377640 DOI: 10.1021/acsomega.0c02124] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 06/26/2020] [Indexed: 06/11/2023]
Abstract
To overcome the economic losses associated with fungi and their toxic metabolites, environmentally safe and efficient approaches are needed. To this end, biological control using yeasts and safe bacterial strains and their products are being explored to replace synthetic fungicides. In the present study, the biocontrol effect of a yeast strain of Kluyveromyces marxianus, QKM-4, against the growth and mycotoxin synthesis potential of key toxigenic fungi was evaluated. In vitro assays were performed to find the application of yeast volatile organic compounds (VOCs) against fungal contamination on important agricultural commodities. The removal of ochratoxin A (OTA) and deoxynivalenol (DON) by living and heat-inactivated yeast cells was also explored. VOCs produced by strain QKM-4 were able to significantly limit the fungal growth of 17 fungal species belonging to genera Aspergillus, Penicillium, and Fusarium. Yeast VOCs were able to reduce OTA biosynthesis potential of Penicillium verrucosum and Aspergillus carbonarius by 99.6 and 98.7%, respectively. In vivo application of QKM-4 VOCs against Fusarium oxysporum and A. carbonarius infection on tomatoes and grapes, respectively, determined a complete inhibition of fungal spore germination. GC/MS-based analysis of yeast VOCs identified long-chain alkanes, including nonadecane, eicosane, docosane, heptacosane, hexatriacontane, and tetracosane. In vitro testing of the mycotoxin-binding potential of the living and heat-inactivated QKM-4 cells showed a reduction of OTA and DON up to 58 and 49%, respectively, from artificially contaminated buffers. Our findings clearly demonstrate the strong antifungal potential of K. marxianus QKM-4 and propose this strain as a strong candidate for application in agriculture to safeguard food and feed products.
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Affiliation(s)
- Reem Alasmar
- Department
of Biological and Environmental Sciences, College of Arts
and Science and Environmental Science Center, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Zahoor Ul-Hassan
- Department
of Biological and Environmental Sciences, College of Arts
and Science and Environmental Science Center, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Randa Zeidan
- Department
of Biological and Environmental Sciences, College of Arts
and Science and Environmental Science Center, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Roda Al-Thani
- Department
of Biological and Environmental Sciences, College of Arts
and Science and Environmental Science Center, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Noora Al-Shamary
- Department
of Biological and Environmental Sciences, College of Arts
and Science and Environmental Science Center, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Hajer Alnaimi
- Department
of Biological and Environmental Sciences, College of Arts
and Science and Environmental Science Center, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Quirico Migheli
- Dipartimento
di Agraria, Università degli Studi
di Sassari, Viale Italia 39, I-07100 Sassari, Italy
| | - Samir Jaoua
- Department
of Biological and Environmental Sciences, College of Arts
and Science and Environmental Science Center, Qatar University, P.O. Box 2713, Doha, Qatar
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Mülner P, Schwarz E, Dietel K, Junge H, Herfort S, Weydmann M, Lasch P, Cernava T, Berg G, Vater J. Profiling for Bioactive Peptides and Volatiles of Plant Growth Promoting Strains of the Bacillus subtilis Complex of Industrial Relevance. Front Microbiol 2020; 11:1432. [PMID: 32695084 PMCID: PMC7338577 DOI: 10.3389/fmicb.2020.01432] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Accepted: 06/02/2020] [Indexed: 12/14/2022] Open
Abstract
Plant growth promoting rhizobacteria attain increasing importance in agriculture as biofertilizers and biocontrol agents. These properties significantly depend on the formation of bioactive compounds produced by such organisms. In our work we investigated the biosynthetic potential of 13 industrially important strains of the Bacillus subtilis complex by mass spectrometric methodology. Typing of these organisms was performed with MALDI-TOF mass spectrometry followed by comprehensive profiling of their bioactive peptide products. Volatiles were determined by gas chromatography-mass spectrometry. Representative products of the members of the B. subtilis complex investigated in detail were: the surfactin familiy (surfactins, lichenysins, pumilacidins); the iturin family (iturins, mycosubtilins and bacillomycins); plantazolicin and the dual lantibiotics lichenicidins, as well as a wide spectrum of volatiles, such as hydrocarbons (alkanes/alkenes), alcohols, ketones, sulfur-containing compounds and pyrazines. The subcomplexes of the B. subtilis organizational unit; (a) B. subtilis/Bacillus atrophaeus; (b) B. amyloliquefaciens/B. velezensis; (c) B. licheniformis, and (d) B. pumilus are equipped with specific sets of these compounds which are the basis for the evaluation of their biotechnological and agricultural usage. The 13 test strains were evaluated in field trials for growth promotion of potato and maize plants. All of the implemented strains showed efficient growth stimulation of these plants. The highest effects were obtained with B. velezensis, B. subtilis, and B. atrophaeus strains.
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Affiliation(s)
- Pascal Mülner
- ABiTEP GmbH, Berlin, Germany
- Institute of Environmental Biotechnology, Graz University of Technology, Graz, Austria
| | | | | | | | - Stefanie Herfort
- ZBS6: Proteomics and Spectroscopy, Robert Koch-Institut, Berlin, Germany
| | - Max Weydmann
- ZBS6: Proteomics and Spectroscopy, Robert Koch-Institut, Berlin, Germany
| | - Peter Lasch
- ZBS6: Proteomics and Spectroscopy, Robert Koch-Institut, Berlin, Germany
| | - Tomislav Cernava
- Institute of Environmental Biotechnology, Graz University of Technology, Graz, Austria
| | - Gabriele Berg
- Institute of Environmental Biotechnology, Graz University of Technology, Graz, Austria
| | - Joachim Vater
- ABiTEP GmbH, Berlin, Germany
- ZBS6: Proteomics and Spectroscopy, Robert Koch-Institut, Berlin, Germany
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Zhang D, Yu S, Yang Y, Zhang J, Zhao D, Pan Y, Fan S, Yang Z, Zhu J. Antifungal Effects of Volatiles Produced by Bacillus subtilis Against Alternaria solani in Potato. Front Microbiol 2020; 11:1196. [PMID: 32625175 PMCID: PMC7311636 DOI: 10.3389/fmicb.2020.01196] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 05/12/2020] [Indexed: 11/30/2022] Open
Abstract
Antifungal activities of plant-beneficial Bacillus have been widely studied in recent years. Numerous studies have studied the antifungal mechanisms of soluble non-volatile bioactive compounds such as lipopeptides and proteins produced by Bacillus against soil-borne diseases. However, the antagonistic mechanisms of volatile organic compounds (VOCs) from Bacillus against airborne phytopathogens are still largely unknown, and the function of Alternaria solani pathogenic genes has not been well identified. Here, we first isolated a Bacillus strain with strong antifungal activity and finally identified it as B. subtilis ZD01. Then, the antagonistic mechanisms of VOCs produced by strain ZD01, against A. solani, an airborne fungal pathogen that can cause early blight diseases of potato, were studied. We showed that VOCs produced by strain ZD01 can reduce the colony size and mycelial penetration and can cause serious morphological changes of A. solani. Scanning electron microscope (SEM) observation showed that VOCs released by ZD01 could cause more flaccid and gapped hyphae of A. solani. Also, we found that VOCs produced by ZD01 can inhibit the conidia germination and reduce the lesion areas and number of A. solani in vivo significantly. Meanwhile, based on gas chromatography/mass spectrometry (GC/MS) analysis, 29 volatile compounds produced by strain ZD01 were identified. Out of 29 identified VOCs, 9 VOCs showed complete growth inhibition activities against A. solani. Moreover, we identified two virulence-associated genes (slt2 and sod) in A. solani. slt2 is a key gene that regulates the mycelial growth, penetration, sporulation, and virulence in vivo in A. solani. In addition, sod plays a significant role in the SOD synthetic pathway in A. solani. Results from qRT-PCR showed that the transcriptional expression of these two genes was down-regulated after being treated by VOCs produced by ZD01. These results are useful for a better understanding of the biocontrol mechanism of Bacillus and offer a potential method for potato early blight disease control.
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Affiliation(s)
- Dai Zhang
- College of Plant Protection, Hebei Agricultural University, Baoding, China
| | - Shuiqing Yu
- College of Plant Protection, Hebei Agricultural University, Baoding, China
| | - Yiqing Yang
- College of Plant Protection, Hebei Agricultural University, Baoding, China
| | - Jinglin Zhang
- Beijing Laboratory for Food Quality and Safety, Beijing Technology and Business University, Beijing, China
| | - Dongmei Zhao
- College of Plant Protection, Hebei Agricultural University, Baoding, China
| | - Yang Pan
- College of Plant Protection, Hebei Agricultural University, Baoding, China
| | - Shasha Fan
- College of Plant Protection, Hebei Agricultural University, Baoding, China
| | - Zhihui Yang
- College of Plant Protection, Hebei Agricultural University, Baoding, China
| | - Jiehua Zhu
- College of Plant Protection, Hebei Agricultural University, Baoding, China
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Liu A, Zhang P, Bai B, Bai F, Jin T, Ren J. Volatile Organic Compounds of Endophytic Burkholderia pyrrocinia Strain JK-SH007 Promote Disease Resistance in Poplar. PLANT DISEASE 2020; 104:1610-1620. [PMID: 32271644 DOI: 10.1094/pdis-11-19-2366-re] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Volatile organic compounds (VOCs) play important roles in the regulation of plant growth and pathogen resistance. However, little is known about the influence of VOCs released from endophytic strains (Burkholderia pyrrocinia strain JK-SH007) on controlling pathogens or inducing systemic resistance in poplar. In this study, we found that VOCs produced by strain JK-SH007 inhibit three poplar canker pathogens (Cytospora chrysosperma, Phomopsis macrospora, and Fusicoccum aesculi) and promote defense enzyme activity and malondialdehyde (MDA) and total phenol (TP) accumulation. Thirteen kinds of VOC components were identified using the solid-phase microextraction combined with gas chromatography-mass spectrometry method. Dimethyl disulfide (DMDS) accounted for the largest proportion of these VOCs. Treatments of poplar seedlings with different volumes of VOC standards (DMDS, benzothiazole, dimethylthiomethane, and phenylacetone) showed that DMDS had the greatest effects on various defense enzyme activities and MDA and TP accumulation. We also found that the inhibitory effect of the VOCs on the three pathogens was gradually enhanced with increasing standard volume. Moreover, the treatment of samples with DMDS significantly reduced the severity and development of the disease caused by three poplar canker pathogens. Comparative transcriptomics analysis of poplar seedlings treated with DMDS showed that there were 1,586 differentially expressed genes in the leaves and stems, and quantitative PCR showed that the gene expression trends were highly consistent with the transcriptome sequencing results. The most significant transcriptomic changes induced by VOCs were related to hormone signal transduction, transcriptional regulation of plant-pathogen interactions, and energy metabolism. Moreover, 137 transcription factors, including members of the ethylene response factor, NAC, WRKY, G2-like, and basic helix-loop-helix protein families, were identified to be involved in the VOC-induced process. This study elucidates the resistance induced by Burkholderia pyrrocinia strain JK-SH007 to poplar canker at the molecular level and can make possible a new method for the comprehensive prevention and control of poplar disease.
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Affiliation(s)
- Ake Liu
- Faculty of Biology Science and Technology, Changzhi University, Shanxi 046011, China
| | - Pengfei Zhang
- Faculty of Biology Science and Technology, Changzhi University, Shanxi 046011, China
| | - Bianxia Bai
- Faculty of Biology Science and Technology, Changzhi University, Shanxi 046011, China
| | - Fenglin Bai
- Faculty of Biology Science and Technology, Changzhi University, Shanxi 046011, China
| | - Tingting Jin
- Faculty of Biology Science and Technology, Changzhi University, Shanxi 046011, China
| | - Jiahong Ren
- Faculty of Biology Science and Technology, Changzhi University, Shanxi 046011, China
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Mechanism of Antibacterial Activity of Bacillus amyloliquefaciens C-1 Lipopeptide toward Anaerobic Clostridium difficile. BIOMED RESEARCH INTERNATIONAL 2020; 2020:3104613. [PMID: 32190658 PMCID: PMC7073505 DOI: 10.1155/2020/3104613] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 01/13/2020] [Accepted: 02/04/2020] [Indexed: 02/06/2023]
Abstract
Probiotics may offer an attractive alternative for standard antibiotic therapy to treat Clostridium difficile infections (CDI). In this study, the antibacterial mechanism in vitro of newly isolated B. amyloliquefaciens C-1 against C. difficile was investigated. The lipopeptides surfactin, iturin, and fengycin produced by C-1 strongly inhibited C. difficile growth and viability. Systematic research of the bacteriostatic mechanism showed that the C-1 lipopeptides damage the integrity of the C. difficile cell wall and cell membrane. In addition, the lipopeptide binds to C. difficile genomic DNA, leading to cell death. Genome resequencing revealed many important antimicrobial compound-encoding clusters, including six nonribosomal peptides (surfactins (srfABCD), iturins (ituABCD), fengycins (fenABCDE), bacillibactin (bmyABC), teichuronic, and bacilysin) and three polyketides (bacillaene (baeEDLMNJRS), difficidin (difABCDEFGHIJ), and macrolactin (mlnABCDEFGHI)). In addition, there were other beneficial genes, such as phospholipase and seven siderophore biosynthesis gene clusters, which may contribute synergistically to the antibacterial activity of B. amyloliquefaciens C-1. We suggest that proper application of antimicrobial peptides may be effective in C. difficile control.
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Penha RO, Vandenberghe LPS, Faulds C, Soccol VT, Soccol CR. Bacillus lipopeptides as powerful pest control agents for a more sustainable and healthy agriculture: recent studies and innovations. PLANTA 2020; 251:70. [PMID: 32086615 DOI: 10.1007/s00425-020-03357-7] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Accepted: 02/05/2020] [Indexed: 05/27/2023]
Abstract
Lipopeptides could help to overcome a large concern in agriculture: resistance against chemical pesticides. These molecules have activity against various phytopathogens and a potential to be transformed by genetic engineering. The exponential rise of pest resistances to different chemical pesticides and the global appeal of consumers for a sustainable agriculture and healthy nutrition have led to the search of new solutions for pest control. Furthermore, new laws require a different stance of producers. Based on that, bacteria of the genus Bacillus present a great agricultural potential, producing lipopeptides (LPs) that have high activity against insects, mites, nematodes, and/or phytopathogens that are harmful to plant cultures. Biopesticide activity can be found mainly in three families of Bacillus lipopeptides: surfactin, iturin, and fengycin. These molecules have an amphiphilic nature, interfering with biological membrane structures. Their antimicrobial properties include activity against bacteria, fungi, oomycetes, and viruses. Recent studies also highlight the ability of these compounds to stimulate defense mechanisms of plants and biofilm formation, which is a key factor for the successful colonization of biocontrol organisms. The use of molecular biology has also recently been researched for continuous advances and discoveries of new LPs, avoiding possible future problems of resistance against these molecules. As a consequence of the properties and possibilities of LPs, numerous studies and developments as well as the attention of large companies in the field is expected in the near future.
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Affiliation(s)
- Rafaela O Penha
- Bioprocess Engineering and Biotechnology Department, Federal University of Paraná, Centro Politécnico, CP 19011, Curitiba, PR, 81531-908, Brazil
| | - Luciana P S Vandenberghe
- Bioprocess Engineering and Biotechnology Department, Federal University of Paraná, Centro Politécnico, CP 19011, Curitiba, PR, 81531-908, Brazil
| | - Craig Faulds
- Aix-Marseille Université, POLYTECH Marseille, UMR 1163 Biotechnologie Des Champignons Filamenteux, 163 Avenue de Luminy, 13288, Marseille Cedex 09, France
| | - Vanete T Soccol
- Bioprocess Engineering and Biotechnology Department, Federal University of Paraná, Centro Politécnico, CP 19011, Curitiba, PR, 81531-908, Brazil
| | - Carlos R Soccol
- Bioprocess Engineering and Biotechnology Department, Federal University of Paraná, Centro Politécnico, CP 19011, Curitiba, PR, 81531-908, Brazil.
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Tilocca B, Cao A, Migheli Q. Scent of a Killer: Microbial Volatilome and Its Role in the Biological Control of Plant Pathogens. Front Microbiol 2020; 11:41. [PMID: 32117096 PMCID: PMC7018762 DOI: 10.3389/fmicb.2020.00041] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 01/09/2020] [Indexed: 11/29/2022] Open
Abstract
The use of synthetic fungicides represents the most common strategy to control plant pathogens. Excessive and/or long-term distribution of chemicals is responsible for increased levels of environmental pollution, as well as adverse health consequence to humans and animals. These issues are deeply influencing public perception, as reflected by the increasing demand for safer and eco-friendly agricultural commodities and their by-products. A steadily increasing number of research efforts is now devoted to explore the use of safer and innovative approaches to control plant pathogens. The use of microorganisms as biological control agents (BCAs) represents one of the most durable and promising strategies. Among the panoply of microbial mechanisms exerted by BCAs, the production of volatile organic compounds (VOCs) represents an intriguing issue, mostly exploitable in circumstances where a direct contact between the pathogen and its antagonist is not practicable. VOCs are potentially produced by all living microorganisms, and may be active in the biocontrol of phytopathogenic oomycetes, fungi, and bacteria by means of antimicrobial activity and/or other cross-talk interactions. Their biological effects, the reduced residuals in the environment and on agricultural commodities, and the ease of application in different agricultural systems make the use of VOCs a promising and sustainable approach to replace synthetic fungicides in the control of plant pathogens. In this review, we focus on VOCs produced by bacteria and fungi and on their role in the cross-talk existing between the plant pathogens and their host. Biologic systemic effect of the microbial volatile blends on both pathogen and host plant cells is also briefly reviewed.
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Affiliation(s)
- Bruno Tilocca
- Department of Health Sciences, University “Magna Græcia” of Catanzaro, Catanzaro, Italy
- Dipartimento di Agraria and NRD-Nucleo di Ricerca sulla Desertificazione, Università degli Studi di Sassari, Sassari, Italy
| | - Aocheng Cao
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Quirico Migheli
- Dipartimento di Agraria and NRD-Nucleo di Ricerca sulla Desertificazione, Università degli Studi di Sassari, Sassari, Italy
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Bruisson S, Zufferey M, L'Haridon F, Trutmann E, Anand A, Dutartre A, De Vrieze M, Weisskopf L. Endophytes and Epiphytes From the Grapevine Leaf Microbiome as Potential Biocontrol Agents Against Phytopathogens. Front Microbiol 2019; 10:2726. [PMID: 31849878 PMCID: PMC6895011 DOI: 10.3389/fmicb.2019.02726] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 11/08/2019] [Indexed: 01/31/2023] Open
Abstract
Plants harbor diverse microbial communities that colonize both below-ground and above-ground organs. Some bacterial members of these rhizosphere and phyllosphere microbial communities have been shown to contribute to plant defenses against pathogens. In this study, we characterize the pathogen-inhibiting potential of 78 bacterial isolates retrieved from endophytic and epiphytic communities living in the leaves of three grapevine cultivars. We selected two economically relevant pathogens, the fungus Botrytis cinerea causing gray mold and the oomycete Phytophthora infestans, which we used as a surrogate for Plasmopara viticola causing downy mildew. Our results showed that epiphytic isolates were phylogenetically more diverse than endophytic isolates, the latter mostly consisting of Bacillus and Staphylococcus strains, but that mycelial inhibition of both pathogens through bacterial diffusible metabolites was more widespread among endophytes than among epiphytes. Six closely related Bacillus strains induced strong inhibition (>60%) of Botrytis cinerea mycelial growth. Among these, five led to significant perturbation in spore germination, ranging from full inhibition to reduction in germination rate and germ tube length. Different types of spore developmental anomalies were observed for different strains, suggesting multiple active compounds with different modes of action on this pathogen. Compared with B. cinerea, the oomycete P. infestans was inhibited in its mycelial growth by a higher number and more diverse group of isolates, including many Bacillus but also Variovorax, Pantoea, Staphylococcus, Herbaspirillum, or Sphingomonas strains. Beyond mycelial growth, both zoospore and sporangia germination were strongly perturbed upon exposure to cells or cell-free filtrates of selected isolates. Moreover, three strains (all epiphytes) inhibited the pathogen's growth via the emission of volatile compounds. The comparison of the volatile profiles of two of these active strains with those of two phylogenetically closely related, inactive strains led to the identification of molecules possibly involved in the observed volatile-mediated pathogen growth inhibition, including trimethylpyrazine, dihydrochalcone, and L-dihydroxanthurenic acid. This work demonstrates that grapevine leaves are a rich source of bacterial antagonists with strong inhibition potential against two pathogens of high economical relevance. It further suggests that combining diffusible metabolite-secreting endophytes with volatile-emitting epiphytes might be a promising multi-layer strategy for biological control of above-ground pathogens.
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Affiliation(s)
| | - Mónica Zufferey
- Department of Biology, University of Fribourg, Fribourg, Switzerland
| | | | - Eva Trutmann
- Department of Biology, University of Fribourg, Fribourg, Switzerland
| | - Abhishek Anand
- Department of Biology, University of Fribourg, Fribourg, Switzerland
| | - Agnès Dutartre
- Department of Biology, University of Fribourg, Fribourg, Switzerland
| | - Mout De Vrieze
- Department of Biology, University of Fribourg, Fribourg, Switzerland
| | - Laure Weisskopf
- Department of Biology, University of Fribourg, Fribourg, Switzerland
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Liu Y, Teng K, Wang T, Dong E, Zhang M, Tao Y, Zhong J. Antimicrobial Bacillus velezensis HC6: production of three kinds of lipopeptides and biocontrol potential in maize. J Appl Microbiol 2019; 128:242-254. [PMID: 31559664 DOI: 10.1111/jam.14459] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Revised: 09/05/2019] [Accepted: 09/15/2019] [Indexed: 11/28/2022]
Abstract
AIMS To study the antimicrobial agents of the Bacillus velezensis strain HC6 and assess the application potential of B. velezensis HC6 in maize. METHODS AND RESULTS We applied a dual culture technique to test the antimicrobial activity of B. velezensis HC6 against bacteria and fungi of common contaminated crops. Bacillus velezensis HC6 showed antagonistic action on pathogenic fungi, including Aspergillus and Fusarium, as well as pathogenic bacteria (especially Listeria monocytogenes). When applied in maize, B. velezensis HC6 could also inhibit the growth of multiple pathogenic fungi and reduce their production of aflatoxin and ochratoxin. Three kinds of antimicrobial lipopeptides, including iturin, fengycin and surfactin were identified in B. velezensis HC6 culture supernatant by high-performance liquid chromatography and MALDI-TOF mass spectrometry. Iturin and fengycin showed obvious antimicrobial activity to the tested fungal strains. CONCLUSIONS Bacillus velezensis HC6 produces three kinds of lipopeptides which showed antimicrobial activity against several common pathogenic fungi and bacteria. Bacillus velezensis HC6 is potential to be biocontrol bacteria in maize. SIGNIFICANCE AND IMPACT OF THE STUDY Bacillus velezensis HC6 shows obvious antimicrobial activity to important crops pathogenic fungi which usually produce mycotoxins that are harmful to animal and human health. We demonstrate that three different types of lipopeptides produced by B. velezensis contributed to the antimicrobial activity. Bacillus velezensis HC6 has the potential to be effective biocontrol agent in crops.
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Affiliation(s)
- Y Liu
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.,School of Life Science, University of Chinese Academy of Sciences, Beijing, China
| | - K Teng
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - T Wang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.,School of Life Science, University of Chinese Academy of Sciences, Beijing, China
| | - E Dong
- LongDa Foodstuff Group Co., Ltd, Laiyang, China
| | - M Zhang
- LongDa Foodstuff Group Co., Ltd, Laiyang, China
| | - Y Tao
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.,School of Life Science, University of Chinese Academy of Sciences, Beijing, China
| | - J Zhong
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.,School of Life Science, University of Chinese Academy of Sciences, Beijing, China
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Chen X, Wang Y, Gao Y, Gao T, Zhang D. Inhibitory Abilities of Bacillus Isolates and Their Culture Filtrates against the Gray Mold Caused by Botrytis cinerea on Postharvest Fruit. THE PLANT PATHOLOGY JOURNAL 2019; 35:425-436. [PMID: 31632218 PMCID: PMC6788410 DOI: 10.5423/ppj.oa.03.2019.0064] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 07/10/2019] [Accepted: 07/18/2019] [Indexed: 05/30/2023]
Abstract
Botrytis cinerea, a major phytopathogenic fungus, has been reported to infect more than 200 crop species worldwide, and it causes massive losses in yield. The aim of this study was to evaluate the inhibitory abilities and effects of Bacillus amyloliquefaciens RS-25, Bacillus licheniformis MG-4, Bacillus subtilis Z-14, and Bacillus subtilis Pnf-4 and their culture filtrates and extracts against the gray mold caused by B. cinerea on postharvest tomato, strawberry, and grapefruit. The results revealed that the cells of Z-14, culture filtrate of RS-25, and cells of Z-14 showed the strongest biocontrol activity against the gray mold on the strawberry, grape, and tomato fruit, respectively. All the strains produced volatile organic compounds (VOCs), and the VOCs of Pnf-4 displayed the highest inhibition values. Based on headspace solid-phase microextraction in combination with gas chromatography-mass spectrometry, esters accounted for the largest percentage of the VOCs produced by RS-25, MG-4, Z-14, and Pnf-4 (36.80%, 29.58%, 30.78%, and 36.26%, respectively). All the strains showed potent cellulase and protease activities, but no chitinase activity. RS-25, Z-14, and MG-4, but not Pnf-4, grew on chrome azurol S agar, and an orange halo was formed around the colonies. All the strains showed biofilm formation, fruit colonization, and lipopeptide production, which may be the main modes of action of the antagonists against B. cinerea on the fruit. This study provides the basis for developing natural biocontrol agents against the gray mold caused by B. cinerea on postharvest fruit.
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Affiliation(s)
| | | | | | | | - Dongdong Zhang
- Corresponding author.: Phone) +86-3127528273, FAX) +86-3127528273, E-mail)
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46
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Dunlap CA, Bowman MJ, Rooney AP. Iturinic Lipopeptide Diversity in the Bacillus subtilis Species Group - Important Antifungals for Plant Disease Biocontrol Applications. Front Microbiol 2019; 10:1794. [PMID: 31440222 PMCID: PMC6693446 DOI: 10.3389/fmicb.2019.01794] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 07/22/2019] [Indexed: 11/30/2022] Open
Abstract
Iturins and closely related lipopeptides constitute a family of antifungal compounds known as iturinic lipopeptides that are produced by species in the Bacillus subtilis group. The compounds that comprise the family are: iturin, bacillomycin D, bacillomycin F, bacillomycin L, mycosubtilin, and mojavensin. These lipopeptides are prominent in many Bacillus strains that have been commercialized as biological control agents against fungal plant pathogens and as plant growth promoters. The compounds are cyclic heptapeptides with a variable length alkyl sidechain, which confers surface activity properties resulting in an affinity for fungal membranes. Above a certain concentration, enough molecules enter the fungal cell membrane to create a pore in the cell wall, which leads to loss of cell contents and cell death. This study identified 330 iturinic lipopeptide clusters in publicly available genomes from the B. subtilis species group. The clusters were subsequently assigned into distinguishable types on the basis of their unique amino acid sequences and then verified by HPLC MS/MS analysis. The results show some lipopeptides are only produced by one species, whereas certain others can produce up to three. In addition, four species previously not known to produce iturinic lipopeptides were identified. The distribution of these compounds among the B. subtilis group species suggests that they play an important role in their speciation and evolution.
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Affiliation(s)
- Christopher A Dunlap
- Crop Bioprotection Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, United States Department of Agriculture, Peoria, IL, United States
| | - Michael J Bowman
- Bioenergy Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, United States Department of Agriculture, Peoria, IL, United States
| | - Alejandro P Rooney
- Crop Bioprotection Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, United States Department of Agriculture, Peoria, IL, United States
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47
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GC-MS analysis of volatile organic compounds from Bambara groundnut rhizobacteria and their antibacterial properties. World J Microbiol Biotechnol 2019; 35:83. [PMID: 31134356 PMCID: PMC6536467 DOI: 10.1007/s11274-019-2660-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Accepted: 05/15/2019] [Indexed: 11/18/2022]
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48
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Rajaofera MJN, Wang Y, Dahar GY, Jin P, Fan L, Xu L, Liu W, Miao W. Volatile organic compounds of Bacillus atrophaeus HAB-5 inhibit the growth of Colletotrichum gloeosporioides. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2019; 156:170-176. [PMID: 31027577 DOI: 10.1016/j.pestbp.2019.02.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 02/09/2019] [Accepted: 02/26/2019] [Indexed: 05/13/2023]
Abstract
The use of fungicides to control plant diseases creates a potential health risk. One alternative to this problem is the biological control, which has been succesfully applied to control plant diseases. Bacillus atrophaeus HAB-5 exhibits a high inhibitory acitivities against different fungal pathogens and suppresses them. The aim of current studies is to produce and identify the antifungal compounds produced by the strain HAB-5. We found that the submerge fermentation harvested from Luria-Bertani (LB) medium had the highest activity against Colletotrichum gloeosporioides. The petroleum ether crude extract was strongly bioactive and its activity was stable after heat treatment, pH treatment, illuminated light as well as ultra violet exposition. The antifungal compounds were purified using gel chromatography column. Based on Gas Chromatography-Mass Spectrometry (GC-MS) analysis, nineteen different volatile organic compounds (VOCs) were identified included the range of alkanes, alkenes, alcohols, and organics acid. Among these identified compounds, Chloroacetic acid, tetradecyl esters followed by Octadecane and Hexadecanoic acid, methyl ester showed antifungal activity against C. gloeosporioides. Our results clearly showed Chloroacetic acid, tetradecyl esters; Octadecane and Hexadecanoic acid, methyl ester are key inhibitory compounds produced by Bacillus atrophaeus HAB-5 against C. gloeosporioides.
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Affiliation(s)
- Mamy Jayne Nelly Rajaofera
- Institute of Tropical Agriculture and Forestry, Hainan University/Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests (Hainan University), Ministry of Education, Haikou 570228, China; Laboratory of Tropical Biomedicine and Biotechnology, Faculty of Tropical Biomedicine and Laboratory Medicine, Hainan Medical University, Haikou, Hainan 571101, China
| | - Yi Wang
- Institute of Tropical Agriculture and Forestry, Hainan University/Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests (Hainan University), Ministry of Education, Haikou 570228, China
| | - Ghulam Yaseen Dahar
- Institute of Tropical Agriculture and Forestry, Hainan University/Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests (Hainan University), Ministry of Education, Haikou 570228, China
| | - Pengfei Jin
- Institute of Tropical Agriculture and Forestry, Hainan University/Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests (Hainan University), Ministry of Education, Haikou 570228, China
| | - Lixia Fan
- Institute of Tropical Agriculture and Forestry, Hainan University/Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests (Hainan University), Ministry of Education, Haikou 570228, China
| | - Liangxiang Xu
- Institute of Tropical Agriculture and Forestry, Hainan University/Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests (Hainan University), Ministry of Education, Haikou 570228, China
| | - Wenbo Liu
- Institute of Tropical Agriculture and Forestry, Hainan University/Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests (Hainan University), Ministry of Education, Haikou 570228, China
| | - Weiguo Miao
- Institute of Tropical Agriculture and Forestry, Hainan University/Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests (Hainan University), Ministry of Education, Haikou 570228, China.
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49
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Induction of apoptosis in lung carcinoma cells by antiproliferative cyclic lipopeptides from marine algicolous isolate Bacillus atrophaeus strain AKLSR1. Process Biochem 2019. [DOI: 10.1016/j.procbio.2018.12.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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50
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Chen M, Wang J, Zhu Y, Liu B, Yang W, Ruan C. Antibacterial activity against
Ralstonia solanacearum
of the lipopeptides secreted from the
Bacillus amyloliquefaciens
strain
FJAT
‐2349. J Appl Microbiol 2019; 126:1519-1529. [DOI: 10.1111/jam.14213] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 01/23/2019] [Accepted: 01/25/2019] [Indexed: 01/19/2023]
Affiliation(s)
- M.C. Chen
- Agricultural Bioresources Research Institute, Fujian Academy of Agricultural Sciences Fuzhou China
| | - J.P. Wang
- Agricultural Bioresources Research Institute, Fujian Academy of Agricultural Sciences Fuzhou China
| | - Y.J. Zhu
- Agricultural Bioresources Research Institute, Fujian Academy of Agricultural Sciences Fuzhou China
| | - B. Liu
- Agricultural Bioresources Research Institute, Fujian Academy of Agricultural Sciences Fuzhou China
| | - W.J. Yang
- College of Biological Science and Engineering Fuzhou University Fuzhou China
| | - C.Q. Ruan
- Agricultural Bioresources Research Institute, Fujian Academy of Agricultural Sciences Fuzhou China
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