1
|
Su L, Zhang J, Fan J, Li D, Zhao M, Wang Y, Pan H, Zhao L, Zhang X. Antagonistic Mechanism Analysis of Bacillus velezensis JLU-1, a Biocontrol Agent of Rice Pathogen Magnaporthe oryzae. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024. [PMID: 39190007 DOI: 10.1021/acs.jafc.4c05353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/28/2024]
Abstract
Magnaporthe oryzae, the causal agent of rice blast, is a fungal disease pathogen. Bacillus spp. have emerged as the most promising biological control agent alternative to chemical fungicides. In this study, the bacterial strain JLU-1 with significant antagonistic activity isolated from the rhizosphere soil of rice was identified as Bacillus velezensis through whole-genome sequencing, average nucleotide identity analysis, and 16S rRNA gene sequencing. Twelve gene clusters for secondary metabolite synthesis were identified in JLU-1. Furthermore, 3 secondary metabolites were identified in JLU-1, and the antagonistic effect of secondary metabolites against fungal pathogens was confirmed. Exposure to JLU-1 reduced the virulence of M. oryzae, and JLU-1 has the ability to induce the reactive oxygen species production of rice and improve the salt tolerance of rice. All of these results indicated that JLU-1 and its secondary metabolites have the promising potential to be developed into a biocontrol agent to control fungal diseases.
Collapse
Affiliation(s)
- Longhao Su
- College of Plant Science, Jilin University, Changchun 130062, China
| | - Jiyue Zhang
- College of Plant Science, Jilin University, Changchun 130062, China
| | - Jinyu Fan
- College of Plant Science, Jilin University, Changchun 130062, China
| | - Dan Li
- College of Plant Science, Jilin University, Changchun 130062, China
| | - Meixi Zhao
- College of Plant Science, Jilin University, Changchun 130062, China
| | - Yichi Wang
- College of Plant Science, Jilin University, Changchun 130062, China
| | - Hongyu Pan
- College of Plant Science, Jilin University, Changchun 130062, China
| | - Lei Zhao
- College of Plant Science, Jilin University, Changchun 130062, China
| | - Xianghui Zhang
- College of Plant Science, Jilin University, Changchun 130062, China
| |
Collapse
|
2
|
Chen X, Zhang Y, Chao S, Song L, Wu G, Sun Y, Chen Y, Lv B. Biocontrol potential of endophytic Bacillus subtilis A9 against rot disease of Morchella esculenta. Front Microbiol 2024; 15:1388669. [PMID: 38873148 PMCID: PMC11169702 DOI: 10.3389/fmicb.2024.1388669] [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: 02/20/2024] [Accepted: 05/06/2024] [Indexed: 06/15/2024] Open
Abstract
Introduction Morchella esculenta is a popular edible fungus with high economic and nutritional value. However, the rot disease caused by Lecanicillium aphanocladii, pose a serious threat to the quality and yield of M. esculenta. Biological control is one of the effective ways to control fungal diseases. Methods and results In this study, an effective endophytic B. subtilis A9 for the control of M. esculenta rot disease was screened, and its biocontrol mechanism was studied by transcriptome analysis. In total, 122 strains of endophytic bacteria from M. esculenta, of which the antagonistic effect of Bacillus subtilis A9 on L. aphanocladii G1 reached 72.2% in vitro tests. Biological characteristics and genomic features of B. subtilis A9 were analyzed, and key antibiotic gene clusters were detected. Scanning electron microscope (SEM) observation showed that B. subtilis A9 affected the mycelium and spores of L. aphanocladii G1. In field experiments, the biological control effect of B. subtilis A9 reached to 62.5%. Furthermore, the transcritome profiling provides evidence of B. subtilis A9 bicontrol at the molecular level. A total of 1,246 differentially expressed genes (DEGs) were identified between the treatment and control group. Gene Ontology (GO) enrichment analysis showed that a large number of DEGs were related to antioxidant activity related. Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis showed that the main pathways were Nitrogen metabolism, Pentose Phosphate Pathway (PPP) and Mitogen-Activated Protein Kinases (MAPK) signal pathway. Among them, some important genes such as carbonic anhydrase CA (H6S33_007248), catalase CAT (H6S33_001409), tRNA dihydrouridine synthase DusB (H6S33_001297) and NAD(P)-binding protein NAD(P) BP (H6S33_000823) were found. Furthermore, B. subtilis A9 considerably enhanced the M. esculenta activity of Polyphenol oxidase (POD), Superoxide dismutase (SOD), Phenylal anineammonia lyase (PAL) and Catalase (CAT). Conclusion This study presents the innovative utilization of B. subtilis A9, for effectively controlling M. esculenta rot disease. This will lay a foundation for biological control in Morchella, which may lead to the improvement of new biocontrol agents for production.
Collapse
Affiliation(s)
- Xue Chen
- Biotechnology Research Institute, Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai, China
| | - Yin Zhang
- Biotechnology Research Institute, Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai, China
- Key Laboratory for Safety Assessment (Environment) of Agricultural Genetically Modified Organisms, Ministry of Agriculture and Rural Affairs, P.R, Shanghai, China
- Shanghai Professional Technology Service Platform of Agricultural Biosafety Evaluation and Testing, Shanghai Academy of Agricultural Sciences, Shanghai, China
| | - ShengQian Chao
- Biotechnology Research Institute, Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai, China
- Key Laboratory for Safety Assessment (Environment) of Agricultural Genetically Modified Organisms, Ministry of Agriculture and Rural Affairs, P.R, Shanghai, China
- Shanghai Professional Technology Service Platform of Agricultural Biosafety Evaluation and Testing, Shanghai Academy of Agricultural Sciences, Shanghai, China
| | - LiLi Song
- Biotechnology Research Institute, Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai, China
- Key Laboratory for Safety Assessment (Environment) of Agricultural Genetically Modified Organisms, Ministry of Agriculture and Rural Affairs, P.R, Shanghai, China
- Shanghai Professional Technology Service Platform of Agricultural Biosafety Evaluation and Testing, Shanghai Academy of Agricultural Sciences, Shanghai, China
| | - GuoGan Wu
- Biotechnology Research Institute, Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai, China
- Key Laboratory for Safety Assessment (Environment) of Agricultural Genetically Modified Organisms, Ministry of Agriculture and Rural Affairs, P.R, Shanghai, China
- Shanghai Professional Technology Service Platform of Agricultural Biosafety Evaluation and Testing, Shanghai Academy of Agricultural Sciences, Shanghai, China
| | - Yu Sun
- Biotechnology Research Institute, Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai, China
- Key Laboratory for Safety Assessment (Environment) of Agricultural Genetically Modified Organisms, Ministry of Agriculture and Rural Affairs, P.R, Shanghai, China
- Shanghai Professional Technology Service Platform of Agricultural Biosafety Evaluation and Testing, Shanghai Academy of Agricultural Sciences, Shanghai, China
| | - YiFan Chen
- Biotechnology Research Institute, Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai, China
- Key Laboratory for Safety Assessment (Environment) of Agricultural Genetically Modified Organisms, Ministry of Agriculture and Rural Affairs, P.R, Shanghai, China
- Shanghai Professional Technology Service Platform of Agricultural Biosafety Evaluation and Testing, Shanghai Academy of Agricultural Sciences, Shanghai, China
| | - BeiBei Lv
- Biotechnology Research Institute, Key Laboratory of Agricultural Genetics and Breeding, Shanghai Academy of Agricultural Sciences, Shanghai, China
- Key Laboratory for Safety Assessment (Environment) of Agricultural Genetically Modified Organisms, Ministry of Agriculture and Rural Affairs, P.R, Shanghai, China
- Shanghai Professional Technology Service Platform of Agricultural Biosafety Evaluation and Testing, Shanghai Academy of Agricultural Sciences, Shanghai, China
- Shanghai Co-Elite Agricultural Sci-Tech (Group) Co., Ltd., Shanghai, China
- CIMMYT-China Specialty Maize Research Center, Shanghai, China
| |
Collapse
|
3
|
Liu Z, Zhang J, Fan C, Sun S, An X, Sun Y, Gao T, Zhang D. Influence of Bacillus subtilis strain Z-14 on microbial ecology of cucumber rhizospheric vermiculite infested with fusarium oxysporum f. sp. cucumerinum. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2024; 201:105875. [PMID: 38685217 DOI: 10.1016/j.pestbp.2024.105875] [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: 02/02/2024] [Revised: 03/11/2024] [Accepted: 03/13/2024] [Indexed: 05/02/2024]
Abstract
Fusarium oxysporum (FO) is a typical soil-borne pathogenic fungus, and the cucumber wilt disease caused by F. oxysporum f. sp. cucumerinum (FOC) seriously affects crop yield and quality. Vermiculite is increasingly being used as a culture substrate; nevertheless, studies exploring the effectiveness and mechanisms of biocontrol bacteria in this substrate are limited. In this study, vermiculite was used as a culture substrate to investigate the control effect of Bacillus subtilis strain Z-14 on cucumber wilt and the rhizospheric microecology, focusing on colonization ability, soil microbial diversity, and rhizosphere metabolome. Pot experiments showed that Z-14 effectively colonized the cucumber roots, achieving a controlled efficacy of 61.32% for wilt disease. It significantly increased the abundance of Bacillus and the expression of NRPS and PKS genes, while reducing the abundance of FO in the rhizosphere. Microbial diversity sequencing showed that Z-14 reduced the richness and diversity of the rhizosphere bacterial community, increased the richness and diversity of the fungal community, and alleviated the effect of FO on the community structure of the cucumber rhizosphere. The metabolomics analysis revealed that Z-14 affected ABC transporters, amino acid synthesis, and the biosynthesis of plant secondary metabolites. Additionally, Z-14 increased the contents of phenylacetic acid, capsidol, and quinolinic acid, all of which were related to the antagonistic activity in the rhizosphere. Z-14 exhibited a significant control effect on cucumber wilt and influenced the microflora and metabolites in rhizospheric vermiculite, providing a theoretical basis for further understanding the control effect and mechanism of cucumber wilt in different culture substrates.
Collapse
Affiliation(s)
- Zhaosha Liu
- College of Life Science, Hebei Agricultural University, Baoding, China; Hebei Provincial Engineering Research Center for Resource Utilization of Agricultural Wastes, Baoding, China
| | - Jizong Zhang
- College of Agronomy, Hebei Agricultural University, Baoding, China
| | - Chenxi Fan
- College of Life Science, Hebei Agricultural University, Baoding, China; Hebei Provincial Engineering Research Center for Resource Utilization of Agricultural Wastes, Baoding, China
| | - Shangyi Sun
- College of Life Science, Hebei Agricultural University, Baoding, China; Hebei Provincial Engineering Research Center for Resource Utilization of Agricultural Wastes, Baoding, China
| | - Xutong An
- College of Life Science, Hebei Agricultural University, Baoding, China; Hebei Provincial Engineering Research Center for Resource Utilization of Agricultural Wastes, Baoding, China
| | - Yanheng Sun
- College of Life Science, Hebei Agricultural University, Baoding, China; Hebei Provincial Engineering Research Center for Resource Utilization of Agricultural Wastes, Baoding, China
| | - Tongguo Gao
- College of Life Science, Hebei Agricultural University, Baoding, China; Hebei Provincial Engineering Research Center for Resource Utilization of Agricultural Wastes, Baoding, China
| | - Dongdong Zhang
- College of Life Science, Hebei Agricultural University, Baoding, China; Hebei Provincial Engineering Research Center for Resource Utilization of Agricultural Wastes, Baoding, China.
| |
Collapse
|
4
|
Yue C, Du C, Wang X, Tan Y, Liu X, Fan H. Powdery mildew-induced changes in phyllosphere microbial community dynamics of cucumber. FEMS Microbiol Ecol 2024; 100:fiae050. [PMID: 38599637 PMCID: PMC11062426 DOI: 10.1093/femsec/fiae050] [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: 07/09/2023] [Revised: 02/22/2024] [Accepted: 04/09/2024] [Indexed: 04/12/2024] Open
Abstract
As an important habitat for microorganisms, the phyllosphere has a great impact on plant growth and health, and changes in phyllosphere microorganisms are closely related to the occurrence of leaf diseases. However, there remains a limited understanding regarding alterations to the microbial community in the phyllosphere resulting from pathogen infections. Here, we analyzed and compared the differences in phyllosphere microorganisms of powdery mildew cucumber from three disease severity levels (0% < L1 < 30%, 30% ≤ L2 < 50%, L3 ≥ 50%, the number represents the lesion coverage rate of powdery mildew on leaves). There were significant differences in α diversity and community structure of phyllosphere communities under different disease levels. Disease severity altered the community structure of phyllosphere microorganisms, Rosenbergiella, Rickettsia, and Cladosporium accounted for the largest proportion in the L1 disease grade, while Bacillus, Pantoea, Kocuria, and Podosphaera had the highest relative abundance in the L3 disease grade. The co-occurrence network analysis of the phyllosphere microbial community indicated that the phyllosphere bacterial community was most affected by the severity of disease. Our results suggested that with the development of cucumber powdery mildew, the symbiotic relationship between species was broken, and the entire bacterial community tended to compete.
Collapse
Affiliation(s)
- Cong Yue
- Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, College of Horticulture Science, Zhejiang A and F University, Hangzhou, Zhejiang 311300, China
| | - Changxia Du
- Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, College of Horticulture Science, Zhejiang A and F University, Hangzhou, Zhejiang 311300, China
| | - Xiaodan Wang
- Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, College of Horticulture Science, Zhejiang A and F University, Hangzhou, Zhejiang 311300, China
| | - Yinqing Tan
- Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, College of Horticulture Science, Zhejiang A and F University, Hangzhou, Zhejiang 311300, China
| | - Xingchen Liu
- Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, College of Horticulture Science, Zhejiang A and F University, Hangzhou, Zhejiang 311300, China
| | - Huaifu Fan
- Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, College of Horticulture Science, Zhejiang A and F University, Hangzhou, Zhejiang 311300, China
| |
Collapse
|
5
|
Gao C, Wang Z, Wang C, Yang J, Du R, Bing H, Xiang W, Wang X, Liu C. Endophytic Streptomyces sp. NEAU-DD186 from Moss with Broad-Spectrum Antimicrobial Activity: Biocontrol Potential Against Soilborne Diseases and Bioactive Components. PHYTOPATHOLOGY 2024; 114:340-347. [PMID: 38349678 DOI: 10.1094/phyto-06-23-0204-r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Soilborne diseases cause significant economic losses in agricultural production around the world. They are difficult to control because a host plant is invaded by multiple pathogens, and chemical control often does not work well. In this study, we isolated and identified an endophytic Streptomyces sp. NEAU-DD186 from moss, which showed broad-spectrum antifungal activity against 17 soilborne phytopathogenic fungi, with Bipolaris sorokiniana being the most prominent. The strain also exhibited strong antibacterial activity against soilborne phytopathogenic bacteria Ralstonia solanacearum. To evaluate its biocontrol potential, the strain was prepared into biofertilizer by solid-state fermentation. Response surface methodology was employed to optimize the fermentation conditions for maximizing spore production and revealed that the 1:1 ratio of vermicompost to wheat bran, a temperature of 28°C, and 50% water content with an inoculation amount of 15% represented the optimal parameters. Pot experiments showed that the application of biofertilizer with a spore concentration of 108 CFU/g soil could effectively suppress the occurrence of tomato bacterial wilt caused by R. solanacearum and wheat root rot caused by B. sorokiniana, and the biocontrol efficacy was 81.2 and 72.2%, respectively. Chemical analysis of strain NEAU-DD186 extracts using nuclear magnetic resonance spectrometry and mass analysis indicated that 25-O-malonylguanidylfungin A and 23-O-malonylguanidylfungin A were the main active constituents, which showed high activity against R. solanacearum (EC50 of 2.46 and 2.58 µg ml-1) and B. sorokiniana (EC50 of 3.92 and 3.95 µg ml-1). In conclusion, this study demonstrates that Streptomyces sp. NEAU-DD186 can be developed as biofertilizer to control soilborne diseases.
Collapse
Affiliation(s)
- Congting Gao
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Harbin 150030, China
- Hebei Technology Innovation Center for Green Management of Soil-borne Diseases, Baoding University, Baoding 071000, China
| | - Zhiyan Wang
- Department of Molecular Pharmacology, Tianjin Medical University Cancer Institute & Hospital, Tianjin 300072, China
| | - Chengqin Wang
- Gaomi City Inspection and Testing Center, Gaomi 261500, China
| | - Jingquan Yang
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Harbin 150030, China
| | - Rui Du
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Harbin 150030, China
| | - Hui Bing
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Harbin 150030, China
| | - Wensheng Xiang
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Harbin 150030, China
| | - Xiangjing Wang
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Harbin 150030, China
| | - Chongxi Liu
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Harbin 150030, China
- Hebei Technology Innovation Center for Green Management of Soil-borne Diseases, Baoding University, Baoding 071000, China
| |
Collapse
|
6
|
Wang S, Zheng L, Gao A, Xiao Y, Han Z, Pan H, Zhang H. Antifungal activity of Klebsiella grimontii DR11 against Fusarium oxysporum causing soybean root rot. J Appl Microbiol 2023; 134:lxad245. [PMID: 37884449 DOI: 10.1093/jambio/lxad245] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 10/01/2023] [Accepted: 10/25/2023] [Indexed: 10/28/2023]
Abstract
AIMS Soybean root rot, caused by Fusarium oxysporum, leads to significant economic and financial losses to the soybean processing industry globally. In the study, we aimed to explore a biocontrol agent to combat F. oxysporum infection in soybean. METHODS AND RESULTS From soybean rhizosphere soil, 48 strains were isolated. Among them, the strain DR11 exhibited the highest inhibition rate of 72.27%. Morphological, physiological, biochemical, and 16S rDNA identification revealed that the strain DR11 was Klebsiella grimontii DR11. Strain DR11 could inhibit the growth of F. oxysporum and spore formation and alter the mycelial morphology. At 5.0 × 106 CFU mL-1, pH 7, and 30°C, it exhibited the highest inhibitory rate (72.27%). Moreover, it could decrease the activity of cell-wall-degrading enzymes of F. oxysporum. Simultaneously, the activities of defense-related enzymes and content of malondialdehyde in soybean plants were increased after treatment with strain DR11. In addition, strain DR11 could form aggregates to form biofilm and adsorb on the surface of soybean roots. It inhibited F. oxysporum growth on soybean seedlings, with an inhibitory effect of 62.71%. CONCLUSION Klebsiella grimontii DR11 had a strong inhibitory effect on F. oxysporum and could be used as a biocontrol agent to combat F. oxysporum infection in soybean.
Collapse
Affiliation(s)
- Shengyi Wang
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, P. R. China
| | - Lining Zheng
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, P. R. China
| | - Ao Gao
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, P. R. China
| | - Yufeng Xiao
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, P. R. China
| | - Zhe Han
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, P. R. China
| | - Hongyu Pan
- College of Plant Sciences, Jilin University, Changchun 130062, P. R. China
| | - Hao Zhang
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, P. R. China
| |
Collapse
|
7
|
Wang Z, Gao C, Yang J, Du R, Zeng F, Bing H, Xia B, Shen Y, Liu C. Endophytic Streptomyces sp. NEAU-ZSY13 from the leaf of Perilla frutescens, as a promising broad-spectrum biocontrol agent against soil-borne diseases. Front Microbiol 2023; 14:1243610. [PMID: 37692391 PMCID: PMC10483227 DOI: 10.3389/fmicb.2023.1243610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 08/15/2023] [Indexed: 09/12/2023] Open
Abstract
Soil-borne diseases cause significant economic losses in global agricultural production. These diseases are challenging to control due to the invasion of multiple pathogens into host plants, and traditional chemical control methods often yield unsatisfactory results. In this study, we isolated and identified an endophytic Streptomyces, designated as NEAU-ZSY13, from the leaf of Perilla frutescens. This isolate exhibited broad-spectrum antifungal activity against 17 soil-borne phytopathogenic fungi, with Bipolaris sorokiniana being the most prominent. Additionally, it displayed strong antibacterial activity against the soil-borne phytopathogenic bacterium Ralstonia solanacearum. To assess its biocontrol potential, the isolate was utilized to produce a biofertilizer through solid-state fermentation. The fermentation conditions were optimized using response surface methodology to maximize the spore production. The results revealed that more abundant spores were produced with a 1:2 ratio of vermicompost to wheat bran, 60% water content, 20% inoculation amount and 28°C. Subsequent pot experiments demonstrated that the application of the biofertilizer with a spore concentration of 108 CFU/g soil effectively suppressed the occurrence of tomato bacterial wilt caused by R. solanacearum and wheat root rot caused by B. sorokiniana, with biocontrol efficacies of 72.2 and 78.3%, respectively. Chemical analysis of NEAU-ZSY13 extracts, using nuclear magnetic resonance spectrometry and mass analysis, identified niphimycin C and niphimycin A as the primary active constituents. These compounds exhibited high activity against R. solanacearum (EC50 of 3.6 and 2.4 μg mL-1) and B. sorokiniana (EC50 of 3.9 and 3.4 μg mL-1). In conclusion, this study demonstrates the potential of Streptomyces sp. NEAU-ZSY13 as a biofertilizer for the control of soil-borne diseases.
Collapse
Affiliation(s)
- Zhiyan Wang
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Harbin, China
- Department of Molecular Pharmacology, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China
| | - Congting Gao
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Harbin, China
- Hebei Technology Innovation Center for Green Management of Soil-borne Diseases, Baoding University, Baoding, China
| | - Jingquan Yang
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Harbin, China
| | - Rui Du
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Harbin, China
| | - Fanli Zeng
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Harbin, China
| | - Hui Bing
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Harbin, China
| | - Banghua Xia
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Harbin, China
| | - Yue Shen
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Harbin, China
| | - Chongxi Liu
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Harbin, China
- Hebei Technology Innovation Center for Green Management of Soil-borne Diseases, Baoding University, Baoding, China
| |
Collapse
|
8
|
Liu Z, Fan C, Xiao J, Sun S, Gao T, Zhu B, Zhang D. Metabolomic and Transcriptome Analysis of the Inhibitory Effects of Bacillus subtilis Strain Z-14 against Fusarium oxysporum Causing Vascular Wilt Diseases in Cucumber. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:2644-2657. [PMID: 36706360 DOI: 10.1021/acs.jafc.2c07539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Controlling cucumber Fusarium wilt caused by Fusarium oxysporum f. sp. cucumerinum (FOC) with Bacillus strains is a hot research topic. However, the molecular mechanism of Bacillus underlying the biocontrol of cucumber wilt is rarely reported. In this study, B. subtilis strain Z-14 showed significant antagonistic activity against FOC, and the control effect reached 88.46% via pot experiment. Microscopic observations showed that strain Z-14 induced the expansion and breakage of FOC hyphae. The cell wall thickness was uneven, and the organelle structure was degraded. The combined analysis of metabolome and transcriptome showed that strain Z-14 inhibited the FOC infection by inhibiting the synthesis of cell wall and cell membrane, energy metabolism, and amino acid synthesis of FOC mycelium, inhibiting the clearance of reactive oxygen species (ROS) and the secretion of cell wall-degrading enzymes (CWDEs), thereby affecting mitogen-activated protein kinase (MAPK) signal transduction and inhibiting the transport function.
Collapse
Affiliation(s)
- Zhaosha Liu
- College of Life Science, Hebei Agricultural University, Baoding 071000, China
- Hebei Provincial Engineering Research Center for Resource Utilization of Agricultural Wastes, Baoding 071000, Hebei, China
| | - Chenxi Fan
- College of Life Science, Hebei Agricultural University, Baoding 071000, China
- Hebei Provincial Engineering Research Center for Resource Utilization of Agricultural Wastes, Baoding 071000, Hebei, China
| | - Jiawen Xiao
- College of Life Science, Hebei Agricultural University, Baoding 071000, China
- Hebei Provincial Engineering Research Center for Resource Utilization of Agricultural Wastes, Baoding 071000, Hebei, China
| | - Shangyi Sun
- College of Life Science, Hebei Agricultural University, Baoding 071000, China
- Hebei Provincial Engineering Research Center for Resource Utilization of Agricultural Wastes, Baoding 071000, Hebei, China
| | - Tongguo Gao
- College of Life Science, Hebei Agricultural University, Baoding 071000, China
- Hebei Provincial Engineering Research Center for Resource Utilization of Agricultural Wastes, Baoding 071000, Hebei, China
| | - Baocheng Zhu
- College of Life Science, Hebei Agricultural University, Baoding 071000, China
- Hebei Provincial Engineering Research Center for Resource Utilization of Agricultural Wastes, Baoding 071000, Hebei, China
| | - Dongdong Zhang
- College of Life Science, Hebei Agricultural University, Baoding 071000, China
- Hebei Provincial Engineering Research Center for Resource Utilization of Agricultural Wastes, Baoding 071000, Hebei, China
| |
Collapse
|
9
|
Zhao G, Pei Y, Yang R, Xiang L, Fang Z, Wang Y, Yin D, Wu J, Gao D, Yu D, Li X. A non-destructive testing method for early detection of ginseng root diseases using machine learning technologies based on leaf hyperspectral reflectance. FRONTIERS IN PLANT SCIENCE 2022; 13:1031030. [PMID: 36466253 PMCID: PMC9714554 DOI: 10.3389/fpls.2022.1031030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 11/02/2022] [Indexed: 06/17/2023]
Abstract
Ginseng is an important medicinal plant benefiting human health for thousands of years. Root disease is the main cause of ginseng yield loss. It is difficult to detect ginseng root disease by manual observation on the changes of leaves, as it takes a long time until symptoms appear on leaves after the infection on roots. In order to detect root diseases at early stages and limit their further spread, an efficient and non-destructive testing (NDT) method is urgently needed. Hyperspectral remote sensing technology was performed in this study to discern whether ginseng roots were diseased. Hyperspectral reflectance of leaves at 325-1,075 nm were collected from the ginsengs with no symptoms on leaves at visual. These spectra were divided into healthy and diseased groups according to the symptoms on roots after harvest. The hyperspectral data were used to construct machine learning classification models including random forest, extreme random tree (ET), adaptive boosting and gradient boosting decision tree respectively to identify diseased ginsengs, while calculating the vegetation indices and analyzing the region of specific spectral bands. The precision rates of the ET model preprocessed by savitzky golay method for the identification of healthy and diseased ginsengs reached 99% and 98%, respectively. Combined with the preliminary analysis of band importance, vegetation indices and physiological characteristics, 690-726 nm was screened out as a specific band for early detection of ginseng root diseases. Therefore, underground root diseases can be effectively detected at an early stage by leaf hyperspectral reflectance. The NDT method for early detection of ginsengs root diseases is proposed in this study. The method is helpful in the prevention and control of root diseases of ginsengs to prevent the reduction of ginseng yield.
Collapse
Affiliation(s)
- Guiping Zhao
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
- College of Traditional Chinese Medicine, Yunnan University of Chinese Medicine, Kunming, China
| | - Yifei Pei
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Ruoqi Yang
- School of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Li Xiang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Zihan Fang
- TCM Department, China National Center for Biotechnology Development, Beijing, China
| | - Ye Wang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Dou Yin
- School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui, China
| | - Jie Wu
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
- College of Traditional Chinese Medicine, Yunnan University of Chinese Medicine, Kunming, China
| | - Dan Gao
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Dade Yu
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Xiwen Li
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| |
Collapse
|
10
|
Zhang Y, Zhao M, Chen W, Yu H, Jia W, Pan H, Zhang X. Multi-Omics Techniques for Analysis Antifungal Mechanisms of Lipopeptides Produced by Bacillus velezensis GS-1 against Magnaporthe oryzae In Vitro. Int J Mol Sci 2022; 23:ijms23073762. [PMID: 35409115 PMCID: PMC8998706 DOI: 10.3390/ijms23073762] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 03/27/2022] [Accepted: 03/28/2022] [Indexed: 12/13/2022] Open
Abstract
Magnaporthe oryzae is a fungal pathogen that causes rice blast, a highly destructive disease. In the present study, the bacteria strain GS-1 was isolated from the rhizosphere soil of ginseng and identified as Bacillus velezensis through 16S rRNA gene sequencing, whole genome assembly, and average nucleotide identity analysis. B. velezensis strain GS-1 exhibited significant antagonistic activity to several plant fungal pathogens. Through whole genome sequencing, 92 Carbohydrate-Active Enzymes and 13 gene clusters that encoded for secondary metabolites were identified. In addition, strain GS-1 was able to produce the lipopeptide compounds, surfactin, fengycin, and plantazolicin. The inhibitory effects of lipopeptide compounds on M. oryzae were confirmed, and the antagonistic mechanism was explored using transcriptomics and metabolomics analysis. Differential expressed genes (DEGs) and differential accumulated metabolites (DAMs) revealed that the inhibition of M. oryzae by lipopeptide produced by GS-1 downregulated the expression of genes involved in amino acid metabolism, sugar metabolism, oxidative phosphorylation, and autophagy. These results may explain why GS-1 has antagonistic activity to fungal pathogens and revealed the mechanisms underlying the inhibitory effects of lipopeptides produced by GS-1 on fungal growth, which may provide a theoretical basis for the potential application of B. velezensis GS-1 in future plant protection.
Collapse
|