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Chen X, Liu J, Chen AJ, Wang L, Jiang X, Gong A, Liu W, Wu H. Burkholderia ambifaria H8 as an effective biocontrol strain against maize stalk rot via producing volatile dimethyl disulfide. PEST MANAGEMENT SCIENCE 2024; 80:4125-4136. [PMID: 38578571 DOI: 10.1002/ps.8119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 03/08/2024] [Accepted: 04/02/2024] [Indexed: 04/06/2024]
Abstract
BACKGROUND Maize stalk rot (MSR) caused by Fusarium graminearum is the primary factor contributing to the reduction in maize yield and quality. However, this soil-borne disease presents a significant challenge for sustainable control through field management and chemical agents. The screening of novel biocontrol agents can aid in developing innovative and successful strategies for MSR control. RESULTS A total of 407 strains of bacteria were isolated from the rhizosphere soil of a resistant maize inbred line. One strain exhibited significant antagonistic activity in plate and pot experiments, and was identified as Burkholderia ambifaria H8. The strain could significantly inhibit the mycelial growth and spore germination of F. graminearum, induce resistance to stalk rot, and promote plant growth. The volatile compounds produced by strain H8 and its secondary metabolites in the sterile fermentation broth exhibited antagonistic activity. The primary volatile compound produced by strain H8 was identified as dimethyl disulfide (DMDS) using gas chromatography tandem mass spectrometry. Through in vitro antagonistic activity assays and microscopic observation, it was confirmed that DMDS was capable of inhibiting mycelial growth and disrupting the mycelial structure of F. graminearum, suggesting it may be the major active compound for strain H8. The transcriptome data of F. graminearum further indicated that strain H8 and its volatile compounds could alter pathogenic fungi metabolism, influence the related metabolic pathways, and potentially induce cell apoptosis within F. graminearum. CONCLUSION Our results showed that B. ambifaria H8 was capable of producing the volatile substance dimethyl disulfide, which influenced the synthesis and permeability of cell membranes in pathogens. Thus, B. ambifaria H8 was found to be a promising biological control agent against MSR. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Xinyu Chen
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Key Laboratory of Integrated Pest Management in Crops, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection, Chinese Academy of Agricultural Science, Beijing, China
| | - Jingrong Liu
- College of Life Science, Xinyang Normal University, Xinyang, China
| | - Amanda Juan Chen
- Microbiome Research Center, Moon (Beijing) Biotech Ltd., Beijing, P.R. China
| | - Lin Wang
- Microbiome Research Center, Moon (Beijing) Biotech Ltd., Beijing, P.R. China
| | - Xianzhi Jiang
- Microbiome Research Center, Moon (Beijing) Biotech Ltd., Beijing, P.R. China
| | - Andong Gong
- College of Life Science, Xinyang Normal University, Xinyang, China
| | - Wende Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Key Laboratory of Integrated Pest Management in Crops, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection, Chinese Academy of Agricultural Science, Beijing, China
| | - Hanxiang Wu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Key Laboratory of Integrated Pest Management in Crops, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection, Chinese Academy of Agricultural Science, Beijing, China
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Wang D, Lin H, Shan Y, Song J, Zhang DD, Dai XF, Han D, Chen JY. The potential of Burkholderia gladioli KRS027 in plant growth promotion and biocontrol against Verticillium dahliae revealed by dual transcriptome of pathogen and host. Microbiol Res 2024; 287:127836. [PMID: 39018831 DOI: 10.1016/j.micres.2024.127836] [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: 03/28/2024] [Revised: 07/11/2024] [Accepted: 07/13/2024] [Indexed: 07/19/2024]
Abstract
Verticillium dahliae is a destructive, soil-borne pathogen that causes significant losses on numerous important dicots. Recently, beneficial microbes inhabiting the rhizosphere have been exploited and used to control plant diseases. In the present study, Burkholderia gladioli KRS027 demonstrated excellent inhibitory effects against Verticillium wilt in cotton seedlings. Plant growth and development was promoted by affecting the biosynthesis and signaling pathways of brassinosteroids (BRs), gibberellins (GAs), and auxins, consequently promoting stem elongation, shoot apical meristem, and root apical tissue division in cotton. Furthermore, based on the host transcriptional response to V. dahliae infection, it was found that KRS027 modulates the plants to maintain cell homeostasis and respond to other pathogen stress. Moreover, KRS027 induced disruption of V. dahliae cellular structures, as evidenced by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses. Based on the comparative transcriptomic analysis between KRS027 treated and control group of V. dahliae, KRS027 induced substantial alterations in the transcriptome, particularly affecting genes encoding secreted proteins, small cysteine-rich proteins (SCRPs), and protein kinases. In addition, KRS027 suppressed the growth of different clonal lineages of V. dahliae strains through metabolites, and volatile organic compounds (VOCs) released by KRS027 inhibited melanin biosynthesis and microsclerotia development. These findings provide valuable insights into an alternative biocontrol strategy for Verticillium wilt, demonstrating that the antagonistic bacterium KRS027 holds promise as a biocontrol agent for promoting plant growth and managing disease occurrence.
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Affiliation(s)
- Dan Wang
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou 311300, China
| | - Haiping Lin
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou 311300, China
| | - Yujia Shan
- The State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Jian Song
- The State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Dan-Dan Zhang
- The State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; Western Agricultural Research Center, Chinese Academy of Agricultural Sciences, Changji 831100, China
| | - Xiao-Feng Dai
- The State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; Western Agricultural Research Center, Chinese Academy of Agricultural Sciences, Changji 831100, China
| | - Dongfei Han
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China; State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China, Beijing 100081, China.
| | - Jie-Yin Chen
- The State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; Western Agricultural Research Center, Chinese Academy of Agricultural Sciences, Changji 831100, China.
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Shi B, Yuan H, Wang Z, Fan Y, Qin G, Xiaoqian L, Wang L, Tu H, Hou H. Biocontrol activity and potential mechanism of volatile organic compounds from Aspergillus niger strain La2 against pear Valsa canker. PEST MANAGEMENT SCIENCE 2024; 80:3010-3021. [PMID: 38318950 DOI: 10.1002/ps.8009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 01/05/2024] [Accepted: 02/02/2024] [Indexed: 02/07/2024]
Abstract
BACKGROUND Valsa canker caused by Valsa pyri is one of the most destructive diseases of pear, leading to severe yield and economic losses. Volatile organic compounds (VOCs) from endophytes have important roles in the regulation of plant disease. In this study, we investigated the biocontrol activity of the endophytic fungus Aspergillus niger strain La2 and its antagonistic VOCs against pear Valsa canker. RESULTS Strain La2 exhibited an obvious inhibitory effect against V. pyri. A colonization assay suggested that strain La2 could complete its life cycle on pear twigs. The symptoms of pear Valsa canker were weakened on detached pear twigs after treatment with strain La2. In addition, VOCs from strain La2 also significantly suppressed mycelial growth in V. pyri. Based on the results of headspace solid-phase microextraction/gas chromatography-mass spectrometry analysis, six possible VOCs produced by strain La2 were detected, of which 2,4-di-tert-butylphenol and 4-methyl-1-pentanol were the main antagonistic VOCs in terms of their effect on pear Valsa canker in vitro and in vivo. Further results showed that 4-methyl-1-pentanol could destroy the V. pyri hyphal structure and cell membrane integrity. Importantly, the activities of pear defense-related enzymes (polyphenol oxidase, phenylalanine ammonia lyase and superoxide dismutase) were enhanced after 4-methyl-1-pentanol treatment in pear twigs, suggesting that 4-methyl-1-pentanol might induce a plant disease resistance response. CONCLUSION Aspergillus niger strain La2 and its VOCs 2,4-di-tert-butylphenol and 4-methyl-1-pentanol have potential as novel biocontrol agents of pear Valsa canker. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Bingke Shi
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, China
| | - Hongbo Yuan
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, China
- Western Agricultural Research Center, Chinese Academy of Agricultural Sciences, Changji, China
| | - Zhuoni Wang
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, China
| | - Yangyang Fan
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, China
| | - Genhong Qin
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, China
| | - Li Xiaoqian
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, China
| | - Li Wang
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, China
| | - Hongtao Tu
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, China
- Zhongyuan Research Center, Chinese Academy of Agricultural Sciences, Xinxiang, China
| | - Hui Hou
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, China
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Yan S, Li J, Zhang Q, Jia S, Zhang Q, Wang R, Ju M, Gu P. Transcriptional Response of Wolfberry to Infestation with the Endophytic Fusarium nematophilum Strain NQ8GII4. PLANT DISEASE 2024; 108:1514-1525. [PMID: 38050402 DOI: 10.1094/pdis-07-23-1397-re] [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: 12/06/2023]
Abstract
Fusarium nematophilum NQ8GII4 is an endophytic fungus isolated from the root of healthy wolfberry (Lycium barbarum). Previous studies have reported that NQ8GII4 could dwell in wolfberry roots and enhance the defense responses in wolfberry against root rot, which is caused by F. oxysporum. To further elucidate the molecular mechanism of wolfberry disease resistance induced by NQ8GII4, in the present study, we adopted RNA sequencing analysis to profile the transcriptome of wolfberry response to NQ8GII4 infestation over a time course of 3 and 7 days postinoculation. Gene ontology enrichment analysis revealed that differentially expressed genes (DEGs) were enriched in biological regulation, response to stimulus, signaling, detoxification, immune system process, transporter activity, electron carrier activity, transcription factor activity, nucleic acid binding transcription factor, and antioxidant activity. Through Kyoto Encyclopedia of Genes and Genomes analysis, it was found that many of these DEGs were enriched in pathways related to plant-pathogen interactions, hormone signal transduction, and the phenylpropanoid biosynthesis pathway in wolfberry. This result suggested that innate immunity, phytohormone signaling, and numerous phenylpropanoid compounds comprise a complex defense network in wolfberry. Chloroplast 50S ribosomal proteins were consistently located at the core position of the response in wolfberry following infestation with NQ8GII4 analyzed by the protein-protein interaction network. This study elucidated the molecular mechanism underlying the interaction between NQ8GII4 and wolfberry, clarified the wolfberry immune response network to endophytic fungi infestation, identified candidate resistance genes in wolfberry, and provided a fundamental date for subsequent work.
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Affiliation(s)
- Siyuan Yan
- College of Forestry and Prataculture, Ningxia University, Yinchuan 750021, China
| | - Jin Li
- School of Agriculture, Ningxia University, Yinchuan 750021, China
| | - Qingchen Zhang
- Department of Pharmacotherapy and Translational Research, University of Florida, Gainesville, FL 32611, U.S.A
| | - Shuxin Jia
- School of Agriculture, Ningxia University, Yinchuan 750021, China
| | - Qiangqiang Zhang
- College of Forestry and Prataculture, Ningxia University, Yinchuan 750021, China
| | - Ruotong Wang
- School of Agriculture, Ningxia University, Yinchuan 750021, China
| | - Mingxiu Ju
- College of Forestry and Prataculture, Ningxia University, Yinchuan 750021, China
| | - Peiwen Gu
- College of Forestry and Prataculture, Ningxia University, Yinchuan 750021, China
- School of Agriculture, Ningxia University, Yinchuan 750021, China
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Zheng R, Wang D, Li X, Yang M, Kong Q, Ren X. Screening of core microorganisms in healthy and diseased peaches and effect evaluation of biocontrol bacteria (Burkholderia sp.). Food Microbiol 2024; 120:104465. [PMID: 38431317 DOI: 10.1016/j.fm.2024.104465] [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: 12/05/2023] [Revised: 12/28/2023] [Accepted: 01/08/2024] [Indexed: 03/05/2024]
Abstract
Biological antagonists serve as the most important green alternatives to chemical fungicides, a class of microorganism that inhibits the growth of pathogenic fungi to reduce fruit incidence. In this paper, healthy and diseased peach fruit was selected for amplicon sequencing of the epiphytic microbiota on their surface to obtain a comprehensive understanding. Community structure, diversity and LefSe analysis were performed to screen Acetobacter, Muribaculaceae and Burkholderia as the core bacteria, Mycosphaerella, Penicillium and Alternaria as the core fungi, they showed significant differences and were highly enriched. Two strains fungi (Penicillium K3 and N1) and one strain antagonistic bacteria (Burkholderia J2) were isolated. The in intro test results indicated the bacterial suspension, fermentation broth and volatile organic compounds of antagonistic bacteria J2 were able to significantly inhibit pathogen growth. In vivo experiments, peach was stored at 28 °C for 6 days after different treatments, and samples were taken every day. It was found that Burkholderia J2 enhanced peach resistance by increasing the activities of antioxidant-related enzymes such as SOD, POD, PAL, PPO, GR, MDHAR, and DHAR. The results improved that Burkholderia J2 has great biocontrol potential and could be used as a candidate strain for green control of blue mold.
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Affiliation(s)
- Renyu Zheng
- Xi'an Key Laboratory of Characteristic Fruit Storage and Preservation, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China; Shaanxi Engineering Laboratory of Food Green Processing and Safety Control, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China
| | - Di Wang
- Xi'an Key Laboratory of Characteristic Fruit Storage and Preservation, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China; Shaanxi Engineering Laboratory of Food Green Processing and Safety Control, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China
| | - Xue Li
- Xi'an Key Laboratory of Characteristic Fruit Storage and Preservation, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China; Shaanxi Engineering Laboratory of Food Green Processing and Safety Control, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China
| | - Miao Yang
- Xi'an Key Laboratory of Characteristic Fruit Storage and Preservation, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China; Shaanxi Engineering Laboratory of Food Green Processing and Safety Control, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China
| | - Qingjun Kong
- Xi'an Key Laboratory of Characteristic Fruit Storage and Preservation, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China; Shaanxi Engineering Laboratory of Food Green Processing and Safety Control, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China.
| | - Xueyan Ren
- Xi'an Key Laboratory of Characteristic Fruit Storage and Preservation, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China; Shaanxi Engineering Laboratory of Food Green Processing and Safety Control, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China.
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Srikamwang C, onsa NE, Sunanta P, Sangta J, Chanway CP, Thanakkasaranee S, Sommano SR. Role of Microbial Volatile Organic Compounds in Promoting Plant Growth and Disease Resistance in Horticultural Production. PLANT SIGNALING & BEHAVIOR 2023; 18:2227440. [PMID: 37366146 PMCID: PMC10730190 DOI: 10.1080/15592324.2023.2227440] [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: 05/03/2023] [Revised: 06/12/2023] [Accepted: 06/15/2023] [Indexed: 06/28/2023]
Abstract
Microbial volatile organic compounds (MVOCs) are a diverse group of volatile organic compounds that microorganisms may produce and release into the environment. These compounds have both positive and negative effects on plants, as they have been shown to be effective at mitigating stresses and functioning as immune stimulants. Furthermore, MVOCs modulate plant growth and systemic plant resistance, while also serving as attractants or repellents for insects and other stressors that pose threats to plants. Considering the economic value of strawberries as one of the most popular and consumed fruits worldwide, harnessing the benefits of MVOCs becomes particularly significant. MVOCs offer cost-effective and efficient solutions for disease control and pest management in horticultural production, as they can be utilized at low concentrations. This paper provides a comprehensive review of the current knowledge on microorganisms that contribute to the production of beneficial volatile organic compounds for enhancing disease resistance in fruit products, with a specific emphasis on broad horticultural production. The review also identifies research gaps and highlights the functions of MVOCs in horticulture, along with the different types of MVOCs that impact plant disease resistance in strawberry production. By offering a novel perspective on the application and utilization of volatile organic compounds in sustainable horticulture, this review presents an innovative approach to maximizing the efficiency of horticultural production through the use of natural products.
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Affiliation(s)
- Chonlada Srikamwang
- Plant Bioactive Compound Laboratory, Faculty of Agriculture, Chiang Mai University, Chiang Mai, Thailand
- Interdisciplinary Program in Biotechnology, Graduate School, Chiang Mai University, Chiang Mai, Thailand
| | - Nuttacha Eva onsa
- Plant Bioactive Compound Laboratory, Faculty of Agriculture, Chiang Mai University, Chiang Mai, Thailand
- Department of Plant and Soil Science, Chiang Mai University, Chiang Mai, Thailand
| | - Piyachat Sunanta
- Department of Plant and Soil Science, Chiang Mai University, Chiang Mai, Thailand
- Postharvest Technology Research Center, Faculty of Agriculture, Chiang Mai University, Chiang Mai, Thailand
| | - Jiraporn Sangta
- Plant Bioactive Compound Laboratory, Faculty of Agriculture, Chiang Mai University, Chiang Mai, Thailand
- Interdisciplinary Program in Biotechnology, Graduate School, Chiang Mai University, Chiang Mai, Thailand
| | - Christopher P. Chanway
- Department of Forest and Conservation Sciences, Faculty of Forestry, University of British Columbia, Vancouver, Canada
| | - Sarinthip Thanakkasaranee
- Division of Packaging Technology, School of Agro-Industry, Faculty of Agro Industry, Chiang Mai University, Chiang Mai, Thailand
- Center of Excellence in Materials Science and Technology, Chiang Mai University, Chiang Mai, Thailand
- Center of Excellence in Agro Bio-Circular-Green Industry (Agro BCG), Chiang Mai University, Chiang Mai, Thailand
| | - Sarana Rose Sommano
- Plant Bioactive Compound Laboratory, Faculty of Agriculture, Chiang Mai University, Chiang Mai, Thailand
- Department of Plant and Soil Science, Chiang Mai University, Chiang Mai, Thailand
- Center of Excellence in Agro Bio-Circular-Green Industry (Agro BCG), Chiang Mai University, Chiang Mai, Thailand
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Hameed A, Nguyen DH, Lin SY, Stothard P, Neelakandan P, Young LS, Young CC. Hormesis of glyphosate on ferulic acid metabolism and antifungal volatile production in rice root biocontrol endophyte Burkholderia cepacia LS-044. CHEMOSPHERE 2023; 345:140511. [PMID: 37871874 DOI: 10.1016/j.chemosphere.2023.140511] [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: 06/22/2023] [Revised: 10/04/2023] [Accepted: 10/20/2023] [Indexed: 10/25/2023]
Abstract
Glyphosate (GP, N-phosphonomethyl glycine) is one of the most popular organophosphate herbicides widely used in agricultural practices worldwide. There have been extensive reports on the biohazard attributes and hormetic impacts of GP on plant and animal systems. However, the effects of GP on plant growth-promoting microbes and its ecological relevance remain unknown. Here, we show that GP does exert a hormetic impact on Burkholderia cepacia LS-044, a rice (Oryza sativa ssp. japonica cv. Tainung 71) root endophytic isolate. We used increasing doses of ferulic acid (FA, 1-25 mM) and GP (0.5-5 mM) to test the growth and antifungal volatile production in LS-044 by electrochemical, liquid chromatographic, gas chromatographic and spectrophotometric means. GP treatment at a low dose (0.5 mM) increased FA utilization and significantly (P < 0.0001) enhanced antifungal volatile activity in LS-044. Although FA (1 mM) was rapidly utilized by LS-044, no chromatographically detectable utilization of GP was observed at tested doses (0.5-5 mM). LS-044 emitted predominant amounts of tropone in addition to moderate-to-minor amounts of diverse ketones and/or their derivatives (acetone, acetophenone, 2-butanone, 1-propanone, 1-(2-furanyl-ethanone, 1-phenyl-1-propanone and 1-(3-pyridinyl)-1-propanone), d-menthol, 2-methoxy-3-(1-methylethyl)-pyrazine, dimethyl disulfide, pyridine and ammonium carbamate when grown under GP supplement. GP hormesis on LS-044 induced phenotypic variations in O. sativa ssp. japonica cv. Tainan 11 as evident through seed germination assay. Genes involved in the transformation of FA, and a key gene encoding 5-enolpyruvylshikimate 3-phosphate synthase (EPSPS) with Gly-94 and Tyr-95 residues localized at active site most likely rendering EPSPS sensitivity to GP, were detected in LS-044. This is the first report on the GP hormesis influencing morphological and metabolic aspects including volatile emission in a biocontrol bacterium that could modulate rice plant phenotype.
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Affiliation(s)
- Asif Hameed
- Division of Microbiology and Biotechnology, Yenepoya Research Centre, Yenepoya (Deemed to be University), Deralakatte, Mangalore, 575018, India; Department of Soil & Environmental Sciences, College of Agriculture and Natural Resources, National Chung Hsing University, Taichung, 402, Taiwan.
| | - Duc Hai Nguyen
- Department of Soil & Environmental Sciences, College of Agriculture and Natural Resources, National Chung Hsing University, Taichung, 402, Taiwan
| | - Shih-Yao Lin
- Department of Soil & Environmental Sciences, College of Agriculture and Natural Resources, National Chung Hsing University, Taichung, 402, Taiwan
| | - Paul Stothard
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta, T6G 2P5, Canada
| | - Poovarasan Neelakandan
- Department of Soil & Environmental Sciences, College of Agriculture and Natural Resources, National Chung Hsing University, Taichung, 402, Taiwan
| | - Li-Sen Young
- Tetanti AgriBiotech Inc. No. 1, Gongyequ 10th Rd., Xitun Dist., Taichung, 40755, Taiwan
| | - Chiu-Chung Young
- Department of Soil & Environmental Sciences, College of Agriculture and Natural Resources, National Chung Hsing University, Taichung, 402, Taiwan; Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung, 402, Taiwan.
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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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Santra HK, Banerjee D. Antifungal activity of volatile and non-volatile metabolites of endophytes of Chloranthus elatior Sw. FRONTIERS IN PLANT SCIENCE 2023; 14:1156323. [PMID: 37265637 PMCID: PMC10229785 DOI: 10.3389/fpls.2023.1156323] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 04/18/2023] [Indexed: 06/03/2023]
Abstract
Agriculture crops that have fungal infections suffer significant economic losses and reduced crop output. Chemical fungicides are used to tackle the problem, although this has additional detrimental side effects. There is an urgent need for safe and novel antifungals. Volatiles from plant-beneficial endophytic fungi are considered promising alternatives for the biological control of fungal pathogens as a sustainable approach in an agroecosystem. In the present investigation, a volatile-emitting sterile endophytic fungus, Diaporthe sp. CEL3 with bio-fumigation activity, was isolated from leaves of the ethnomedicinal plant Chloranthus elatior Sw., collected from the Passighat forest of North-East India. The camphor odor volatiles of CEL3 showed an inhibitory effect against eight fungal pathogens in vitro and minimized the infections of Monilinia fructicola, a causal agent of cherry fruit rot, in VOC-exposed cherry fruits. Rhizoctonia solani, Botrytis cinerea, Pythium ultimum, and M. fructicola were maximally inhibited up to 51.5%, 55.8%, 61.9%, and 78.5%, respectively, in comparison to control by the volatiles. Another isolate, CEL7, identified as Curvularia sp., synthesized non-volatile, soluble antifungal metabolites in its cell-free extracts and exhibited antifungal action. Bioassay-guided fractionation revealed the presence of imidazole compounds- (2-aminoethyl)-1H-imidazole-2-carbaldehyde, Pyrazole 4, 5 imidazole, 1-formyl 3-ethyl, phenol compounds-Phenol, 4-[2-(methylamino) ethyl]-, 6-Nitro-3-chlorophenol, Phenol, 2,4,6-tri-tert-butyl-, etc., in the cell-free extracts, with a MIC value of 250-2,000 µg ml-1. Optimum VOC emission was achieved in a modified PDA medium with instantly smashed potato (150 g L-1), dextrose (20 g L-1), wheat husk (20 g L-1), and yeast extract (20 g L-1), with additional salts. Interestingly, endophytic CEL3 emitted different types of volatiles, and trans-verbenol (32.25%), geraniol (30.32%), trans-ocimenol (12.90%), and mentha-4,8-diene (5.16%) were the prime ones. These VOCs cause lethal leakage of protein and necessary intracellular molecules from the fungal pathogens. Thus, CEL3 could potentially be used as a bio-fumigating agent to control post-harvest infections caused by fungal pathogens. This study opens a new approach to the use of endophytic fungi in biocontrol.
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Affiliation(s)
- Hiran Kanti Santra
- Microbiology and Microbial Biotechnology Laboratory, Department of Botany and Forestry, Vidyasagar University, Midnapore, India
| | - Debdulal Banerjee
- Microbiology and Microbial Biotechnology Laboratory, Department of Botany and Forestry, Vidyasagar University, Midnapore, India
- Center for Life Sciences, Vidyasagar University, Midnapore, India
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10
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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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11
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Luo H, Riu M, Ryu CM, Yu JM. Volatile organic compounds emitted by Burkholderia pyrrocinia CNUC9 trigger induced systemic salt tolerance in Arabidopsis thaliana. Front Microbiol 2022; 13:1050901. [PMID: 36466674 PMCID: PMC9713481 DOI: 10.3389/fmicb.2022.1050901] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 11/02/2022] [Indexed: 08/01/2023] Open
Abstract
Salinity is among the most significant abiotic stresses that negatively affects plant growth and agricultural productivity worldwide. One ecofriendly tool for broadly improving plant tolerance to salt stress is the use of bio-inoculum with plant growth-promoting rhizobacteria (PGPR). In this study, a bacterium strain CNUC9, which was isolated from maize rhizosphere, showed several plant growth-promoting characteristics including the production of 1-aminocyclopropane-1-carboxylate deaminase, indole acetic acid, siderophore, and phosphate solubilization. Based on 16S rRNA and recA gene sequence analysis, we identified strain CNUC9 as Burkholderia pyrrocinia. Out of bacterial determinants to elicit plant physiological changes, we investigated the effects of volatile organic compounds (VOCs) produced by B. pyrrocinia CNUC9 on growth promotion and salinity tolerance in Arabidopsis thaliana. Higher germination and survival rates were observed after CNUC9 VOCs exposure under 100 mM NaCl stress. CNUC9 VOCs altered the root system architecture and total leaf area of A. thaliana compared to the control. A. thaliana exposed to VOCs induced salt tolerance by increasing its total soluble sugar and chlorophyll content. In addition, lower levels of reactive oxygen species, proline, and malondialdehyde were detected in CNUC9 VOCs-treated A. thaliana seedlings under stress conditions, indicating that VOCs emitted by CNUC9 protected the plant from oxidative damage induced by salt stress. VOC profiles were obtained through solid-phase microextraction and analyzed by gas chromatography coupled with mass spectrometry. Dimethyl disulfide (DMDS), methyl thioacetate, and 2-undecanone were identified as products of CNUC9. Our results indicate that optimal concentrations of DMDS and 2-undecanone promoted growth in A. thaliana seedlings. Our findings provide greater insight into the salt stress alleviation of VOCs produced by B. pyrrocinia CNUC9, as well as potential sustainable agriculture applications.
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Affiliation(s)
- Huan Luo
- Department of Applied Biology, Chungnam National University, Daejeon, South Korea
| | - Myoungjoo Riu
- Molecular Phytobacteriology Laboratory, Infectious Disease Research Center, KRIBB, Daejeon, South Korea
| | - Choong-Min Ryu
- Molecular Phytobacteriology Laboratory, Infectious Disease Research Center, KRIBB, Daejeon, South Korea
| | - Jun Myoung Yu
- Department of Applied Biology, Chungnam National University, Daejeon, South Korea
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12
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Pal G, Saxena S, Kumar K, Verma A, Sahu PK, Pandey A, White JF, Verma SK. Endophytic Burkholderia: Multifunctional roles in plant growth promotion and stress tolerance. Microbiol Res 2022; 265:127201. [PMID: 36167006 DOI: 10.1016/j.micres.2022.127201] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 07/21/2022] [Accepted: 09/13/2022] [Indexed: 11/19/2022]
Abstract
The genus Burkholderia has proven potential in improving plant performance. In recent decades, a huge diversity of Burkholderia spp. have been reported with diverse capabilities of plant symbiosis which could be harnessed to enhance plant growth and development. Colonization of endophytic Burkholderia spp. have been extensively studied through techniques like advanced microscopy, fluorescent labelling, PCR based assays, etc., and found to be systemically distributed in plants. Thus, use of these biostimulant microbes holds the promise of improving quality and quantity of crops. The endophytic Burkholderia spp. have been found to support plant functions along with boosting nutrient availability, especially under stress. Endophytic Burkholderia spp. improve plant survival against deadly pathogens via mechanisms like competition, induced systemic resistance, and antibiosis. At the same time, they are reported to extend plant tolerance towards multiple abiotic stresses especially drought, salinity, and cold. Several attempts have been made to decipher the potential of Burkholderia spp. by genome mining, and these bacteria have been found to harbour genes for plant symbiosis and for providing multiple benefits to host plants. Characteristics specific for host recognition and nutrient acquisition were confirmed in endophytic Burkholderia by genomics and proteomics-based studies. This could pave the way for harnessing Burkholderia spp. for biotechnological applications like biotransformation, phytoremediation, insecticidal activity, antimicrobials, etc. All these make Burkholderia spp. a promising microbial agent in improving plant performance under multiple adversities. Thus, the present review highlights critical roles of endophytic Burkholderia spp., their colonization, alleviation of biotic and abiotic stresses, biotechnological applications and genomic insights.
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Affiliation(s)
- Gaurav Pal
- Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi, UP, India
| | - Samiksha Saxena
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, India
| | - Kanchan Kumar
- Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi, UP, India
| | - Anand Verma
- Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi, UP, India
| | - Pramod K Sahu
- National Bureau of Agriculturally Important Microorganisms, Mau, UP, India
| | - Ashutosh Pandey
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, India
| | - James F White
- Department of Plant Biology, Rutgers University, New Brunswick, NJ, USA.
| | - Satish K Verma
- Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi, UP, India.
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13
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Burkholderia cenocepacia ETR-B22 volatile organic compounds suppress postharvest grey mould infection and maintain aroma quality of tomato fruit. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Lu C, Wang Q, Jiang Y, Zhang M, Meng X, Li Y, Liu B, Yin Z, Liu H, Peng C, Li F, Yue Y, Hao M, Sui Y, Wang L, Cheng G, Liu J, Chu Z, Zhu C, Dong H, Ding X. Discovery of a novel nucleoside immune signaling molecule 2'-deoxyguanosine in microbes and plants. J Adv Res 2022; 46:1-15. [PMID: 35811061 PMCID: PMC10105077 DOI: 10.1016/j.jare.2022.06.014] [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: 03/13/2022] [Revised: 05/16/2022] [Accepted: 06/27/2022] [Indexed: 11/27/2022] Open
Abstract
INTRODUCTION Beneficial microorganisms play essential roles in plant growth and induced systemic resistance (ISR) by releasing signaling molecules. Our previous study obtained the crude extract from beneficial endophyte Paecilomyces variotii, termed ZNC (ZhiNengCong), which significantly enhanced plant resistance to pathogen even at 100 ng/ml. However, the immunoreactive components of ZNC remain unclear. Here, we further identified one of the immunoreactive components of ZNC is a nucleoside 2'-deoxyguanosine (2-dG). OBJECTIVES This paper intends to reveal the molecular mechanism of microbial-derived 2'-deoxyguanosine (2-dG) in activating plant immunity, and the role of plant-derived 2-dG in plant immunity. METHODS The components of ZNC were separated using a high-performance liquid chromatography (HPLC), and 2-dG is identified using a HPLC-mass spectrometry system (LC-MS). Transcriptome analysis and genetic experiments were used to reveal the immune signaling pathway dependent on 2-dG activation of plant immunity. RESULTS This study identified 2'-deoxyguanosine (2-dG) as one of the immunoreactive components from ZNC. And 2-dG significantly enhanced plant pathogen resistance even at 10 ng/ml (37.42 nM). Furthermore, 2-dG-induced resistance depends on NPR1, pattern-recognition receptors/coreceptors, ATP receptor P2K1 (DORN1), ethylene signaling but not salicylic acid accumulation. In addition, we identified Arabidopsis VENOSA4 (VEN4) was involved in 2-dG biosynthesis and could convert dGTP to 2-dG, and vne4 mutant plants were more susceptible to pathogens. CONCLUSION In summary, microbial-derived 2-dG may act as a novel immune signaling molecule involved in plant-microorganism interactions, and VEN4 is 2-dG biosynthesis gene and plays a key role in plant immunity.
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Affiliation(s)
- Chongchong Lu
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Qingbin Wang
- Shandong Pengbo Biotechnology Co., LTD, Taian 271018, China; National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Yanke Jiang
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Min Zhang
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Xuanlin Meng
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Yang Li
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Baoyou Liu
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Ziyi Yin
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Haifeng Liu
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Chune Peng
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Fuchuan Li
- National Glycoengineering Research Center and Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, 72 Binhai Rd, Qingdao 266200, China
| | - Yingzhe Yue
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Mingxia Hao
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Yurong Sui
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Lulu Wang
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Guodong Cheng
- College of Veterinary Medicine, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Jianzhu Liu
- College of Veterinary Medicine, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Zhaohui Chu
- State Key Laboratory of Hybrid Rice, Hubei Hongshan Laboratory, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Changxiang Zhu
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Hansong Dong
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Xinhua Ding
- State Key Laboratory of Crop Biology, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Taian, Shandong 271018, China.
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15
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Xue L, Yang C, Jihong W, Lin L, Yuqiang Z, Zhitong J, Yanxin W, Zhoukun L, Lei F, Cui Z. Biocontrol potential of
Burkholderia
sp.
BV6
against the rice blast fungus
Magnaporthe oryzae. J Appl Microbiol 2022; 133:883-897. [DOI: 10.1111/jam.15605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 04/28/2022] [Indexed: 11/30/2022]
Affiliation(s)
- Luo Xue
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture and Rural Affairs, College of Life Sciences Nanjing Agricultural University Nanjing China
| | - Chen Yang
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture and Rural Affairs, College of Life Sciences Nanjing Agricultural University Nanjing China
| | - Wang Jihong
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture and Rural Affairs, College of Life Sciences Nanjing Agricultural University Nanjing China
| | - Liu Lin
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture and Rural Affairs, College of Life Sciences Nanjing Agricultural University Nanjing China
| | - Zhao Yuqiang
- Institute of Botany Jiangsu Province and Chinese Academy of Sciences China
| | - Jiang Zhitong
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture and Rural Affairs, College of Life Sciences Nanjing Agricultural University Nanjing China
| | - Wang Yanxin
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture and Rural Affairs, College of Life Sciences Nanjing Agricultural University Nanjing China
| | - Li Zhoukun
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture and Rural Affairs, College of Life Sciences Nanjing Agricultural University Nanjing China
| | - Fu Lei
- Nanjing Institute for Comprehensive Utilization of Wild Plants Nanjing China
| | - Zhongli Cui
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture and Rural Affairs, College of Life Sciences Nanjing Agricultural University Nanjing China
- Key Laboratory of Biological Interactions and Crop Health Nanjing Agricultural University Nanjing China
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16
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Kong WL, Wang WY, Zuo SH, Wu XQ. Genome Sequencing of Rahnella victoriana JZ-GX1 Provides New Insights Into Molecular and Genetic Mechanisms of Plant Growth Promotion. Front Microbiol 2022; 13:828990. [PMID: 35464970 PMCID: PMC9020876 DOI: 10.3389/fmicb.2022.828990] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Accepted: 03/07/2022] [Indexed: 12/02/2022] Open
Abstract
Genomic information for bacteria within the genus Rahnella remains limited. Rahnella sp. JZ-GX1 was previously isolated from the Pinus massoniana rhizosphere in China and shows potential as a plant growth-promoting (PGP) bacterium. In the present work, we combined the GridION Nanopore ONT and Illumina sequencing platforms to obtain the complete genome sequence of strain JZ-GX1, and the application effects of the strain in natural field environment was assessed. The whole genome of Rahnella sp. JZ-GX1 comprised a single circular chromosome (5,472,828 bp, G + C content of 53.53%) with 4,483 protein-coding sequences, 22 rRNAs, and 77 tRNAs. Based on whole genome phylogenetic and average nucleotide identity (ANI) analysis, the JZ-GX1 strain was reidentified as R. victoriana. Genes related to indole-3-acetic acid (IAA), phosphorus solubilization, nitrogen fixation, siderophores, acetoin, 1-aminocyclopropane-1-carboxylate (ACC) deaminase, gamma-aminobutyric acid (GABA) production, spermidine and volatile organic compounds (VOCs) biosynthesis were present in the genome of strain JZ-GX1. In addition, these functions were also confirmed by in vitro experiments. Importantly, compared to uninoculated control plants, Pyrus serotina, Malus spectabilis, Populus euramericana (Dode) Guinier cv. “San Martino” (I-72 poplar) and Pinus elliottii plants inoculated with strain JZ-GX1 showed increased heights and ground diameters. These findings improve our understanding of R. victoriana JZ-GX1 as a potential biofertilizer in agriculture.
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Affiliation(s)
- Wei-Liang Kong
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, China.,Jiangsu Key Laboratory for Prevention and Management of Invasive Species, Nanjing Forestry University, Nanjing, China
| | - Wei-Yu Wang
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, China.,Jiangsu Key Laboratory for Prevention and Management of Invasive Species, Nanjing Forestry University, Nanjing, China
| | - Sheng-Han Zuo
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, China.,Jiangsu Key Laboratory for Prevention and Management of Invasive Species, Nanjing Forestry University, Nanjing, China
| | - Xiao-Qin Wu
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, China.,Jiangsu Key Laboratory for Prevention and Management of Invasive Species, Nanjing Forestry University, Nanjing, China
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17
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Kashyap AS, Manzar N, Nebapure SM, Rajawat MVS, Deo MM, Singh JP, Kesharwani AK, Singh RP, Dubey SC, Singh D. Unraveling Microbial Volatile Elicitors Using a Transparent Methodology for Induction of Systemic Resistance and Regulation of Antioxidant Genes at Expression Levels in Chili against Bacterial Wilt Disease. Antioxidants (Basel) 2022; 11:antiox11020404. [PMID: 35204287 PMCID: PMC8869530 DOI: 10.3390/antiox11020404] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 02/05/2022] [Accepted: 02/09/2022] [Indexed: 12/10/2022] Open
Abstract
Microbial volatiles benefit the agricultural ecological system by promoting plant growth and systemic resistance against diseases without harming the environment. To explore the plant growth-promoting efficiency of VOCs produced by Pseudomonas fluorescens PDS1 and Bacillus subtilis KA9 in terms of chili plant growth and its biocontrol efficiency against Ralstonia solanacearum, experiments were conducted both in vitro and in vivo. A closure assembly was designed using a half-inverted plastic bottle to demonstrate plant–microbial interactions via volatile compounds. The most common volatile organic compounds were identified and reported; they promoted plant development and induced systemic resistance (ISR) against wilt pathogen R. solanacearum. The PDS1 and KA9 VOCs significantly increased defensive enzyme activity and overexpressed the antioxidant genes PAL, POD, SOD, WRKYa, PAL1, DEF-1, CAT-2, WRKY40, HSFC1, LOX2, and NPR1 related to plant defense. The overall gene expression was greater in root tissue as compared to leaf tissue in chili plant. Our findings shed light on the relationship among rhizobacteria, pathogen, and host plants, resulting in plant growth promotion, disease suppression, systemic resistance-inducing potential, and antioxidant response with related gene expression in the leaf and root tissue of chili.
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Affiliation(s)
- Abhijeet Shankar Kashyap
- Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India; (A.K.K.); (R.P.S.)
- Plant Pathology Laboratory, ICAR-National Bureau of Agriculturally Important Microorganisms, Maunath Bhanjan 275103, India; (N.M.); (M.V.S.R.); (J.P.S.)
- Correspondence: (A.S.K.); (D.S.)
| | - Nazia Manzar
- Plant Pathology Laboratory, ICAR-National Bureau of Agriculturally Important Microorganisms, Maunath Bhanjan 275103, India; (N.M.); (M.V.S.R.); (J.P.S.)
| | | | - Mahendra Vikram Singh Rajawat
- Plant Pathology Laboratory, ICAR-National Bureau of Agriculturally Important Microorganisms, Maunath Bhanjan 275103, India; (N.M.); (M.V.S.R.); (J.P.S.)
| | - Man Mohan Deo
- Farm Machinery and Power, ICAR-Indian Institute of Pulses Research, Kanpur 208024, India;
| | - Jyoti Prakash Singh
- Plant Pathology Laboratory, ICAR-National Bureau of Agriculturally Important Microorganisms, Maunath Bhanjan 275103, India; (N.M.); (M.V.S.R.); (J.P.S.)
- Division of Biochemistry, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India
| | - Amit Kumar Kesharwani
- Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India; (A.K.K.); (R.P.S.)
| | - Ravinder Pal Singh
- Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India; (A.K.K.); (R.P.S.)
| | - S. C. Dubey
- Division of Plant Quarantine, ICAR-NBPGR, New Delhi 110012, India;
- Krishi Bhawan, Indian Council of Agricultural Research, New Delhi 110001, India
| | - Dinesh Singh
- Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India; (A.K.K.); (R.P.S.)
- Correspondence: (A.S.K.); (D.S.)
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Antifungal volatile organic compounds from Streptomyces setonii WY228 control black spot disease of sweet potato. Appl Environ Microbiol 2022; 88:e0231721. [PMID: 35108080 DOI: 10.1128/aem.02317-21] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Volatile organic compounds (VOCs) produced by microorganisms are considered as promising environmental-safety fumigants for controlling postharvest diseases. Ceratocystis fimbriata, the pathogen of black spot disease, seriously affects the quality and yield of sweet potato in the field and postharvest. This study tested the effects of VOCs produced by Streptomyces setonii WY228 on the control of C. fimbriata in vitro and in vivo. The VOCs exhibited strong antifungal activity and significantly inhibited the growth of C. fimbriata. During the 20-days storage, VOCs fumigation significantly controlled the occurrence of pathogen, increased the content of antioxidant and defense-related enzymes and flavonoids, and boosted the starch content so as to maintain the quality of sweet potato. Headspace analysis showed that volatiles 2-ethyl-5-methylpyrazine and dimethyl disulfide significantly inhibited the mycelial growth and spore germination of C. fimbriata in a dose dependent manner. Fumigation with 100 μL/L 2-ethyl-5-methylpyrazine completely controlled the pathogen in vivo after 10-days storage. Transcriptome analysis showed that volatiles mainly downregulated the ribosomal synthesis genes and activated the proteasome system of pathogen in response to VOCs stress, while the genes related to spore development, cell membrane synthesis, mitochondrial function, as well as hydrolase and toxin synthesis were also downregulated, indicating that WY228-produced VOCs act diverse modes of action for pathogen control. Our study demonstrates that fumigation of sweet potato tuberous roots with S. setonii WY228 or use of formulations based on the VOCs is a promising new strategy to control sweet potato and other food and fruit pathogens during storage and shipment. Importance Black spot disease caused by Ceratocystis fimbriata has caused huge economic losses to worldwide sweet potato production. At present, the control of C. fimbriata mainly depends on toxic fungicides, and there is a lack of effective alternative strategies. The research on biological control of sweet potato black spot disease is also very limited. The development of efficient biocontrol technique against pathogens using microbial volatile organic compounds could be an alternative method to control this disease. Our study revealed the significant biological control effect of volatile organic compounds of Streptomyces setonii WY228 on black spot disease of postharvest sweet potato and the complex antifungal mechanism against C. fimbriata. Our data demonstrated that Streptomyces setonii WY228 and its volatile 2-ethyl-5-methylpyrazine could be candidate strain and compound for the creation of fumigants, and showed the important potential of biotechnology application in the field of food and agriculture.
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Bach E, Passaglia LMP, Jiao J, Gross H. Burkholderia in the genomic era: from taxonomy to the discovery of new antimicrobial secondary metabolites. Crit Rev Microbiol 2021; 48:121-160. [PMID: 34346791 DOI: 10.1080/1040841x.2021.1946009] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Species of Burkholderia are highly versatile being found not only abundantly in soil, but also as plants and animals' commensals or pathogens. Their complex multireplicon genomes harbour an impressive number of polyketide synthase (PKS) and nonribosomal peptide-synthetase (NRPS) genes coding for the production of antimicrobial secondary metabolites (SMs), which have been successfully deciphered by genome-guided tools. Moreover, genome metrics supported the split of this genus into Burkholderia sensu stricto (s.s.) and five new other genera. Here, we show that the successful antimicrobial SMs producers belong to Burkholderia s.s. Additionally, we reviewed the occurrence, bioactivities, modes of action, structural, and biosynthetic information of thirty-eight Burkholderia antimicrobial SMs shedding light on their diversity, complexity, and uniqueness as well as the importance of genome-guided strategies to facilitate their discovery. Several Burkholderia NRPS and PKS display unusual features, which are reflected in their structural diversity, important bioactivities, and varied modes of action. Up to now, it is possible to observe a general tendency of Burkholderia SMs being more active against fungi. Although the modes of action and biosynthetic gene clusters of many SMs remain unknown, we highlight the potential of Burkholderia SMs as alternatives to fight against new diseases and antibiotic resistance.
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Affiliation(s)
- Evelise Bach
- Departamento de Genética and Programa de Pós-graduação em Genética e Biologia Molecular, Instituto de Biociências, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Luciane Maria Pereira Passaglia
- Departamento de Genética and Programa de Pós-graduação em Genética e Biologia Molecular, Instituto de Biociências, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Junjing Jiao
- Department for Pharmaceutical Biology, Pharmaceutical Institute, University of Tübingen, Tübingen, Germany
| | - Harald Gross
- Department for Pharmaceutical Biology, Pharmaceutical Institute, University of Tübingen, Tübingen, Germany
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Bacteria associated with vascular wilt of poplar. Arch Microbiol 2021; 203:4829-4838. [PMID: 34213597 PMCID: PMC8502120 DOI: 10.1007/s00203-021-02464-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 06/10/2021] [Accepted: 06/25/2021] [Indexed: 10/31/2022]
Abstract
In 2017, a 560-ha area of hybrid poplar plantation in northern Poland showed symptoms of tree decline. Leaves appeared smaller, turned yellow-brown, and were shed prematurely. Twigs and smaller branches died. Bark was sunken and discolored, often loosened and split. Trunks decayed from the base. Phloem and xylem showed brown necrosis. Ten per cent of trees died in 1-2 months. None of these symptoms was typical for known poplar diseases. Bacteria in soil and in the necrotic base of poplar trunk were analyzed with Illumina sequencing. Soil and wood were colonized by at least 615 and 249 taxa. The majority of bacteria were common to soil and wood. The most common taxa in soil were: Acidobacteria (14.76%), Actinobacteria (14.58%), Proteobacteria (36.87) with Betaproteobacteria (6.52%), (6.10%), Comamonadaceae (2.79%), and Verrucomicrobia (5.31%).The most common taxa in wood were: Bacteroidetes (22.72%) including Chryseobacterium (5.07%), Flavobacteriales (10.87%), Sphingobacteriales (9.40%) with Pedobacter cryoconitis (7.31%), Proteobacteria (73.79%) with Enterobacteriales (33.25%) including Serratia (15.30%) and Sodalis (6.52%), Pseudomonadales (9.83%) including Pseudomonas (9.02%), Rhizobiales (6.83%), Sphingomonadales (5.65%), and Xanthomonadales (11.19%). Possible pathogens were Pseudomonas, Rhizobium and Xanthomonas. The potential initial, endophytic character of bacteria is discussed. Soil and possibly planting material might be the reservoir of pathogen inoculum.
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