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Romero-Contreras YJ, Gonzalez-Serrano F, Formey D, Aragón W, Chacón FI, Torres M, Cevallos MÁ, Dib JR, Rebollar EA, Serrano M. Amphibian skin bacteria display antifungal activity and induce plant defense mechanisms against Botrytis cinerea. FRONTIERS IN PLANT SCIENCE 2024; 15:1392637. [PMID: 38654899 PMCID: PMC11035788 DOI: 10.3389/fpls.2024.1392637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Accepted: 03/25/2024] [Indexed: 04/26/2024]
Abstract
Botrytis cinerea is the causal agent of gray mold, which affects a wide variety of plant species. Chemical agents have been used to prevent the disease caused by this pathogenic fungus. However, their toxicity and reduced efficacy have encouraged the development of new biological control alternatives. Recent studies have shown that bacteria isolated from amphibian skin display antifungal activity against plant pathogens. However, the mechanisms by which these bacteria act to reduce the effects of B. cinerea are still unclear. From a diverse collection of amphibian skin bacteria, three proved effective in inhibiting the development of B. cinerea under in vitro conditions. Additionally, the individual application of each bacterium on the model plant Arabidopsis thaliana, Solanum lycopersicum and post-harvest blueberries significantly reduced the disease caused by B. cinerea. To understand the effect of bacteria on the host plant, we analyzed the transcriptomic profile of A. thaliana in the presence of the bacterium C32I and the fungus B. cinerea, revealing transcriptional regulation of defense-related hormonal pathways. Our study shows that bacteria from the amphibian skin can counteract the activity of B. cinerea by regulating the plant transcriptional responses.
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Affiliation(s)
- Yordan J. Romero-Contreras
- Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, Mexico
- Programa de Doctorado en Ciencias Biomédicas, Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Francisco Gonzalez-Serrano
- Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, Mexico
- Programa de Doctorado en Ciencias Biomédicas, Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Damien Formey
- Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, Mexico
| | - Wendy Aragón
- Instituto de Biociencias, Universidad Autónoma de Chiapas, Tapachula, Chiapas, Mexico
| | - Florencia Isabel Chacón
- Planta Piloto de Procesos Industriales Microbiológicos (PROIM) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Tucumán, Argentina
| | - Martha Torres
- Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, Mexico
| | - Miguel Ángel Cevallos
- Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, Mexico
| | - Julian Rafael Dib
- Planta Piloto de Procesos Industriales Microbiológicos (PROIM) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Tucumán, Argentina
- Instituto de Microbiología, Universidad Nacional de Tucumán, Tucumán, Argentina
| | - Eria A. Rebollar
- Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, Mexico
| | - Mario Serrano
- Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, Mexico
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Ampntelnour L, Poulaki EG, Dimitrakas V, Mavrommati M, Amourgis GG, Tjamos SE. Enhancing Botrytis disease management in tomato plants: insights from a Pseudomonas putida strain with biocontrol activity. J Appl Microbiol 2024; 135:lxae094. [PMID: 38599633 DOI: 10.1093/jambio/lxae094] [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: 01/19/2024] [Revised: 03/25/2024] [Accepted: 04/09/2024] [Indexed: 04/12/2024]
Abstract
AIMS This study explores the biocontrol potential of Pseudomonas putida Z13 against Botrytis cinerea in tomato plants, addressing challenges posed by the pathogen's fungicide resistance. The aims of the study were to investigate the in vitro and in silico biocontrol traits of Z13, identify its plant-colonizing efficacy, evaluate the efficacy of different application strategies against B. cinerea in planta, and assess the capacity of Z13 to trigger induced systemic resistance (ISR) in plants. METHODS AND RESULTS The in vitro experiments revealed that Z13 inhibits the growth of B. cinerea, produces siderophores, and exhibits swimming and swarming activity. Additionally, the Z13 genome harbors genes that encode compounds triggering ISR, such as pyoverdine and pyrroloquinoline quinone. The in planta experiments demonstrated Z13's efficacy in effectively colonizing the rhizosphere and leaves of tomato plants. Therefore, three application strategies of Z13 were evaluated against B. cinerea: root drenching, foliar spray, and the combination of root drenching and foliar spray. It was demonstrated that the most effective treatment of Z13 against B. cinerea was the combination of root drenching and foliar spray. Transcriptomic analysis showed that Z13 upregulates the expression of the plant defense-related genes PR1 and PIN2 upon B. cinerea inoculation. CONCLUSION The results of the study demonstrated that Z13 possesses significant biocontrol traits, such as the production of siderophores, resulting in significant plant protection against B. cinerea when applied as a single treatment to the rhizosphere or in combination with leaf spraying. Additionally, it was shown that Z13 root colonization primes plant defenses against the pathogen.
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Affiliation(s)
- Litsa Ampntelnour
- Laboratory of Phytopathology, Agricultural University of Athens, 75 Iera Odos str., 11855 Athens, Greece
| | - Eirini G Poulaki
- Laboratory of Phytopathology, Agricultural University of Athens, 75 Iera Odos str., 11855 Athens, Greece
| | - Vasilis Dimitrakas
- Laboratory of Phytopathology, Agricultural University of Athens, 75 Iera Odos str., 11855 Athens, Greece
| | - Maria Mavrommati
- Laboratory of Phytopathology, Agricultural University of Athens, 75 Iera Odos str., 11855 Athens, Greece
| | - Grigorios G Amourgis
- Laboratory of Phytopathology, Agricultural University of Athens, 75 Iera Odos str., 11855 Athens, Greece
| | - Sotiris E Tjamos
- Laboratory of Phytopathology, Agricultural University of Athens, 75 Iera Odos str., 11855 Athens, Greece
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Berg G, Dorador C, Egamberdieva D, Kostka JE, Ryu CM, Wassermann B. Shared governance in the plant holobiont and implications for one health. FEMS Microbiol Ecol 2024; 100:fiae004. [PMID: 38364305 PMCID: PMC10876113 DOI: 10.1093/femsec/fiae004] [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: 09/15/2023] [Revised: 10/30/2023] [Accepted: 02/12/2024] [Indexed: 02/18/2024] Open
Abstract
The holobiont Holobiont theory is more than 80 years old, while the importance of microbial communities for plant holobionts was already identified by Lorenz Hiltner more than a century ago. Both concepts are strongly supported by results from the new field of microbiome research. Here, we present ecological and genetic features of the plant holobiont that underpin principles of a shared governance between hosts and microbes and summarize the relevance of plant holobionts in the context of global change. Moreover, we uncover knowledge gaps that arise when integrating plant holobionts in the broader perspective of the holobiome as well as one and planetary health concepts. Action is needed to consider interacting holobionts at the holobiome scale, for prediction and control of microbiome function to improve human and environmental health outcomes.
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Affiliation(s)
- Gabriele Berg
- Institute of Environmental Biotechnology, Graz University of Technology, Petersgasse 12/I, 8010 Graz, Austria
- Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Max-Eyth-Allee 100, 14469 Potsdam, Germany
- Institute for Biochemistry and Biology, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany
| | - Cristina Dorador
- Department of Biotechnology, Universidad de Antofagasta & Centre for Biotechnology and Bioengineering (CeBiB), Angamos 601, Antofagasta, Chile
| | - Dilfuza Egamberdieva
- Institute of Fundamental and Applied Research, National Research University, TIIAME, Kari Niyazi street 39, Tashkent 100000, Uzbekistan
- Medical School, Central Asian University, Milliy bog street 264, Tashkent 111221, Uzbekistan
| | - Joel E Kostka
- Schools of Biological Sciences and Earth & Atmospheric Sciences, Center for Microbial Dynamics and Infection, Georgia Institute of Technology, 310 Ferst Drive, Atlanta, GA 30332, United States
| | - Choong-Min Ryu
- Biosystems and Bioengineering, University of Science and Technology KRIBB School, 125 Gwahangro, Yuseong, Daejeon 34141, South Korea
- Molecular Phytobacteriology Laboratory, Infectious Disease Research Center, KRIBB, 125 Gwahangro, Yuseong, Daejeon 34141, South Korea
| | - Birgit Wassermann
- Institute of Environmental Biotechnology, Graz University of Technology, Petersgasse 12/I, 8010 Graz, Austria
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Li Z, Li J, Yu M, Quandahor P, Tian T, Shen T. Bacillus velezensis FX-6 suppresses the infection of Botrytis cinerea and increases the biomass of tomato plants. PLoS One 2023; 18:e0286971. [PMID: 37319286 PMCID: PMC10270589 DOI: 10.1371/journal.pone.0286971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 05/29/2023] [Indexed: 06/17/2023] Open
Abstract
Botrytis cinerea causing tomato gray mold is a major cause of economic loss in tomato production. It is urgent and necessary to seek an effective and environmentally friendly control strategy to control tomato grey mold disease. In this study, Bacillus velezensis FX-6 isolated from the rhizosphere of plants displayed significant inhibitory ability against B. cinerea and could promote tomato plant growth. FX-6 could effectively inhibit the growth of Botrytis cinerea mycelium in vitro and in vivo, and the inhibitory rate in vitro could reach 78.63%. According to morphological observations and phylogenetic trees based on sequences of the 16S rDNA and gyrA (DNA gyrase subunit A) genes, the strain FX-6 was identified as Bacillus velezensis. In addition, B. velezensis FX-6 showed antagonistic activity against seven phytopathogens, this indicated that FX-6 had broad-spectrum biocontrol activity. We also found that FX-6 fermentation broth had the strongest antagonistic activity against B. cinerea when the culture time was 72 hours, and the inhibition rate was 76.27%. The growth promotion test revealed that strain FX-6 significantly promoted tomato seed germination and seedling growth. Further deeply study on growth-promoting mechanism indicated that the FX-6 produced IAA and siderophore, and had ACC deaminase activity. The trait of significant biological control activity and growth promoting effect on tomato imply that B. velezensis FX-6 has the potential to be used as a biocontrol agent for tomato gray mold management.
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Affiliation(s)
- Zhaoyu Li
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu Province, China
| | - Jiajia Li
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu Province, China
| | - Mei Yu
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu Province, China
| | | | - Tian Tian
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu Province, China
| | - Tong Shen
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu Province, China
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Wang S, Chen S, Wang B, Li Q, Zu J, Yu J, Ding Z, Zhou F. Screening of endophytic fungi from Cremastra appendiculata and their potential for plant growth promotion and biological control. Folia Microbiol (Praha) 2023; 68:121-133. [PMID: 35982376 DOI: 10.1007/s12223-022-00995-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 07/21/2022] [Indexed: 11/27/2022]
Abstract
Biocontrol fungi are widely used to promote plant growth and pest control. Four fungi were isolated from Cremastra appendiculata tubers and screened for plant growth-promoting and antagonistic effects. Based on the morphological characterization and ITS, 18S rRNA and 28S rRNA gene sequencing analysis, the fungi were identified to be related to Colletotrichum gloeosporioides (DJL-6), Trichoderma tomentosum (DJL-9), Colletotrichum godetiae (DJL-10) and Talaromyces amestolkiae (DJL-15). The growth inhibition tests showed that the four isolates had different inhibitory effects on Colletotrichum fructicola, Alternaria alternata and Alternaria longipes, among which DJL-9 showed the highest inhibitory activity. Their culture filtrates (especially that of DJL-15) can also inhibit pathogens. Four isolates were positive for the production of indole-3-acid (IAA) and β-1,3-glucanase and possessed proteolytic activity but were negative for the production of iron siderophore complexes. The four fungi showed strong nitrogen fixation and potassium dissolution abilities. In addition to DJL-9 being able to solubilize phosphate, DJL-10 was able to produce chitinase and cellulase. Pot experiments indicated that the four fungi increased the germination rate of C. appendiculata and soybean seeds and increased soybean radicle growth and plant biomass. Among them, DJL-6 had a better growth-promoting effect. Therefore, we successfully screened the biocontrol potential of endophytes from C. appendiculata, with a focus on preventing fungal diseases and promoting plant growth, and selected strains that could provide nutrients and hormones for plant growth.
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Affiliation(s)
- Siyu Wang
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, 310053, China
| | - Senmiao Chen
- School of Life Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, 310053, China
| | - Bixu Wang
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, 310053, China
| | - Qianxi Li
- School of Life Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, 310053, China
| | - Jiaqi Zu
- School of Life Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, 310053, China
| | - Jie Yu
- Puer Kunhong Biotechnology Company, Group C of Chamagu Town A, Simao District, Puer, Yunnan, 665000, China
| | - Zhishan Ding
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, 310053, China
| | - Fangmei Zhou
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, 310053, China.
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Palumbo M, Attolico G, Capozzi V, Cozzolino R, Corvino A, de Chiara MLV, Pace B, Pelosi S, Ricci I, Romaniello R, Cefola M. Emerging Postharvest Technologies to Enhance the Shelf-Life of Fruit and Vegetables: An Overview. Foods 2022; 11:foods11233925. [PMID: 36496732 PMCID: PMC9737221 DOI: 10.3390/foods11233925] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 11/23/2022] [Accepted: 11/28/2022] [Indexed: 12/09/2022] Open
Abstract
Quality losses in fresh produce throughout the postharvest phase are often due to the inappropriate use of preservation technologies. In the last few decades, besides the traditional approaches, advanced postharvest physical and chemical treatments (active packaging, dipping, vacuum impregnation, conventional heating, pulsed electric field, high hydrostatic pressure, and cold plasma) and biocontrol techniques have been implemented to preserve the nutritional value and safety of fresh produce. The application of these methodologies after harvesting is useful when addressing quality loss due to the long duration when transporting products to distant markets. Among the emerging technologies and contactless and non-destructive techniques for quality monitoring (image analysis, electronic noses, and near-infrared spectroscopy) present numerous advantages over the traditional, destructive methods. The present review paper has grouped original studies within the topic of advanced postharvest technologies, to preserve quality and reduce losses and waste in fresh produce. Moreover, the effectiveness and advantages of some contactless and non-destructive methodologies for monitoring the quality of fruit and vegetables will also be discussed and compared to the traditional methods.
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Affiliation(s)
- Michela Palumbo
- Department of Science of Agriculture, Food and Environment, University of Foggia, Via Napoli, 25, 71122 Foggia, Italy
- Institute of Sciences of Food Production, National Research Council of Italy (CNR), c/o CS-DAT, Via Michele Protano, 71121 Foggia, Italy
| | - Giovanni Attolico
- Institute on Intelligent Industrial Systems and Technologies for Advanced Manufacturing, National Research Council of Italy (CNR), Via G. Amendola, 122/O, 70126 Bari, Italy
| | - Vittorio Capozzi
- Institute of Sciences of Food Production, National Research Council of Italy (CNR), c/o CS-DAT, Via Michele Protano, 71121 Foggia, Italy
| | - Rosaria Cozzolino
- Institute of Food Science, National Research Council (CNR), Via Roma 64, 83100 Avellino, Italy
- Correspondence: (R.C.); (B.P.); Tel.: +39-0825-299111 (R.C.); +39-0881-630210 (B.P.)
| | - Antonia Corvino
- Institute of Sciences of Food Production, National Research Council of Italy (CNR), c/o CS-DAT, Via Michele Protano, 71121 Foggia, Italy
| | - Maria Lucia Valeria de Chiara
- Department of Science of Agriculture, Food and Environment, University of Foggia, Via Napoli, 25, 71122 Foggia, Italy
- Institute of Sciences of Food Production, National Research Council of Italy (CNR), c/o CS-DAT, Via Michele Protano, 71121 Foggia, Italy
| | - Bernardo Pace
- Institute of Sciences of Food Production, National Research Council of Italy (CNR), c/o CS-DAT, Via Michele Protano, 71121 Foggia, Italy
- Correspondence: (R.C.); (B.P.); Tel.: +39-0825-299111 (R.C.); +39-0881-630210 (B.P.)
| | - Sergio Pelosi
- Institute of Sciences of Food Production, National Research Council of Italy (CNR), c/o CS-DAT, Via Michele Protano, 71121 Foggia, Italy
| | - Ilde Ricci
- Institute of Sciences of Food Production, National Research Council of Italy (CNR), c/o CS-DAT, Via Michele Protano, 71121 Foggia, Italy
| | - Roberto Romaniello
- Department of Science of Agriculture, Food and Environment, University of Foggia, Via Napoli, 25, 71122 Foggia, Italy
| | - Maria Cefola
- Institute of Sciences of Food Production, National Research Council of Italy (CNR), c/o CS-DAT, Via Michele Protano, 71121 Foggia, Italy
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Yi YJ, Yin YN, Yang YA, Liang YQ, Shan YT, Zhang CF, Zhang YR, Liang ZP. Antagonistic Activity and Mechanism of Bacillus subtilis XZ16-1 Suppression of Wheat Powdery Mildew and Growth Promotion of Wheat. PHYTOPATHOLOGY 2022; 112:2476-2485. [PMID: 35819334 DOI: 10.1094/phyto-04-22-0118-r] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Wheat powdery mildew caused by Blumeria graminis f. sp. tritici (Bgt) is one of the most serious wheat diseases in the world. Biological control is considered an environmentally safe approach to control plant diseases. Here, to develop effective biocontrol agents for controlling wheat powdery mildew, antagonistic strain XZ16-1 was isolated and identified as Bacillus subtilis based on the morphological, biochemical, and physiological characteristics and 16S rDNA sequence. The culture filtrate of B. subtilis XZ16-1 and its extracts had a significant inhibitory effect on the spore germination of Bgt. Moreover, the therapeutic and prevention efficacy of the 100% culture filtrate on wheat powdery mildew reached 81.18 and 83.72%, respectively, which was better than that of chemical fungicide triadimefon. Further antimicrobial mechanism analysis showed that the XZ16-1 culture filtrate could inhibit the development of powdery mildew spores by disrupting the cell membrane integrity, causing reductions in the mitochondrial membrane potential, and inducing the accumulation of reactive oxygen species in the spores. Biochemical detection indicated that XZ16-1 could solubilize phosphate, fix nitrogen, and produce hydrolases, lipopeptides, siderophores, and indole-3-acetic acid. Defense-related enzymes activated in wheat seedlings treated with the culture filtrate indicated that disease resistance was induced in wheat to resist pathogens. Furthermore, a 106 CFU/ml suspension of XZ16-1 increased the height, root length, fresh weight, and dry weight of wheat seedlings by 77.13, 63.46, 76.73, and 19.16%, respectively, and showed good growth-promotion properties. This study investigates the antagonistic activity and reveals the action mechanism of XZ16-1, which can provide an effective microbial agent for controlling wheat powdery mildew.
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Affiliation(s)
- Yan-Jie Yi
- School of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Ya-Nan Yin
- School of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Ying-Ao Yang
- School of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Yu-Qian Liang
- School of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - You-Tian Shan
- School of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Chang-Fu Zhang
- School of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Yu-Rong Zhang
- College of Food Science and Technology, Henan University of Technology, Zhengzhou 450001, China
| | - Zhen-Pu Liang
- College of Life Science, Henan Agricultural University, Zhengzhou 450002, China
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8
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Olanrewaju OS, Babalola OO. Plant growth-promoting rhizobacteria for orphan legume production: Focus on yield and disease resistance in Bambara groundnut. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2022. [DOI: 10.3389/fsufs.2022.922156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Orphan legumes are now experiencing growing demand due to the constraints on available major food crops. However, due to focus on major food crops, little research has been conducted on orphan legumes compared to major food crops, especially in microbiome application to improve growth and yield. Recent developments have demonstrated the enormous potential of beneficial microbes in growth promotion and resistance to stress and diseases. Hence, the focus of this perspective is to examine the potential of plant growth promoting rhizobacteria (PGPR) to improve Bambara groundnut yield and quality. Further insights into the potential use of PGPR as a biological control agent in the crop are discussed. Finally, three PGPR genera commonly associated with plant growth and disease resistance (Bacillus, Pseudomonas, and Streptomyces) were highlighted as case studies for the growth promotion and disease control in BGN production.
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Epiphytic and endophytic microorganisms associated to different cultivar of tomato fruits in greenhouse environment and characterization of beneficial bacterial strains for the control of post-harvest tomato pathogens. Int J Food Microbiol 2022; 379:109861. [DOI: 10.1016/j.ijfoodmicro.2022.109861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 07/21/2022] [Accepted: 07/27/2022] [Indexed: 11/18/2022]
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10
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Xu W, Yang Q, Yang F, Xie X, Goodwin PH, Deng X, Tian B, Yang L. Evaluation and Genome Analysis of Bacillus subtilis YB-04 as a Potential Biocontrol Agent Against Fusarium Wilt and Growth Promotion Agent of Cucumber. Front Microbiol 2022; 13:885430. [PMID: 35756052 PMCID: PMC9218633 DOI: 10.3389/fmicb.2022.885430] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 05/06/2022] [Indexed: 12/13/2022] Open
Abstract
Cucumber wilt caused by Fusarium oxysporum f.sp. cucumerinum (Foc) is a highly destructive disease that leads to reduced yield in cucumbers. In this study, strain YB-04 was isolated from wheat straw and identified as Bacillus subtilis. It displayed strong antagonistic activity against F. oxysporum f.sp. cucumerinum in dual culture and exhibited significant biocontrol of cucumber Fusarium wilt with a higher control effect than those of previously reported Bacillus strains and displayed pronounced growth promotion of cucumber seedlings. B. subtilis YB-04 could secrete extracellular protease, amylase, cellulose, and β-1,3-glucanase and be able to produce siderophores and indole acetic acid. Inoculation with B. subtilis YB-04 or Foc increased cucumber defense-related enzyme activities for PPO, SOD, CAT, PAL, and LOX. However, the greatest increase was with the combination of B. subtilis YB-04 and Foc. Sequencing the genome of B. subtilis YB-04 showed that it had genes for the biosynthesis of various secondary metabolites, carbohydrate-active enzymes, and assimilation of nitrogen, phosphorous, and potassium. B. subtilis YB-04 appears to be a promising biological control agent against the Fusarium wilt of cucumber and promotes cucumber growth by genomic, physiological, and phenotypic analysis.
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Affiliation(s)
- Wen Xu
- Henan International Joint Laboratory of Crop Protection, Henan Biopesticide Engineering Research Center, Institute of Plant Protection Research, Graduate T&R Base of Zhengzhou University, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Qian Yang
- Henan International Joint Laboratory of Crop Protection, Henan Biopesticide Engineering Research Center, Institute of Plant Protection Research, Graduate T&R Base of Zhengzhou University, Henan Academy of Agricultural Sciences, Zhengzhou, China.,School of Agricultural Sciences, Zhengzhou University, Zhengzhou, China
| | - Fan Yang
- Institute of Horticulture, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Xia Xie
- Henan International Joint Laboratory of Crop Protection, Henan Biopesticide Engineering Research Center, Institute of Plant Protection Research, Graduate T&R Base of Zhengzhou University, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Paul H Goodwin
- School of Environmental Sciences, University of Guelph, Guelph, ON, Canada
| | - Xiaoxu Deng
- Henan International Joint Laboratory of Crop Protection, Henan Biopesticide Engineering Research Center, Institute of Plant Protection Research, Graduate T&R Base of Zhengzhou University, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Baoming Tian
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou, China
| | - Lirong Yang
- Henan International Joint Laboratory of Crop Protection, Henan Biopesticide Engineering Research Center, Institute of Plant Protection Research, Graduate T&R Base of Zhengzhou University, Henan Academy of Agricultural Sciences, Zhengzhou, China
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An Evaluation of Aluminum Tolerant Pseudomonas aeruginosa A7 for In Vivo Suppression of Fusarium Wilt of Chickpea Caused by Fusarium oxysporum f. sp. ciceris and Growth Promotion of Chickpea. Microorganisms 2022; 10:microorganisms10030568. [PMID: 35336143 PMCID: PMC8950562 DOI: 10.3390/microorganisms10030568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 01/30/2022] [Accepted: 02/07/2022] [Indexed: 02/05/2023] Open
Abstract
Chickpea wilt, caused by Fusarium oxysporum f. sp. ciceris, is a disease that decreases chickpea productivity and quality and can reduce its yield by as much as 15%. A newly isolated, moss rhizoid-associated Pseudomonas aeruginosa strain A7, demonstrated strong inhibition of Fusarium oxysporum f. sp. ciceris growth. An in vitro antimicrobial assay revealed A7 to suppress the growth of several fungal and bacterial plant pathogens by secreting secondary metabolites and by producing volatile compounds. In an in vivo pot experiment with Fusarium wilt infection in chickpea, the antagonist A7 exhibited a disease reduction by 77 ± 1.5%, and significantly reduced the disease incidence and severity indexes. Furthermore, A7 promoted chickpea growth in terms of root and shoot length and dry biomass during pot assay. The strain exhibited several traits associated with plant growth promotion, extracellular enzymatic production, and stress tolerance. Under aluminum stress conditions, in vitro growth of chickpea plants by A7 resulted in a significant increase in root length and plant biomass production. Additionally, hallmark genes for antibiotics production were identified in A7. The methanol extract of strain A7 demonstrated antimicrobial activity, leading to the identification of various antimicrobial compounds based on retention time and molecular weight. These findings strongly suggest that the strain’s significant biocontrol potential and plant growth enhancement could be a potential environmentally friendly process in agricultural crop production.
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Sun N, Wang Y, Chen J, Wang P, Song W, Ma P, Duan Y, Jiao Z, Li Y. Colonization and Interaction of Bacteria Associated With Chinese Chives Affected by Ecological Compartments and Growth Conditions. Front Microbiol 2022; 13:775002. [PMID: 35237245 PMCID: PMC8883035 DOI: 10.3389/fmicb.2022.775002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 01/14/2022] [Indexed: 11/13/2022] Open
Abstract
Chinese chive has a long history of planting in China. At present, there are many studies on endophytic bacteria and rhizosphere microorganisms of Chinese chive, but the effects of ecological compartment and growth conditions on bacterial communities in Chinese chives are unclear. Here, we aimed to elucidate the differences in bacterial a-diversity, β-diversity, community structure, core species differences, interaction networks and predicted metabolic functions among bacterial communities in different ecological compartments (the phylloplane, leaf endosphere, stem endosphere, root endosphere, and rhizosphere) in Chinese chives in an open field, a solar greenhouse, an arched shed, and a hydroponic system. Sixty samples were collected from these five ecological compartments under four growth conditions, and we compared the bacterial profiles of these groups using 16S rRNA sequencing. We evaluated the differences in diversity and composition among bacterial communities in these ecological compartments, analyzed the bacterial interaction patterns under the different growth conditions, and predicted the bacterial metabolic pathways in these ecological compartments and growth conditions. The results showed that the effects of ecological compartments on bacterial diversity, community composition, interaction network pattern, and functional expression of Chinese chives were greater than those of growth condition. Ecological compartments (R2 = 0.5292) could better explain bacterial community division than growth conditions (R2 = 0.1056). The microbial interaction networks and indicator bacteria in different ecological compartments showed that most of the bacteria that played the role of key nodes (OTUs) in each ecological compartment were bacteria with high relative abundance in the compartment. However, the bacteria that played the role of key nodes (OTUs) in bulbs were not Proteobacteria with the highest relative abundance in the compartment, but Actinobacteria that were significantly enriched in the root endosphere and rhizosphere ecological compartments. In addition, interactions among bacteria were interrupted in the hydroponic system, and specific bacterial communities and interaction patterns in Chinese chives varied among growth conditions. Prediction of metabolic functions indicated that plant metabolic activity related to stress responses and induction of system resistance was greater in belowground ecological compartments.
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Affiliation(s)
- Nan Sun
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing, China
| | - Yuxin Wang
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing, China
- *Correspondence: Yuxin Wang
| | - Jianhua Chen
- Pingdingshan Academy of Agricultural Sciences, Pingdingshan, China
| | - Pingzhi Wang
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing, China
| | - Weitang Song
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing, China
| | - Peifang Ma
- Pingdingshan Academy of Agricultural Sciences, Pingdingshan, China
| | - Yabin Duan
- Pingdingshan Academy of Agricultural Sciences, Pingdingshan, China
| | - Ziyuan Jiao
- Pingdingshan Academy of Agricultural Sciences, Pingdingshan, China
| | - Yixiao Li
- Pingdingshan Academy of Agricultural Sciences, Pingdingshan, China
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Plant Growth-Promoting Activity of Pseudomonas aeruginosa FG106 and Its Ability to Act as a Biocontrol Agent against Potato, Tomato and Taro Pathogens. BIOLOGY 2022; 11:biology11010140. [PMID: 35053136 PMCID: PMC8773043 DOI: 10.3390/biology11010140] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 12/31/2021] [Accepted: 01/10/2022] [Indexed: 12/24/2022]
Abstract
P. aeruginosa strain FG106 was isolated from the rhizosphere of tomato plants and identified through morphological analysis, 16S rRNA gene sequencing, and whole-genome sequencing. In vitro and in vivo experiments demonstrated that this strain could control several pathogens on tomato, potato, taro, and strawberry. Volatile and non-volatile metabolites produced by the strain are known to adversely affect the tested pathogens. FG106 showed clear antagonism against Alternaria alternata, Botrytis cinerea, Clavibacter michiganensis subsp. michiganensis, Phytophthora colocasiae, P. infestans, Rhizoctonia solani, and Xanthomonas euvesicatoria pv. perforans. FG106 produced proteases and lipases while also inducing high phosphate solubilization, producing siderophores, ammonia, indole acetic acid (IAA), and hydrogen cyanide (HCN) and forming biofilms that promote plant growth and facilitate biocontrol. Genome mining approaches showed that this strain harbors genes related to biocontrol and growth promotion. These results suggest that this bacterial strain provides good protection against pathogens of several agriculturally important plants via direct and indirect modes of action and could thus be a valuable bio-control agent.
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Wang N, Li H, Wang B, Ding J, Liu Y, Wei Y, Li J, Ding GC. Taxonomic and Functional Diversity of Rhizosphere Microbiome Recruited From Compost Synergistically Determined by Plant Species and Compost. Front Microbiol 2022; 12:798476. [PMID: 35095808 PMCID: PMC8792965 DOI: 10.3389/fmicb.2021.798476] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 11/26/2021] [Indexed: 11/19/2022] Open
Abstract
Compost is frequently served as the first reservoir for plants to recruit rhizosphere microbiome when used as growing substrate in the seedling nursery. In the present study, recruitment of rhizosphere microbiome from two composts by tomato, pepper, or maize was addressed by shotgun metagenomics and 16S rRNA amplicon sequencing. The 16S rRNA amplicon sequencing analysis showed that 41% of variation in the rhizosphere bacterial community was explained by compost, in contrast to 23% by plant species. Proteobacterial genera were commonly recruited by all three plant species with specific selections for Ralstonia by tomato and Enterobacteria by maize. These findings were confirmed by analysis of 16S rRNA retrieved from the shotgun metagenomics library. Approximately 70% of functional gene clusters differed more than sevenfold in abundance between rhizosphere and compost. Functional groups associated with the sensing and up-taking of C3 and C4 carboxylic acids, amino acids, monosaccharide, production of antimicrobial substances, and antibiotic resistance were over-represented in the rhizosphere. In summary, compost and plant species synergistically shaped the composition of the rhizosphere microbiome and selected for functional traits associated with the competition on root exudates.
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Affiliation(s)
- Ning Wang
- Beijing Key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Science, China Agricultural University, Beijing, China
- Organic Recycling Institute (Suzhou) of China Agricultural University, Suzhou, China
| | - Huixiu Li
- Beijing Key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Science, China Agricultural University, Beijing, China
- Tangshan Normal University, Tangshan, China
| | - Bo Wang
- Beijing Key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Science, China Agricultural University, Beijing, China
| | - Jia Ding
- Beijing Key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Science, China Agricultural University, Beijing, China
- Organic Recycling Institute (Suzhou) of China Agricultural University, Suzhou, China
| | - Yingjie Liu
- Beijing Key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Science, China Agricultural University, Beijing, China
| | - Yuquan Wei
- Beijing Key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Science, China Agricultural University, Beijing, China
- Organic Recycling Institute (Suzhou) of China Agricultural University, Suzhou, China
| | - Ji Li
- Beijing Key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Science, China Agricultural University, Beijing, China
- Organic Recycling Institute (Suzhou) of China Agricultural University, Suzhou, China
| | - Guo-Chun Ding
- Beijing Key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Science, China Agricultural University, Beijing, China
- Organic Recycling Institute (Suzhou) of China Agricultural University, Suzhou, China
- *Correspondence: Guo-Chun Ding,
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Roca-Couso R, Flores-Félix JD, Rivas R. Mechanisms of Action of Microbial Biocontrol Agents against Botrytis cinerea. J Fungi (Basel) 2021; 7:1045. [PMID: 34947027 PMCID: PMC8707566 DOI: 10.3390/jof7121045] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 11/29/2021] [Accepted: 12/04/2021] [Indexed: 01/20/2023] Open
Abstract
Botrytis cinerea is a phytopathogenic fungus responsible for economic losses from USD 10 to 100 billion worldwide. It affects more than 1400 plant species, thus becoming one of the main threats to the agriculture systems. The application of fungicides has for years been an efficient way to control this disease. However, fungicides have negative environmental consequences that have changed popular opinion and clarified the need for more sustainable solutions. Biopesticides are products formulated based on microorganisms (bacteria or fungi) with antifungal activity through various mechanisms. This review gathers the most important mechanisms of antifungal activities and the microorganisms that possess them. Among the different modes of action, there are included the production of diffusible molecules, both antimicrobial molecules and siderophores; production of volatile organic compounds; production of hydrolytic enzymes; and other mechanisms, such as the competition and induction of systemic resistance, triggering an interaction at different levels and inhibition based on complex systems for the production of molecules and regulation of crop biology. Such a variety of mechanisms results in a powerful weapon against B. cinerea; some of them have been tested and are already used in the agricultural production with satisfactory results.
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Affiliation(s)
- Rocío Roca-Couso
- Department of Microbiology and Genetics, Edificio Departamental de Biología, University of Salamanca, 37007 Salamanca, Spain;
- Institute for Agribiotechnology Research (CIALE), 37185 Salamanca, Spain
| | - José David Flores-Félix
- CICS-UBI–Health Sciences Research Centre, University of Beira Interior, 6201-506 Covilhã, Portugal
| | - Raúl Rivas
- Department of Microbiology and Genetics, Edificio Departamental de Biología, University of Salamanca, 37007 Salamanca, Spain;
- Institute for Agribiotechnology Research (CIALE), 37185 Salamanca, Spain
- Associated Unit, University of Salamanca-CSIC (IRNASA), 37008 Salamanca, Spain
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The Glutamate Receptor Plays a Role in Defense against Botrytis cinerea through Electrical Signaling in Tomato. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app112311217] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Plant glutamate-like receptor genes (GLRs) are homologous to mammalian ionotropic glutamate receptors genes (iGluRs). Although GLRs have been implicated in plant defenses to biotic stress, the relationship between GLR-mediated plant immunity against fungal pathogens and electrical signals remains poorly understood. Here, we found that pretreatment with a GLR inhibitor, 6,7-dinitriquinoxaline-2,3-dione (DNQX), increased the susceptibility of tomato plants to the necrotrophic fungal pathogen Botrytis cinerea. Assessment of the glr3.3, glr3.5 and glr3.3/glr3.5 double-mutants upon B. cinerea infection showed that tomato GLR3.3 and GLR3.5 are essential for plant immunity against B. cinerea, wherein GLR3.3 plays the main role. Analysis of the membrane potential changes induced by glutamate (Glu) or glycine (Gly) revealed that amplitude was significantly reduced by knocking out GLR3.3 in tomato. While treatment with Glu or Gly significantly increased immunity against B. cinerea in wild-type plants, this effect was significantly attenuated in glr3.3 mutants. Thus, our data demonstrate that GLR3.3- and GLR3.5-mediated plant immunity against B. cinerea is associated with electrical signals in tomato plants.
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Yi Y, Shan Y, Liu S, Yang Y, Liu Y, Yin Y, Hou Z, Luan P, Li R. Antagonistic Strain Bacillus amyloliquefaciens XZ34-1 for Controlling Bipolaris sorokiniana and Promoting Growth in Wheat. Pathogens 2021; 10:pathogens10111526. [PMID: 34832680 PMCID: PMC8619621 DOI: 10.3390/pathogens10111526] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 11/19/2021] [Accepted: 11/19/2021] [Indexed: 11/20/2022] Open
Abstract
Common root rot, caused by Bipolaris sorokiniana, is one of the most prevalent diseases of wheat and has led to major declines in wheat yield and quality worldwide. Here, strain XZ34-1 was isolated from soil and identified as Bacillus amyloliquefaciens based on the morphological, physiological, biochemical characteristics and 16S rDNA sequence. Culture filtrate (CF) of strain XZ34-1 showed a high inhibition rate against B.sorokiniana and had a broad antifungal spectrum. It also remarkably inhibited the mycelial growth and spore germination of B. sorokiniana. In pot control experiments, the incidence and disease index of common root rot in wheat seedlings were decreased after treatment with CF, and the biological control efficacy was significant, up to 78.24%. Further studies showed XZ34-1 could produce antifungal bioactive substances and had the potential of promoting plant growth. Lipopeptide genes detection with PCR indicated that strain XZ34-1 may produce lipopeptides. Furthermore, activities of defense-related enzymes were enhanced in wheat seedlings after inoculation with B.sorokiniana and treatment with CF, which showed induced resistance could be produced in wheat to resist pathogens. These results reveal that strain XZ34-1 is a promising candidate for application as a biological control agent against B.sorokiniana.
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Affiliation(s)
- Yanjie Yi
- School of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China; (Y.S.); (S.L.); (Y.Y.); (Y.L.); (Y.Y.); (Z.H.); (P.L.)
- The Key Laboratory of Functional Molecules for Biomedical Research, Zhengzhou 450001, China
- Correspondence: (Y.Y.); (R.L.); Tel.: +86-371-67756513 (Y.Y. & R.L.)
| | - Youtian Shan
- School of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China; (Y.S.); (S.L.); (Y.Y.); (Y.L.); (Y.Y.); (Z.H.); (P.L.)
- The Key Laboratory of Functional Molecules for Biomedical Research, Zhengzhou 450001, China
| | - Shifei Liu
- School of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China; (Y.S.); (S.L.); (Y.Y.); (Y.L.); (Y.Y.); (Z.H.); (P.L.)
| | - Yanhui Yang
- School of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China; (Y.S.); (S.L.); (Y.Y.); (Y.L.); (Y.Y.); (Z.H.); (P.L.)
- The Key Laboratory of Functional Molecules for Biomedical Research, Zhengzhou 450001, China
| | - Yang Liu
- School of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China; (Y.S.); (S.L.); (Y.Y.); (Y.L.); (Y.Y.); (Z.H.); (P.L.)
- The Key Laboratory of Functional Molecules for Biomedical Research, Zhengzhou 450001, China
| | - Yanan Yin
- School of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China; (Y.S.); (S.L.); (Y.Y.); (Y.L.); (Y.Y.); (Z.H.); (P.L.)
- The Key Laboratory of Functional Molecules for Biomedical Research, Zhengzhou 450001, China
| | - Zhipeng Hou
- School of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China; (Y.S.); (S.L.); (Y.Y.); (Y.L.); (Y.Y.); (Z.H.); (P.L.)
- The Key Laboratory of Functional Molecules for Biomedical Research, Zhengzhou 450001, China
| | - Pengyu Luan
- School of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China; (Y.S.); (S.L.); (Y.Y.); (Y.L.); (Y.Y.); (Z.H.); (P.L.)
- The Key Laboratory of Functional Molecules for Biomedical Research, Zhengzhou 450001, China
| | - Ruifang Li
- School of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China; (Y.S.); (S.L.); (Y.Y.); (Y.L.); (Y.Y.); (Z.H.); (P.L.)
- The Key Laboratory of Functional Molecules for Biomedical Research, Zhengzhou 450001, China
- Correspondence: (Y.Y.); (R.L.); Tel.: +86-371-67756513 (Y.Y. & R.L.)
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Feng M, Lv Y, Li T, Li X, Liu J, Chen X, Zhang Y, Chen X, Wang A. Postharvest Treatments with Three Yeast Strains and Their Combinations to Control Botrytis cinerea of Snap Beans. Foods 2021; 10:foods10112736. [PMID: 34829022 PMCID: PMC8618400 DOI: 10.3390/foods10112736] [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: 10/18/2021] [Revised: 11/05/2021] [Accepted: 11/07/2021] [Indexed: 11/25/2022] Open
Abstract
Three yeast strains, namely Cryptococcus albidus (Ca63), Cryptococcus albidus (Ca64), and Candida parapsilosis (Yett1006), and their combinations, including single yeast agent, two combined yeast strains, single yeast agent + NaHCO3, single yeast agent + chitosan, single yeast agent + ascorbic acid, and single yeast agent + konjac powder, were evaluated for their activity against Botrytis cinerea, the most economically important fungal pathogens causing postharvest disease of snap beans. In in vitro tests, no inhibition zone was observed in dual cultures of three yeast strains and B. cinerea. The mycelial growth inhibition rates of B. cinerea for Ca63, Ca64, and Yett1006 were 97%, 95%, and 97%, respectively. In in vivo tests, the optimal combination of the lowest disease index of snap beans with B. cinerea was Ca63 + Ca64, with a preventing effect of 75%. The decay rate and rust spots index of Ca64 + ascorbic acid combination were 25% and 20%, respectively, which were the lowest. The activities of defense-related enzymes increased, while malondialdehyde (MDA) content was suppressed in snap beans after different treatments. Our results highlight the potential of the three yeast strains and their combinations as new nonpolluting agents for the integrated control of B. cinerea on snap beans.
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Affiliation(s)
- Mingfang Feng
- College of Life Sciences, Northeast Agricultural University, Harbin 150030, China; (M.F.); (Y.Z.)
| | - You Lv
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China; (Y.L.); (T.L.); (X.L.); (X.C.); (X.C.)
| | - Tiantian Li
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China; (Y.L.); (T.L.); (X.L.); (X.C.); (X.C.)
| | - Xinmao Li
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China; (Y.L.); (T.L.); (X.L.); (X.C.); (X.C.)
| | - Jiayin Liu
- College of Sciences, Northeast Agricultural University, Harbin 150030, China;
| | - Xiuling Chen
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China; (Y.L.); (T.L.); (X.L.); (X.C.); (X.C.)
| | - Yao Zhang
- College of Life Sciences, Northeast Agricultural University, Harbin 150030, China; (M.F.); (Y.Z.)
| | - Xu Chen
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China; (Y.L.); (T.L.); (X.L.); (X.C.); (X.C.)
| | - Aoxue Wang
- College of Life Sciences, Northeast Agricultural University, Harbin 150030, China; (M.F.); (Y.Z.)
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China; (Y.L.); (T.L.); (X.L.); (X.C.); (X.C.)
- Correspondence: ; Tel.: +86-451-55190443
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Jiang M, Xu X, Song J, Li D, Han L, Sun X, Guo L, Xiang W, Zhao J, Wang X. Streptomyces botrytidirepellens sp. nov., a novel actinomycete with antifungal activity against Botrytis cinerea. Int J Syst Evol Microbiol 2021; 71. [PMID: 34520340 DOI: 10.1099/ijsem.0.005004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The fungal pathogen Botrytis cinerea is the causal agent of devastating gray mold diseases in many economically important fruits, vegetables, and flowers, leading to serious economic losses worldwide. In this study, a novel actinomycete NEAU-LD23T exhibiting antifungal activity against B. cinerea was isolated, and its taxonomic position was evaluated using a polyphasic approach. Based on the genotypic, phenotypic and chemotaxonomic data, it is concluded that the strain represents a novel species within the genus Streptomyces, for which the name Streptomyces botrytidirepellens sp. nov. is proposed. The type strain is NEAU-LD23T (=CCTCC AA 2019029T=DSM 109824T). In addition, strain NEAU-LD23T showed a strong antagonistic effect against B. cinerea (82.6±2.5%) and varying degrees of inhibition on nine other phytopathogenic fungi. Both cell-free filtrate and methanol extract of mycelia of strain NEAU-LD23T significantly inhibited mycelial growth of B. cinerea. To preliminarily explore the antifungal mechanisms, the genome of strain NEAU-LD23T was sequenced and analyzed. AntiSMASH analysis led to the identification of several gene clusters responsible for the biosynthesis of bioactive secondary metabolites with antifungal activity, including 9-methylstreptimidone, echosides, anisomycin, coelichelin and desferrioxamine B. Overall, this research provided us an excellent strain with considerable potential to use for biological control of tomato gray mold.
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Affiliation(s)
- Mengqi Jiang
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Xiangfang, Harbin 150030, PR China
| | - Xi Xu
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Xiangfang, Harbin 150030, PR China
| | - Jia Song
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Xiangfang, Harbin 150030, PR China
| | - Dongmei Li
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Xiangfang, Harbin 150030, PR China
| | - Liyuan Han
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Xiangfang, Harbin 150030, PR China
| | - Xiujun Sun
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Xiangfang, Harbin 150030, PR China
| | - Lifeng Guo
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Xiangfang, Harbin 150030, PR China
| | - Wensheng Xiang
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Xiangfang, Harbin 150030, PR China.,State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, PR China
| | - Junwei Zhao
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Xiangfang, Harbin 150030, PR China
| | - Xiangjing Wang
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Xiangfang, Harbin 150030, PR China
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