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Zhang Y, Cao X, Liu Q, Chen Y, Wang Y, Cong H, Li C, Li Y, Wang Y, Jiang J, Li L. Multi-omics analysis of Streptomyces djakartensis strain MEPS155 reveal a molecular response strategy combating Ceratocystis fimbriata causing sweet potato black rot. Food Microbiol 2024; 122:104557. [PMID: 38839221 DOI: 10.1016/j.fm.2024.104557] [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: 01/26/2024] [Revised: 04/19/2024] [Accepted: 04/28/2024] [Indexed: 06/07/2024]
Abstract
To investigate the potential antifungal mechanisms of rhizosphere Actinobacteria against Ceratocystis fimbriata in sweet potato, a comprehensive approach combining biochemical analyses and multi-omics techniques was employed in this study. A total of 163 bacterial strains were isolated from the rhizosphere soil of sweet potato. Among them, strain MEPS155, identified as Streptomyces djakartensis, exhibited robust and consistent inhibition of C. fimbriata mycelial growth in in vitro dual culture assays, attributed to both cell-free supernatant and volatile organic compounds. Moreover, strain MEPS155 demonstrated diverse plant growth-promoting attributes, including the production of indole-3-acetic acid, 1-aminocyclopropane-1-carboxylate deaminase, phosphorus solubilization, nitrogen fixation, and enzymatic activities such as cellulase, chitinase, and protease. Notably, strain MEPS155 exhibited efficacy against various sweet potato pathogenic fungi. Following the inoculation of strain MEPS155, a significant reduction (P < 0.05) in malondialdehyde content was observed in sweet potato slices, indicating a potential protective effect. The whole genome of MEPS155 was characterized by a size of 8,030,375 bp, encompassing 7234 coding DNA sequences and 32 secondary metabolite biosynthetic gene clusters. Transcriptomic analysis revealed 1869 differentially expressed genes in the treated group that cultured with C. fimbriata, notably influencing pathways associated with porphyrin metabolism, fatty acid biosynthesis, and biosynthesis of type II polyketide products. These alterations in gene expression are hypothesized to be linked to the production of secondary metabolites contributing to the inhibition of C. fimbriata. Metabolomic analysis identified 1469 potential differently accumulated metabolites (PDAMs) when comparing MEPS155 and the control group. The up-regulated PDAMs were predominantly associated with the biosynthesis of various secondary metabolites, including vanillin, myristic acid, and protocatechuic acid, suggesting potential inhibitory effects on plant pathogenic fungi. Our study underscores the ability of strain S. djakartensis MEPS155 to inhibit C. fimbriata growth through the production of secretory enzymes or secondary metabolites. The findings contribute to a theoretical foundation for future investigations into the role of MEPS155 in postharvest black rot prevention in sweet potato.
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Affiliation(s)
- Yongjing Zhang
- The Key Laboratory of Biotechnology for Medicinal and Edible Plant Resources of Jiangsu Province, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu Province, 221116, China
| | - Xiaoying Cao
- The Key Laboratory of Biotechnology for Medicinal and Edible Plant Resources of Jiangsu Province, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu Province, 221116, China
| | - Qiao Liu
- The Key Laboratory of Biotechnology for Medicinal and Edible Plant Resources of Jiangsu Province, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu Province, 221116, China
| | - Yujie Chen
- The Key Laboratory of Biotechnology for Medicinal and Edible Plant Resources of Jiangsu Province, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu Province, 221116, China
| | - Yiming Wang
- The Key Laboratory of Biotechnology for Medicinal and Edible Plant Resources of Jiangsu Province, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu Province, 221116, China
| | - Hao Cong
- The Key Laboratory of Biotechnology for Medicinal and Edible Plant Resources of Jiangsu Province, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu Province, 221116, China
| | - Changgen Li
- The Key Laboratory of Biotechnology for Medicinal and Edible Plant Resources of Jiangsu Province, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu Province, 221116, China
| | - Yanting Li
- The Key Laboratory of Biotechnology for Medicinal and Edible Plant Resources of Jiangsu Province, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu Province, 221116, China
| | - Yixuan Wang
- The Key Laboratory of Biotechnology for Medicinal and Edible Plant Resources of Jiangsu Province, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu Province, 221116, China
| | - Jihong Jiang
- The Key Laboratory of Biotechnology for Medicinal and Edible Plant Resources of Jiangsu Province, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu Province, 221116, China.
| | - Ludan Li
- The Key Laboratory of Biotechnology for Medicinal and Edible Plant Resources of Jiangsu Province, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu Province, 221116, China.
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de Souza Rodrigues R, de Souza AQL, Feitoza MDO, Alves TCL, Barbosa AN, da Silva Santiago SRS, de Souza ADL. Biotechnological potential of actinomycetes in the 21st century: a brief review. Antonie Van Leeuwenhoek 2024; 117:82. [PMID: 38789815 DOI: 10.1007/s10482-024-01964-y] [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: 08/31/2023] [Accepted: 04/07/2024] [Indexed: 05/26/2024]
Abstract
This brief review aims to draw attention to the biotechnological potential of actinomycetes. Their main uses as sources of antibiotics and in agriculture would be enough not to neglect them; however, as we will see, their biotechnological application is much broader. Far from intending to exhaust this issue, we present a short survey of the research involving actinomycetes and their applications published in the last 23 years. We highlight a perspective for the discovery of new active ingredients or new applications for the known metabolites of these microorganisms that, for approximately 80 years, since the discovery of streptomycin, have been the main source of antibiotics. Based on the collected data, we organize the text to show how the cosmopolitanism of actinomycetes and the evolutionary biotic and abiotic ecological relationships of actinomycetes translate into the expression of metabolites in the environment and the richness of biosynthetic gene clusters, many of which remain silenced in traditional laboratory cultures. We also present the main strategies used in the twenty-first century to promote the expression of these silenced genes and obtain new secondary metabolites from known or new strains. Many of these metabolites have biological activities relevant to medicine, agriculture, and biotechnology industries, including candidates for new drugs or drug models against infectious and non-infectious diseases. Below, we present significant examples of the antimicrobial spectrum of actinomycetes, which is the most commonly investigated and best known, as well as their non-antimicrobial spectrum, which is becoming better known and increasingly explored.
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Affiliation(s)
- Rafael de Souza Rodrigues
- Programa de Pós-Graduação em Biodiversidade e Biotecnologia, Universidade Federal do Amazonas, Manaus, Amazonas, Brazil.
- Central Analítica, Centro de Apoio Multidisciplinar, Universidade Federal do Amazonas, Av. General Rodrigo Octavio Jordão Ramos, 6200, Coroado I, Manaus, Amazonas, CEP 69.077-000, Brazil.
| | - Antonia Queiroz Lima de Souza
- Programa de Pós-Graduação em Biodiversidade e Biotecnologia, Universidade Federal do Amazonas, Manaus, Amazonas, Brazil
- Central Analítica, Centro de Apoio Multidisciplinar, Universidade Federal do Amazonas, Av. General Rodrigo Octavio Jordão Ramos, 6200, Coroado I, Manaus, Amazonas, CEP 69.077-000, Brazil
- Faculdade de Ciências Agrárias, Universidade Federal do Amazonas, Manaus, Amazonas, Brazil
| | | | | | - Anderson Nogueira Barbosa
- Central Analítica, Centro de Apoio Multidisciplinar, Universidade Federal do Amazonas, Av. General Rodrigo Octavio Jordão Ramos, 6200, Coroado I, Manaus, Amazonas, CEP 69.077-000, Brazil
| | - Sarah Raquel Silveira da Silva Santiago
- Central Analítica, Centro de Apoio Multidisciplinar, Universidade Federal do Amazonas, Av. General Rodrigo Octavio Jordão Ramos, 6200, Coroado I, Manaus, Amazonas, CEP 69.077-000, Brazil
| | - Afonso Duarte Leão de Souza
- Programa de Pós-Graduação em Biodiversidade e Biotecnologia, Universidade Federal do Amazonas, Manaus, Amazonas, Brazil
- Central Analítica, Centro de Apoio Multidisciplinar, Universidade Federal do Amazonas, Av. General Rodrigo Octavio Jordão Ramos, 6200, Coroado I, Manaus, Amazonas, CEP 69.077-000, Brazil
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal do Amazonas, Manaus, Amazonas, Brazil
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Kaur T, Khanna K, Sharma S, Manhas RK. Mechanistic insights into the role of actinobacteria as potential biocontrol candidates against fungal phytopathogens. J Basic Microbiol 2023; 63:1196-1218. [PMID: 37208796 DOI: 10.1002/jobm.202300027] [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: 01/18/2023] [Revised: 03/26/2023] [Accepted: 04/29/2023] [Indexed: 05/21/2023]
Abstract
Worldwide mounting demand for better food production to nurture exasperating population emphasizes on reduced crop losses. The incidence of pathogens into the agricultural fields has tend to dwindle plethora of cereal, vegetable, and other fodder crops. This, in turn, has seriously impacted the economic losses on global scale. Apart from this, it is quite challenging to feed the posterity in the coming decades. To counteract this problem, various agrochemicals have been commercialized in the market that no doubt shows positive results but along with adversely affecting the ecosystem. Therefore, the excessive ill-fated use of agrochemicals to combat the plant pests and diseases highlights that alternatives to chemical pesticides are need of the hour. In recent days, management of plant diseases using plant-beneficial microbes is gaining interest as safer and potent alternatives to replace chemically based pesticides. Among these beneficial microbes, actinobacteria especially streptomycetes play considerable role in combating plant diseases along with promoting the plant growth and development along with their productivity and yield. The mechanisms exhibited by actinobacteria include antibiosis (antimicrobial compounds and hydrolytic enzymes), mycoparasitism, nutrient competition, and induction of resistance in plants. Thus, in cognizance with potential of actinobacteria as potent biocontrol agents, this review summarizes role of actinobacteria and the multifarious mechanisms exhibited by actinobacteria for commercial applications.
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Affiliation(s)
- Talwinder Kaur
- Department of Microbiology, DAV University, Jalandhar, Punjab, India
- Department of Microbiology, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Kanika Khanna
- Department of Microbiology, DAV University, Jalandhar, Punjab, India
| | - Sonika Sharma
- Faculty of Agricultural Sciences, Jalandhar, Punjab, India
| | - Rajesh K Manhas
- Department of Microbiology, Guru Nanak Dev University, Amritsar, Punjab, India
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Tang H, Chen X, Chen M, Li X, Jiang J, Tuo L, Li F. Phycicoccus sonneraticus sp. nov., a Novel Endophytic Actinobacterium Isolated from the Bark of Sonneratia apetala. Curr Microbiol 2023; 80:393. [PMID: 37897506 DOI: 10.1007/s00284-023-03511-w] [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: 04/27/2023] [Accepted: 10/03/2023] [Indexed: 10/30/2023]
Abstract
A novel endophytic actinobacterial strain, designated MQZ13P-5T, was isolated from a piece of bark of Sonneratia apetala, collected from Guangxi Zhuang Autonomous Region, China. This strain was Gram-stain positive, aerobic, non-spore-forming, non-motile and rod-shaped. Comparative 16S rRNA gene sequence analysis showed that strain MQZ13P-5T was related to the genus Phycicoccus with exhibiting the highest similarity (98.0%) to Phycicoccus endophyticus IP6SC6T. The phylogenetic trees based on 16S rRNA gene sequences and core genes indicated that strain MQZ13P-5T belonged to the genus Phycicoccus and could not be assigned to any described species. The average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH) values between strain MQZ13P-5T and type strains of Phycicoccus species were less than 84% and 27%, respectively, below the thresholds for species delineation. This strain showed chemotaxonomic and phenotypic properties consistent with its classification in the genus Phycicoccus. Based on the taxonomic data, strain MQZ13P-5T should represent a novel species of the genus Phycicoccus, for which the name Phycicoccus sonneraticus sp. nov. is proposed, with the type strain MQZ13P-5T (= CGMCC 1.18744T = JCM 34337T).
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Affiliation(s)
- Huiling Tang
- Department of Scientific Research Office, Jiangsu Food & Pharmaceutical Science College, Huai'an, 223003, China
| | - Xiaohui Chen
- School of Basic Medical Sciences, Zunyi Medical University, Zunyi, 563006, China
| | - Mingsheng Chen
- School of Basic Medical Sciences, Zunyi Medical University, Zunyi, 563006, China
| | - Xiaohong Li
- School of Basic Medical Sciences, Zunyi Medical University, Zunyi, 563006, China
| | - Jianjing Jiang
- School of Basic Medical Sciences, Zunyi Medical University, Zunyi, 563006, China
| | - Li Tuo
- School of Basic Medical Sciences, Zunyi Medical University, Zunyi, 563006, China.
| | - Feina Li
- Laboratory of Respiratory Diseases, Beijing Key Laboratory of Pediatric Respiratory Infection Diseases, Beijing Children's Hospital, Key Laboratory of Major Diseases in Children, Ministry of Education, National Clinical Research Center for Respiratory Diseases, Beijing Pediatric Research Institute, Capital Medical University, National Center for Children's Health, Beijing, 100045, China.
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Ngamcharungchit C, Chaimusik N, Panbangred W, Euanorasetr J, Intra B. Bioactive Metabolites from Terrestrial and Marine Actinomycetes. Molecules 2023; 28:5915. [PMID: 37570885 PMCID: PMC10421486 DOI: 10.3390/molecules28155915] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/27/2023] [Accepted: 08/01/2023] [Indexed: 08/13/2023] Open
Abstract
Actinomycetes inhabit both terrestrial and marine ecosystems and are highly proficient in producing a wide range of natural products with diverse biological functions, including antitumor, immunosuppressive, antimicrobial, and antiviral activities. In this review, we delve into the life cycle, ecology, taxonomy, and classification of actinomycetes, as well as their varied bioactive metabolites recently discovered between 2015 and 2023. Additionally, we explore promising strategies to unveil and investigate new bioactive metabolites, encompassing genome mining, activation of silent genes through signal molecules, and co-cultivation approaches. By presenting this comprehensive and up-to-date review, we hope to offer a potential solution to uncover novel bioactive compounds with essential activities.
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Affiliation(s)
- Chananan Ngamcharungchit
- Department of Biotechnology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
- Mahidol University and Osaka University Collaborative Research Center on Bioscience and Biotechnology, Bangkok 10400, Thailand
| | - Nutsuda Chaimusik
- Department of Biotechnology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
- Mahidol University and Osaka University Collaborative Research Center on Bioscience and Biotechnology, Bangkok 10400, Thailand
| | - Watanalai Panbangred
- Research, Innovation and Partnerships Office, King Mongkut’s University of Technology Thonburi, Bangkok 10140, Thailand
| | - Jirayut Euanorasetr
- Department of Microbiology, Faculty of Science, King Mongkut’s University of Technology Thonburi, Bangkok 10140, Thailand
- Laboratory of Biotechnological Research for Energy and Bioactive Compounds, Department of Microbiology, Faculty of Science, King Mongkut’s University of Technology Thonburi, Khet Thung Khru, Bangkok 10140, Thailand
| | - Bungonsiri Intra
- Department of Biotechnology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
- Mahidol University and Osaka University Collaborative Research Center on Bioscience and Biotechnology, Bangkok 10400, Thailand
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Torres-Rodriguez JA, Reyes-Pérez JJ, Quiñones-Aguilar EE, Hernandez-Montiel LG. Actinomycete Potential as Biocontrol Agent of Phytopathogenic Fungi: Mechanisms, Source, and Applications. PLANTS (BASEL, SWITZERLAND) 2022; 11:3201. [PMID: 36501241 PMCID: PMC9736024 DOI: 10.3390/plants11233201] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/09/2022] [Accepted: 11/17/2022] [Indexed: 06/17/2023]
Abstract
Synthetic fungicides have been the main control of phytopathogenic fungi. However, they cause harm to humans, animals, and the environment, as well as generating resistance in phytopathogenic fungi. In the last few decades, the use of microorganisms as biocontrol agents of phytopathogenic fungi has been an alternative to synthetic fungicide application. Actinomycetes isolated from terrestrial, marine, wetland, saline, and endophyte environments have been used for phytopathogenic fungus biocontrol. At present, there is a need for searching new secondary compounds and metabolites of different isolation sources of actinomycetes; however, little information is available on those isolated from other environments as biocontrol agents in agriculture. Therefore, the objective of this review is to compare the antifungal activity and the main mechanisms of action in actinomycetes isolated from different environments and to describe recent achievements of their application in agriculture. Although actinomycetes have potential as biocontrol agents of phytopathogenic fungi, few studies of actinomycetes are available of those from marine, saline, and wetland environments, which have equal or greater potential as biocontrol agents than isolates of actinomycetes from terrestrial environments.
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Affiliation(s)
- Juan A. Torres-Rodriguez
- Nanotechnology and Microbial Biocontrol Group, Centro de Investigaciones Biológicas del Noroeste, Av. Politécnico Nacional 195, Col. Playa Palo de Santa Rita Sur, La Paz 23090, Mexico
| | - Juan J. Reyes-Pérez
- Facultad de Ciencias Pecuarias, Universidad Técnica Estatal de Quevedo, Av. Quito km 1.5 vía a Santo Domingo, Quevedo 120501, Ecuador
| | - Evangelina E. Quiñones-Aguilar
- Centro de Investigaciones y Asistencia en Tecnología y Diseño del Estado de Jalisco, Camino Arenero, El Bajío del Arenal, Guadalajara 45019, Mexico
| | - Luis G. Hernandez-Montiel
- Nanotechnology and Microbial Biocontrol Group, Centro de Investigaciones Biológicas del Noroeste, Av. Politécnico Nacional 195, Col. Playa Palo de Santa Rita Sur, La Paz 23090, Mexico
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Shimizu M, Naznin HA, Hieno A. The Significance of Mycoparasitism by Streptomyces sp. MBCN152-1 for Its Biocontrol Activity against Alternaria brassicicola. Microbes Environ 2022; 37. [PMID: 36104185 PMCID: PMC9530718 DOI: 10.1264/jsme2.me22048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Streptomyces sp. strain MBCN152-1, isolated from cabbage, has potential as a biocontrol agent for Alternaria brassicicola on cabbage seedlings. The present study examined its mode of action. Light microscopy showed that appressorium formation by A. brassicicola was significantly suppressed on cabbage seedlings bacterized with MBCN152-1. Furthermore, scanning electron microscopy revealed that the mycelia of MBCN152-1, which were epiphytically growing on the cotyledon leaves of cabbage seedlings, intensively coiled around the germinating conidia of A. brassicicola. In vitro co-culture experiments demonstrated that MBCN152-1 is an aggressive mycoparasite of A. brassicicola, but not of A. brassicae or Colletotrichum higginsianum. Biocontrol experiments indicated that MBCN152-1 did not control diseases caused by A. brassicae or C. higginsianum. These results suggest that mycoparasitism is the primary mode of action for MBCN152-1. This is the first study to clearly demonstrate the significance of mycoparasitism in the biocontrol efficacy of endophytic Streptomyces.
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Affiliation(s)
- Masafumi Shimizu
- Laboratory of Plant Pathology, Faculty of Applied Biological Sciences, Gifu University
| | - Hushna Ara Naznin
- Laboratory of Plant Pathology, Faculty of Applied Biological Sciences, Gifu University
| | - Ayaka Hieno
- River Basin Research Center, Gifu University
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Kong WL, Wang YH, Lu LX, Li PS, Zhang Y, Wu XQ. Rahnella aquatilis JZ-GX1 alleviates iron deficiency chlorosis in Cinnamomum camphora by secreting desferrioxamine and reshaping the soil fungal community. FRONTIERS IN PLANT SCIENCE 2022; 13:960750. [PMID: 36186024 PMCID: PMC9520127 DOI: 10.3389/fpls.2022.960750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 08/19/2022] [Indexed: 06/16/2023]
Abstract
Plant growth-promoting rhizobacteria are important for improving plant iron nutrition, but the interactions among inoculants, host plants and soil microorganisms have not been greatly explored. Rahnella aquatilis JZ-GX1 was applied to treat the increasingly serious iron deficiency chlorosis in Cinnamomum camphora, and the resulting improvement in chlorosis was determined by assessing the contents of chlorophyll, active iron, Fe2+ and antioxidant enzymes in leaves, the effects on the soil microbial community and the metabolism in the rhizosphere by high-throughput sequencing techniques and liquid chromatography-mass spectrometry (LC-MS). The results showed that inoculation with JZ-GX1 significantly increased the chlorophyll content of C. camphora, which promoted the redistribution of active iron in roots and leaves, increased the activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) and ascorbate peroxidase (APX), and thus reduced membrane damage in iron-deficient C. camphora caused by reactive oxygen species. According to genome prediction and ultra-performance liquid chromatography-mass spectrometry (UPLC-MS) analysis, the JZ-GX1 strain could secrete desferrioxamine (DFO), and the concentration of DFO in C. camphora rhizosphere was 21-fold higher than that in uninoculated soil. The exogenous application of DFO increased the SPAD and Fe2+ contents in leaves. In addition, the inoculant affected the fungal community structure and composition in the C. camphora rhizosphere soil and increased the abundances of specific taxa, such as Glomus, Mortierella, Trichoderma, and Penicillium. Therefore, R. aquatilis JZ-GX1 application promoted iron absorption in C. camphora trees by secreting DFO and alleviated iron deficiency chlorosis through interactions with the local fungal community.
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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, Jiangsu, China
- Jiangsu Key Laboratory for Prevention and Management of Invasive Species, Nanjing Forestry University, Nanjing, Jiangsu, China
| | - Ya-Hui Wang
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, Jiangsu, China
- Jiangsu Key Laboratory for Prevention and Management of Invasive Species, Nanjing Forestry University, Nanjing, Jiangsu, China
| | - Lan-Xiang Lu
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, Jiangsu, China
- Jiangsu Key Laboratory for Prevention and Management of Invasive Species, Nanjing Forestry University, Nanjing, Jiangsu, China
| | - Pu-Sheng Li
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, Jiangsu, China
- Jiangsu Key Laboratory for Prevention and Management of Invasive Species, Nanjing Forestry University, Nanjing, Jiangsu, China
| | - Yu Zhang
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, Jiangsu, China
- Jiangsu Key Laboratory for Prevention and Management of Invasive Species, Nanjing Forestry University, Nanjing, Jiangsu, China
| | - Xiao-Qin Wu
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, Jiangsu, China
- Jiangsu Key Laboratory for Prevention and Management of Invasive Species, Nanjing Forestry University, Nanjing, Jiangsu, China
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Ebrahimi-Zarandi M, Saberi Riseh R, Tarkka MT. Actinobacteria as Effective Biocontrol Agents against Plant Pathogens, an Overview on Their Role in Eliciting Plant Defense. Microorganisms 2022; 10:microorganisms10091739. [PMID: 36144341 PMCID: PMC9500821 DOI: 10.3390/microorganisms10091739] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/18/2022] [Accepted: 08/25/2022] [Indexed: 01/02/2023] Open
Abstract
Pathogen suppression and induced systemic resistance are suitable alternative biocontrol strategies for integrated plant disease management and potentially comprise a sustainable alternative to agrochemicals. The use of Actinobacteria as biocontrol agents is accepted in practical sustainable agriculture, and a short overview on the plant-beneficial members of this phylum and recent updates on their biocontrol efficacies are the two topics of this review. Actinobacteria include a large portion of microbial rhizosphere communities and colonizers of plant tissues that not only produce pest-antagonistic secondary metabolites and enzymes but also stimulate plant growth. Non-pathogenic Actinobacteria can also induce systemic resistance against pathogens, but the mechanisms are still poorly described. In the absence of a pathogen, a mild defense response is elicited under jasmonic acid and salicylic acid signaling that involves pathogenesis-related proteins and secondary plant metabolites. Priming response partly includes the same compounds as the response to a sole actinobacterium, and the additional involvement of ethylene signaling has been suggested. Recent amplicon sequencing studies on bacterial communities suggest that future work may reveal how biocontrol active strains of Actinobacteria can be enriched in plant rhizosphere.
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Affiliation(s)
- Marzieh Ebrahimi-Zarandi
- Department of Plant Protection, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman 7618411764, Iran
| | - Roohallah Saberi Riseh
- Department of Plant Protection, Faculty of Agriculture, Vali-e-Asr University of Rafsanjan, Imam Khomeini Square, Rafsanjan 7718897111, Iran
- Correspondence: (R.S.R.); (M.T.T.)
| | - Mika T. Tarkka
- UFZ—Helmholtz Centre for Environmental Research, Department of Soil Ecology, Theodor-Lieser-Str. 4, 06120 Halle (Saale), Germany
- German Centre for Integrative Biodiversity Research (iDiv), Halle-Jena-Leipzig Puschstrasse 4, 04103 Leipzig, Germany
- Correspondence: (R.S.R.); (M.T.T.)
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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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Zhou L, Wang J, Wu F, Yin C, Kim KH, Zhang Y. Termite Nest Associated Bacillus siamensis YC-9 Mediated Biocontrol of Fusarium oxysporum f. sp. cucumerinum. Front Microbiol 2022; 13:893393. [PMID: 35722323 PMCID: PMC9198579 DOI: 10.3389/fmicb.2022.893393] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 05/06/2022] [Indexed: 12/16/2022] Open
Abstract
The antagonistic potential of bacteria obtained from the nest of Odontotermes formosanus was assessed against Fusarium oxysporum f. sp. cucumerinum (FOC). Of 30, seven termite nest-associated bacteria strains had biocontrol potential. Among them, the strain YC-9 showed the strongest antifungal activity toward FOC. Phylogenetic analysis of the 16S rRNA amplified product of YC-9 revealed its identification as Bacillus siamensis. The in vivo antifungal activity experiment showed that the application of YC-9 at 108 cfu/ml significantly reduced the cucumber wilt incidence with a control efficacy of 73.2%. Furthermore, plant growth parameters such as fresh weight, dry weight, plant height, and root height were significantly improved by 42.6, 53.0, 20.8, and 19.3%, respectively. We found that inoculation with B. siamensis YC-9 significantly increased the activity of defensive enzymes such as peroxidase (POD), polyphenol oxidase (PPO), and phenylalanine ammonia-lyase (PAL) in diseased cucumber roots, thereby raising the resistance. PCR using gene-specific primers revealed that B. siamensis YC-9 contains biosynthetic genes for known antibiotics, including bacillomycin, iturin, and surfactin. Chemical analysis of the cultivation of B. siamensis YC-9 resulted in the isolation of five metabolites, including hexadecanoic acid (1), cyclo-(L-phenylalanylglycine) (2), cyclo-(L-trans-Hyp-L-Leu) (3), C15-surfactin (4), and macrolactin A (5), the structures of which were identified by the analysis of NMR spectroscopic data and MS. Among them, the compound 4 showed significant antifungal activity against conidial germination of FOC with an IC50 value of 5.1 μg/ml, which was comparable to that of the positive control, cycloheximide (IC50 value of 2.6 μg/ml). Based on these findings, this study suggests that termite-nest associated B. siamensis YC-9 could be a potential biological control agent for integrated control of soil-borne diseases like cucumber Fusarium wilt.
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Affiliation(s)
- Lingfeng Zhou
- College of Life Sciences, Anhui Agricultural University, Hefei, China
| | - Junyong Wang
- College of Life Sciences, Anhui Agricultural University, Hefei, China
| | - Fei Wu
- College of Life Sciences, Anhui Agricultural University, Hefei, China
| | - Caiping Yin
- College of Life Sciences, Anhui Agricultural University, Hefei, China
| | - Ki Hyun Kim
- School of Pharmacy, Sungkyunkwan University, Suwon, South Korea
| | - Yinglao Zhang
- College of Life Sciences, Anhui Agricultural University, Hefei, China
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12
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Pang Z, Mao X, Xia Y, Xiao J, Wang X, Xu P, Liu G. Multiomics Reveals the Effect of Root Rot on Polygonati Rhizome and Identifies Pathogens and Biocontrol Strain. Microbiol Spectr 2022; 10:e0238521. [PMID: 35225655 PMCID: PMC9045327 DOI: 10.1128/spectrum.02385-21] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 02/10/2022] [Indexed: 01/19/2023] Open
Abstract
Root (rhizome) rot of Polygonatum plants has received substantial attention because it threatens yield and sustainable utilization in the polygonati rhizome industry. However, the potential pathogens that cause rhizome rot as well as the direct and indirect (via root-associated microbes) strategies by which Polygonatum defends against pathogens remain largely unknown. Herein, we used integrated multiomics of plant-targeted metabolomics and transcriptomics, microbiome, and culture-based methods to systematically investigate the interactions between the Polygonatum cyrtonema Hua root-associated microbiota and pathogens. We found that root rot inhibited P. cyrtonema rhizome growth and that the fresh weight significantly decreased (P < 0.001). The transcriptomic and metabonomic results showed that the expression of differentially expressed genes (DEGs) related to specialized metabolic and systemic resistance pathways, such as glycolysis/gluconeogenesis and flavonoid biosynthesis, cycloartenol synthase activity (related to saponin synthesis), mitogen-activated protein kinase (MAPK) signaling, and plant hormone signal transduction, was particularly increased in diseased rhizomes. Consistently, the contents of lactose, d-fructose, sarsasapogenin, asperulosidic acid, botulin, myricadoil, and other saponins, which are functional medicinal compounds present in P. cyrtonema rhizomes, were also increased in diseased plants infected with rhizome rot. The microbiome sequencing and culture results showed that root rot disrupted the P. cyrtonema bacterial and fungal communities and reduced the microbial diversity in the rhizomes and rhizosphere soil. We further found that a clear enrichment of Streptomyces violascens XTBG45 (HJB-XTBG45) in the healthy rhizosphere could control the root rot caused by Fusarium oxysporum and Colletotrichum spaethianum. Taken together, our results indicate that P. cyrtonema can modulate the plant immune system and metabolic processes and enrich beneficial root microbiota to defend against pathogens. IMPORTANCE Root (rhizome or tuber) reproduction is the main method for the agricultural cultivation of many important cash crops, and infected crop plants rot, exhibit retarded growth, and experience yield losses. While many studies have investigated medicinal plants and their functional medicinal compounds, the occurrence of root (rhizome) rot of plant and soil microbiota has received little attention. Therefore, we used integrated multiomics and culture-based methods to systematically study rhizome rot on the famous Chinese medicine Polygonatum cyrtonema and identify pathogens and beneficial microbiota of rhizome rot. Rhizome rot disrupted the Polygonatum-associated microbiota and reduced microbial diversity, and rhizome transcription and metabolic processes significantly changed. Our work provides evidence that rhizome rot not only changes rhizome transcription and functional metabolite contents but also impacts the microbial community diversity, assembly, and function of the rhizome and rhizosphere. This study provides a new friendly strategy for medicinal plant breeding and agricultural utilization.
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Affiliation(s)
- Zhiqiang Pang
- Crops Conservation and Breeding Base, CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
- The Innovative Academy of Seed Design, Chinese Academy of Sciences, Menglun, China
| | - Xinyu Mao
- Crops Conservation and Breeding Base, CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Yong Xia
- Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China
| | - Jinxian Xiao
- School of Biological and Chemical Science, Pu’er University, Puer, China
| | - Xiaoning Wang
- Key Laboratory for Crop Breeding of Hainan Province, Haikou, China
- Sanya Institute, Hainan Academy of Agricultural Sciences, Sanya, China
| | - Peng Xu
- Crops Conservation and Breeding Base, CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
- The Innovative Academy of Seed Design, Chinese Academy of Sciences, Menglun, China
| | - Guizhou Liu
- Crops Conservation and Breeding Base, CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, China
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Shalaby TA, Taha NA, Rakha MT, El-Beltagi HS, Shehata WF, Ramadan KMA, El-Ramady H, Bayoumi YA. Can Grafting Manage Fusarium Wilt Disease of Cucumber and Increase Productivity under Heat Stress? PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11091147. [PMID: 35567148 PMCID: PMC9106052 DOI: 10.3390/plants11091147] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 04/18/2022] [Accepted: 04/21/2022] [Indexed: 05/03/2023]
Abstract
Cucumber production is considered a crucial problem under biotic and abiotic stress, particularly in arid and semi-arid zones. The current study investigated the impact of grafted cucumber plants on five cucurbit rootstocks under infection with Fusarium oxysporum f. sp. cucumerinum alone and in combination with heat stress in two different locations (i.e., Kafr El-Sheikh and Sidi Salem) during the year of 2021. The rootstock of VSS-61 F1 displayed the highest level of resistance with values 20.8 and 16.6% for wilt incidence and 79.2 and 83.4% for the wilt reduction, respectively for both locations. This rootstock showed the lowest disease severity of fusarium wilt (15.3 and 12%), and high grafting efficiency (85 and 88%), respectively in both locations. Grafting also improved plant vigor and cucumber production under heat stress (40-43 °C). The rootstocks VSS-61 F1, Ferro and Super Shintoza significantly increased the total yield of cucumber plants compared to non-grafted cucumber and the rootstock Bottle gourd in both locations. Further studies are needed on grafted plants under multiple stresses in terms of plant biological levels, including physiological, biochemical and genetic attributes.
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Affiliation(s)
- Tarek A. Shalaby
- Arid Land Agriculture Department, College of Agricultural and Food Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi Arabia
- Horticulture Department, Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh 33516, Egypt; (M.T.R.); (Y.A.B.)
- Correspondence: (T.A.S.); (H.S.E.-B.)
| | - Naglaa A. Taha
- Plant Pathology Research Institute, Agriculture Research Center, Giza 12619, Egypt;
| | - Mohamed T. Rakha
- Horticulture Department, Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh 33516, Egypt; (M.T.R.); (Y.A.B.)
| | - Hossam S. El-Beltagi
- Agricultural Biotechnology Department, College of Agricultural and Food Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi Arabia;
- Biochemistry Department, Faculty of Agriculture, Cairo University, Giza 12613, Egypt
- Correspondence: (T.A.S.); (H.S.E.-B.)
| | - Wael F. Shehata
- Agricultural Biotechnology Department, College of Agricultural and Food Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi Arabia;
- Plant Production Department, College of Environmental Agricultural Science, El–Arish University, North Sinai 45511, Egypt
| | - Khaled M. A. Ramadan
- Central Laboratories, Department of Chemistry, King Faisal University, Al-Ahsa 31982, Saudi Arabia;
- Biochemistry Department, Faculty of Agriculture, Ain Shams University, Cairo 11566, Egypt
| | - Hassan El-Ramady
- Soil and Water Department, Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh 33516, Egypt;
- Institute of Animal Science, Biotechnology and Nature Conservation, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, 138 Böszörményi Street, 4032 Debrecen, Hungary
| | - Yousry A. Bayoumi
- Horticulture Department, Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh 33516, Egypt; (M.T.R.); (Y.A.B.)
- Physiology & Breeding of Horticultural Crops Laboratory, Horticulture Department, Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh 33516, Egypt
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Świecimska M, Golińska P, Goodfellow M. Genome-based classification of Streptomyces pinistramenti sp. nov., a novel actinomycete isolated from a pine forest soil in Poland with a focus on its biotechnological and ecological properties. Antonie van Leeuwenhoek 2022; 115:783-800. [DOI: 10.1007/s10482-022-01734-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 03/19/2022] [Indexed: 10/18/2022]
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15
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Meliani H, Makhloufi A, Cherif A, Mahjoubi M, Makhloufi K. Biocontrol of toxinogenic Aspergillus flavus and Fusarium oxysporum f. sp. albedinis by two rare Saharan actinomycetes strains and LC-ESI/MS-MS profiling of their antimicrobial products. Saudi J Biol Sci 2022; 29:103288. [PMID: 35574281 PMCID: PMC9095889 DOI: 10.1016/j.sjbs.2022.103288] [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: 01/30/2022] [Revised: 03/19/2022] [Accepted: 04/17/2022] [Indexed: 11/10/2022] Open
Abstract
Fungi colonizing fruits in the field and post-harvest constitute a major threat to the global food sector. This study focuses on the biocontrol of Aspergillus flavus (aflatoxin-producing mold considered carcinogenic by IARC) and Fusarium oxysporum f. sp. albedinis (FOA) (phytopathogenic agent, causal of El Bayoud in the Algerian and Moroccan Sahara). These molds have a significant economic impact and pose a serious human health problem. The aim of this work is to study the antifungal activity of two rare actinomycetes strains; Saccharothrix sp. COL22 and Actinomadura sp. COL08 strains against toxinogenic A. flavus and F. oxysporum f. sp. albedinis. The strains are isolated from Citrullus colocynthis rhizosphere on different media: ISP2, GLM, TSA, Starch-casein-agar and WYE and with different treatments of the samples (physical, chemical treatment and enrichment). The antifungal tests against the pathogenic microorganisms were performed on ISP2, GLM and TSA medium by means of the agar cylinders method. The kinetics of antibiotic production were performed on ISP medium over 16 days. The characterization of the antimicrobial compounds by LC-ESI/MS-MS showed that the bacterial extracts contain Antibiotic SF 2738C, Tetrodecamycin and Aplysillamide B. The phenotypic and molecular studies showed that Saccharothrix sp. COL22 is closely related to the Saccharothrix longispora strain type and that Actinomadura sp. COL08 is closely related to the Actinomadura hibisca strain type. The two strains are rare and showed an interesting activity against toxinogenic A. flavus and F. oxysporum f. sp. albedinis.
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Setiawan A, Setiawan F, Juliasih NLGR, Widyastuti W, Laila A, Setiawan WA, Djailani FM, Mulyono M, Hendri J, Arai M. Fungicide Activity of Culture Extract from Kocuria palustris 19C38A1 against Fusarium oxysporum. J Fungi (Basel) 2022; 8:jof8030280. [PMID: 35330282 PMCID: PMC8949940 DOI: 10.3390/jof8030280] [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: 02/10/2022] [Revised: 03/03/2022] [Accepted: 03/08/2022] [Indexed: 02/06/2023] Open
Abstract
Secondary metabolites of actinomycetes are a potential source of bioactive compounds in the agricultural sector. This study aimed to determine the fungicidal properties of extracts of marine organism-derived actinomycetes. Actinomycetes were isolated from marine organisms using agar media with 1% colloidal chitin in artificial seawater. Then, the isolates were cultured on liquid media with 1% colloidal chitin in artificial seawater under static conditions for 14 days. The culture was extracted, the fungicide properties were evaluated using the microtiter 96-well plate method, and the influence of inhibition was visualized using apotome and SEM. Finally, the active extract was analyzed using LCMSMS. In the present study, 19 actinomycetes were isolated from marine organisms, and the isolates were examined with regard to their antifungal activities. Of these nineteen isolates, the isolate 19C38A1 was picked out from the rest. Hence, it showed significant control towards F. oxysporum. The prospective strain 19C38A1 was determined to be Kocuria palustris 19C38A1. The extract 19C38A1 was shown to cause damage to cell integrity, indicated by the shrinking form, and inhibited germination in the F. oxysporum; subsequently, the chemical characteristics of the compound produced by the potential isolate 19C38A1 indicated the presence of benzimidazole compounds in the active fraction of C38BK2FA. These results indicate that actinomycetes derived from marine organisms near the coast of Oluhuta, Tomini Bay, Gorontalo, related to strain 19C38A1, are not widely known as sources of valuable fungicides. This preliminary information is important, as it can be used as a basis for further development in the search for fungicides derived from marine actinomycetes.
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Affiliation(s)
- Andi Setiawan
- Department of Chemistry, Faculty of Mathematics and Natural Science, Lampung University, Bandar Lampung 35145, Indonesia; (A.S.); (F.S.); (N.L.G.R.J.); (W.W.); (A.L.); (M.M.)
| | - Fendi Setiawan
- Department of Chemistry, Faculty of Mathematics and Natural Science, Lampung University, Bandar Lampung 35145, Indonesia; (A.S.); (F.S.); (N.L.G.R.J.); (W.W.); (A.L.); (M.M.)
| | - Ni Luh Gede Ratna Juliasih
- Department of Chemistry, Faculty of Mathematics and Natural Science, Lampung University, Bandar Lampung 35145, Indonesia; (A.S.); (F.S.); (N.L.G.R.J.); (W.W.); (A.L.); (M.M.)
| | - Widyastuti Widyastuti
- Department of Chemistry, Faculty of Mathematics and Natural Science, Lampung University, Bandar Lampung 35145, Indonesia; (A.S.); (F.S.); (N.L.G.R.J.); (W.W.); (A.L.); (M.M.)
| | - Aspita Laila
- Department of Chemistry, Faculty of Mathematics and Natural Science, Lampung University, Bandar Lampung 35145, Indonesia; (A.S.); (F.S.); (N.L.G.R.J.); (W.W.); (A.L.); (M.M.)
| | - Wawan A. Setiawan
- Department of Biology, Faculty of Mathematics and Natural Science, Lampung University, Bandar Lampung 35145, Indonesia;
| | - Fernandy M. Djailani
- Department of Fish Processing, Faculty of Fisheries and Marine Science, Gorontalo State University, Gorontalo 96128, Indonesia;
| | - Mulyono Mulyono
- Department of Chemistry, Faculty of Mathematics and Natural Science, Lampung University, Bandar Lampung 35145, Indonesia; (A.S.); (F.S.); (N.L.G.R.J.); (W.W.); (A.L.); (M.M.)
| | - John Hendri
- Department of Chemistry, Faculty of Mathematics and Natural Science, Lampung University, Bandar Lampung 35145, Indonesia; (A.S.); (F.S.); (N.L.G.R.J.); (W.W.); (A.L.); (M.M.)
- Correspondence: (J.H.); (M.A.); Tel.: +62-81-2792-7379 (J.H.); +81-6-6879-8215 (M.A.)
| | - Masayoshi Arai
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka 565-0871, Japan
- Correspondence: (J.H.); (M.A.); Tel.: +62-81-2792-7379 (J.H.); +81-6-6879-8215 (M.A.)
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Saikia J, Mazumdar R, Thakur D. Phylogenetic affiliation of endophytic actinobacteria associated with selected orchid species and their role in growth promotion and suppression of phytopathogens. FRONTIERS IN PLANT SCIENCE 2022; 13:1058867. [PMID: 36570961 PMCID: PMC9769409 DOI: 10.3389/fpls.2022.1058867] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 11/03/2022] [Indexed: 05/22/2023]
Abstract
Endophytic actinobacteria aid in plant development and disease resistance by boosting nutrient uptake or producing secondary metabolites. For the first time, we investigated the culturable endophytic actinobacteria associated with ten epiphytic orchid species of Assam, India. 51 morphologically distinct actinobacteria were recovered from surface sterilized roots and leaves of orchids and characterized based on different PGP and antifungal traits. According to the 16S rRNA gene sequence, these isolates were divided into six families and eight genera, where Streptomyces was most abundant (n=29, 56.86%), followed by Actinomadura, Nocardia, Nocardiopsis, Nocardioides, Pseudonocardia, Microbacterium, and Mycolicibacterium. Regarding PGP characteristics, 25 (49.01%) isolates demonstrated phosphate solubilization in the range of 61.1±4.4 - 289.7±11.9 µg/ml, whereas 27 (52.94%) isolates biosynthesized IAA in the range of 4.0 ± 0.08 - 43.8 ± 0.2 µg/ml, and 35 (68.62%) isolates generated ammonia in the range of 0.9 ± 0.1 - 5.9 ± 0.2 µmol/ml. These isolates also produced extracellular enzymes, viz. protease (43.13%), cellulase (23.52%), pectinase (21.56%), ACC deaminase (27.45%), and chitinase (37.25%). Out of 51 isolates, 27 (52.94%) showed antagonism against at least one test phytopathogen. In molecular screening, most isolates with antifungal and chitinase producing traits revealed the presence of 18 family chitinase genes. Two actinobacterial endophytes, Streptomyces sp. VCLA3 and Streptomyces sp. RVRA7 were ranked as the best strains based on PGP and antifungal activity on bonitur scale. GC-MS examination of ethyl acetate extract of these potent strains displayed antimicrobial compound phenol, 2,4-bis-(1,1-dimethylethyl) as the major metabolite along with other antifungal and plant growth beneficial bioactive chemicals. SEM analysis of fungal pathogen F. oxysporum (MTCC 4633) affected by Streptomyces sp. VCLA3 revealed significant destruction in the spore structure. An in vivo plant growth promotion experiment with VCLA3 and RVRA7 on chili plants exhibited statistically significant (p<0.05) improvements in all of the evaluated vegetative parameters compared to the control. Our research thus gives insight into the diversity, composition, and functional significance of endophytic actinobacteria associated with orchids. This research demonstrates that isolates with multiple plant development and broad-spectrum antifungal properties are beneficial for plant growth. They may provide a viable alternative to chemical fertilizers and pesticides and a sustainable solution for chemical inputs in agriculture.
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Affiliation(s)
- Juri Saikia
- Microbial Biotechnology Laboratory, Life Sciences Division, Institute of Advanced Study in Science and Technology (IASST), Guwahati, India
- Department of Biotechnology, Gauhati University, Guwahati, India
| | - Rajkumari Mazumdar
- Microbial Biotechnology Laboratory, Life Sciences Division, Institute of Advanced Study in Science and Technology (IASST), Guwahati, India
- Department of Molecular Biology & Biotechnology, Cotton University, Guwahati, India
| | - Debajit Thakur
- Microbial Biotechnology Laboratory, Life Sciences Division, Institute of Advanced Study in Science and Technology (IASST), Guwahati, India
- *Correspondence: Debajit Thakur,
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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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Shalaby TA, Abd-Alkarim E, El-Aidy F, Hamed ES, Sharaf-Eldin M, Taha N, El-Ramady H, Bayoumi Y, Dos Reis AR. Nano-selenium, silicon and H 2O 2 boost growth and productivity of cucumber under combined salinity and heat stress. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 212:111962. [PMID: 33550082 DOI: 10.1016/j.ecoenv.2021.111962] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 01/15/2021] [Accepted: 01/18/2021] [Indexed: 05/04/2023]
Abstract
The production of cucumber under combined salinity and heat stress is a crucial challenge facing many countries particularly in arid environments. This challenge could be controlled through exogenous foliar application of some bio-stimulants or anti-stressors. This study was carried out to investigate the management and improving cucumber production under combined salinity and heat stress. Nano-selenium (nano-Se, 25 mg L-1), silicon (Si, 200 mg L-1) and hydrogen peroxide (H2O2, 20 mmol L-1) were foliar applied on cucumber plants as anti-stress compounds. The results revealed that studied anti-stressors improved growth and productivity of cucumber grown in saline soil regardless the kind of anti-stressor under heat stress. The foliar application of nano-Se (25 mg L-1) clearly improved cucumber growth parameters (plant height and leaf area) compared to other anti-stressor and control. Foliar Si application showed the greatest impact on enzymatic antioxidant capacities among the other anti-stressor treatments. This applied rate of Si also showed the greatest increase in marketable fruit yield and yield quality (fruit firmness and total soluble solids) compared to untreated plants. These increases could be due to increasing nutrient uptake particularly N, P, K, and Mg, as well as Se (by 40.2% and 43%) in leaves and Si (by 11.2% and 22.1% in fruits) in both seasons, respectively. The potential role of Si in mitigating soil salinity under heat stress could be referred to high Si content found in leaf which regulates water losses via transpiration as well as high nutrient uptake of other nutrients (N, P, K, Mg and Se). The distinguished high K+ content found in cucumber leaves might help stressed plants to tolerate studied stresses by regulating the osmotic balance and controlling stomatal opening, which support cultivated plants to adapt to soil salinity under heat stress. Further studies are needed to be carried out concerning the different response of cultivated plants to combined stresses.
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Affiliation(s)
- Tarek A Shalaby
- Horticulture Department, Faculty of Agriculture, University of Kafrelsheikh, Kafr El-Sheikh 33516, Egypt; Department of Arid Land Agriculture, College of Agricultural and Food Science, King Faisal University, P.O. 400, Al-Ahsa 31982, Saudi Arabia
| | - Emad Abd-Alkarim
- Horticulture Department, Faculty of Agriculture, University of Kafrelsheikh, Kafr El-Sheikh 33516, Egypt
| | - Farouk El-Aidy
- Horticulture Department, Faculty of Agriculture, University of Kafrelsheikh, Kafr El-Sheikh 33516, Egypt
| | - El-Samahy Hamed
- Vegetable crops Department, Horticulture Institute, Agriculture Research Center, Giza, Egypt
| | - Mohamed Sharaf-Eldin
- Horticulture Department, Faculty of Agriculture, University of Kafrelsheikh, Kafr El-Sheikh 33516, Egypt
| | - Naglaa Taha
- Plant Pathology Research Institute, Agriculture Research Center, 12619 Giza, Egypt
| | - Hassan El-Ramady
- Soil and Water Dept., Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh 33516, Egypt
| | - Yousry Bayoumi
- Horticulture Department, Faculty of Agriculture, University of Kafrelsheikh, Kafr El-Sheikh 33516, Egypt; Physiology & Breeding of Horticultural Crops Laboratory, Horticulture Dept., Faculty of Agriculture, Kafrelsheikh University, Egypt
| | - André Rodrigues Dos Reis
- Department of Biosystems Engineering, School of Sciences and Engineering, São Paulo State University (UNESP), Tupã-SP 17602-496, Brazil.
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Huang X, Ren J, Li P, Feng S, Dong P, Ren M. Potential of microbial endophytes to enhance the resistance to postharvest diseases of fruit and vegetables. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2021; 101:1744-1757. [PMID: 32974893 DOI: 10.1002/jsfa.10829] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 09/17/2020] [Accepted: 09/24/2020] [Indexed: 06/11/2023]
Abstract
Food loss of fruit and vegetables caused by postharvest diseases is a major issue worldwide. The method used to prevent and control postharvest diseases is usually to use chemical fungicides, but long-term and large-scale use will make the pathogens resistant and potentially have a negative impact on human health and the ecological environment. Therefore, finding a safe and effective biological control method instead of chemical control is a hot research topic in recent years. Endophytes, colonizing plants asymptomatically, can promote the growth of the hosts and enhance their resistance. The use of endophytes as biological control agents for postharvest diseases of fruit and vegetables has attracted increasing attention in the last 20 years. Compared with chemical control, endophytes have the advantages of being more environmentally friendly, sustainable, and safer. However, there are relatively few relevant studies, so herein we summarize the available literature. This review focuses mainly on the recent progress of using endophytes to enhance the resistance of postharvest fruit and vegetables to diseases, with the emphasis on the possible mechanisms and the potential applications. Furthermore, this article suggests future areas for study using antagonistic endophytes to prevent and control fruit and vegetable postharvest diseases: (i) screening more potential broad-spectrum anti-pathogen endophytes and their metabolic active substances by the method of macrogenomics; (ii) elucidating the underlining molecular mechanism among endophytes, harvested vegetables and fruit, pathogens, and microbial communities; (iii) needing more application research to overcome the difficulties of commercialization practice. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Xiaoqing Huang
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Jie Ren
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Peihua Li
- College of Agronomy, Xichang University, Xichang, China
| | - Shun Feng
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Pan Dong
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Maozhi Ren
- School of Life Sciences, Chongqing University, Chongqing, China
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu, China
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Characterization of a Novel Endophytic Actinomycete, Streptomyces physcomitrii sp. nov., and Its Biocontrol Potential Against Ralstonia solanacearum on Tomato. Microorganisms 2020; 8:microorganisms8122025. [PMID: 33352827 PMCID: PMC7765990 DOI: 10.3390/microorganisms8122025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 12/12/2020] [Accepted: 12/15/2020] [Indexed: 12/18/2022] Open
Abstract
Bacterial wilt of tomato is a destructive disease caused by Ralstonia solanacearum throughout the world. An endophytic actinomycete with antagonistic activity, designated strain LD120T, was isolated from moss (Physcomitrium sphaericum (Ludw) Fuernr). The biocontrol test demonstrated that co-inoculation by the isolate and the pathogen gave the greatest biocontrol efficiency of 63.6%. Strain LD120T had morphological characteristics and chemotaxonomic properties identical to those of members of the genus Streptomyces. The diamino acid present in the cell wall was LL-diaminopimelic acid. Arabinose, glucose, rhamnose, and ribose occured in whole cell hydrolysates. The menaquinones detected were MK-9(H4), MK-9(H6), MK-9(H8), and MK-9(H2). The polar lipid profile was found to contain diphosphatidylglycerol, phosphatidylethanolamine, and phosphatidylinositol. The major cellular fatty acids were found to be iso-C16:0, iso-C17:0, anteiso-C15:0, and C16:1 ω7c. The DNA G+C content of the draft genome sequence, consisting of 7.6 Mbp, was 73.1%. Analysis of the 16S rRNA gene sequence showed that strain LD120T belongs to the genus Streptomyces, with the highest sequence similarity to Streptomyces azureus NRRL B-2655T (98.97%), but phylogenetically clustered with Streptomyces anandii NRRL B-3590T (98.62%). Multilocus sequence analysis based on five other house-keeping genes (atpD, gyrB, rpoB, recA, and trpB) and the low level of DNA–DNA relatedness, as well as phenotypic differences, allowed strain LD120T to be differentiated from its closely related strains. Therefore, the strain was concluded to represent a novel species of the genus Streptomyces, for which the name Streptomycesphyscomitrii sp. nov. was proposed. The type strain was LD120T (=CCTCC AA 2018049T = DSM 110638T).
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Identification and Characterization of a Streptomyces albus Strain and Its Secondary Metabolite Organophosphate against Charcoal Rot of Sorghum. PLANTS 2020; 9:plants9121727. [PMID: 33297539 PMCID: PMC7762395 DOI: 10.3390/plants9121727] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/01/2020] [Accepted: 12/01/2020] [Indexed: 12/05/2022]
Abstract
Streptomycesalbus strain CAI-21 has been previously reported to have plant growth-promotion abilities in chickpea, pigeonpea, rice, and sorghum. The strain CAI-21 and its secondary metabolite were evaluated for their biocontrol potential against charcoal rot disease in sorghum caused by Macrophomina phaseolina. Results exhibited that CAI-21 significantly inhibited the growth of the pathogen, M. phaseolina, in dual-culture (15 mm; zone of inhibition), metabolite production (74% inhibition), and blotter paper (90% inhibition) assays. When CAI-21 was tested for its biocontrol potential under greenhouse and field conditions following inoculation of M. phaseolina by toothpick method, it significantly reduced the number of internodes infected (75% and 45% less, respectively) and length of infection (75% and 51% less, respectively) over the positive control (only M. phaseolina inoculated) plants. Under greenhouse conditions, scanning electron microscopic analysis showed that the phloem and xylem tissues of the CAI-21-treated shoot samples were intact compared to those of the diseased stem samples. The culture filtrate of the CAI-21 was purified by various chromatographic techniques, and the active compound was identified as “organophosphate” by NMR and MS. The efficacy of organophosphate was found to inhibit the growth of M. phaseolina in the poisoned food technique. This study indicates that S.albus CAI-21 and its active metabolite organophosphate have the potential to control charcoal rot in sorghum.
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