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Hao H, Yue Y, Chen Q, Yang Y, Kuai B, Wang Q, Xiao T, Chen H, Zhang J. Effects of an efficient straw decomposition system mediated by Stropharia rugosoannulata on soil properties and microbial communities in forestland. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 916:170226. [PMID: 38280599 DOI: 10.1016/j.scitotenv.2024.170226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/20/2023] [Accepted: 01/15/2024] [Indexed: 01/29/2024]
Abstract
Cultivation of Stropharia rugosoannulata with straw in forestland is effective for straw biodegradation and can prevent the waste of straw resources and environmental pollution and generate economic benefits. However, there is a lack of systematic evaluation of spent mushroom substrate (SMS) input into forestland, such as soil properties and microbial succession. In this experiment, 0 (CK), 10 (SA), 20 (SB), 30 (SC), 40 (SD), and 50 (SE) kg/m2 straw were used to cultivate S. rugosoannulata, and two soil layers (0-10 cm, 10-20 cm) of the cultivated forestland were analyzed. The results indicated that SMS significantly promoted nutrient accumulation in forestland. The bacterial alpha diversity in the SC treatment group was greater than that in the control and gradually decreased to the control level with interannual changes, while the trend of fungal alpha diversity was opposite to that of bacterial alpha diversity. Furthermore, the SC treatment group positively affected soil nitrogen metabolism-related microorganisms for two consecutive years and significantly promoted tree growth. Habitat niche breadth and null model analysis revealed that bacterial communities were more sensitive than fungal communities after SMS input. Linear mixed model (LMM) analysis revealed that SMS supplementation significantly positively affected bacteria (Gammaproteobacteria and Bacteroidota) and significantly negatively affected fungi (Coniochaetales). The constructed fungal-bacterial co-occurrence networks exhibited modularity, and the five types of bacteria were significantly correlated with soil organic matter (SOM), soil organic carbon (SOC), available potassium (AK), available phosphorus (AAP) and available nitrogen (AN) levels. The structural equation model (SEM) showed that bacterial diversity responded more to changes in soil nutrients than did fungal diversity. Overall, 30 kg/m2 of straw decomposition and 2 years of continuous cultivation were beneficial to soil health. This study provides new insights into the rational decomposition of straw and maintenance of forestland ecological balance by S. rugosoannulata.
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Affiliation(s)
- Haibo Hao
- National Research Center for Edible Fungi Biotechnology and Engineering, Key Laboratory of Applied Mycological Resources and Utilization, Ministry of Agriculture, Shanghai Key Laboratory of Agricultural Genetics and Breeding, Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China; State Key Laboratory of Genetic Engineering and Fudan Center for Genetic Diversity and Designing Agriculture, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Yihong Yue
- National Research Center for Edible Fungi Biotechnology and Engineering, Key Laboratory of Applied Mycological Resources and Utilization, Ministry of Agriculture, Shanghai Key Laboratory of Agricultural Genetics and Breeding, Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Qun Chen
- School of Biology Food and Environment, Hefei University, Hefei 23060, China
| | - Yan Yang
- National Research Center for Edible Fungi Biotechnology and Engineering, Key Laboratory of Applied Mycological Resources and Utilization, Ministry of Agriculture, Shanghai Key Laboratory of Agricultural Genetics and Breeding, Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Benke Kuai
- State Key Laboratory of Genetic Engineering and Fudan Center for Genetic Diversity and Designing Agriculture, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Qian Wang
- National Research Center for Edible Fungi Biotechnology and Engineering, Key Laboratory of Applied Mycological Resources and Utilization, Ministry of Agriculture, Shanghai Key Laboratory of Agricultural Genetics and Breeding, Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Tingting Xiao
- National Research Center for Edible Fungi Biotechnology and Engineering, Key Laboratory of Applied Mycological Resources and Utilization, Ministry of Agriculture, Shanghai Key Laboratory of Agricultural Genetics and Breeding, Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Hui Chen
- National Research Center for Edible Fungi Biotechnology and Engineering, Key Laboratory of Applied Mycological Resources and Utilization, Ministry of Agriculture, Shanghai Key Laboratory of Agricultural Genetics and Breeding, Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China.
| | - Jinjing Zhang
- National Research Center for Edible Fungi Biotechnology and Engineering, Key Laboratory of Applied Mycological Resources and Utilization, Ministry of Agriculture, Shanghai Key Laboratory of Agricultural Genetics and Breeding, Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China.
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Weber RWS, Petridis A. Fungicide Resistance in Botrytis spp. and Regional Strategies for Its Management in Northern European Strawberry Production. BIOTECH 2023; 12:64. [PMID: 37987481 PMCID: PMC10660734 DOI: 10.3390/biotech12040064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 11/09/2023] [Accepted: 11/14/2023] [Indexed: 11/22/2023] Open
Abstract
Grey mould, caused by Botrytis cinerea and other Botrytis spp., is a major cause of fruit rot in strawberries and other fruit crops worldwide. Repeated fungicide applications are essential in order to secure harvests. However, resistance to all currently registered single-site fungicides is widespread. The rising importance of strains with multiple resistance to most or all fungicides is of particular concern. These strains may be introduced into fields via contaminated nursery plants and/or by immigration from adjacent plots. On the basis of research conducted in northern German and Danish strawberry production, a concept to manage fungicide resistance under northern European conditions has been developed and put into regional strawberry production practice. This principally includes the testing of nursery plants for fungicide-resistant Botrytis strains prior to planting; the restricted and specific use of fungicides at flowering in the production fields, taking account of the resistance spectrum within the local Botrytis population; and crop sanitation measures such as the removal of rotting fruits at the beginning of harvest. Further options such as protected cultivation, reduced fertilisation and biological control are also discussed. The practical implementation of such a strategy in northern Germany and Denmark has been shown to reduce the occurrence of multi-resistant strains to a tolerable steady-state level.
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Affiliation(s)
- Roland W. S. Weber
- Lower Saxony Chamber of Agriculture, Esteburg Centre, Moorende 53, 21635 Jork, Germany
- Department of Food Science, Aarhus University, Agro Food Park 48, 8200 Aarhus, Denmark;
| | - Antonios Petridis
- Department of Food Science, Aarhus University, Agro Food Park 48, 8200 Aarhus, Denmark;
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Toffolatti SL, Davillerd Y, D’Isita I, Facchinelli C, Germinara GS, Ippolito A, Khamis Y, Kowalska J, Maddalena G, Marchand P, Marcianò D, Mihály K, Mincuzzi A, Mori N, Piancatelli S, Sándor E, Romanazzi G. Are Basic Substances a Key to Sustainable Pest and Disease Management in Agriculture? An Open Field Perspective. PLANTS (BASEL, SWITZERLAND) 2023; 12:3152. [PMID: 37687399 PMCID: PMC10490370 DOI: 10.3390/plants12173152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Revised: 08/23/2023] [Accepted: 08/30/2023] [Indexed: 09/10/2023]
Abstract
Pathogens and pests constantly challenge food security and safety worldwide. The use of plant protection products to manage them raises concerns related to human health, the environment, and economic costs. Basic substances are active, non-toxic compounds that are not predominantly used as plant protection products but hold potential in crop protection. Basic substances' attention is rising due to their safety and cost-effectiveness. However, data on their protection levels in crop protection strategies are lacking. In this review, we critically analyzed the literature concerning the field application of known and potential basic substances for managing diseases and pests, investigating their efficacy and potential integration into plant protection programs. Case studies related to grapevine, potato, and fruit protection from pre- and post-harvest diseases and pests were considered. In specific cases, basic substances and chitosan in particular, could complement or even substitute plant protection products, either chemicals or biologicals, but their efficacy varied greatly according to various factors, including the origin of the substance, the crop, the pathogen or pest, and the timing and method of application. Therefore, a careful evaluation of the field application is needed to promote the successful use of basic substances in sustainable pest management strategies in specific contexts.
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Affiliation(s)
- Silvia Laura Toffolatti
- Dipartimento di Scienze Agrarie e Ambientali (DiSAA), Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy; (G.M.); (D.M.)
| | - Yann Davillerd
- Institut de l’Agriculture et de l’Alimentation Biologiques (ITAB), 149 rue de BERCY, F-75012 Paris, France; (Y.D.); (P.M.)
| | - Ilaria D’Isita
- Dipartimento di Scienze Agrarie, Alimenti, Risorse Naturali e Ingegneria (DAFNE), University of Foggia, Via Napoli 25, 71122 Foggia, Italy; (I.D.); (G.S.G.)
| | - Chiara Facchinelli
- Department of Biotechnology, University of Verona, Strada le Grazie 15, 37134 Verona, Italy; (C.F.); (A.M.); (N.M.)
| | - Giacinto Salvatore Germinara
- Dipartimento di Scienze Agrarie, Alimenti, Risorse Naturali e Ingegneria (DAFNE), University of Foggia, Via Napoli 25, 71122 Foggia, Italy; (I.D.); (G.S.G.)
| | - Antonio Ippolito
- Department of Soil, Plant and Food Sciences, University of Bari Aldo Moro, Via Amendola 165/A, 70126 Bari, Italy;
| | - Youssef Khamis
- Agricultural Research Center, Plant Pathology Research Institute, 9 Gamaa St., Giza 12619, Egypt;
| | - Jolanta Kowalska
- Department of Organic Agriculture and Environmental Protection, Institute of Plant Protection–National Research Institute, Władysława Wêgorka 20, 60-318 Poznañ, Poland;
| | - Giuliana Maddalena
- Dipartimento di Scienze Agrarie e Ambientali (DiSAA), Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy; (G.M.); (D.M.)
| | - Patrice Marchand
- Institut de l’Agriculture et de l’Alimentation Biologiques (ITAB), 149 rue de BERCY, F-75012 Paris, France; (Y.D.); (P.M.)
| | - Demetrio Marcianò
- Dipartimento di Scienze Agrarie e Ambientali (DiSAA), Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy; (G.M.); (D.M.)
| | - Kata Mihály
- Faculty of Agricultural and Food Science and Environmental Management, Institute of Food Science, University of Debrecen, Böszörményi út 138, 4032 Debrecen, Hungary; (K.M.); (E.S.)
| | - Annamaria Mincuzzi
- Department of Biotechnology, University of Verona, Strada le Grazie 15, 37134 Verona, Italy; (C.F.); (A.M.); (N.M.)
| | - Nicola Mori
- Department of Biotechnology, University of Verona, Strada le Grazie 15, 37134 Verona, Italy; (C.F.); (A.M.); (N.M.)
| | - Simone Piancatelli
- Department of Agricultural, Food and Environmental Sciences, Marche Polytechnic University, Via Brecce Bianche 10, 60131 Ancona, Italy; (S.P.); (G.R.)
| | - Erzsébet Sándor
- Faculty of Agricultural and Food Science and Environmental Management, Institute of Food Science, University of Debrecen, Böszörményi út 138, 4032 Debrecen, Hungary; (K.M.); (E.S.)
| | - Gianfranco Romanazzi
- Department of Agricultural, Food and Environmental Sciences, Marche Polytechnic University, Via Brecce Bianche 10, 60131 Ancona, Italy; (S.P.); (G.R.)
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Nie H, Lv B, Sun M, Zhong Z, Li S. Pre-treatment with Dazomet enhances the biocontrol efficacy of purpureocillium lilacinum to Meloidogyne incognita. BMC Microbiol 2023; 23:244. [PMID: 37653404 PMCID: PMC10469884 DOI: 10.1186/s12866-023-02978-8] [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: 06/08/2023] [Accepted: 08/14/2023] [Indexed: 09/02/2023] Open
Abstract
BACKGROUND Meloidogyne incognita greatly restricts the production of protected vegetables in China. Application of biocontrol agent Purpureocillium lilacinum is an important practice to control the nematode; however, instability usually occurs especially in heavily infested field. This study aimed to illustrate the high efficiency of P. lilacinum agent with fumigant Dazomet in vitro. RESULTS P. lilacinum YES-2-14 showed strong parasitic and nematicidal activities to M. incognita. Pre-treatment with Dazomet significantly enhanced the biocontrol effects of the fungus. After fumigation with Dazomet at a dosage of 7.5 mg kg- 1 soil, parasitism of YES-2-14 on M. incognita eggs increased by more than 50%. Meanwhile, when P. lilacinum fermentation filtrate treated following Dazomet fumigation at 10 and 20 mg kg- 1 soil, the mortalities of second-stage juveniles (J2s) increased by 110.2% and 72.7%, respectively. Both Dazomet and P. lilacinum significantly reduced the penetration ability of J2s to tomato roots. When P. lilacinum filtrate used alone, the J2s penetrating into the young roots decreased by 48.8% at 4 dpi; while in the combined treatment, almost no J2 was detected within the roots at 4 dpi and the number of knots reduced by more than 99% at 45 dpi, indicating a synergistic effect of the biocontrol fungus and fumigant. CONCLUSIONS Pre-treatment with Dazomet greatly increased the biocontrol efficacy of P. lilacinum to M. incognita. This research provides insight into the efficient management of plant parasitic nematodes and effective use of biocontrol agents.
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Affiliation(s)
- Haizhen Nie
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Binna Lv
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Manhong Sun
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
| | - Zengming Zhong
- Beijing Qigao Biological Technology Co. Ltd, Beijing, 100193, China
| | - Shidong Li
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
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Ma Y, Wu M, Qin X, Dong Q, Li Z. Antimicrobial function of yeast against pathogenic and spoilage microorganisms via either antagonism or encapsulation: A review. Food Microbiol 2023; 112:104242. [PMID: 36906324 DOI: 10.1016/j.fm.2023.104242] [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: 10/19/2022] [Revised: 02/13/2023] [Accepted: 02/19/2023] [Indexed: 02/23/2023]
Abstract
Contaminations of pathogenic and spoilage microbes on foods are threatening food safety and quality, highlighting the importance of developing antimicrobial agents. According to different working mechanisms, the antimicrobial activities of yeast-based agents were summarized from two aspects: antagonism and encapsulation. Antagonistic yeasts are usually applied as biocontrol agents for the preservation of fruits and vegetables via inactivating spoilage microbes, usually phytopathogens. This review systematically summarized various species of antagonistic yeasts, potential combinations to improve the antimicrobial efficiency, and the antagonistic mechanisms. The wide applications of the antagonistic yeasts are significantly limited by undesirable antimicrobial efficiency, poor environmental resistance, and a narrow antimicrobial spectrum. Another strategy for achieving effective antimicrobial activity is to encapsulate various chemical antimicrobial agents into a yeast-based carrier that has been previously inactivated. This is accomplished by immersing the dead yeast cells with porous structure in an antimicrobial suspension and applying high vacuum pressure to allow the agents to diffuse inside the yeast cells. Typical antimicrobial agents encapsulated in the yeast carriers have been reviewed, including chlorine-based biocides, antimicrobial essential oils, and photosensitizers. Benefiting from the existence of the inactive yeast carrier, the antimicrobial efficiencies and functional durability of the encapsulated antimicrobial agents, such as chlorine-based agents, essential oils, and photosensitizers, are significantly improved compared with the unencapsulated ones.
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Affiliation(s)
- Yue Ma
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, Shanghai, China.
| | - Mengjie Wu
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, Shanghai, China.
| | - Xiaojie Qin
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, Shanghai, China.
| | - Qingli Dong
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, Shanghai, China.
| | - Zhuosi Li
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, Shanghai, China.
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Su Z, Liu G, Liu X, Li S, Lu X, Wang P, Zhao W, Zhang X, Dong L, Qu Y, Zhang J, Mo S, Guo Q, Ma P. Functional Analyses of the Bacillus velezensis HMB26553 Genome Provide Evidence That Its Genes Are Potentially Related to the Promotion of Plant Growth and Prevention of Cotton Rhizoctonia Damping-Off. Cells 2023; 12:cells12091301. [PMID: 37174701 PMCID: PMC10177454 DOI: 10.3390/cells12091301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/18/2023] [Accepted: 04/27/2023] [Indexed: 05/15/2023] Open
Abstract
Bacillus spp. is one kind of the important representative biocontrol agents against plant diseases and promoting plant growth. In this study, the whole genomic sequence of bacterial strain HMB26553 was obtained. A phylogenetic tree based on the genome and ANI (average nucleotide identity), as well as dDDH (digital DNA-DNA hybridization), was constructed, and strain HMB26553 was identified as Bacillus velezensis. Fourteen biosynthetic gene clusters responsible for secondary metabolite were predicted via anti-SMASH, and six secondary metabolites were identified by UHPLC-QTOF-MS/MS (ultra-high-performance liquid chromatography coupled to quadrupole-time-of-flight tandem mass spectrometry). When the phytopathogen Rhizoctonia solani was treated with B. velezensis HMB26553, the mycelial structure changed, ROS (reactive oxygen species) accumulated, and the mitochondrial membrane potential decreased. Characteristics of strain HMB26553 were predicted and confirmed by genomic information and experiments, such as producing IAA, siderophore, extracellular enzymes and biofilm, as well as moving and promoting cotton growth. All these results suggested the mechanisms by which B. velezensis HMB26553 inhibits pathogen growth and promotes cotton growth, which likely provided the potential biocontrol agent to control cotton Rhizoctonia damping-off.
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Affiliation(s)
- Zhenhe Su
- Institute of Plant Protection, Hebei Academy of Agricultural and Forestry Sciences, Integrated Pest Management Innovation Center of Hebei Province, Key Laboratory of IPM on Crops in Northern Region of North China, Ministry of Agriculture and Rural Affairs of China, Baoding 071000, China
| | - Gaoge Liu
- Institute of Plant Protection, Hebei Academy of Agricultural and Forestry Sciences, Integrated Pest Management Innovation Center of Hebei Province, Key Laboratory of IPM on Crops in Northern Region of North China, Ministry of Agriculture and Rural Affairs of China, Baoding 071000, China
| | - Xiaomeng Liu
- Institute of Plant Protection, Hebei Academy of Agricultural and Forestry Sciences, Integrated Pest Management Innovation Center of Hebei Province, Key Laboratory of IPM on Crops in Northern Region of North China, Ministry of Agriculture and Rural Affairs of China, Baoding 071000, China
| | - Shezeng Li
- Institute of Plant Protection, Hebei Academy of Agricultural and Forestry Sciences, Integrated Pest Management Innovation Center of Hebei Province, Key Laboratory of IPM on Crops in Northern Region of North China, Ministry of Agriculture and Rural Affairs of China, Baoding 071000, China
| | - Xiuyun Lu
- Institute of Plant Protection, Hebei Academy of Agricultural and Forestry Sciences, Integrated Pest Management Innovation Center of Hebei Province, Key Laboratory of IPM on Crops in Northern Region of North China, Ministry of Agriculture and Rural Affairs of China, Baoding 071000, China
| | - Peipei Wang
- Institute of Plant Protection, Hebei Academy of Agricultural and Forestry Sciences, Integrated Pest Management Innovation Center of Hebei Province, Key Laboratory of IPM on Crops in Northern Region of North China, Ministry of Agriculture and Rural Affairs of China, Baoding 071000, China
| | - Weisong Zhao
- Institute of Plant Protection, Hebei Academy of Agricultural and Forestry Sciences, Integrated Pest Management Innovation Center of Hebei Province, Key Laboratory of IPM on Crops in Northern Region of North China, Ministry of Agriculture and Rural Affairs of China, Baoding 071000, China
| | - Xiaoyun Zhang
- Institute of Plant Protection, Hebei Academy of Agricultural and Forestry Sciences, Integrated Pest Management Innovation Center of Hebei Province, Key Laboratory of IPM on Crops in Northern Region of North China, Ministry of Agriculture and Rural Affairs of China, Baoding 071000, China
| | - Lihong Dong
- Institute of Plant Protection, Hebei Academy of Agricultural and Forestry Sciences, Integrated Pest Management Innovation Center of Hebei Province, Key Laboratory of IPM on Crops in Northern Region of North China, Ministry of Agriculture and Rural Affairs of China, Baoding 071000, China
| | - Yuanhang Qu
- Institute of Plant Protection, Hebei Academy of Agricultural and Forestry Sciences, Integrated Pest Management Innovation Center of Hebei Province, Key Laboratory of IPM on Crops in Northern Region of North China, Ministry of Agriculture and Rural Affairs of China, Baoding 071000, China
| | - Jiaqi Zhang
- Institute of Plant Protection, Hebei Academy of Agricultural and Forestry Sciences, Integrated Pest Management Innovation Center of Hebei Province, Key Laboratory of IPM on Crops in Northern Region of North China, Ministry of Agriculture and Rural Affairs of China, Baoding 071000, China
| | - Shaojing Mo
- Institute of Plant Protection, Hebei Academy of Agricultural and Forestry Sciences, Integrated Pest Management Innovation Center of Hebei Province, Key Laboratory of IPM on Crops in Northern Region of North China, Ministry of Agriculture and Rural Affairs of China, Baoding 071000, China
| | - Qinggang Guo
- Institute of Plant Protection, Hebei Academy of Agricultural and Forestry Sciences, Integrated Pest Management Innovation Center of Hebei Province, Key Laboratory of IPM on Crops in Northern Region of North China, Ministry of Agriculture and Rural Affairs of China, Baoding 071000, China
| | - Ping Ma
- Institute of Plant Protection, Hebei Academy of Agricultural and Forestry Sciences, Integrated Pest Management Innovation Center of Hebei Province, Key Laboratory of IPM on Crops in Northern Region of North China, Ministry of Agriculture and Rural Affairs of China, Baoding 071000, China
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Leal C, Gramaje D, Fontaine F, Richet N, Trotel-Aziz P, Armengol J. Evaluation of Bacillus subtilis PTA-271 and Trichoderma atroviride SC1 to control Botryosphaeria dieback and black-foot pathogens in grapevine propagation material. PEST MANAGEMENT SCIENCE 2023; 79:1674-1683. [PMID: 36573682 DOI: 10.1002/ps.7339] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 12/12/2022] [Accepted: 12/27/2022] [Indexed: 06/17/2023]
Abstract
BACKGROUND Grapevine trunk diseases (GTDs) are a complex group of diseases that lead to major economic losses in all wine-producing countries. The investigation of biocontrol agents (BCAs) capable of forestalling or at least minimizing the development of GTDs has, recently, become a priority. Nursery experiments were set up to (i) assess the biocontrol effect of Trichoderma atroviride (Ta) SC1 and Bacillus subtilis (Bs) PTA-271, alone and in simultaneous application, against Botryosphaeria dieback (BOT)- and black-foot (BF)- associated pathogens during the grapevine propagation process and (ii) evaluate the success of the BCA inoculation during the grapevine propagation process, using quantitative reverse-transcription polymerase chain reaction techniques. RESULTS The results demonstrated a significant reduction in the percentage of potentially infected plants and the percentage of fungal isolation from wood fragments of BOT and BF pathogens in nursery material treated with Ta SC1 and Bs PTA-271, respectively. In one of the experiments, simultaneous treatments with Bs PTA-271 and Ta SC1 caused a reduction in percentages of potentially infected plants and fungal isolation, from wood fragments containing BOT and BF pathogens. CONCLUSION These biological treatments may be relevant components of an integrated approach, using complementary management strategies to limit infection by GTD pathogens, but further research is still needed to elucidate the effectiveness of Bs PTA-271 and the benefits of simultaneous application with Ta SC1 for the control of GTD pathogens in nurseries. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Catarina Leal
- Instituto Agroforestal Mediterráneo, Universitat Politècnica de València, Valencia, Spain
- University of Reims Champagne-Ardenne, Résistance Induite et Bioprotection des Plantes Research Unit, EA 4707, INRAE USC 1488, SFR Condorcet FR CNRS 3417, Reims, France
| | - David Gramaje
- Instituto de Ciencias de la Vid y del Vino (ICVV), Consejo Superior de Investigaciones Científicas, Universidad de la Rioja, Gobierno de La Rioja, Logroño, Spain
| | - Florence Fontaine
- University of Reims Champagne-Ardenne, Résistance Induite et Bioprotection des Plantes Research Unit, EA 4707, INRAE USC 1488, SFR Condorcet FR CNRS 3417, Reims, France
| | - Nicolas Richet
- University of Reims Champagne-Ardenne, Résistance Induite et Bioprotection des Plantes Research Unit, EA 4707, INRAE USC 1488, SFR Condorcet FR CNRS 3417, Reims, France
| | - Patricia Trotel-Aziz
- University of Reims Champagne-Ardenne, Résistance Induite et Bioprotection des Plantes Research Unit, EA 4707, INRAE USC 1488, SFR Condorcet FR CNRS 3417, Reims, France
| | - Josep Armengol
- Instituto Agroforestal Mediterráneo, Universitat Politècnica de València, Valencia, Spain
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Anuar MSK, Hashim AM, Ho CL, Wong MY, Sundram S, Saidi NB, Yusof MT. Synergism: biocontrol agents and biostimulants in reducing abiotic and biotic stresses in crop. World J Microbiol Biotechnol 2023; 39:123. [PMID: 36934342 DOI: 10.1007/s11274-023-03579-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 03/12/2023] [Indexed: 03/20/2023]
Abstract
In today's fast-shifting climate change scenario, crops are exposed to environmental pressures, abiotic and biotic stress. Hence, these will affect the production of agricultural products and give rise to a worldwide economic crisis. The increase in world population has exacerbated the situation with increasing food demand. The use of chemical agents is no longer recommended due to adverse effects towards the environment and health. Biocontrol agents (BCAs) and biostimulants, are feasible options for dealing with yield losses induced by plant stresses, which are becoming more intense due to climate change. BCAs and biostimulants have been recommended due to their dual action in reducing both stresses simultaneously. Although protection against biotic stresses falls outside the generally accepted definition of biostimulant, some microbial and non-microbial biostimulants possess the biocontrol function, which helps reduce biotic pressure on crops. The application of synergisms using BCAs and biostimulants to control crop stresses is rarely explored. Currently, a combined application using both agents offer a great alternative to increase the yield and growth of crops while managing stresses. This article provides an overview of crop stresses and plant stress responses, a general knowledge on synergism, mathematical modelling used for synergy evaluation and type of in vitro and in vivo synergy testing, as well as the application of synergism using BCAs and biostimulants in reducing crop stresses. This review will facilitate an understanding of the combined effect of both agents on improving crop yield and growth and reducing stress while also providing an eco-friendly alternative to agroecosystems.
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Affiliation(s)
- Muhammad Salahudin Kheirel Anuar
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, UPM, Selangor, 43400, Malaysia
| | - Amalia Mohd Hashim
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, UPM, Selangor, 43400, Malaysia
| | - Chai Ling Ho
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, UPM, Selangor, 43400, Malaysia
| | - Mui-Yun Wong
- Department of Plant Protection, Faculty of Agriculture, Universiti Putra Malaysia, Serdang, UPM, Selangor, 43400, Malaysia
| | - Shamala Sundram
- Biology Research Division, Malaysian Palm Oil Board, Kajang, Selangor, 43000, Malaysia
| | - Noor Baity Saidi
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, UPM, Selangor, 43400, Malaysia
| | - Mohd Termizi Yusof
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, UPM, Selangor, 43400, Malaysia.
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Joshi N, Saraf M, Jha CK, Sudha A, Alharbi SA, Alfarraj S, Datta R. Harnessing the efficacy of multifunctional rhizobacterial consortia for promoting the growth of Anethum graveolens L. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2023. [DOI: 10.3389/fsufs.2023.1126621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023] Open
Abstract
Co-cultures of bacteria are more metabolically flexible and more tolerant to changes in the environment than single cultures. In order to test for plant growth promotion in a medicinal herb Anethum graveolens L, potent phosphate-solubilizing rhizobacteria were selected, characterized and assessed for their compatibility with each other. Molecular identification of isolates was made by 16s rRNA sequence, and they were identified as Pseudomonas aeruginosaNJC4 (OP289324), Serratia marcescens NJC21 (OP289323) and Bacillus spp. Dual species consortia, namely, Bacillus spp. + Serratia marcescens NJC21 (T1), and Pseudomonas aeruginosa NJC4 + Serratia marcescens NJC21 (T2), were tested for their ability to produce multiple plant beneficial activities such as phosphate solubilization, and ammonia and indole acetic acid production. The best isolate and consortium were evaluated for plant growth promotion activity. A plant treated with consortia T-2 seemed most effective in seed emergence at 84.66%, which was four times superior to the control. Growth and yield characters, along with all different rhizobacterial treatments, were examined by principal component analysis (PCA), where PC1 can explain 51.37% of the total variance and PC2 can explain 26.75%. PC1 was associated with wet biomass, chlorophyll b, and total chlorophyll content, which reflect the strong influence of consortia T-1. At the same time, PC2 was found to be related to dry biomass and chlorophyll a content. This study lends credence to the theory that microbial consortiums consisting of more than one efficient strains may be more effective than single cultures in boosting the increase of agricultural output in a sustainable way.
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Price-Christenson G, Yannarell A. Use of Ecological Theory to Understand the Efficacy and Mechanisms of Multistrain Biological Control. PHYTOPATHOLOGY 2023; 113:381-389. [PMID: 36656290 DOI: 10.1094/phyto-04-22-0115-rvw] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Since the 1970s, over 6,500 articles have been published about microbial biocontrols and over 200 microbial isolates have been registered for commercial use. However, many of these solutions have seen limited use due to limitations with their in-field efficacy. Even when multiple biocontrol agents are combined to create multistrain biocontrols, the resulting combinations can be less effective than the individual agents. One likely contributor is due to how multistrain microbial biocontrols are created. Multistrain microbial biocontrols are generally produced under controlled settings that are divorced from the ecological conditions they will need to function under. Traditionally, researchers culture, identify, and screen isolates for pathogen suppression traits. Then these researchers will combine the most promising isolates in an attempt to create more effective solutions. This approach, while effective for identifying suppressive isolates and determining the mechanisms of pathogen suppression, does not take into consideration the variability of natural environments, nor the complex ecological interactions that occur between plant hosts, pathogens, and component biocontrol agents, thus limiting the range of circumstances that these multistrain solutions can reliably succeed. To address these limitations, we suggest the application of relevant ecological theory to determine which isolates should be combined to create more reliable multistrain biocontrols. In this synthesis, we build on prior work focused on addressing plant pathogens through the use of multistrain microbial biocontrols, but we argue that viewing this work through the lens of ecology reveals key "design principles" from natural communities that are stable, functioning, and comprise multiple species.
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Affiliation(s)
- Gabriel Price-Christenson
- Department of Agricultural Microbiology, Earnest Agriculture, Rantoul, IL 61866
- Program in Ecology, Evolution, and Conservation Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801
| | - Anthony Yannarell
- Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801
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Du C, Yang D, Ye Y, Pan L, Zhang J, Jiang S, Fu G. Construction of a compound microbial agent for biocontrol against Fusarium wilt of banana. Front Microbiol 2022; 13:1066807. [PMID: 36605520 PMCID: PMC9807594 DOI: 10.3389/fmicb.2022.1066807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 12/05/2022] [Indexed: 12/24/2022] Open
Abstract
Banana wilt caused by Fusarium oxysporum f. sp. cubense has devastated a large number of banana plantations worldwide. Biological control is a possible method to conquer this disease. However, the control effect was often low and unstable while a single biocontrol strain had been applied in the field. Therefore, this study aimed to construct an effective compound microbial agent to control Fusarium wilt of banana (FWB) in the field. In addition to it, the compounding strategy of combining single strains for improving the control effect was investigated. Based on the compatibility test, five representative biocontrol strains were selected for the combination of all possible permutations. The pot experiment indicated that every biocontrol strain and their 26 combinations could control FWB to varying degrees. The control effect of combinations on FWB was higher than that of a single strain. In terms of the number of combinatorial biocontrol strains, the control effect of the four-strain combinations was the highest. According to the taxonomic differences of the five biocontrol strains, 26 biocontrol strain combinations could be divided into four groups. Among the strains in the combination, the larger the taxonomic differences the more easily it was to obtain a higher control effect. To obtain stable and efficient combinations, eight combinations were selected out and evaluated for their effectiveness in controlling FWB in different type soil. Compared with the other seven combinations, the four-strain combination T28 (Pt05 + Bc11 + Ba62 + gz-2) got the highest and stablest control effect in the four types of soil in greenhouse. And then the control effect of combination T28 was evaluated in field conditions, compared with commercially agents Bacillus subtilis, Trichoderma harzianum, and carbendazim. After four consecutive applications in the field, the control effect of T28 against FWB was the highest, reaching 57.14%. The results showed that combination T28 had a good application prospect, and the finding provided a reference for the construction of compound microbial agents.
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Affiliation(s)
- Chanjuan Du
- Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, China
| | - Di Yang
- Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, China
| | - Yunfeng Ye
- Horticultural Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, China
| | - Lianfu Pan
- Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, China
| | - Jin Zhang
- Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, China
| | - Shangbo Jiang
- Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, China
| | - Gang Fu
- Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, China
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12
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Sandilya SP, Jeevan B, Subrahmanyam G, Dutta K, Vijay N, Bhattacharyya N, Chutia M. Co-inoculation of native multi-trait plant growth promoting rhizobacteria promotes plant growth and suppresses Alternaria blight disease in Castor (Ricinus communis L.). Heliyon 2022; 8:e11886. [DOI: 10.1016/j.heliyon.2022.e11886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 09/11/2022] [Accepted: 11/17/2022] [Indexed: 11/27/2022] Open
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Combining Desirable Traits for a Good Biocontrol Strategy against Sclerotinia sclerotiorum. Microorganisms 2022; 10:microorganisms10061189. [PMID: 35744707 PMCID: PMC9228387 DOI: 10.3390/microorganisms10061189] [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: 05/05/2022] [Revised: 06/02/2022] [Accepted: 06/07/2022] [Indexed: 02/05/2023] Open
Abstract
The fungal pathogen Sclerotinia sclerotiorum (Helotiales: Sclerotiniaceae) causes white mold, a disease that leads to substantial losses on a wide variety of hosts throughout the world. This economically important fungus affects yield and seed quality, and its control mostly relies on the use of environmentally damaging fungicides. This review aimed to present the latest discoveries on microorganisms and the biocontrol mechanisms used against white mold. A special focus is put on the identification of biocontrol desirable traits required for efficient disease control. A better understanding of the mechanisms involved and the conditions required for their action is also essential to ensure a successful implementation of biocontrol under commercial field conditions. In this review, a brief introduction on the pathogen, its disease cycle, and its main pathogenicity factors is presented, followed by a thorough description of the microorganisms that have so far demonstrated biocontrol potential against white mold and the mechanisms they use to achieve control. Antibiosis, induced systemic resistance, mycoparasitism, and hypovirulence are discussed. Finally, based on our actual knowledge, the best control strategies against S. sclerotiorum that are likely to succeed commercially are discussed, including combining biocontrol desirable traits of particular interest.
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Macan GPF, Khalil S, Kalyandurg PB, Pareek N, Vetukuri RR. A Detached Leaf Assay for Rapidly Screening Plant Pathogen-Biological Control Agents. Methods Mol Biol 2022; 2536:449-458. [PMID: 35819620 DOI: 10.1007/978-1-0716-2517-0_26] [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] [Indexed: 06/15/2023]
Abstract
The detached leaf assay (DLA) is a nondestructive method for evaluating interactions between plants and disease-causing agents that allows quick characterization of potential pathogens' infectivity and plants' resistance to them. Here we show its utility for also assessing potential biological control agents (BCAs), by demonstrating its applicability for screening potential BCAs for the strawberry (Fragaria × ananassa) pathogen Phytophtora cactorum.
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Affiliation(s)
| | - Sammar Khalil
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences, Alnarp, Sweden
| | - Pruthvi B Kalyandurg
- Department of Plant Breeding, Swedish University of Agricultural Sciences, Alnarp, Sweden
| | - Nidhi Pareek
- Department of Microbiology, School of Life Sciences, Central University of Rajasthan, Bandarsindri, Kishangarh, Ajmer, Rajasthan, India
| | - Ramesh R Vetukuri
- Department of Plant Breeding, Swedish University of Agricultural Sciences, Alnarp, Sweden.
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Minchev Z, Kostenko O, Soler R, Pozo MJ. Microbial Consortia for Effective Biocontrol of Root and Foliar Diseases in Tomato. FRONTIERS IN PLANT SCIENCE 2021; 12:756368. [PMID: 34804094 PMCID: PMC8602810 DOI: 10.3389/fpls.2021.756368] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 10/04/2021] [Indexed: 05/26/2023]
Abstract
The use of beneficial microorganisms for the biological control of plant diseases and pests has emerged as a viable alternative to chemical pesticides in agriculture. Traditionally, microbe-based biocontrol strategies for crop protection relied on the application of single microorganisms. However, the design of microbial consortia for improving the reliability of current biological control practices is now a major trend in biotechnology, and it is already being exploited commercially in the context of sustainable agriculture. In the present study, exploiting the microbial library of the biocontrol company Koppert Biological Systems, we designed microbial consortia composed of carefully selected, well-characterized beneficial bacteria and fungi displaying diverse biocontrol modes of action. We compared their ability to control shoot and root pathogens when applied separately or in combination as microbial consortia, and across different application strategies that imply direct microbial antagonism or induced systemic plant resistance. We hypothesized that consortia will be more versatile than the single strains, displaying an extended functionality, as they will be able to control a wider range of plant diseases through diverse mechanisms and application methods. Our results confirmed our hypothesis, revealing that while different individual microorganisms were the most effective in controlling the root pathogen Fusarium oxysporum or the foliar pathogen Botrytis cinerea in tomato, the consortia showed an extended functionality, effectively controlling both pathogens under any of the application schemes, always reaching the same protection levels as the best performing single strains. Our findings illustrate the potential of microbial consortia, composed of carefully selected and compatible beneficial microorganisms, including bacteria and fungi, for the development of stable and versatile biological control products for plant protection against a wider range of diseases.
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Affiliation(s)
- Zhivko Minchev
- Business Unit Microbiology, Agronomical Development Department, Koppert Biological Systems, Berkel en Rodenrijs, Netherlands
| | - Olga Kostenko
- Business Unit Microbiology, Agronomical Development Department, Koppert Biological Systems, Berkel en Rodenrijs, Netherlands
| | - Roxina Soler
- Business Unit Microbiology, Agronomical Development Department, Koppert Biological Systems, Berkel en Rodenrijs, Netherlands
| | - María J. Pozo
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín, CSIC, Granada, Spain
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Leal C, Richet N, Guise JF, Gramaje D, Armengol J, Fontaine F, Trotel-Aziz P. Cultivar Contributes to the Beneficial Effects of Bacillus subtilis PTA-271 and Trichoderma atroviride SC1 to Protect Grapevine Against Neofusicoccum parvum. Front Microbiol 2021; 12:726132. [PMID: 34721323 PMCID: PMC8552030 DOI: 10.3389/fmicb.2021.726132] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 09/08/2021] [Indexed: 11/17/2022] Open
Abstract
Grapevine trunk diseases (GTDs) are a big threat for global viticulture. Without effective chemicals, biocontrol strategies are developed as alternatives to better cope with environmental concerns. A combination of biological control agents (BCAs) could even improve sustainable disease management through complementary ways of protection. In this study, we evaluated the combination of Bacillus subtilis (Bs) PTA-271 and Trichoderma atroviride (Ta) SC1 for the protection of Chardonnay and Tempranillo rootlings against Neofusicoccum parvum Bt67, an aggressive pathogen associated to Botryosphaeria dieback (BD). Indirect benefits offered by each BCA and their combination were then characterized in planta, as well as their direct benefits in vitro. Results provide evidence that (1) the cultivar contributes to the beneficial effects of Bs PTA-271 and Ta SC1 against N. parvum, and that (2) the in vitro BCA mutual antagonism switches to the strongest fungistatic effect toward Np-Bt67 in a three-way confrontation test. We also report for the first time the beneficial potential of a combination of BCA against Np-Bt67 especially in Tempranillo. Our findings highlight a common feature for both cultivars: salicylic acid (SA)-dependent defenses were strongly decreased in plants protected by the BCA, in contrast with symptomatic ones. We thus suggest that (1) the high basal expression of SA-dependent defenses in Tempranillo explains its highest susceptibility to N. parvum, and that (2) the cultivar-specific responses to the beneficial Bs PTA-271 and Ta SC1 remain to be further investigated.
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Affiliation(s)
- Catarina Leal
- University of Reims Champagne-Ardenne, Résistance Induite et Bioprotection des Plantes Research Unit, EA 4707, INRAE USC 1488, SFR Condorcet FR CNRS 3417, Reims, France
| | - Nicolas Richet
- University of Reims Champagne-Ardenne, Résistance Induite et Bioprotection des Plantes Research Unit, EA 4707, INRAE USC 1488, SFR Condorcet FR CNRS 3417, Reims, France
| | - Jean-François Guise
- University of Reims Champagne-Ardenne, Résistance Induite et Bioprotection des Plantes Research Unit, EA 4707, INRAE USC 1488, SFR Condorcet FR CNRS 3417, Reims, France
| | - David Gramaje
- Instituto de Ciencias de la Vid y del Vino, Consejo Superior de Investigaciones Científicas, Universidad de la Rioja, Gobierno de La Rioja, Logroño, Spain
| | - Josep Armengol
- Instituto Agroforestal Mediterráneo, Universitat Politècnica de València, Valencia, Spain
| | - Florence Fontaine
- University of Reims Champagne-Ardenne, Résistance Induite et Bioprotection des Plantes Research Unit, EA 4707, INRAE USC 1488, SFR Condorcet FR CNRS 3417, Reims, France
| | - Patricia Trotel-Aziz
- University of Reims Champagne-Ardenne, Résistance Induite et Bioprotection des Plantes Research Unit, EA 4707, INRAE USC 1488, SFR Condorcet FR CNRS 3417, Reims, France
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17
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Synergistic Effect between Trichoderma virens and Bacillus velezensis on the Control of Tomato Bacterial Wilt Disease. HORTICULTURAE 2021. [DOI: 10.3390/horticulturae7110439] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
(1) Background: Ralstonia solanacearum causes tomato bacterial wilt disease, one of the most serious tomato diseases. As the combination of Trichoderma virens (Tvien6) and Bacillus velezensis (X5) was more effective at controlling tomato bacterial wilt disease than a single agent, we investigated the synergistic effect of Tvien6 and X5 in controlling this disease; (2) Methods: The disease incidence, plant heights and weights, relative chlorophyll content (SPAD values), defensive enzymes (PPO, POD, and SOD) activities, and metabolome were estimated among four treatment groups (BR treatment, X5 + R. solanacearum (RS-15); TR treatment, Tvien6+ RS-15; TBR treatment, Tvien6 + X5 + RS-15; and R treatment, RS-15); (3) Results: The R treatment group had the highest disease incidence and lowest plant heights, plant weights, SPAD values, defensive enzyme activities, and D-fructose and D-glucose contents; the TBR treatment group had the lowest disease incidence and highest plant heights, plant weights, SPAD values, defensive enzyme activities, and D-fructose and D-glucose contents; (4) Conclusions: The results revealed that Tvien6 and X5 can both individually promote tomato plant growth, increase leaf chlorophyll content, enhance defensive enzyme activities, and induce the accumulation of D-fructose and D-glucose; however, they were more effective when combined.
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Yan W, Gao H, Qian X, Jiang Y, Zhou J, Dong W, Xin F, Zhang W, Jiang M. Biotechnological applications of the non-conventional yeast Meyerozyma guilliermondii. Biotechnol Adv 2020; 46:107674. [PMID: 33276074 DOI: 10.1016/j.biotechadv.2020.107674] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 10/31/2020] [Accepted: 11/25/2020] [Indexed: 12/11/2022]
Abstract
Unconventional yeasts have attracted increased attentions owning to their unique biochemical properties and potential application in the biotechnological process. With the rapid development of microbial isolation tools and synthetic biology, more promising industrial yeasts have been isolated and characterized. Meyerozyma guilliermondii (anamorph Candida guilliermondii) is an ascomycetous yeast with several unique characteristics and physiology, such as the wide substrates spectrum and capability of various chemicals synthesis. The potential physiological and metabolic capabilities of M. guilliermondii, which can utilize various carbon sources including typical hydrophilic and hydrophobic materials were first reviewed in this review. Moreover, the wide applications of M. guilliermondii, such as for industrial enzymes production, metabolites synthesis and biocontrol were also reviewed. With the development of system and synthetic biology, M. guilliermondii will provide new opportunities for potential applications in biotechnology sectors in the future.
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Affiliation(s)
- Wei Yan
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, PR China
| | - Hao Gao
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, PR China; Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, PR China
| | - Xiujuan Qian
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, PR China
| | - Yujia Jiang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, PR China
| | - Jie Zhou
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, PR China; Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, PR China
| | - Weiliang Dong
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, PR China; Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, PR China
| | - Fengxue Xin
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, PR China; Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, PR China.
| | - Wenming Zhang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, PR China; Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, PR China
| | - Min Jiang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, PR China; Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, PR China.
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Cell-Free Supernatants of Plant Growth-Promoting Bacteria: A Review of Their Use as Biostimulant and Microbial Biocontrol Agents in Sustainable Agriculture. SUSTAINABILITY 2020. [DOI: 10.3390/su12239917] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Plant growth-promoting bacteria (PGPB) afford plants several advantages (i.e., improvement of nutrient acquisition, growth, and development; induction of abiotic and biotic stress tolerance). Numerous PGPB strains have been isolated and studied over the years. However, only a few of them are available on the market, mainly due to the failed bacterial survival within the formulations and after application inside agroecosystems. PGPB strains with these challenging limitations can be used for the formulation of cell-free supernatants (CFSs), broth cultures processed through several mechanical and physical processes for cell removal. In the scientific literature there are diverse reviews and updates on PGPB in agriculture. However, no review deals with CFSs and the CFS metabolites obtainable by PGPB. The main objective of this review is to provide useful information for future research on CFSs as biostimulant and biocontrol agents in sustainable agriculture. Studies on CFS agricultural applications, both for biostimulant and biocontrol applications, have been reviewed, presenting limitations and advantages. Among the 109 articles selected and examined, the Bacillus genus seems to be the most promising due to the numerous articles that support its biostimulant and biocontrol potentialities. The present review underlines that research about this topic needs to be encouraged; evidence so far obtained has demonstrated that PGPB could be a valid source of secondary metabolites useful in sustainable agriculture.
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Nair AV, Leo Antony M, Praveen NK, Sayooj P, Raja Swaminathan T, Vijayan KK. Evaluation of in vitro and in vivo potential of Bacillus subtilis MBTDCMFRI Ba37 as a candidate probiont in fish health management. Microb Pathog 2020; 152:104610. [PMID: 33212198 DOI: 10.1016/j.micpath.2020.104610] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 07/20/2020] [Accepted: 11/09/2020] [Indexed: 01/09/2023]
Abstract
Bacillus subtilis MBTDCMFRI Ba37 (B. subtilis Ba37), an antibacterial strain isolated from the tropical estuarine habitats of Cochin, was evaluated for in vitro and in vivo potential, and its application as a candidate probiont in fish health management. B. subtilis Ba37 was characterized using their morphological and biochemical properties. It exhibited exoenzymatic activities, tolerance to various physiological conditions and a wide spectrum of antibacterial activity against aquaculture pathogens such as Vibrio and Aeromonas. In co-culture assay, B. subtilis Ba37 inhibited Vibrio anguillarum O1 (V. anguillarum O1) even with the initial cell count of 104 CFUmL-1. Cytotoxicity assay performed using the cell free supernatant (CFS) of B. subtilis Ba37 revealed its non toxic nature. A twenty one days of feeding trial was conducted in juveniles of Etroplus suratensis (E.suratensis) by administrating B. subtilis Ba37 to evaluate its efficacy on growth, immune parameters and antioxidant enzyme activities. Overall the supplementation of B. subtilis Ba37 enhanced significantly (P < 0.05) the survival rate, weight gain, specific growth (SGR), feed conversion ratio (FCR), protein efficiency ratio (PER), and feed efficiency (FE) of the fed animals as compared with the control. The immune parameters and antioxidant activities such as total protein, alkaline phosphatase (ALP), superoxide dismutase (SOD) and catalase were also improved significantly (P < 0.05) while serum alanine aminotransferase (SGOT) and serum aspartate aminotransferase (SGPT) activities were decreased slightly than the control. After fifteen days of challenge test, the fish fed with B. subtilis Ba37 showed higher relative percentage survival (RPS) than the control. Thus the study indicated the advantages of B. subtilis Ba37 to be used as a candidate probiont, which could be effectively utilized in managing diseases in aquaculture systems and to improve the health of the host.
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Affiliation(s)
- Anusree V Nair
- ICAR - Central Marine Fisheries Research Institute, Kerala, India
| | - M Leo Antony
- ICAR - Central Institute of Brackish Water Aquaculture, Chennai, India
| | - N K Praveen
- Department of Chemistry, NSS College Cherthala, Kerala, India
| | - P Sayooj
- ICAR - Central Marine Fisheries Research Institute, Kerala, India
| | - T Raja Swaminathan
- PMFGR Centre, ICAR-National Bureau of Fish Genetic Resources, Kerala, India
| | - K K Vijayan
- ICAR - Central Institute of Brackish Water Aquaculture, Chennai, India.
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21
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Biocontrol and Plant-Growth-Promoting Traits of Talaromyces apiculatus and Clonostachys rosea Consortium against Ganoderma Basal Stem Rot Disease of Oil Palm. Microorganisms 2020; 8:microorganisms8081138. [PMID: 32731441 PMCID: PMC7463586 DOI: 10.3390/microorganisms8081138] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 07/20/2020] [Accepted: 07/24/2020] [Indexed: 12/04/2022] Open
Abstract
Basal stem rot (BSR) disease caused by Ganoderma boninense basidiomycetous fungus is the most economically important disease in oil palms in South East Asia. Unfortunately, there is no single most effective control measure available. Tremendous efforts have been directed in incorporation of environmentally friendly biocontrol approaches in minimizing BSR disease. This study investigated the performance of two potential biocontrol agents (BCAs), AAT0115 and AAB0114 strains recovered from oil palm on suppression of BSR in planta, and also assessed their plant-growth-promoting (PGP) performance. ITS rRNA-sequence phylogeny discriminated the two ascomycetous Talaromyces apiculatus (Ta) AT0115 and Clonostachys rosea (Cr) AAB0114 biocontrol species with PGP characteristics. In vitro studies have demonstrated both Ta and Cr are capable of reducing linear mycelial growth of G. boninense. Inoculation of individual Cr and Ta—as well as Cr+Ta consortium—induced a significant increment in leaf area and bole girth of oil-palm seedlings five months post-inoculation (MPI) under nursery conditions. At five months post-inoculation, shoot and root biomass, and nutrient contents (nitrogen, phosphorus, potassium, calcium, magnesium and boron) were significantly higher in Ta-inoculated seedlings compared to control treated with non-Ta-inoculated maize. Chlorophyll and carotenoids contents in rapidly growing oil-palm seedlings challenged with Cr, Ta or a combination of both were not negatively affected. Cr, Ta and Cr+Ta consortium treated seedlings had 4.9–60% BSR disease reduction compared to the untreated control. Co-inoculation of Cr and Ta resulted in increased BSR control efficiencies by 18–26% (compared with Cr only) and 48–55% (compared with Ta only). Collectively, Cr and Ta, either individually or in consortium showed potential as BSR biocontrol agents while also possess PGP traits in oil palm.
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Rybakova D, Wikström M, Birch-Jensen F, Postma J, Ehlers RU, Schmuck M, Kollmann R, Köhl J, Berg G. Verticillium Wilt in Oilseed Rape-the Microbiome is Crucial for Disease Outbreaks as Well as for Efficient Suppression. PLANTS 2020; 9:plants9070866. [PMID: 32650549 PMCID: PMC7412322 DOI: 10.3390/plants9070866] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 07/03/2020] [Accepted: 07/06/2020] [Indexed: 12/17/2022]
Abstract
Microbiome management is a promising way to suppress verticillium wilt, a severe disease in Brassica caused by Verticillium longisporum. In order to improve current biocontrol strategies, we compared bacterial Verticillium antagonists in different assays using a hierarchical selection and evaluation scheme, and we integrated outcomes of our previous studies. The result was strongly dependent on the assessment method chosen (in vitro, in vivo, in situ), on the growth conditions of the plants and their genotype. The most promising biocontrol candidate identified was a Brassica endophyte Serratia plymuthica F20. Positive results were confirmed in field trials and by microscopically visualizing the three-way interaction. Applying antagonists in seed treatment contributes to an exceptionally low ecological footprint, supporting efficient economic and ecological solutions to controlling verticillium wilt. Indigenous microbiome, especially soil and seed microbiome, has been identified as key to understanding disease outbreaks and suppression. We suggest that verticillium wilt is a microbiome-driven disease caused by a reduction in microbial diversity within seeds and in the soil surrounding them. We strongly recommend integrating microbiome data in the development of new biocontrol and breeding strategies and combining both strategies with the aim of designing healthy microbiomes, thus making plants more resilient toward soil-borne pathogens.
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Affiliation(s)
- Daria Rybakova
- Graz University of Technology, Environmental Biotechnology, Petersgasse 12, 8010 Graz, Austria; (D.R.); (M.S.)
| | - Mariann Wikström
- Agro Plantarum AB, Kärrarpsvägen 410, S-265 90 Åstorp, Sweden; (M.W.); (F.B.-J.)
| | - Fia Birch-Jensen
- Agro Plantarum AB, Kärrarpsvägen 410, S-265 90 Åstorp, Sweden; (M.W.); (F.B.-J.)
| | - Joeke Postma
- Wageningen University & Research, 6708 PB Wageningen, Netherlands; (J.P.); (J.K.)
| | - Ralf Udo Ehlers
- E-nema GmbH, Klausdorfer Str. 28–36, 24223 Schwentinental, Germany;
| | - Maria Schmuck
- Graz University of Technology, Environmental Biotechnology, Petersgasse 12, 8010 Graz, Austria; (D.R.); (M.S.)
| | - René Kollmann
- Strateco OG, Ruckerlberggasse 13, 8010 Graz, Austria;
- Sekem Energy GmbH, Steinberg 132, 8151 Hitzendorf, Austria
| | - Jürgen Köhl
- Wageningen University & Research, 6708 PB Wageningen, Netherlands; (J.P.); (J.K.)
| | - Gabriele Berg
- Graz University of Technology, Environmental Biotechnology, Petersgasse 12, 8010 Graz, Austria; (D.R.); (M.S.)
- Correspondence: ; Tel.: +43-316-873-8819
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Navarta LG, Calvo J, Posetto P, Benuzzi D, Sanz MI. Freeze-drying of a mixture of bacterium and yeast for application in postharvest control of pathogenic fungi. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-3049-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Tian T, Reverdy A, She Q, Sun B, Chai Y. The role of rhizodeposits in shaping rhizomicrobiome. ENVIRONMENTAL MICROBIOLOGY REPORTS 2020; 12:160-172. [PMID: 31858707 DOI: 10.1111/1758-2229.12816] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 12/09/2019] [Accepted: 12/10/2019] [Indexed: 05/22/2023]
Abstract
Rhizomicrobiome, the communities of microorganisms surrounding the root of the plant, plays a vital role in promoting plant growth and health. The composition of rhizomicrobiome is dynamic both temporally and spatially, and is influenced greatly by the plant host and environmental factors. One of the key influencing factors is rhizodeposits, composed of root-released tissue cells, exudates, lysates, volatile compounds, etc. Rhizodeposits are rich in carbon and nitrogen elements, and able to select and fuel the growth of rhizomicrobiome. In this minireview, we overview the generation, composition and dynamics of rhizodeposits, and discuss recent work describing the general and specific impacts of rhizodeposits on rhizomicrobiome. We focus further on root exudates, the most dynamic component of rhizodeposits, and review recent progresses about the influence of specific root exudates in promoting bacterial root colonization, inducing biofilm development, acting as plant defence and shaping the rhizomicrobiome.
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Affiliation(s)
- Tao Tian
- Tianjin Academy of Agricultural Sciences, Institute of Plant Protection, Tianjin, China
- Department of Biology, Northeastern University, Boston, MA, USA
| | - Alicyn Reverdy
- Department of Biology, Northeastern University, Boston, MA, USA
| | - Qianxuan She
- Department of Biology, Northeastern University, Boston, MA, USA
| | - Bingbing Sun
- Tianjin Academy of Agricultural Sciences, Institute of Plant Protection, Tianjin, China
| | - Yunrong Chai
- Department of Biology, Northeastern University, Boston, MA, USA
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Zhimo VY, Biasi A, Kumar A, Feygenberg O, Salim S, Vero S, Wisniewski M, Droby S. Yeasts and Bacterial Consortia from Kefir Grains Are Effective Biocontrol Agents of Postharvest Diseases of Fruits. Microorganisms 2020; 8:microorganisms8030428. [PMID: 32197504 PMCID: PMC7143572 DOI: 10.3390/microorganisms8030428] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 03/17/2020] [Accepted: 03/18/2020] [Indexed: 02/06/2023] Open
Abstract
Fungal pathogens in fruits and vegetables cause significant losses during handling, transportation, and storage. Biological control with microbial antagonists replacing the use of chemical fungicides is a major approach in postharvest disease control, and several products based on single antagonists have been developed but have limitations related to reduced and inconsistent performance under commercial conditions. One possible approach to enhance the biocontrol efficacy is to broaden the spectrum of the antagonistic action by employing compatible microbial consortia. Here, we explore commercial kefir grains, a natural probiotic microbial consortium, by culture-dependent and metagenomic approaches and observed a rich diversity of co-existing yeasts and bacterial population. We report effective inhibition of the postharvest pathogen Penicillium expansum on apple by using the grains in its fresh commercial and milk-activated forms. We observed few candidate bacteria and yeasts from the kefir grains that grew together over successive enrichment cycles, and these mixed fermentation cultures showed enhanced biocontrol activities as compared to the fresh commercial or milk-activated grains. We also report several individual species of bacteria and yeasts with biocontrol activities against Penicillium rots on apple and grapefruit. These species with antagonistic properties could be further exploited to develop a synthetic consortium to achieve enhanced antagonistic effects against a wide range of postharvest pathogens.
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Affiliation(s)
- V. Yeka Zhimo
- Department of Postharvest Science, Agricultural Research Organization (ARO), The Volcani Center, Rishon LeZion 7505101, Israel
| | - Antonio Biasi
- Department of Postharvest Science, Agricultural Research Organization (ARO), The Volcani Center, Rishon LeZion 7505101, Israel
| | - Ajay Kumar
- Department of Postharvest Science, Agricultural Research Organization (ARO), The Volcani Center, Rishon LeZion 7505101, Israel
| | - Oleg Feygenberg
- Department of Postharvest Science, Agricultural Research Organization (ARO), The Volcani Center, Rishon LeZion 7505101, Israel
| | - Shoshana Salim
- Department of Postharvest Science, Agricultural Research Organization (ARO), The Volcani Center, Rishon LeZion 7505101, Israel
| | - Silvana Vero
- Área Microbiología, Departamento de Biociencias, Facultad de Química, Universidad de la República, Gral Flores 2124, Montevideo 11800, Uruguay
| | - Michael Wisniewski
- Appalachian Fruit Research Station, Agricultural Research Service, United States Department of Agriculture, Wiltshire Road, Kearneysville, WV 25443, USA
| | - Samir Droby
- Department of Postharvest Science, Agricultural Research Organization (ARO), The Volcani Center, Rishon LeZion 7505101, Israel
- Correspondence:
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Liu S, Oshita S, Thuyet DQ, Saito M, Yoshimoto T. Antioxidant Activity of Hydrogen Nanobubbles in Water with Different Reactive Oxygen Species both in Vivo and in Vitro. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:11878-11885. [PMID: 30189133 DOI: 10.1021/acs.langmuir.8b02440] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Hydrogen water as a new therapeutic antioxidant has been widely used in living organisms under stress. In this study, we applied nanobubble (NB) technology to hydrogen water. The antioxidant capacity of hydrogen NB water was studied with respect to different reactive oxygen species (ROS) both in vitro and in vivo. Using a relatively weak reduced dye, APF, we showed that hydrogen NB water can effectively remove three cytotoxic ROS, •OH, ClO-, and ONOO-, from water. Hydrogen NB water could also remove O2•-, which is a physiologically important ROS, from water. However, hydrogen water could not reduce other physiologically important ROS such as H2O2 and NO. At similar dissolved hydrogen concentrations, hydrogen NB water displayed higher antioxidant activity than hydrogen water without NB. Barley seed germination tests were used to study the antioxidant effect of hydrogen NB water on ROS generation in vivo. Our results showed that this decreased the physiological activity of barley seeds in their normal homeostatic state. Hydrogen NB water eliminated endogenous O2•- in seeds and inhibited germination. The usage of hydrogen NB water should be individually considered according to the types of cells involved. Our results offer basic data concerning the application of hydrogen NB water in different fields.
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Affiliation(s)
- Shu Liu
- Department of Environmental Science and Engineering, School of Space and Environment , Beihang University , Beijing 100191 , China
- Graduate School of Agricultural & Life Sciences , The University of Tokyo , Yayoi 1-1-1 , Bunkyo-ku, Tokyo 113-8657 , Japan
| | - Seiichi Oshita
- Graduate School of Agricultural & Life Sciences , The University of Tokyo , Yayoi 1-1-1 , Bunkyo-ku, Tokyo 113-8657 , Japan
| | - Dang Quoc Thuyet
- Graduate School of Agricultural & Life Sciences , The University of Tokyo , Yayoi 1-1-1 , Bunkyo-ku, Tokyo 113-8657 , Japan
| | - Masanao Saito
- Graduate School of Agricultural & Life Sciences , The University of Tokyo , Yayoi 1-1-1 , Bunkyo-ku, Tokyo 113-8657 , Japan
| | - Takahiko Yoshimoto
- Graduate School of Agricultural & Life Sciences , The University of Tokyo , Yayoi 1-1-1 , Bunkyo-ku, Tokyo 113-8657 , Japan
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Yi Y, Frenzel E, Spoelder J, Elzenga JTM, van Elsas JD, Kuipers OP. Optimized fluorescent proteins for the rhizosphere-associated bacterium Bacillus mycoides with endophytic and biocontrol agent potential. ENVIRONMENTAL MICROBIOLOGY REPORTS 2018; 10:57-74. [PMID: 29195004 DOI: 10.1111/1758-2229.12607] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 11/23/2017] [Indexed: 06/07/2023]
Abstract
Tracking of fluorescent protein (FP)-labelled rhizobacteria is a key prerequisite to gain insights into plant-bacteria interaction mechanisms. However, the performance of FPs mostly has to be optimized for the bacterial host and for the environment of intended application. We report on the construction of mutational libraries of the superfolder green fluorescent protein sfGFP and the red fluorescent protein mKate2 in the bacterium B. mycoides, which next to its potential as plant-biocontrol agent occasionally enters an endophytic lifestyle. By fluorescence-activated cell sorting and comparison of signal intensities at the colony and single-cell level, the variants sfGFP(SPS6) and mKate (KPS12) with significantly increased brightness were isolated. Their high applicability for plant-bacteria interaction studies was shown by confocal laser scanning microscopy tracking of FP-tagged B. mycoides strains after inoculation to Chinese cabbage plants in a hydroponic system. During the process of colonization, strain EC18 rapidly attached to plant roots and formed a multicellular matrix, especially at the branching regions of the root hair, which probably constitute entrance sites to establish an endophytic lifestyle. The universal applicability of the novels FPs was proven by expression from a weak promoter, dual-labelling of B. mycoides, and by excellent expression and detectability in additional soil- and rhizosphere-associated Bacillus species.
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Affiliation(s)
- Yanglei Yi
- Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
| | - Elrike Frenzel
- Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
| | - Jan Spoelder
- Plant Physiology, Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, The Netherlands
| | - J Theo M Elzenga
- Plant Physiology, Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, The Netherlands
| | - Jan Dirk van Elsas
- Microbial Ecology, Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, The Netherlands
| | - Oscar P Kuipers
- Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
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Elsheshtawi M, Elkhaky MT, Sayed SR, Bahkali AH, Mohammed AA, Gambhir D, Mansour AS, Elgorban AM. Integrated control of white rot disease on beans caused by Sclerotinia sclerotiorum using Contans® and reduced fungicides application. Saudi J Biol Sci 2017; 24:405-409. [PMID: 28149180 PMCID: PMC5272945 DOI: 10.1016/j.sjbs.2016.01.038] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 01/12/2016] [Accepted: 01/15/2016] [Indexed: 11/22/2022] Open
Abstract
This study was conducted to determine the compatibility of Contans® (Coniothyrium minitans) with fungicides against Sclerotinia sclerotiorum. Results showed that both Contans® and Topsin® significantly reduced the disease incidence caused by S. sclerotiorum by 90% and 95% survival plants, respectively when they were individually applied and compared to control. While, soil application of Contans® and Sumisclex mixture was the most effective in suppressing the white rot disease incidence that produced 100% survival plants, application of C. minitans combined with the reduced doses of fungicides would be advantageous in saving labor cost, thus increasing production efficiency of bean.
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Affiliation(s)
- Mohamed Elsheshtawi
- Plant Pathology Department, Faculty of Agriculture, Mansoura University, Mansoura 35516, Egypt
| | - Maged T. Elkhaky
- Plant Pathology Department, Faculty of Agriculture, Mansoura University, Mansoura 35516, Egypt
- Plant Pathology Department, Institute of Food and Agricultural Sciences (IFAS), University of Florida, Gainesville, USA
| | - Shaban R. Sayed
- Zoology Department, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia
| | - Ali H. Bahkali
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Arif A. Mohammed
- Center of Excellence in Biotechnology Research, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Dikshit Gambhir
- Center of Excellence in Biotechnology Research, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Aref S. Mansour
- Plant Pathology Research Institute, Agricultural Research Center, Giza, Egypt
| | - Abdallah M. Elgorban
- Plant Pathology Department, Faculty of Agriculture, Mansoura University, Mansoura 35516, Egypt
- Center of Excellence in Biotechnology Research, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
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Raza W, Ling N, Zhang R, Huang Q, Xu Y, Shen Q. Success evaluation of the biological control of Fusarium wilts of cucumber, banana, and tomato since 2000 and future research strategies. Crit Rev Biotechnol 2016; 37:202-212. [DOI: 10.3109/07388551.2015.1130683] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Waseem Raza
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Utilization, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu Province, P. R. China
| | - Ning Ling
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Utilization, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu Province, P. R. China
| | - Ruifu Zhang
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Utilization, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu Province, P. R. China
| | - Qiwei Huang
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Utilization, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu Province, P. R. China
| | - Yangchun Xu
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Utilization, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu Province, P. R. China
| | - Qirong Shen
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Utilization, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu Province, P. R. China
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Modelling the dynamics of a plant pathogen and a biological control agent in relation to flowering pattern and populations present on leaves. Ecol Modell 2015. [DOI: 10.1016/j.ecolmodel.2015.06.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Bardin M, Ajouz S, Comby M, Lopez-Ferber M, Graillot B, Siegwart M, Nicot PC. Is the efficacy of biological control against plant diseases likely to be more durable than that of chemical pesticides? FRONTIERS IN PLANT SCIENCE 2015; 6:566. [PMID: 26284088 PMCID: PMC4515547 DOI: 10.3389/fpls.2015.00566] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 07/09/2015] [Indexed: 05/18/2023]
Abstract
The durability of a control method for plant protection is defined as the persistence of its efficacy in space and time. It depends on (i) the selection pressure exerted by it on populations of plant pathogens and (ii) on the capacity of these pathogens to adapt to the control method. Erosion of effectiveness of conventional plant protection methods has been widely studied in the past. For example, apparition of resistance to chemical pesticides in plant pathogens or pests has been extensively documented. The durability of biological control has often been assumed to be higher than that of chemical control. Results concerning pest management in agricultural systems have shown that this assumption may not always be justified. Resistance of various pests to one or several toxins of Bacillus thuringiensis and apparition of resistance of the codling moth Cydia pomonella to the C. pomonella granulovirus have, for example, been described. In contrast with the situation for pests, the durability of biological control of plant diseases has hardly been studied and no scientific reports proving the loss of efficiency of biological control agents against plant pathogens in practice has been published so far. Knowledge concerning the possible erosion of effectiveness of biological control is essential to ensure a durable efficacy of biological control agents on target plant pathogens. This knowledge will result in identifying risk factors that can foster the selection of strains of plant pathogens resistant to biological control agents. It will also result in identifying types of biological control agents with lower risk of efficacy loss, i.e., modes of action of biological control agents that does not favor the selection of resistant isolates in natural populations of plant pathogens. An analysis of the scientific literature was then conducted to assess the potential for plant pathogens to become resistant to biological control agents.
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Affiliation(s)
- Marc Bardin
- Plant Pathology Unit, Institut National de la Recherche Agronomique, UR407, Montfavet, France
| | - Sakhr Ajouz
- Plant Pathology Unit, Institut National de la Recherche Agronomique, UR407, Montfavet, France
| | - Morgane Comby
- Plant Pathology Unit, Institut National de la Recherche Agronomique, UR407, Montfavet, France
| | - Miguel Lopez-Ferber
- Laboratoire de Génie de l’Environnement Industriel, Ecole des Mines d’Alès, Institut Mines-Telecom, Alès, France
| | - Benoît Graillot
- Laboratoire de Génie de l’Environnement Industriel, Ecole des Mines d’Alès, Institut Mines-Telecom, Alès, France
- Natural Plant Protection,Arysta LifeScience Group, Pau, France
| | - Myriam Siegwart
- Plantes et Systèmes de Culture Horticoles Unit, Institut National de la Recherche Agronomique, UR1115, Avignon, France
| | - Philippe C. Nicot
- Plant Pathology Unit, Institut National de la Recherche Agronomique, UR407, Montfavet, France
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Tian T, Li SD, Sun MH. Synergistic Effect of Dazomet Soil Fumigation and Clonostachys rosea Against Cucumber Fusarium Wilt. PHYTOPATHOLOGY 2014; 104:1314-1321. [PMID: 24941326 DOI: 10.1094/phyto-11-13-0297-r] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Soil fumigation and biological control are two control measures frequently used against soilborne diseases. In this study, the chemical fumigant dazomet was applied in combination with the biocontrol agent (BCA) Clonostachys rosea 67-1 to combat cucumber wilt caused by Fusarium oxysporum f. sp. cucumerinum KW2-1. When the mycoparasite C. rosea 67-1 was applied after dazomet fumigation, disease control reached 100%, compared with 88.1 and 69.8% for dazomet and 67-1 agent, respectively, applied alone, indicating a synergistic effect of dazomet and C. rosea in combating cucumber Fusarium wilt based on analysis of Bliss Independence. To understand the synergistic mechanism, the effects of chemical fumigation on the colonization potential and activity of F. oxysporum f. sp. cucumerinum, and the interaction between the BCA and the pathogen were investigated. The results showed that growth of the pathogen decreased with increasing dazomet concentration subsequent to fumigation. When exposed to dazomet at 100 ppm, the fungal sporulation rate decreased by 94.4%. Severe damage was observed in fumigated isolates using scanning electron microscopy. In the greenhouse, disease incidence of cucumber caused by fumigated F. oxysporum f. sp. cucumerinum significantly decreased. Whereas germination of C. rosea 67-1 spores increased by >sixfold in fumigated soil, and its ability to parasitize fumigated F. oxysporum f. sp. cucumerinum significantly increased (P = 0.014).
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Lahlali R, Hamadi Y, Drider R, Misson C, El Guilli M, Jijakli MH. Control of citrus blue mold by the antagonist yeast Pichia guilliermondii Z1: Compatibility with commercial fruit waxes and putative mechanisms of action. Food Control 2014. [DOI: 10.1016/j.foodcont.2014.04.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Weiland JE. Pythium Species and Isolate Diversity Influence Inhibition by the Biological Control Agent Streptomyces lydicus. PLANT DISEASE 2014; 98:653-659. [PMID: 30708563 DOI: 10.1094/pdis-05-13-0482-re] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Disease control of soilborne pathogens by biological control agents (BCAs) is often inconsistent under field conditions. This inconsistency may be partly influenced by pathogen diversity if there is a differential response among pathogen species and isolates to selected BCAs. The responses of 148 Pythium isolates obtained from soil at three forest nurseries and representative of 16 Pythium spp. were evaluated in the presence of Streptomyces lydicus strain WYEC108 in an in vitro assay. Percent growth inhibition, inhibition zone distance, mortality, and growth rate were recorded for each isolate, and data were analyzed for effects of species and isolate. Responses of three Pythium spp. (Pythium irregulare, P. sylvaticum, and P. ultimum) were further analyzed for a location (nursery) effect. Although S. lydicus inhibited all Pythium isolates, differences in percent growth inhibition, inhibition zone distance, and mortality were observed among Pythium spp. and isolates. Small but significant location effects were also noted. Growth rate also varied among Pythium spp. and isolates and was found to strongly bias percent growth inhibition and, to a lesser degree, inhibition zone distance; depending on which measure was used, slower-growing isolates appeared less sensitive (growth inhibition) or more sensitive (inhibition zone) to S. lydicus than faster-growing isolates. Results illustrate the importance of using multiple, representative pathogen isolates in preliminary BCA inhibition assays as well as accounting for the effect of pathogen growth rate on pathogen inhibition by BCAs. Future studies should take pathogen diversity into account when evaluating biological control efficacy.
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Affiliation(s)
- Jerry E Weiland
- United States Department of Agriculture-Agriculture Research Service, Horticultural Crops Research Laboratory, and Oregon State University, Department of Botany and Plant Pathology, Corvallis 97331
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Gerbore J, Benhamou N, Vallance J, Le Floch G, Grizard D, Regnault-Roger C, Rey P. Biological control of plant pathogens: advantages and limitations seen through the case study of Pythium oligandrum. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:4847-60. [PMID: 23695856 DOI: 10.1007/s11356-013-1807-6] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2013] [Accepted: 05/06/2013] [Indexed: 04/15/2023]
Abstract
The management of certain plant beneficial microorganisms [biological control agents (BCAs)] seems to be a promising and environmental friendly method to control plant pathogens. However, applications are still limited because of the lack of consistency of BCAs when they are applied in the field. In the present paper, the advantages and limitations of BCAs are seen through the example of Pythium oligandrum, an oomycete that has received much attention in the last decade. The biological control exerted by P. oligandrum is the result of a complex process, which includes direct effects through the control of pathogens and/or indirect effects mediated by P. oligandrum, i.e. induction of resistance and growth promotion. P. oligandrum antagonism is a multifaceted and target fungus-dependent process. Interestingly, it does not seem to disrupt microflora biodiversity on the roots. P. oligandrum has an atypical relationship with the plant because it rapidly penetrates into the root tissues but it cannot stay alive in planta. After root colonisation, because of the elicitation by P. oligandrum of the plant-defence system, plants are protected from a range of pathogens. The management of BCAs, here P. oligandrum, is discussed with regard to its interactions with the incredibly complex agrosystems.
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Affiliation(s)
- J Gerbore
- INRA, ISVV, UMR1065 Santé et Agroécologie du Vignoble (SAVE), 33140, Villenave d'Ornon, France
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Alamri SA. The synergistic effect of two formulated biofungicides in the biocontrol of root and bottom rot of lettuce. Biocontrol Sci 2014; 19:189-97. [PMID: 25744215 DOI: 10.4265/bio.19.189] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
The aim of this study was to evaluate the synergistic effect of two formulated biofungicides (Rhizoleen-T and Rhizoleen-B) in the suppression of root and bottom rot of lettuce caused by Rhizoctonia solani, as well as the consequent effect on the phytosanitarian status of the plants.The results proved that application of the biofungicides either singly or in combination increased the germination and survival of the lettuce up to 61.67% and 100%, respectively. The phytosanitarian status of the plants, which was indicated by morphological and physiological parameters, was improved as the result of the application of the biofungicides. The noteworthy valuable result was the increase in fresh weight by 52.5% of the control when the two biofungicides were applied as a mixture. Interestingly, the mixture of the two biofungicides brought about a significant increase in most parameters compared to either of them in single preparation. Proline and phenols significantly increased as a result of the application of the biofungicides compared to the control. This means that the treated plants were more resistant against the pathogens. The study concludes that application of the biofungicides protects the lettuce plants against root and bottom rot, and in addition they increase the strength of the defense system of the plants. It is recommended that the application of a biofungicide mixture is a good and effective strategy in the biocontrol of plant diseases.
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Affiliation(s)
- Saad A Alamri
- Biology Department, Faculty of Science, King Khalid University
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Xu XM, Jeger MJ. Theoretical modeling suggests that synergy may result from combined use of two biocontrol agents for controlling foliar pathogens under spatial heterogeneous conditions. PHYTOPATHOLOGY 2013; 103:768-775. [PMID: 23617339 DOI: 10.1094/phyto-10-12-0266-r] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
There has been a trend for combined use of several biocontrol agents (BCAs) with an expectation of synergistic interactions among BCAs. However, previous modeling studies suggested that, under homogeneous and temporal-fluctuating conditions, combined use of two BCAs, in most cases, only results in efficacies similar to the more efficacious one used alone; a result consistent with published experimental data. The present modeling study investigated whether combined use of two mycoparasitic BCAs, two competitive BCAs, or a mycoparasitic and a competitive BCA leads to synergistic interactions under spatially heterogeneous conditions. In the model, there were two patches with varying relative sizes and two BCAs differentially adapted to the two patches. Within the range of model parameter values considered, combined use of two BCAs is more effective than the more efficacious BCA used alone in 72% of the simulated cases. There was also a considerable proportion (≈21%) of model simulations in which combined use of two BCAs led to synergy (i.e., efficacy was greater than expected under the assumption of Bliss independence, especially when each of the two BCAs can only survive in one [different] patch). Combined use of a mycoparasitic BCA with a competitive one is more likely to result in synergy than the other two BCA combinations. When biocontrol activities of individual BCAs are low or moderate, biocontrol efficacy arising from combined use of two BCAs does not depend greatly on biocontrol mechanisms. However, for high BCA activities, combined use with at least one competitive BCA resulted in better control than combined use of two mycoparasitic BCAs. The present modeling study emphasized the need for understanding the degree of spatial patchiness and quantitative relationships between biocontrol activities and external conditions in order to apply commercial BCAs effectively.
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Affiliation(s)
- X-M Xu
- Northwest A & F University, Shaanxi, China
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40
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Wang C, Lin Y, Lin Y, Chung W. Modified primers for the identification of nonpathogenic Fusarium oxysporum isolates that have biological control potential against Fusarium wilt of cucumber in Taiwan. PLoS One 2013; 8:e65093. [PMID: 23762289 PMCID: PMC3676385 DOI: 10.1371/journal.pone.0065093] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Accepted: 04/21/2013] [Indexed: 11/24/2022] Open
Abstract
Previous investigations demonstrated that Fusarium oxysporum (Fo), which is not pathogenic to cucumbers, could serve as a biological control agent for managing Fusarium wilt of cucumber caused by Fo f. sp. cucumerinum (Foc) in Taiwan. However, thus far it has not been possible to separate the populations of pathogenic Fo from the nonpathogenic isolates that have biological control potential through their morphological characteristics. Although these two populations can be distinguished from one another using a bioassay, the work is laborious and time-consuming. In this study, a fragment of the intergenic spacer (IGS) region of ribosomal DNA from an Fo biological control agent, Fo366, was PCR-amplified with published general primers, FIGS11/FIGS12 and sequenced. A new primer, NPIGS-R, which was designed based on the IGS sequence, was paired with the FIGS11 primer. These primers were then evaluated for their specificity to amplify DNA from nonpathogenic Fo isolates that have biological control potential. The results showed that the modified primer pair, FIGS11/NPIGS-R, amplified a 500-bp DNA fragment from five of seven nonpathogenic Fo isolates. These five Fo isolates delayed symptom development of cucumber Fusarium wilt in greenhouse bioassay tests. Seventy-seven Fo isolates were obtained from the soil and plant tissues and then subjected to amplification using the modified primer pair; six samples showed positive amplification. These six isolates did not cause symptoms on cucumber seedlings when grown in peat moss infested with the isolates and delayed disease development when the same plants were subsequently inoculated with a virulent isolate of Foc. Therefore, the modified primer pair may prove useful for the identification of Fo isolates that are nonpathogenic to cucumber which can potentially act as biocontrol agents for Fusarium wilt of cucumber.
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Affiliation(s)
- Chaojen Wang
- Department of Plant Pathology, National Chung Hsing University, Taichung, Taiwan
| | - Yisheng Lin
- Department of Biotechnology, Asia University, Wufeng, Taichung, Taiwan
| | - Yinghong Lin
- Department of Plant Pathology, National Chung Hsing University, Taichung, Taiwan
| | - Wenhsin Chung
- Department of Plant Pathology, National Chung Hsing University, Taichung, Taiwan
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Lutz MC, Lopes CA, Rodriguez ME, Sosa MC, Sangorrín MP. Efficacy and putative mode of action of native and commercial antagonistic yeasts against postharvest pathogens of pear. Int J Food Microbiol 2013; 164:166-72. [DOI: 10.1016/j.ijfoodmicro.2013.04.005] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Revised: 03/26/2013] [Accepted: 04/08/2013] [Indexed: 11/25/2022]
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Papon N, Savini V, Lanoue A, Simkin AJ, Crèche J, Giglioli-Guivarc'h N, Clastre M, Courdavault V, Sibirny AA. Candida guilliermondii: biotechnological applications, perspectives for biological control, emerging clinical importance and recent advances in genetics. Curr Genet 2013; 59:73-90. [PMID: 23616192 DOI: 10.1007/s00294-013-0391-0] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2013] [Revised: 03/28/2013] [Accepted: 04/02/2013] [Indexed: 12/11/2022]
Abstract
Candida guilliermondii (teleomorph Meyerozyma guilliermondii) is an ascomycetous species belonging to the Saccharomycotina CTG clade which has been studied over the last 40 years due to its biotechnological interest, biological control potential and clinical importance. Such a wide range of applications in various areas of fundamental and applied scientific research has progressively made C. guilliermondii an attractive model for exploring the potential of yeast metabolic engineering as well as for elucidating new molecular events supporting pathogenicity and antifungal resistance. All these research fields now take advantage of the establishment of a useful molecular toolbox specifically dedicated to C. guilliermondii genetics including the construction of recipient strains, the development of selectable markers and reporter genes and optimization of transformation protocols. This area of study is further supported by the availability of the complete genome sequence of the reference strain ATCC 6260 and the creation of numerous databases dedicated to gene ontology annotation (metabolic pathways, virulence, and morphogenesis). These genetic tools and genomic resources represent essential prerequisites for further successful development of C. guilliermondii research in medical mycology and in biological control by facilitating the identification of the multiple factors that contribute to its pathogenic potential. These genetic and genomic advances should also expedite future practical uses of C. guilliermondii strains of biotechnological interest by opening a window into a better understanding of the biosynthetic pathways of valuable metabolites.
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Affiliation(s)
- Nicolas Papon
- EA2106, Biomolécules et Biotechnologies Végétales, Faculté de Pharmacie, Université François-Rabelais de Tours, Tours, France.
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Akhtar MS, Panwar J. Efficacy of root-associated fungi and PGPR on the growth of Pisum sativum (cv. Arkil) and reproduction of the root-knot nematode Meloidogyne incognita. J Basic Microbiol 2013; 53:318-26. [PMID: 22915081 DOI: 10.1002/jobm.201100610] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Accepted: 04/30/2012] [Indexed: 11/11/2022]
Abstract
The effects of root-associated fungi (Aspergillus awamori and Glomus mosseae) and plant growth promoting rhizobacteria (PGPR) (Pseudomonas putida, Pseudomonas alcaligenes and Paenibacillus polymyxa) were studied alone and in combination in glasshouse experiments on the growth of pea, enzyme activity (peroxidase and catalase) and reproduction of root-knot nematode Meloidogyne incognita. Application of A. awamori, G. mosseae and PGPR caused a significant increase in pea growth and enzyme activities of both nematode inoculated and uninoculated plants. A. awamori was more effective in reducing galling and improving the growth of nematode inoculated plants than P. alcaligenes or P. polymyxa. The greatest increase in growth, enzyme activities of nematode-inoculated plants and reduction in galling and nematode multiplication was observed when A. awamori was used with P. putida or G. mosseae as compared to the other combinations tested. Percentage root colonization was higher when AM fungus inoculated plants were treated with P. putida both in presence and absence of nematode.
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Affiliation(s)
- Mohd Sayeed Akhtar
- Department of Biology, College of Natural Sciences, Jimma University, Jimma, Ethiopia.
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Xu XM, Jeger MJ. Combined use of two biocontrol agents with different biocontrol mechanisms most likely results in less than expected efficacy in controlling foliar pathogens under fluctuating conditions: a modeling study. PHYTOPATHOLOGY 2013; 103:108-116. [PMID: 23095466 DOI: 10.1094/phyto-07-12-0167-r] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Effective use of biocontrol agents (BCAs) is a potentially important component of sustainable agriculture; recently, there has been a trend for combined use of several BCAs, with an expectation of synergistic interactions among them. A previous numerical study suggested that, under homogenous conditions in which two BCAs occupied the same host tissue as the pathogen, combined use of two BCAs with different biocontrol mechanisms resulted, in most cases, in efficacies similar to using the more efficacious one alone; this result is consistent with published experimental results. The present study investigates whether combined use of a mycoparasitic and a competitive BCA leads to greater efficacy than that expected when the model is modified to allow for fluctuating temperature regimes and the effects of temperature on the pathogen and BCAs. Within the range of parameter values considered, combined use of two BCAs is shown to be less effective than that expected under the assumption of Bliss independence, and to result in a level of efficacy similar to that achieved by the more efficacious component used alone, indicating antagonistic interactions between the two BCAs. Nevertheless, combined use of two BCAs resulted in a slightly longer delay in epidemic development than did individual use of BCAs. Stochastic variability in simulated hourly temperatures did not result in a high level of variability in efficacy among replicates; nevertheless, the among-replicate variability appeared to be greater for the combined use of BCAs than for individual BCAs used alone. In contrast, there were greater effects of varying BCA-temperature relationships and application time (reflected in the temperature profile) on efficacy, suggesting the importance of characterizing the relationship between BCA activity and environmental conditions in future research.
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Affiliation(s)
- X-M Xu
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China.
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Otto-Hanson LK, Grabau Z, Rosen C, Salomon CE, Kinkel LL. Pathogen variation and urea influence selection and success of Streptomyces mixtures in biological control. PHYTOPATHOLOGY 2013; 103:34-42. [PMID: 23035630 DOI: 10.1094/phyto-06-12-0129-r] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Success in biological control of plant diseases remains inconsistent in the field. A collection of well-characterized Streptomyces antagonists (n = 19 isolates) was tested for their capacities to inhibit pathogenic Streptomyces scabies (n = 15 isolates). There was significant variation among antagonists in ability to inhibit pathogen isolates and among pathogens in their susceptibility to inhibition. Only one antagonist could inhibit all pathogens, and antagonist-pathogen interactions were highly specific, highlighting the limitations of single-strain inoculum in biological control. However, the collection of pathogens could be inhibited by several combinations of antagonists, suggesting the potential for successful antagonist mixtures. Urea generally increased effectiveness of antagonists at inhibiting pathogens in vitro (increased mean inhibition zones) but its specific effects varied among antagonist-pathogen combinations. In greenhouse trials, urea enhanced the effectiveness of antagonist mixtures relative to individual antagonists in controlling potato scab. Although antagonist mixtures were frequently antagonistic in the absence of urea, all n= 2 and n = 3 antagonist-isolate combinations were synergistic in the presence of urea. This work provides insights into the efficacy of single- versus multiple-strain inocula in biological control and on the potential for nutrients to influence mixture success.
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Affiliation(s)
- L K Otto-Hanson
- Department of Plant Pathology, University of Minnesota, St. Paul 55108, USA.
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Triveni S, Prasanna R, Shukla L, Saxena AK. Evaluating the biochemical traits of novel Trichoderma-based biofilms for use as plant growth-promoting inoculants. ANN MICROBIOL 2012. [DOI: 10.1007/s13213-012-0573-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Benhamou N, le Floch G, Vallance J, Gerbore J, Grizard D, Rey P. Pythium oligandrum: an example of opportunistic success. Microbiology (Reading) 2012; 158:2679-2694. [DOI: 10.1099/mic.0.061457-0] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Affiliation(s)
- Nicole Benhamou
- Centre de recherche en horticulture, Pavillon de l’ENVIROTRON, 2480 Boulevard Hochelga, Université Laval, QC G1V 0A6, Canada
| | - Gaêtan le Floch
- Université Européenne de Bretagne/Université de Brest, Laboratoire Universitaire de Biodiversité et Ecologie Microbienne, ESMISAB, 29 820 Plouzané, France
| | - Jessica Vallance
- Université de Bordeaux, ISVV, UMR1065 Santé et Agroécologie du Vignoble (SAVE), Bordeaux Sciences Agro, F-33140, Villenave d’Ornon, France et INRA, ISVV, UMR1065 SAVE, F-33140, Villenave d’Ornon, France
| | - Jonathan Gerbore
- Université de Bordeaux, ISVV, UMR1065 Santé et Agroécologie du Vignoble (SAVE), Bordeaux Sciences Agro, F-33140, Villenave d’Ornon, France et INRA, ISVV, UMR1065 SAVE, F-33140, Villenave d’Ornon, France
| | | | - Patrice Rey
- Université de Bordeaux, ISVV, UMR1065 Santé et Agroécologie du Vignoble (SAVE), Bordeaux Sciences Agro, F-33140, Villenave d’Ornon, France et INRA, ISVV, UMR1065 SAVE, F-33140, Villenave d’Ornon, France
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Meng QX, Jiang HH, Hanson LE, Hao JJ. Characterizing a novel strain of Bacillus amyloliquefaciens BAC03 for potential biological control application. J Appl Microbiol 2012; 113:1165-75. [PMID: 22924833 DOI: 10.1111/j.1365-2672.2012.05420.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Revised: 06/21/2012] [Accepted: 07/30/2012] [Indexed: 11/27/2022]
Abstract
AIMS To identify and characterize a bacterial strain BAC03, evaluate its biological control activity against potato common scab (Streptomyces spp.) and characterize an antimicrobial substance produced by BAC03. METHODS AND RESULTS Bacterial strain BAC03, isolated from potato common scab suppressive soil, was identified as Bacillus amyloliquefaciens by analysing sequences of fragments of the recA, recN, cheA and gyrA genes. BAC03 displayed an antagonistic activity against Streptomyces spp. on agar plates using a co-culture method. In glasshouse assays, BAC03 applied in potting mix significantly reduced common scab severity (P < 0·05) and potentially increased the growth of potato plants (P < 0·05). An antimicrobial substance extracted from BAC03 by ammonium sulfate precipitation was identified as an LCI protein using liquid chromatography-mass spectrometry. The antimicrobial activity of either a BAC03 liquid culture or the ammonium sulfate precipitate fraction was stable under a wide range of temperatures, and pH levels, as well as following incubation with several chemicals, but was reduced by all proteinases tested. CONCLUSIONS Bacillus amyloliquefaciens strain BAC03 displayed a strong antimicrobial activity, that is, the suppression of potato common scab, and may potentially enhance the plant growth. LCI protein is associated with some of the antimicrobial activity. SIGNIFICANCE AND IMPACT OF THE STUDY Bacterial strain BAC03 has the potential to be developed as a commercial biological control agent for potato common scab.
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Affiliation(s)
- Q X Meng
- Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI, USA
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Optimization of conditions for in vitro development of Trichoderma viride-based biofilms as potential inoculants. Folia Microbiol (Praha) 2012; 57:431-7. [DOI: 10.1007/s12223-012-0154-1] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2011] [Accepted: 04/20/2012] [Indexed: 11/30/2022]
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50
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Xu XM, Jeffries P, Pautasso M, Jeger MJ. A numerical study of combined use of two biocontrol agents with different biocontrol mechanisms in controlling foliar pathogens. PHYTOPATHOLOGY 2011; 101:1032-1044. [PMID: 21385011 DOI: 10.1094/phyto-10-10-0267] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Effective use of biocontrol agents is an important component of sustainable agriculture. A previous numerical study of a generic model showed that biocontrol efficacy was greatest for a single biocontrol agent (BCA) combining competition with mycoparasitism or antibiosis. This study uses the same mathematical model to investigate whether the biocontrol efficacy of combined use of two BCAs with different biocontrol mechanisms is greater than that of a single BCA with either or both of the two mechanisms, assuming that two BCAs occupy the same host tissue as the pathogen. Within the parameter values considered, a BCA with two biocontrol mechanisms always outperformed the combined use of two BCAs with a single but different biocontrol mechanism. Similarly, combined use of two BCAs with a single but different biocontrol mechanism is shown to be far less effective than that of a single BCA with both mechanisms. Disease suppression from combined use of two BCAs was very similar to that achieved by the more efficacious one. As expected, a higher BCA introduction rate led to increased disease suppression. Incorporation of interactions between two BCAs did not greatly affect the disease dynamics except when a mycoparasitic and, to a lesser extent, an antibiotic-producing BCA was involved. Increasing the competitiveness of a mycoparasitic BCA over a BCA whose biocontrol mechanism is either competition or antibiosis may lead to improved biocontrol initially and reduced fluctuations in disease dynamics. The present study suggests that, under the model assumptions, combined use of two BCAs with different biocontrol mechanisms in most cases only results in control efficacies similar to using the more efficacious one alone. These predictions are consistent with published experimental results, suggesting that combined use of BCAs should not be recommended without clear understanding of their main biocontrol mechanisms and relative competitiveness, and experimental evaluation.
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Affiliation(s)
- X-M Xu
- College of Plant Protection, Northwest A & F University, Shaanxi, People's Republic of China.
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