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Sessa L, Oberti H, Abreo E, Pedrini N. Beauveria bassiana transcriptomics reveal virulence-associated shifts during insect lipid assimilation. Appl Microbiol Biotechnol 2024; 108:23. [PMID: 38159119 DOI: 10.1007/s00253-023-12898-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 09/19/2023] [Accepted: 10/03/2023] [Indexed: 01/03/2024]
Abstract
Insect cuticular lipids, especially epicuticular hydrocarbons (CHC), have a significant role in insect ecology and interactions with other organisms, including fungi. The CHC composition of a specific insect species may influence the outcome of the interaction with a specific fungal strain. Some insects, such as Piezodorus guildinii, have low susceptibility towards fungal infections seemingly due to their CHC composition. The entomopathogenic fungus Beauveria bassiana can assimilate CHC and incorporate them as building blocks via cytochrome P450 monooxygenases (CYPs). However, little is known about other enzymes that promote the degradation/assimilation of these cuticular components. In this study, we performed a transcriptomic analysis to evaluate the in vitro response of two virulence-contrasting B. bassiana strains when grown on three different P. guildinii CHC sources. We found a different expression profile of virulence-related genes, as well as different GO and KEGG parameters enriched at 4 days post-inoculation, which could help account for the intrinsic virulence and for an alkane-priming virulence enhancement effect. The hypovirulent strain predominantly showed higher expression of cuticle penetration genes, including chitinases, proteases, and CYPs, with GO term categories of "heme binding," "monooxygenase activity," and "peroxisome" pathways enriched. The hypervirulent strain showed higher expression of cell wall remodeling and cell cycle genes, and cuticle adhesion and a distinct set of CYPs, with GO categories of "DNA-binding transcription factor activity" and KEGG pathways corresponding to "meiosis-yeast" and "cell cycle" enriched. These results suggest a delay and alternate routes in pathogenicity-related metabolism in the hypovirulent strain in comparison with the hypervirulent strain. KEY POINTS: •Transcriptomics of two B. bassiana strains grown in P. guildinii cuticular components •Virulence-related genes correlated with virulence enhancement towards P. guildinii •Differentially expressed genes, GOs and KEGGs showed different metabolic timelines associated with virulence.
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Affiliation(s)
- Lucia Sessa
- Laboratorio de Bioproducción, Plataforma de Bioinsumos. Instituto Nacional de Investigación Agropecuaria, estación experimental Wilson Ferreira Aldunate, Ruta 48, km, 10, Canelones, Uruguay
| | - Héctor Oberti
- Laboratorio de Bioproducción, Plataforma de Bioinsumos. Instituto Nacional de Investigación Agropecuaria, estación experimental Wilson Ferreira Aldunate, Ruta 48, km, 10, Canelones, Uruguay
| | - Eduardo Abreo
- Laboratorio de Bioproducción, Plataforma de Bioinsumos. Instituto Nacional de Investigación Agropecuaria, estación experimental Wilson Ferreira Aldunate, Ruta 48, km, 10, Canelones, Uruguay.
| | - Nicolas Pedrini
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CCT La Plata Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-Universidad Nacional de La Plata (UNLP), calles 60 y 120, 1900, La Plata, Argentina.
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Dong Y, Li T, Hou Y, Wilson K, Wang X, Su C, Li Y, Ren G, Xu P. Densovirus infection facilitates plant-virus transmission by an aphid. THE NEW PHYTOLOGIST 2024; 243:1539-1553. [PMID: 39021237 DOI: 10.1111/nph.19908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2024] [Accepted: 05/29/2024] [Indexed: 07/20/2024]
Abstract
The interactions among plant viruses, insect vectors, and host plants have been well studied; however, the roles of insect viruses in this system have largely been neglected. We investigated the effects of MpnDV infection on aphid and PVY transmission using bioassays, RNA interference (RNAi), and GC-MS methods and green peach aphid (Myzus persicae (Sulzer)), potato virus Y (PVY), and densovirus (Myzus persicae nicotianae densovirus, MpnDV) as model systems. MpnDV increased the activities of its host, promoting population dispersal and leading to significant proliferation in tobacco plants by significantly enhancing the titer of the sesquiterpene (E)-β-farnesene (EβF) via up-regulation of expression levels of the MpFPPS1 gene. The proliferation and dispersal of MpnDV-positive individuals were faster than that of MpnDV-negative individuals in PVY-infected tobacco plants, which promoted the transmission of PVY. These results combined showed that an insect virus may facilitate the transmission of a plant virus by enhancing the locomotor activity and population proliferation of insect vectors. These findings provide novel opportunities for controlling insect vectors and plant viruses, which can be used in the development of novel management strategies.
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Affiliation(s)
- Yonghao Dong
- Key Laboratory of Tobacco Pest Monitoring Controlling & Integrated Management, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
| | - Tong Li
- Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Yuanyuan Hou
- Key Laboratory of Tobacco Pest Monitoring Controlling & Integrated Management, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
| | - Kenneth Wilson
- Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YW, UK
| | - Xiufang Wang
- Key Laboratory of Tobacco Pest Monitoring Controlling & Integrated Management, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
| | - Chenyu Su
- Key Laboratory of Tobacco Pest Monitoring Controlling & Integrated Management, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
| | - Yunhe Li
- State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Life Sciences and College of Agriculture, Henan University, Kaifeng, 475004, China
| | - Guangwei Ren
- Key Laboratory of Tobacco Pest Monitoring Controlling & Integrated Management, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
| | - Pengjun Xu
- Key Laboratory of Tobacco Pest Monitoring Controlling & Integrated Management, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
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Wang X, Yuan Q, He L, Wang Z, Li G, Wang Z, Liu H. Biological and physiological effects in Bemisia tabaci feeding on tomatoes endophytically colonized by Beauveria bassiana. PEST MANAGEMENT SCIENCE 2024; 80:4085-4097. [PMID: 38587112 DOI: 10.1002/ps.8121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 03/28/2024] [Accepted: 04/01/2024] [Indexed: 04/09/2024]
Abstract
BACKGROUND Entomopathogenic fungi (EPF) treatment of plants may affect the survival and feeding preferences of herbivorous pests. However, comprehensive studies on the fitness across their entire life cycle, feeding behavior, and physiological changes in herbivores consuming EPF-treated plants within the tripartite interactions of EPF, plants, and pests are still limited. In this study, we utilized life tables, electrical penetration graph (EPG), and metabolomics to uncover the biological and physiological characteristics of Bemisia tabaci on tomato plants inoculated with Beauveria bassiana through root irrigation. RESULTS Our study indicated that Beauveria bassiana Bb252 can penetrate the entire tissue from the point of inoculation, primarily colonizing the intercellular spaces and vascular tissue. However, this colonization is temporary, lasting no more than 35 days. Moreover, the population fitness and feeding behavior of Bemisia tabaci on tomato plants treated with Beauveria bassiana via root irrigation were significantly affected, showing a substantial 41.4% decrease in net reproductive rate (R0), a notable reduction in watery salivation, and shortened phloem ingestion. Lastly, we observed a significant decrease in hormones and amino acids of whiteflies that fed on Beauveria bassiana-treated tomato plants by root irrigation. CONCLUSIONS Our results indicated that the endophyte, Beauveria bassiana Bb252, reduced demographic fitness of Bemisia tabaci by altering its hormones and amino acids levels. These findings enhance our understanding of multitrophic interactions in integrated pest management. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Xian Wang
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River, Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
| | - Qian Yuan
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River, Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
| | - Liqiang He
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River, Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
| | - Zhou Wang
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River, Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
| | - Guangyun Li
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River, Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
| | - Ziying Wang
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River, Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
| | - Huai Liu
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River, Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
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Qu J, Feng Y, Zou X, Zhou Y, Cao W. Transcriptome and proteome analyses reveal genes and signaling pathways involved in the response to two insect hormones in the insect-fungal pathogen Hirsutella satumaensis. mSystems 2024:e0016624. [PMID: 38984826 DOI: 10.1128/msystems.00166-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Accepted: 05/27/2024] [Indexed: 07/11/2024] Open
Abstract
The insect hormones ecdysone (20E) and juvenile hormone III (JH) have been demonstrated to stimulate the secretion of conidia mucilage and pigments in Hirsutella satumaensis. However, the underlying mechanisms remain elusive. Here, comparative transcriptome and proteome analyses were performed to identify the fungal genes and proteins of H. satumaensis that are up- or downregulated in response to insect hormones. A total of 17,407 unigenes and 1,016 proteins in conidia mucilage were identified. The genes involved in response to the hormones were classified into four functional groups: (1) stress response-related genes that are required for the removal of reactive oxygen species (glutathione synthetase, c7144) and genes involved in the response to osmotic stress in the hemocoel, such as those encoding proteins involved in the G, mTOR, and MAPK signaling pathways (2); insect hormone metabolic genes, including genes encoding ecdysteroid UDP-glucosyltransferase, ecdysteroid-22-kinase, and a key aldehyde dehydrogenase in a juvenile hormone synthesis pathway (3); secretory proteins that share homology with those of the host Bombyx mori, including fibrohexamerin, sericin 1, metalloprotease 1 protein, and silk gum protein, which were revealed by the omics data; and (4) proteins related to amino sugar metabolism and oxidative phosphorylation that were specifically expressed in mucilage in response to 20E and JH, respectively. These findings revealed that H. satumaensis can mount effective responses by modulating the expression of genes involved in the detoxification, adaptation, and evasion of insect hormone-mediated immune responses, providing fresh insights into fungal pathogen-host insect interactions.IMPORTANCEInsect hormones are highly important for the regulation of insect growth, development, and immune system function. Thus, the expansion of entomopathogenic fungi (EPF) could be affected by these hormones when they inhabit the host hemocoel. However, the molecular basis of EPF in response to insect hormones has yet to be determined. Our results revealed that EPF are impacted by 20E and JH, both of which act as signals, as these hormones lead to changes in metabolic pathways of the fungus, thus demonstrating a direct relationship between the fungus and the hormones. Furthermore, adaptive strategies, such as the use of ecdysone-inactivating enzymes and secreted filamentous proteins in H. satumaensis, which strongly resemble those of the host insect, have been discovered, thus illustrating the importance of adaptation to insect hormones for a better understanding of the interaction between insects and EPF.
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Affiliation(s)
- Jiaojiao Qu
- College of Tea Sciences, Guizhou University, Guiyang, China
| | - Yongli Feng
- Institute of Fungal Resources, College of Life Sciences, Guizhou University, Guiyang, China
| | - Xiao Zou
- Institute of Fungal Resources, College of Life Sciences, Guizhou University, Guiyang, China
| | - Yeming Zhou
- Institute of Fungal Resources, College of Life Sciences, Guizhou University, Guiyang, China
| | - Wei Cao
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences/Institute of Agro-bioengineering, Guizhou University, Guiyang, China
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Kaczmarek A, Katarzyna Wrońska A, Irena Boguś M. Octanoic acid kills Lucilia sericata (Diptera: Calliphoridae) by affecting two major defence systems: cuticular free fatty acids and immunocompetent cells. J Invertebr Pathol 2024; 206:108165. [PMID: 38986766 DOI: 10.1016/j.jip.2024.108165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 05/10/2024] [Accepted: 07/07/2024] [Indexed: 07/12/2024]
Abstract
This work examines the insecticidal activity of octanoic acid (C8:0), a short-chain fatty acid detected in entomopathogenic fungus - Conidiobolus coronatus medium, against Lucilia sericata larvae and adults. The LD50 value was calculated as 3.04±0.26 µg/mg (3040 mg/kg) of insect body mass, which places the compound in category 5 of acute toxicity (slightly hazardous). The presented research also describes its probable mechanism, with a particular focus on changes in two main insect defense mechanisms: (1) the composition of the cuticle (GC-MS analysis) and (2) immunocompetent cells (microscopic analysis of cultured hemocytes). More precisely, octanoic acid application resulted in changes in cuticular free fatty acid (FFA) profiles in both adults and larvae; generally, treatment increased short-chain FFAs, and a decrease of middle- and long-chain FFAs. Both in vivo and in vitro applications of octanoic acid resulted in vacuolisation, disintegration, and destruction of nets formed by plasmatocytes. As the compound has also previously been found to be toxic against Galleria mellonella, it appears to have lethal potential against insects in both the Orders Diptera and Lepidoptera, indicating it may have strong entomopathogenic potential. It is worth noting that octanoic acid is approved as a food additive with well-documented insecticidal activity, and hence may be a valuable component in the design of new insecticides that are safe for both humans and the environment.
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Affiliation(s)
- Agata Kaczmarek
- Museum and Institute of Zoology, Polish Academy of Science, Twarda 51/55, 00-818 Warszawa, Poland.
| | - Anna Katarzyna Wrońska
- Museum and Institute of Zoology, Polish Academy of Science, Twarda 51/55, 00-818 Warszawa, Poland
| | - Mieczysława Irena Boguś
- Museum and Institute of Zoology, Polish Academy of Science, Twarda 51/55, 00-818 Warszawa, Poland; Biomibo, Strzygłowska 15, 04-872 Warsaw, Poland
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Arora S, Seth R, Singh Y, Seth RK. Effect of male parental gamma irradiation on host suitability of its F1 progeny of a lepidopteran tropical pest, Spodoptera litura (Fabr.) towards development and virulence of entomopathogenic nematodes, Steinernema thermophilum. Appl Radiat Isot 2024; 212:111426. [PMID: 38981166 DOI: 10.1016/j.apradiso.2024.111426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 06/27/2024] [Accepted: 07/04/2024] [Indexed: 07/11/2024]
Abstract
The suitability of F1 progeny insect larvae of the irradiated male parent, Spodoptera litura (Fabr.) for infective juveniles (IJs) of entomopathogenic nematodes (EPN), Steinernema thermophilum was assessed to comprehend the feasibility of combining EPNs with nuclear pest control tactic. As compared to the control, the IJs induced faster host mortality with reduced proliferation in F1 host larvae. IJs derived from F1 host larvae exhibited almost similar proliferation capacity on normal hosts as in control. Further, the molecular basis of EPNs induced mortality in F1 host larvae was evaluated. Dual stress of EPN infection and irradiation induced downregulation of the relative mRNA expression of antimicrobial genes and upregulated expression of antioxidative genes. A pronounced effect of EPNs in association with irradiation stress was apparent on host mortality. Radiation induced sterile F1 insect larvae of S. litura acted as a reasonably suitable host for EPNs and also provided the environment for developing viable EPNs for their potential use as biocontrol agents.
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Affiliation(s)
- Simran Arora
- Department of Zoology, University of Delhi, North Campus, Delhi, 110007, India
| | - Ranjana Seth
- Department of Zoology, University of Delhi, North Campus, Delhi, 110007, India
| | - Yogendra Singh
- Department of Zoology, University of Delhi, North Campus, Delhi, 110007, India
| | - R K Seth
- Department of Zoology, University of Delhi, North Campus, Delhi, 110007, India.
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Tonğa A, Erkek M, Ali J, Fathipour Y, Özder N. A comparative approach for life history and functional response demonstrates similar survival strategies for Trichogramma evanescens and T. pintoi. PEST MANAGEMENT SCIENCE 2024. [PMID: 38965816 DOI: 10.1002/ps.8278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2024] [Revised: 06/14/2024] [Accepted: 06/17/2024] [Indexed: 07/06/2024]
Abstract
BACKGROUND Egg parasitoids are important biological control agents of lepidopteran pests of agricultural crops. Trichogramma evanescens Westwood and T. pintoi Voegele (Hymenoptera: Trichogrammatidae) are egg parasitoids with worldwide importance. The parasitoid selection necessitates comparative assessment of the life table traits and functional response analysis to provide insights into their effectiveness in pest control. In this study, we examined their life table traits including survivorship and reproductivity, and functional response and associated parameters i.e., attack coefficient and handling time. RESULTS Life table parameters, using age-stage, two-sex theory, revealed similar survival and reproductive strategies for both species. For example, the female longevity, oviposition days and fecundity did not differ between both species. Exceptionally, the male longevity of T. evanescens was shorter than that of T. pintoi. The population growth parameters such as gross reproductive rate (GRR), net reproductive rate (R0), intrinsic rate of increase (r), finite rate of increase (λ), and mean generation time (T) did not differ between species. The polynomial logistic regression yielded a type III functional response and a non-linear least square analysis revealed different attack coefficient and similar handling time. However, their parasitism rate differed between the lowest (five eggs) and highest (80 eggs) initial host egg densities such that T. evanescens had a lower parasitism rate at the lowest density and higher parasitism rate at the highest density. CONCLUSION The similarity in survival strategies and minor differences in host handling of both parasitoids are discussed in terms of relevance to applied biological control applications and evolutionary traits. © 2024 The Author(s). Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Adil Tonğa
- Diyarbakır Plant Protection Research Institute, Entomology Department, Diyarbakır, Türkiye
| | - Mustafa Erkek
- Diyarbakır Plant Protection Research Institute, Entomology Department, Diyarbakır, Türkiye
| | - Jamin Ali
- Jilin Agricultural University, College of Plant protection, Jilin, China
| | - Yaghoub Fathipour
- Tarbiat Modares University, Department of Entomology, Faculty of Agriculture, Tehran, Iran
| | - Nihal Özder
- Tekirdağ Namık Kemal University, Plant Protection Department, Tekirdağ, Türkiye
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Dearlove EL, Chandler D, Edgington S, Berry SD, Martin G, Svendsen C, Hesketh H. Improved control of Trialeurodes vaporariorum using mixture combinations of entomopathogenic fungi and the chemical insecticide spiromesifen. Sci Rep 2024; 14:15259. [PMID: 38956259 PMCID: PMC11219850 DOI: 10.1038/s41598-024-66051-8] [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: 11/16/2023] [Accepted: 06/26/2024] [Indexed: 07/04/2024] Open
Abstract
Greenhouse whitefly (Trialeurodes vaporariorum) is a major global pest, causing direct damage to plants and transmitting viral plant diseases. Management of T. vaporariorum is problematic because of widespread pesticide resistance, and many greenhouse growers rely on biological control agents to regulate T. vaporariorum populations. However, these are often slow and vary in efficacy, leading to subsequent application of chemical insecticides when pest populations exceed threshold levels. Combining chemical and biological pesticides has great potential but can result in different outcomes, from positive to negative interactions. In this study, we evaluated co-applications of the entomopathogenic fungi (EPF) Beauveria bassiana and Cordyceps farinosa and the chemical insecticide spiromesifen in laboratory bioassays. Complex interactions between the EPFs and insecticide were described using an ecotoxicological mixtures model, the MixTox analysis. Depending on the EPF and chemical concentrations applied, mixtures resulted in additivity, synergism, or antagonism in terms of total whitefly mortality. Combinations of B. bassiana and spiromesifen, compared to single treatments, increased the rate of kill by 5 days. Results indicate the potential for combined applications of EPF and spiromesifen as an effective integrated pest management strategy and demonstrate the applicability of the MixTox model to describe complex mixture interactions.
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Affiliation(s)
- Eleanor L Dearlove
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, UK.
- RSK ADAS Ltd. ADAS Gleadthorpe, Meden Vale, Mansfield, NG20 9PD, UK.
| | - David Chandler
- Warwick Crop Centre, School of Life Sciences, Wellesbourne Campus, The University of Warwick, Warwick, UK
| | | | | | | | - Claus Svendsen
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, UK
| | - Helen Hesketh
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, UK.
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Ulug D, Touray M, Hazal Gulsen S, Cimen H, Hazir C, Bode HB, Hazir S. A taste of a toxin paradise: Xenorhabdus and Photorhabdus bacterial secondary metabolites against Aedes aegypti larvae and eggs. J Invertebr Pathol 2024; 205:108126. [PMID: 38734162 DOI: 10.1016/j.jip.2024.108126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 04/30/2024] [Accepted: 05/07/2024] [Indexed: 05/13/2024]
Abstract
Aedes-transmitted arboviral infections such as Dengue, Yellow Fever, Zika and Chikungunya are increasing public health problems. Xenorhabdus and Photorhabdus bacteria are promising sources of effective compounds with important biological activities. This study investigated the effects of cell-free supernatants of X. szentirmaii, X. cabanillasii and P. kayaii against Ae. aegypti eggs and larvae and identified the bioactive larvicidal compound in X. szentirmaii using The EasyPACId method. Among the three tested bacterial species, X. cabanillasii exhibited the highest (96%) egg hatching inhibition and larvicidal activity (100% mortality), whereas P. kayaii was the least effective species in our study. EasyPACId method revealed that bioactive larvicidal compound in the bacterial supernatant was fabclavine. Fabclavines obtained from promoter exchange mutants of different bacterial species such as X. cabanillasii, X. budapestensis, X. indica, X. szentirmaii, X. hominckii and X. stockiae were effective against mosquito larvae. Results show that these bacterial metabolites have potential to be used in integrated pest management (IPM) programmes of mosquitoes.
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Affiliation(s)
- Derya Ulug
- Department of Biology, Faculty of Science, Aydin Adnan Menderes University, 09100, Aydin, Türkiye.
| | - Mustapha Touray
- Department of Biology, Faculty of Science, Aydin Adnan Menderes University, 09100, Aydin, Türkiye
| | - Sebnem Hazal Gulsen
- Department of Plant and Animal Production, Kocarli Vocational School, Aydin Adnan Menderes University, 09100 Aydin, Türkiye
| | - Harun Cimen
- Recombinant DNA and Recombinant Protein Application and Research Center, Aydin Adnan Menderes University, 09100, Aydin, Türkiye
| | - Canan Hazir
- Aydin Health Services Vocational School, Adnan Menderes University, 09100 Aydin, Türkiye
| | - Helge B Bode
- Max-Planck-Institute for Terrestrial Microbiology, Department of Natural Products in Organismic Interactions, 35043 Marburg, Germany; Molekulare Biotechnologie, Fachbereich Biowissenschaften, Goethe Universität Frankfurt, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany; Center for Synthetic Microbiology, Phillips University Marburg, 35043 Marburg, Germany; Department of Chemistry, Phillips University Marburg, 35043 Marburg, Germany; Senckenberg Gesellschaft für Naturforschung, Frankfurt am Main, 60325, Germany
| | - Selcuk Hazir
- Department of Biology, Faculty of Science, Aydin Adnan Menderes University, 09100, Aydin, Türkiye
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Moisan K, Kostenko O, Galeano M, Soler R, van der Ent S, Hiltpold I. The sky is not the limit: Successful foliar application of Steinernema spp. entomopathogenic nematodes to control Lepidopteran caterpillars. J Invertebr Pathol 2024; 206:108163. [PMID: 38955262 DOI: 10.1016/j.jip.2024.108163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 06/24/2024] [Accepted: 06/27/2024] [Indexed: 07/04/2024]
Abstract
Entomopathogenic nematodes (EPNs) are ubiquitous soil-thriving organisms that use chemical cues to seek and infect soil-dwelling arthropods, yielding various levels of biological control. Going beyond soil application, scientists and practitioners started exploring the option of applying EPNs onto the foliage of crops in attempts to manage leaf-dwelling insect pests as well. Despite some success, particularly with protective formulations, it remains uncertain whether EPNs could indeed survive the phyllospheric environment, and successfully control foliar insect pests. In this context, we tested the potential of commercially produced Steinernema feltiae and S. carpocapsae, two of the most commonly used EPNs in the field of biological control, in controlling Lepidopteran foliar pests of economic importance, i.e. Tuta absoluta and Spodoptera spp. caterpillars as models. We first tested the survival and efficacy of both EPN species against the Lepidopteran caterpillars when applied onto tomato, sweet pepper and lettuce leaves, under controlled conditions and in commercial greenhouse conditions, respectively. Subsequently, we explored the behavioural responses of the EPNs to environmental cues typically encountered in the phyllosphere, and analysed plant volatile organic compounds (VOCs). Our results show that both S. feltiae and S. carpocapsae successfully survived and infected the foliar caterpillars, reaching similar level of control to a standard chemical pesticide in commercial practices. Remarkably, both EPN species survived and remained effective up to four days in the phyllosphere, and needed only a few hours to successfully penetrate the caterpillars. Interestingly, S. feltiae was attracted to VOCs from tomato plants, and tended to prefer those from caterpillar-induced plants, suggesting that the nematodes may actively forage toward its host, although it has never been exposed to leaf-borne volatiles during its evolution. The present study shows the high potential of steinernematids in managing major foliar pests in greenhouses and in becoming a key player in foliar biological control. In particular, the discovery that EPNs use foliar VOCs to locate caterpillar hosts opens up new opportunities in terms of application techniques and affordable effective doses.
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Affiliation(s)
- Kay Moisan
- KOPPERT B.V. Agronomical Development AGD. Veilingweg 14, 2651 BE, Berkel en Rodenrijs, the Netherlands.
| | - Olga Kostenko
- KOPPERT B.V. Agronomical Development AGD. Veilingweg 14, 2651 BE, Berkel en Rodenrijs, the Netherlands
| | - Magda Galeano
- KOPPERT Spain, Research Center (R&D Dpt). 470 nb, Paraje Piedra Roda, 04738 Vícar (Almería), Spain
| | - Roxina Soler
- KOPPERT B.V. Agronomical Development AGD. Veilingweg 14, 2651 BE, Berkel en Rodenrijs, the Netherlands
| | - Sjoerd van der Ent
- KOPPERT B.V. Agronomical Development AGD. Veilingweg 14, 2651 BE, Berkel en Rodenrijs, the Netherlands
| | - Ivan Hiltpold
- Agroscope, Entomology and Nematology Group, Route de Duillier 60, 1260 Nyon, Switzerland
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11
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Ranesi M, Vitale S, Staropoli A, Di Lelio I, Izzo LG, De Luca MG, Becchimanzi A, Pennacchio F, Lorito M, Woo SL, Vinale F, Turrà D. Field isolates of Beauveria bassiana exhibit biological heterogeneity in multitrophic interactions of agricultural importance. Microbiol Res 2024; 286:127819. [PMID: 38986181 DOI: 10.1016/j.micres.2024.127819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 06/18/2024] [Accepted: 06/20/2024] [Indexed: 07/12/2024]
Abstract
Beauveria bassiana (Bb) is a widespread entomopathogenic fungus widely used in agriculture for crop protection. Other than pest control, fungi belonging to the B. bassiana complex represent an important microbial resource in agroecosystems, considering their multiple interactions with other microorganisms as antagonists of phytopathogens, or with plants as endophytic colonizers and growth promoters. Here, we characterised field collected or commercial isolates of B. bassiana relative to the environmental factors that affect their growth. We further compared the metabolome, the entomopathogenic potential and biocontrol activity of the tested isolates respectively on the insect pest Spodoptera littoralis or against the fungal plant pathogen Fusarium oxysporum. Our analysis revealed that the B. bassiana complex is characterised by a high level of inter-isolate heterogeneity in terms of nutritional requirements, establishment of intra- or inter-kingdom interactions, and the nature of metabolites produced. Interestingly, certain B. bassiana isolates demonstrated a preference for low nutrient plant-derived media, which hints at their adaptation towards an endophytic lifestyle over a saprophytic one. In addition, there was a noticeable variation among different B. bassiana isolates in their capacity to kill S. littoralis larvae in a contact infection test, but not in an intrahaemocoelic injection experiment, suggesting a unique level of adaptability specific to the host. On the other hand, most B. bassiana isolates exhibited similar biocontrol efficacy against the soil-dwelling ascomycete F. oxysporum f. sp. lycopersici, a pathogen responsible for vascular wilt disease in tomato plants, effectively averting wilting. Overall, we show that the effectiveness of B. bassiana isolates can greatly vary, emphasising the importance of isolate selection and nutritional adaptability consideration for their use in sustainable agriculture.
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Affiliation(s)
- M Ranesi
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, Portici (Na) 80055, Italy
| | - S Vitale
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, Portici (Na) 80055, Italy; Institute for Sustainable Plant Protection - National Research Council, Piazzale E. Fermi 1, Portici (Na) 80055, Italy
| | - A Staropoli
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, Portici (Na) 80055, Italy; Institute for Sustainable Plant Protection - National Research Council, Piazzale E. Fermi 1, Portici (Na) 80055, Italy
| | - I Di Lelio
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, Portici (Na) 80055, Italy; Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples Federico II, Via Università, 100, Portici 80055, Italy
| | - L G Izzo
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, Portici (Na) 80055, Italy
| | - M G De Luca
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, Portici (Na) 80055, Italy
| | - A Becchimanzi
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, Portici (Na) 80055, Italy; Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples Federico II, Via Università, 100, Portici 80055, Italy
| | - F Pennacchio
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, Portici (Na) 80055, Italy; Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples Federico II, Via Università, 100, Portici 80055, Italy
| | - M Lorito
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, Portici (Na) 80055, Italy; Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples Federico II, Via Università, 100, Portici 80055, Italy
| | - S L Woo
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, Naples 80131, Italy; Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples Federico II, Via Università, 100, Portici 80055, Italy
| | - F Vinale
- Institute for Sustainable Plant Protection - National Research Council, Piazzale E. Fermi 1, Portici (Na) 80055, Italy; Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Via F. Delpino 1, Naples 80137, Italy; Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples Federico II, Via Università, 100, Portici 80055, Italy
| | - D Turrà
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, Portici (Na) 80055, Italy; Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples Federico II, Via Università, 100, Portici 80055, Italy; Computational and Quantitative Biology Task Force, University of Naples Federico II, Naples, Italy; Bioelectronics Task Force, University of Naples Federico II, Naples, Italy.
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12
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Zhao X, Höfte M, Spanoghe P, Rajkovic A, Uyttendaele M. Biofilm-forming Ability of Bacillus thuringiensis Strains from Biopesticides on Polystyrene and their Attachment on Spinach. J Food Prot 2024; 87:100321. [PMID: 38936698 DOI: 10.1016/j.jfp.2024.100321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 06/17/2024] [Accepted: 06/20/2024] [Indexed: 06/29/2024]
Abstract
Bacillus thuringiensis-based commercial products as a biopesticide have been used for more than 60 years in agriculture. However, as one of the species in B. cereus group, B. thuringiensis has been considered as an emerging hazard with the potential to cause food toxico-infections. The present study aimed to evaluate the biofilm-forming ability of B. thuringiensis biopesticide strains and their attachment on spinach, compared to foodborne B. cereus strains. Biofilm formations of tested strains were found to be strain-specific and affected by the nutrient conditions more than the incubation time. Nutrient starvation conditions generally reduced the biofilm formation of tested B. thuringiensis and B. cereus strains, particularly B. thuringiensis ABTS-1857 strain was found as the nonbiofilm former in starvation conditions. It is worth mentioning that B. thuringiensis SA-11 strain showed stronger biofilm-forming ability with more air-liquid interface biofilm than the other two B. thuringiensis biopesticide strains, but no such higher attachment of B. thuringiensis SA-11 to spinach was observed. These results indicate that B. thuringiensis SA-11 strain can enter the food processing lines by the attachment on spinach leaves, and it has the potential to form biofilms throughout the processing lines or the production environment when sufficient nutrients are available. However, more biofilm tests of B. thuringiensis biopesticide strains in the vegetable production chain should be performed. The dry formulation of commercial B. thuringiensis biopesticides enhanced their adhesion on spinach leaves, whereas the strength of adhesion was not improved by the formulation. In addition, 1-2 log reductions of spores after the intensive washing of spinach leaves in the lab were detected. However, the log reduction due to the actual washing done by the food processing companies in large-volume washing baths or by consumers at home would be limited and less than this lab simulation.
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Affiliation(s)
- Xingchen Zhao
- Food Microbiology and Food Preservation Research Unit, Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium; Research Group for Food Microbiology and Hygiene, National Food Institute, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark.
| | - Monica Höfte
- Laboratory of Phytopathology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium
| | - Pieter Spanoghe
- Laboratory of Crop Protection Chemistry, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium
| | - Andreja Rajkovic
- Food Microbiology and Food Preservation Research Unit, Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium
| | - Mieke Uyttendaele
- Food Microbiology and Food Preservation Research Unit, Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium
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Wyckhuys KAG, Pozsgai G, Ben Fekih I, Sanchez-Garcia FJ, Elkahky M. Biodiversity loss impacts top-down regulation of insect herbivores across ecosystem boundaries. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 930:172807. [PMID: 38679092 DOI: 10.1016/j.scitotenv.2024.172807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2024] [Revised: 04/21/2024] [Accepted: 04/25/2024] [Indexed: 05/01/2024]
Abstract
Biodiversity loss, as driven by anthropogenic global change, imperils biosphere intactness and integrity. Ecosystem services such as top-down regulation (or biological control; BC) are susceptible to loss of extinction-prone taxa at upper trophic levels and secondary 'support' species e.g., herbivores. Here, drawing upon curated open-access interaction data, we structurally analyze trophic networks centered on the fall armyworm Spodoptera frugiperda (Lepidoptera: Noctuidae) and assess their robustness to species loss. Tri-partite networks link 80 BC organisms (invertebrate or microbial), 512 lepidopteran hosts and 1194 plants (including 147 cultivated crops) in the Neotropics. These comprise threatened herbaceous or woody plants and conservation flagships such as saturniid moths. Treating all interaction partners functionally equivalent, random herbivore loss exerts a respective 26 % or 108 % higher impact on top-down regulation in crop and non-crop settings than that of BC organisms (at 50 % loss). Equally, random loss of BC organisms affects herbivore regulation to a greater extent (13.8 % at 50 % loss) than herbivore loss mediates their preservation (11.4 %). Yet, under moderate biodiversity loss, (non-pest) herbivores prove highly susceptible to loss of BC organisms. Our topological approach spotlights how agriculturally-subsidized BC agents benefit vegetation restoration, while non-pest herbivores uphold biological control in on- and off-farm settings alike. Our work underlines how the on-farm usage of endemic biological control organisms can advance conservation, restoration, and agricultural sustainability imperatives. We discuss how integrative approaches and close interdisciplinary cooperation can spawn desirable outcomes for science, policy and practice.
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Affiliation(s)
- Kris A G Wyckhuys
- Chrysalis Consulting, Danang, Viet Nam; Institute for Plant Protection, China Academy of Agricultural Sciences (CAAS), Beijing, China; School of Biological Sciences, University of Queensland, Saint Lucia, Australia; Food and Agriculture Organization (FAO), Rome, Italy.
| | - Gabor Pozsgai
- cE3c - Centre for Ecology, Evolution and Environmental Changes & CHANGE - Global Change and Sustainability Institute, University of the Azores, Angra do Heroísmo, Portugal
| | - Ibtissem Ben Fekih
- Functional and Evolutionary Entomology, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium
| | | | - Maged Elkahky
- Food and Agriculture Organization (FAO), Rome, Italy
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Sain SK, Kranthi S, Kranthi KR, Monga D, Paul D, Prasad YG. Diversity study of Beauveria bassiana species for finding the most virulent strain to manage Bemisia tabaci in cotton. Appl Microbiol Biotechnol 2024; 108:364. [PMID: 38842723 PMCID: PMC11156744 DOI: 10.1007/s00253-024-13188-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 05/13/2024] [Accepted: 05/15/2024] [Indexed: 06/07/2024]
Abstract
Beauveria bassiana (Bal.-Criv.) is an important entomopathogenic fungus being used for the management of various agricultural pests worldwide. However, all strains of B. bassiana may not be effective against whitefly, Bemisia tabaci, or other pests, and strains show diversity in their growth, sporulation, virulence features, and overall bioefficacy. Thus, to select the most effective strain, a comprehensive way needs to be devised. We studied the diversity among the 102 strains of B. bassiana isolated from 19 insect species based on their physiological features, virulence, and molecular phylogeny, to identify promising ones for the management of B. tabaci. Strains showed diversity in mycelial growth, conidial production, and their virulence against B. tabaci nymphs. The highest nymphal mortality (2nd and 3rd instar) was recorded with MTCC-4511 (95.1%), MTCC-6289 (93.8%), and MTCC-4565 (89.9%) at a concentration of 1 × 106 conidia ml-1 under polyhouse conditions. The highest bioefficacy index (BI) was in MTCC-4511 (78.3%), MTCC-4565 (68.2%), and MTCC-4543 (62.1%). MTCC-4511, MTCC-4565, and MTCC-4543 clustered with positive loading of eigenvalues for the first two principal components and the cluster analysis also corresponded well with PCA (principal component analysis) (nymphal mortality and BI). The molecular phylogeny could not draw any distinct relationship between physiological features, the virulence of B. bassiana strains with the host and location. The BI, PCA, and square Euclidean distance cluster were found the most useful tools for selecting potential entomopathogenic strains. The selected strains could be utilized for the management of the B. tabaci nymphal population in the field through the development of effective formulations. KEY POINTS: • 102 B. bassiana strains showed diversity in growth and virulence against B. tabaci. • Bioefficacy index, PCA, and SED group are efficient tools for selecting potential strains. • MTCC-4511, 4565, and 4543 chosen as the most virulent strains to kill whitefly nymphs.
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Affiliation(s)
- Satish Kumar Sain
- ICAR-Central Institute for Cotton Research, Regional Station, Sirsa, Haryana, India.
| | - Sandhya Kranthi
- International Cotton Advisory Committee, Washington, DC, USA
| | | | - Dilip Monga
- ICAR-Central Institute for Cotton Research, Regional Station, Sirsa, Haryana, India
| | - Debashis Paul
- ICAR-Central Institute for Cotton Research, Regional Station, Sirsa, Haryana, India
| | - Yenumula G Prasad
- ICAR-Central Institute for Cotton Research, Nagpur, Maharashtra, India
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15
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Deschodt PS, Cory JS. Compatibility of the fungus Beauveria bassiana and Trichoplusia ni SNPV against the cabbage looper Trichoplusia ni: crop plant matters. PEST MANAGEMENT SCIENCE 2024; 80:2851-2859. [PMID: 38339817 DOI: 10.1002/ps.7993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 01/22/2024] [Accepted: 01/24/2024] [Indexed: 02/12/2024]
Abstract
BACKGROUND Microbial insecticides are an important weapon in insect pest management, but their use is still relatively limited. One approach for increasing their efficacy and use could be to combine different pathogens to increase pest mortality. However, little is known about whether increasing pathogen diversity will improve pest management. Here, we investigated the compatibility of two pathogens for the management of the cabbage looper, Trichoplusia ni, T. ni nucleopolyhedrovirus (TniSNPV) and the entomopathogenic fungus Beauveria bassiana, on two crops, tomato and broccoli. The pathogens were applied to individual plants using ultra low volume sprays, alone or in combination, either synchronously or asynchronously. Healthy third-instar T. ni larvae were introduced to the plants before application and collected by destructive sampling 24 h after the last pathogen application. RESULTS Combined applications did not result in an increase in larval mortality compared to TniSNPV alone, although mortality was generally high. B. bassiana was considerably less effective on broccoli compared to tomato. In both the combined treatments, virus-induced mortality was approximately 50% lower when applied together with the fungus, while fungus-induced mortality was not affected by the virus, even when the virus was introduced 24 h before the fungus. CONCLUSION While our results suggest that applying this combination of entomopathogens would not be beneficial for pest management, this study illustrates the need to consider the target crop as an important driver of the efficacy of both single and mixed pathogen applications in the field. © 2024 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Pauline S Deschodt
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Jenny S Cory
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
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16
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Sun K, Fu K, Hu T, Shentu X, Yu X. Leveraging insect viruses and genetic manipulation for sustainable agricultural pest control. PEST MANAGEMENT SCIENCE 2024; 80:2515-2527. [PMID: 37948321 DOI: 10.1002/ps.7878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 10/16/2023] [Accepted: 11/11/2023] [Indexed: 11/12/2023]
Abstract
The potential of insect viruses in the biological control of agricultural pests is well-recognized, yet their practical application faces obstacles such as host specificity, variable virulence, and resource scarcity. High-throughput sequencing (HTS) technologies have significantly advanced our capabilities in discovering and identifying new insect viruses, thereby enriching the arsenal for pest management. Concurrently, progress in reverse genetics has facilitated the development of versatile viral expression vectors. These vectors have enhanced the specificity and effectiveness of insect viruses in targeting specific pests, offering a more precise approach to pest control. This review provides a comprehensive examination of the methodologies employed in the identification of insect viruses using HTS. Additionally, it explores the domain of genetically modified insect viruses and their associated challenges in pest management. The adoption of these cutting-edge approaches holds great promise for developing environmentally sustainable and effective pest control solutions. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Kai Sun
- Zhejiang Provincial Key Laboratory of Biometrology and Inspection & Quarantine, College of Life Sciences, China Jiliang University, Hangzhou, China
| | - Kang Fu
- Zhejiang Provincial Key Laboratory of Biometrology and Inspection & Quarantine, College of Life Sciences, China Jiliang University, Hangzhou, China
| | - Tao Hu
- Zhejinag Seed Industry Group Xinchuang Bio-breeding Co., Ltd., Hangzhou, China
| | - Xuping Shentu
- Zhejiang Provincial Key Laboratory of Biometrology and Inspection & Quarantine, College of Life Sciences, China Jiliang University, Hangzhou, China
| | - Xiaoping Yu
- Zhejiang Provincial Key Laboratory of Biometrology and Inspection & Quarantine, College of Life Sciences, China Jiliang University, Hangzhou, China
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17
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Skrzecz I, Sierpińska A, Tumialis D. Entomopathogens in the integrated management of forest insects: from science to practice. PEST MANAGEMENT SCIENCE 2024; 80:2503-2514. [PMID: 37983918 DOI: 10.1002/ps.7871] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 10/30/2023] [Accepted: 11/20/2023] [Indexed: 11/22/2023]
Abstract
The most important aim of the integrated management of forest insect pests remains the prevention of insect outbreaks, which are a consequence of the interaction of many factors in forest ecosystems, including species composition, age and health of the forest, soil type, the presence of natural enemies, and climatic factors. Integrated pest management until now has been achieved using measures aimed at shaping the functioning of stands in a changing environment. The aim of this review is to summarize research on the use of entomopathogens (microorganisms and nematodes) in the management of forest insect pests and to identify the principal knowledge gaps. We briefly describe the main research directions on the use of pathogens and nematodes to control insect pests and discuss limitations affecting their implementation. Research on entomopathogens for the biocontrol of forest insects has provided a wealth of knowledge that can be used effectively to reduce insect populations. Despite this, few entomopathogens are currently used in integrated pest management in forestry. They are applied in inoculation or inundation biocontrol strategies. While the use of entomopathogens in forest pest management shows great promise, practical implementation remains a distant goal. Consequently, sustainable reduction of forest pests, mainly native species, will be largely based on conservation biological control, which aims to modify the environment to favor the activity of natural enemies that regulate pest populations. This type of biocontrol can be supported by a range of silvicultural measures to increase the resilience of stands to insect infestations. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Iwona Skrzecz
- Department of Forest Protection, Forest Research Institute, Raszyn, Poland
| | - Alicja Sierpińska
- Department of Forest Protection, Forest Research Institute, Raszyn, Poland
| | - Dorota Tumialis
- Department of Animal Environment Biology, Institute of Animal Sciences, Warsaw University of Life Sciences, Warsaw, Poland
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18
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Ammar A, Singh V, Ilic S, Samiksha F, Marsh A, Rodriguez-Palacios A. Rodent Gut Bacteria Coexisting with an Insect Gut Virus in Tapeworm Parasitic Cysts: Metagenomic Evidence of Microbial Selection in Extra-Intestinal Clinical Niches. Microorganisms 2024; 12:1130. [PMID: 38930512 PMCID: PMC11205618 DOI: 10.3390/microorganisms12061130] [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: 05/03/2024] [Revised: 05/20/2024] [Accepted: 05/27/2024] [Indexed: 06/28/2024] Open
Abstract
In medicine, parasitic cysts (e.g., brain cysticerci) are believed to be sterile, and are primarily treated with antiparasitic medications, not antibiotics, which could prevent abscess formation and localized inflammation. This study quantified the microbial composition of parasitic cysts in a wild rodent, using multi-kingdom metagenomics to comprehensively assess if parasitic cysts are sterile, and further understand gut microbial translocation and adaptation in wildlife confined environments, outside the gut. Analysis was conducted on DNA from two hepatic parasitic cysts from a feline tapeworm, Hydatigera (Taenia) taeniaeformis, affecting a wild vole mouse (Microtus pennsylvanicus), and from feces, liver and peritoneal fluid of this and two other concurrent individual wild voles trapped during pest control in one of our university research vegetable gardens. Bacterial metagenomics revealed the presence of gut commensal/opportunistic species, Parabacteroides distasonis, Bacteroides (Bacteroidota); Klebsiella variicola, E. coli (Enterobacteriaceae); Enterococcus faecium and Lactobacillus acidophilus (Bacillota) inhabiting the cysts, and peritoneal fluid. Remarkably, viral metagenomics revealed various murine viral species, and unexpectedly, a virus from the insect armyworm moth (Pseudaletia/Mythimna unipuncta), known as Mythimna unipuncta granulovirus A (MyunGV-A), in both cysts, and in one fecal and one peritoneal sample from the other non-cyst voles, indicating the survival and adaption potential of the insect virus in voles. Metagenomics also revealed a significantly lower probability of fungal detection in cysts compared to that in peritoneal fluid/feces (p < 0.05), with single taxon detection in each cyst (Malassezia and Pseudophaeomoniella oleicola). The peritoneal fluid had the highest probability for fungi. In conclusion, metagenomics revealed that bacteria/viruses/fungi coexist within parasitic cysts supporting the potential therapeutic benefits of antibiotics in cystic diseases, and in inflammatory microniches of chronic diseases, such as Crohn's disease gut wall cavitating micropathologies, from which we recently isolated similar synergistic pathogenic Bacteroidota and Enterobacteriaceae, and Bacillota.
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Affiliation(s)
- Amro Ammar
- Division of Gastroenterology and Liver Disease, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA; (A.A.); (V.S.)
- Digestive Health Research Institute, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Vaidhvi Singh
- Division of Gastroenterology and Liver Disease, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA; (A.A.); (V.S.)
- Digestive Health Research Institute, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Sanja Ilic
- Department of Human Sciences, Human Nutrition and Food Microbiology, The Ohio State University, Columbus, OH 43210, USA;
| | - Fnu Samiksha
- Department of Cancer Biology, Learner Research Institute, Cleveland Clinic, Cleveland, OH 44106, USA;
| | - Antoinette Marsh
- The Veterinary Medical Center Diagnostic Parasitology, Department of Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA;
| | - Alexander Rodriguez-Palacios
- Division of Gastroenterology and Liver Disease, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA; (A.A.); (V.S.)
- Digestive Health Research Institute, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
- Department of Molecular Biology and Microbiology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
- University Hospitals Research and Education Institute, University Hospitals Cleveland Medical Center, Cleveland, OH 44106, USA
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19
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Wend K, Zorrilla L, Freimoser FM, Gallet A. Microbial pesticides - challenges and future perspectives for testing and safety assessment with respect to human health. Environ Health 2024; 23:49. [PMID: 38811948 PMCID: PMC11134743 DOI: 10.1186/s12940-024-01090-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 05/10/2024] [Indexed: 05/31/2024]
Abstract
Plant protection measures are necessary to prevent pests and diseases from attacking and destroying crop plants and to meet consumer demands for agricultural produce. In the last decades the use of chemical pesticides has largely increased. Farmers are looking for alternatives. Biopesticides should be considered a sustainable solution. They may be less toxic than chemical pesticides, be very specific to the target pest, decompose quickly, and be less likely to cause resistance. On the other hand, lower efficacy and higher costs are two disadvantages of many biopesticides. Biopesticides include macroorganisms, natural compounds and microorganisms. Microbial pesticides are the most widely used and studied class of biopesticides. The greatest difference between microbial and chemical pesticides is the ability of the former to potentially multiply in the environment and on the crop plant after application. The data requirements for the European Union and the United States Environmental Protection Agency are highlighted, as these regulatory processes are the most followed in regions where local regulations for biopesticide products are not available or vague. New Approach Methods already proposed or harmonized for chemical pesticides are presented and discussed with respect to their use in evaluating microbial pesticide formulations. Evaluating the microbials themselves is not as simple as using the same validated New Approach Methods as for synthetic pesticides. Therefore, the authors suggest considering New Approach Method strategies specifically for microbials and global harmonization with acceptability with the advancements of such approaches. Further discussion is needed and greatly appreciated by the experts.
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Affiliation(s)
- K Wend
- German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, Berlin, 10589, Germany.
| | - L Zorrilla
- Bayer Crop Science, 700 Chesterfield Parkway West, Chesterfield, MO, 63017, USA
| | - F M Freimoser
- Agroscope, Research Division Plant Protection, Route de Duillier 60, Nyon 1, 1260, Switzerland
| | - A Gallet
- Université Côte d'Azur, CNRS, INRAE, ISA, Sophia-Antipolis, 06903, France
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20
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Yuan JN, Ye ZX, Chen MN, Ren PP, Ning C, Sun ZT, Chen JP, Zhang CX, Li JM, Mao Q. Identification and Characterization of Three Novel Solemo-like Viruses in the White-Backed Planthopper, Sogatella furcifera. INSECTS 2024; 15:394. [PMID: 38921109 PMCID: PMC11203538 DOI: 10.3390/insects15060394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 05/13/2024] [Accepted: 05/22/2024] [Indexed: 06/27/2024]
Abstract
Agricultural insects play a crucial role in transmitting plant viruses and host a considerable number of insect-specific viruses (ISVs). Among these insects, the white-backed planthoppers (WBPH; Sogatella furcifera, Hemiptera: Delphacidae) are noteworthy rice pests and are responsible for disseminating the southern rice black-streaked dwarf virus (SRBSDV), a significant rice virus. In this study, we analyzed WBPH transcriptome data from public sources and identified three novel viruses. These newly discovered viruses belong to the plant-associated viral family Solemoviridae and were tentatively named Sogatella furcifera solemo-like virus 1-3 (SFSolV1-3). Among them, SFSolV1 exhibited a prevalent existence in different laboratory populations, and its complete genome sequence was obtained using rapid amplification of cDNA ends (RACE) approaches. To investigate the antiviral RNA interference (RNAi) response in WBPH, we conducted an analysis of virus-derived small interfering RNAs (vsiRNAs). The vsiRNAs of SFSolV1 and -2 exhibited typical patterns associated with the host's siRNA-mediated antiviral immunity, with a preference for 21- and 22-nt vsiRNAs derived equally from both the sense and antisense genomic strands. Furthermore, we examined SFSolV1 infection and distribution in WBPH, revealing a significantly higher viral load of SFSolV1 in nymphs' hemolymph compared to other tissues. Additionally, in adult insects, SFSolV1 exhibited higher abundance in male adults than in female adults.
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Affiliation(s)
- Jing-Na Yuan
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of Ministry of Agriculture and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China; (J.-N.Y.); (Z.-X.Y.); (M.-N.C.); (P.-P.R.); (C.N.); (Z.-T.S.); (J.-P.C.); (C.-X.Z.); (J.-M.L.)
| | - Zhuang-Xin Ye
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of Ministry of Agriculture and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China; (J.-N.Y.); (Z.-X.Y.); (M.-N.C.); (P.-P.R.); (C.N.); (Z.-T.S.); (J.-P.C.); (C.-X.Z.); (J.-M.L.)
- College of Forestry, Nanjing Forestry University, Nanjing 210037, China
| | - Meng-Nan Chen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of Ministry of Agriculture and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China; (J.-N.Y.); (Z.-X.Y.); (M.-N.C.); (P.-P.R.); (C.N.); (Z.-T.S.); (J.-P.C.); (C.-X.Z.); (J.-M.L.)
| | - Peng-Peng Ren
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of Ministry of Agriculture and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China; (J.-N.Y.); (Z.-X.Y.); (M.-N.C.); (P.-P.R.); (C.N.); (Z.-T.S.); (J.-P.C.); (C.-X.Z.); (J.-M.L.)
| | - Chao Ning
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of Ministry of Agriculture and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China; (J.-N.Y.); (Z.-X.Y.); (M.-N.C.); (P.-P.R.); (C.N.); (Z.-T.S.); (J.-P.C.); (C.-X.Z.); (J.-M.L.)
| | - Zong-Tao Sun
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of Ministry of Agriculture and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China; (J.-N.Y.); (Z.-X.Y.); (M.-N.C.); (P.-P.R.); (C.N.); (Z.-T.S.); (J.-P.C.); (C.-X.Z.); (J.-M.L.)
| | - Jian-Ping Chen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of Ministry of Agriculture and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China; (J.-N.Y.); (Z.-X.Y.); (M.-N.C.); (P.-P.R.); (C.N.); (Z.-T.S.); (J.-P.C.); (C.-X.Z.); (J.-M.L.)
- College of Forestry, Nanjing Forestry University, Nanjing 210037, China
| | - Chuan-Xi Zhang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of Ministry of Agriculture and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China; (J.-N.Y.); (Z.-X.Y.); (M.-N.C.); (P.-P.R.); (C.N.); (Z.-T.S.); (J.-P.C.); (C.-X.Z.); (J.-M.L.)
| | - Jun-Min Li
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of Ministry of Agriculture and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China; (J.-N.Y.); (Z.-X.Y.); (M.-N.C.); (P.-P.R.); (C.N.); (Z.-T.S.); (J.-P.C.); (C.-X.Z.); (J.-M.L.)
| | - Qianzhuo Mao
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Key Laboratory of Biotechnology in Plant Protection of Ministry of Agriculture and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China; (J.-N.Y.); (Z.-X.Y.); (M.-N.C.); (P.-P.R.); (C.N.); (Z.-T.S.); (J.-P.C.); (C.-X.Z.); (J.-M.L.)
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21
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Beltrí R, Monteiro HR, Toubarro D, Simões N, Garriga A. Biocontrol potential of six Heterorhabditis bacteriophora strains isolated in the Azores Archipelago. J Helminthol 2024; 98:e43. [PMID: 38800903 DOI: 10.1017/s0022149x24000336] [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: 05/29/2024]
Abstract
Entomopathogenic nematodes (EPNs) are closely associated with Popillia japonica and potentially used as their biological control agents, although field results proved inconsistent and evoked a continual pursuit of native EPNs more adapted to the environment. Therefore, we surveyed the Azorean Archipelago to isolate new strains of Heterorhabditis bacteriophora and to evaluate their virulence against the model organism Galleria mellonella under laboratory conditions. Six strains were obtained from pasture and coastal environments and both nematode and symbiont bacteria were molecularly identified. The bioassays revealed that Az172, Az186, and Az171 presented high virulence across the determination of a lethal dose (LD50) and short exposure time experiments with a comparable performance to Az29. After 72 hours, these virulent strains presented a mean determination of a lethal dose of 11 infective juveniles cm-2, a lethal time (LT50) of 34 hours, and achieved 40% mortality after an initial exposure time of only 60 minutes. Az170 exhibited an intermediate performance, whereas Az179 and Az180 were classified as low virulent strains. However, both strains presented the highest reproductive potential with means of 1700 infective juveniles/mg of larvae. The bioassays of the native EPNs obtained revealed that these strains hold the potential to be used in biological control initiatives targeting P. japonica because of their high virulence and locally adapted to environmental conditions.
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Affiliation(s)
- R Beltrí
- Centro de Biotecnologia dos Açores, Faculdade de Ciências e Tecnologia, Universidade dos Açores, 9500-321Ponta Delgada, Portugal
| | - H R Monteiro
- Centro de Biotecnologia dos Açores, Faculdade de Ciências e Tecnologia, Universidade dos Açores, 9500-321Ponta Delgada, Portugal
| | - D Toubarro
- Centro de Biotecnologia dos Açores, Faculdade de Ciências e Tecnologia, Universidade dos Açores, 9500-321Ponta Delgada, Portugal
| | - N Simões
- Centro de Biotecnologia dos Açores, Faculdade de Ciências e Tecnologia, Universidade dos Açores, 9500-321Ponta Delgada, Portugal
| | - A Garriga
- Departament de Biologia Animal, Biologia Vegetal i Ecologia, Facultat de Biociències, Universitat Autònoma de Barcelona, 08193Bellaterra, Spain
- Centro de Biotecnologia dos Açores, Faculdade de Ciências e Tecnologia, Universidade dos Açores, 9500-321Ponta Delgada, Portugal
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22
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Ganassi S, Di Domenico C, Altomare C, Grazioso P, Di Cillo P, Pietrantonio L, De Cristofaro A. Efficacy of entomopathogenic fungi against Philaenus spumarius, the vector of Xylella fastidosa. PEST MANAGEMENT SCIENCE 2024. [PMID: 38769855 DOI: 10.1002/ps.8164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 04/24/2024] [Accepted: 04/30/2024] [Indexed: 05/22/2024]
Abstract
BACKGROUND Xylella fastidiosa is an important causative agent of Olive Quick Decline Syndrome in the Apulia region of Italy. The current study evaluated the bioefficacy of three entomopathogenic fungal strains: Beauveria bassiana SGB7004, Metarhizium robertsii SGB1K, and Akanthomyces lecanii SGB4711 against Philaenus spumarius the main vector of this pathogen, under laboratory conditions. Pathogenicity bioassays were performed by dipping nymphs and adults of P. spumarius in an aqueous suspension of powdered fungal culture (PFC) or conidial suspension (CS) of the three fungal strains. RESULTS Both B. bassiana SGB7004 and M. robertsii SGB1K affected the viability of nymphs, resulting in more than 80% mortality at 48 h post treatment, while the effect of A. lecanii SGB4711 was not statistically significant. On adults, all three biocontrol strains were effective in a time- and concentration-dependent manner. The PFCs of B. bassiana SGB7004, M. robertsii SGB1K, and A. lecanii SGB4711 at the highest concentration tested (120 mg mL-1) resulted in 97%, 83% and 27% mortality at the trial endpoint (120 h), respectively. Mycelial growth was observed on 38.5%, 37.0% and 61.5% of dead insects treated with B. bassiana SGB7004 (2.3 × 108 CFU mL-1), M. robertsii SGB1K (3.8 × 106 CFU mL-1) and A. lecanii SGB4711 (5.4 × 108 CFU mL-1), respectively. None of the PFCs of the tested strains was pathogenic when injected into nymph spittle. CONCLUSIONS Beauveria bassiana SGB7004 and M. robertsii SGB1K significantly affected the survival of P. spumarius nymphs and adults, while A. lecanii SGB4711 was not effective on nymphs and only slightly effective against adults. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Sonia Ganassi
- Department of Agricultural, Environmental and Food Sciences, University of Molise, Campobasso, Italy
| | - Carmela Di Domenico
- Department of Agricultural, Environmental and Food Sciences, University of Molise, Campobasso, Italy
| | | | - Pasqualina Grazioso
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | | | | | - Antonio De Cristofaro
- Department of Agricultural, Environmental and Food Sciences, University of Molise, Campobasso, Italy
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Fu QM, Fang Z, Ren L, Wu QS, Zhang JB, Liu QP, Tan LT, Weng QB. Partial Alleviation of Homologous Superinfection Exclusion of SeMNPV Latently Infected Cells by G1 Phase Infection and G2/M Phase Arrest. Viruses 2024; 16:736. [PMID: 38793618 PMCID: PMC11126141 DOI: 10.3390/v16050736] [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: 02/25/2024] [Revised: 05/02/2024] [Accepted: 05/03/2024] [Indexed: 05/26/2024] Open
Abstract
Viral infection can regulate the cell cycle, thereby promoting viral replication. Hijacking and altering the cell cycle are important for the virus to establish and maintain a latent infection. Previously, Spodoptera exigua multiple nucleopolyhedrovirus (SeMNPV)-latently infected P8-Se301-C1 cells, which grew more slowly than Se301 cells and interfered with homologous SeMNNPV superinfection, were established. However, the effects of latent and superinfection with baculoviruses on cell cycle progression remain unknown. In this study, the cell cycle profiles of P8-Se301-C1 cells and SeMNPV or Autographa californica multiple nucleopolyhedrovirus (AcMNPV)-infected P8-Se301-C1 cells were characterized by flow cytometry. The results showed that replication-related genes MCM4, PCNA, and BAF were down-regulated (p < 0.05) in P8-Se301-C1 cells, and the S phase of P8-Se301-C1 cells was longer than that of Se301 cells. P8-Se301-C1 cells infected with SeMNPV did not arrest in the G2/M phase or affect the expression of Cyclin B and cyclin-dependent kinase 1 (CDK1). Furthermore, when P8-Se301-C1 cells were infected with SeMNPV after synchronized treatment with hydroxyurea and nocodazole, light microscopy and qRT-PCR analysis showed that, compared with unsynchronized cells and S and G2/M phase cells, SeMNPV-infected P8-Se301-C1 cells in G1 phase induced G2/M phase arrest, and the amount of virus adsorption and intracellular viral DNA replication were significantly increased (p < 0.05). In addition, budded virus (BV) production and occlusion body (OB)-containing cells were both increased at 120 h post-infection (p < 0.05). The expression of Cyclin B and CDK1 was significantly down-regulated at 48 h post-infection (p < 0.05). Finally, the arrest of SeMNPV-infected G1 phase cells in the G2/M phase increased BV production (p < 0.05) and the number of OB-containing cells. In conclusion, G1 phase infection and G2/M arrest are favorable to SeMNPV proliferation in P8-Se301-C1 cells, thereby alleviating the homologous superinfection exclusion. The results contribute to a better understanding of the relationship between baculoviruses and insect cell cycle progression and regulation.
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Affiliation(s)
- Qi-Ming Fu
- School of Life Sciences, Guizhou Normal University, Guiyang 550025, China; (Q.-M.F.); (Z.F.); (L.R.); (Q.-S.W.); (J.-B.Z.); (Q.-P.L.); (L.-T.T.)
| | - Zheng Fang
- School of Life Sciences, Guizhou Normal University, Guiyang 550025, China; (Q.-M.F.); (Z.F.); (L.R.); (Q.-S.W.); (J.-B.Z.); (Q.-P.L.); (L.-T.T.)
| | - Lou Ren
- School of Life Sciences, Guizhou Normal University, Guiyang 550025, China; (Q.-M.F.); (Z.F.); (L.R.); (Q.-S.W.); (J.-B.Z.); (Q.-P.L.); (L.-T.T.)
| | - Qing-Shan Wu
- School of Life Sciences, Guizhou Normal University, Guiyang 550025, China; (Q.-M.F.); (Z.F.); (L.R.); (Q.-S.W.); (J.-B.Z.); (Q.-P.L.); (L.-T.T.)
| | - Jun-Bo Zhang
- School of Life Sciences, Guizhou Normal University, Guiyang 550025, China; (Q.-M.F.); (Z.F.); (L.R.); (Q.-S.W.); (J.-B.Z.); (Q.-P.L.); (L.-T.T.)
| | - Qiu-Ping Liu
- School of Life Sciences, Guizhou Normal University, Guiyang 550025, China; (Q.-M.F.); (Z.F.); (L.R.); (Q.-S.W.); (J.-B.Z.); (Q.-P.L.); (L.-T.T.)
| | - Lei-Tao Tan
- School of Life Sciences, Guizhou Normal University, Guiyang 550025, China; (Q.-M.F.); (Z.F.); (L.R.); (Q.-S.W.); (J.-B.Z.); (Q.-P.L.); (L.-T.T.)
| | - Qing-Bei Weng
- School of Life Sciences, Guizhou Normal University, Guiyang 550025, China; (Q.-M.F.); (Z.F.); (L.R.); (Q.-S.W.); (J.-B.Z.); (Q.-P.L.); (L.-T.T.)
- College of Biological Science and Agriculture, Qiannan Normal University for Nationalities, Duyun 558000, China
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Senthil Kumar CM, D'Silva S, Praveena R, Kaprakkaden A, Athira Krishnan LR, Balaji Rajkumar M, Srinivasan V, Dinesh R. Zinc solubilization and organic acid production by the entomopathogenic fungus, Metarhizium pingshaense sheds light on its key ecological role in the environment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 923:171348. [PMID: 38438046 DOI: 10.1016/j.scitotenv.2024.171348] [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: 12/24/2023] [Revised: 02/19/2024] [Accepted: 02/27/2024] [Indexed: 03/06/2024]
Abstract
We report for the first-time higher zinc (Zn) solubilization efficiency and plant growth promotion by an entomopathogenic fungus (EPF), Metarhizium pingshaense IISR-EPF-14, which was earlier isolated from Conogethes punctiferalis, a pest of global importance. The Zn solubilizing efficiency of the fungus varied depending on the type of insoluble source of Zn used, which was observed to be 1.6 times higher in Zn3(PO4)2-amended media compared to ZnO media. In liquid media, there was a 6.2-fold increase in available Zn in ZnO-amended media, whereas a 20.2-fold increase in available Zn was recorded in Zn3(PO4)2 medium. We ascribe the production of various organic acids such as gluconic, keto-gluconic, oxalic, tartaric, malonic, succinic and formic acids, which in general, interact with insoluble Zn sources and make them soluble by forming metal cations and displacing anions as the major mechanism for Zn solubilization by M. pingshaense. However, the type and amount of organic acid produced in the media varied depending on the source of Zn used and the incubation period. Application of the fungus alone and in combination with insoluble Zn sources enhanced various plant growth parameters in rice and cardamom plants. Moreover, the uptake of Zn in rice plants was enhanced up to ~2.5-fold by fungal application. The fungus also exhibited various other plant growth-promoting traits, such as production of Indole-3-acetic acid, ammonia, siderophores, solubilization of mineral phosphate, and production of hydrolytic enzymes such as α-amylase, protease, and pectinase. Hence, apart from its use as a biological control agent, M. pingshaense has the potential to be used as a bio-fortifier to enhance the solubilization and uptake of Zn from nutrient poor soils under field conditions. Our findings shed light on the broader ecological role played by this fungus and widen its scope for utilization in sustainable agriculture.
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Affiliation(s)
- C M Senthil Kumar
- Division of Crop Protection, ICAR - Indian Institute of Spices Research, Marikunnu P.O., Kozhikode 673 012, Kerala, India.
| | - Sharon D'Silva
- Division of Crop Protection, ICAR - Indian Institute of Spices Research, Marikunnu P.O., Kozhikode 673 012, Kerala, India
| | - R Praveena
- Division of Crop Protection, ICAR - Indian Institute of Spices Research, Marikunnu P.O., Kozhikode 673 012, Kerala, India
| | - Anees Kaprakkaden
- Division of Crop Production and Post-Harvest Technology, ICAR - Indian Institute of Spices Research, Marikunnu P.O., Kozhikode 673 012, Kerala, India
| | - L R Athira Krishnan
- Division of Crop Protection, ICAR - Indian Institute of Spices Research, Marikunnu P.O., Kozhikode 673 012, Kerala, India
| | - M Balaji Rajkumar
- ICAR - Indian Institute of Spices Research, Regional Station, Appangala, Madikeri - 571 201, Karnataka, India
| | - V Srinivasan
- Division of Crop Production and Post-Harvest Technology, ICAR - Indian Institute of Spices Research, Marikunnu P.O., Kozhikode 673 012, Kerala, India
| | - R Dinesh
- Division of Crop Production and Post-Harvest Technology, ICAR - Indian Institute of Spices Research, Marikunnu P.O., Kozhikode 673 012, Kerala, India
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25
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Price CSV, Campbell H, Pope TW. Assessing the potential of biopesticides to control the cabbage stem flea beetle Psylliodes chrysocephala. PEST MANAGEMENT SCIENCE 2024; 80:2471-2479. [PMID: 37622417 DOI: 10.1002/ps.7746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 08/15/2023] [Accepted: 08/25/2023] [Indexed: 08/26/2023]
Abstract
BACKGROUND Cabbage stem flea beetle (CSFB) is an economically important pest of oilseed rape crops in Europe that was effectively controlled by neonicotinoid insecticide seed treatments until they were banned by the European Union in 2013. Since then, CSFB has been a difficult pest to control effectively, in part due to many populations having developed resistance to pyrethroids, the only authorized insecticides used to control this pest in many countries. Alternative solutions are therefore necessary, such as biopesticides. We tested an entomopathogenic fungus, three entomopathogenic bacteria isolates, two fatty acids and azadirachtin against CSFB adults under laboratory conditions. We also tested the efficacy of the pyrethroid insecticide lambda-cyhalothrin. RESULTS Fatty acids were effective, with up to 100% CSFB mortality after 24 h. The entomopathogenic fungus Beauveria bassiana resulted in up to 56% mortality 14 days after treatment. Entomopathogenic bacteria formulations and azadirachtin were not effective (<50% and <40% mortality, respectively). Results from a bioassay using lambda-cyhalothrin indicated that the CSFB used in this study were resistant to this insecticide. CONCLUSION Entomopathogenic fungi and fatty acids could potentially be used to control CSFB as part of an integrated pest management programme. This study is the first to investigate the efficacy of different biopesticides to control CSFB under laboratory conditions. As such, these biopesticides require further testing to optimise the formulation and application methods, and to assess the impact on nontarget organisms. Finally, efficacy under field conditions must be determined to understand the influence of environmental variables. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
| | - Heather Campbell
- Centre for Crop and Environmental Science, Agriculture and Environment Department, Harper Adams University, Newport, UK
| | - Tom William Pope
- Centre for Crop and Environmental Science, Agriculture and Environment Department, Harper Adams University, Newport, UK
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Yarahmadi A, Zare M, Aghayari M, Afkhami H, Jafari GA. Therapeutic bacteria and viruses to combat cancer: double-edged sword in cancer therapy: new insights for future. Cell Commun Signal 2024; 22:239. [PMID: 38654309 PMCID: PMC11040964 DOI: 10.1186/s12964-024-01622-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 04/17/2024] [Indexed: 04/25/2024] Open
Abstract
Cancer, ranked as the second leading cause of mortality worldwide, leads to the death of approximately seven million people annually, establishing itself as one of the most significant health challenges globally. The discovery and identification of new anti-cancer drugs that kill or inactivate cancer cells without harming normal and healthy cells and reduce adverse effects on the immune system is a potential challenge in medicine and a fundamental goal in Many studies. Therapeutic bacteria and viruses have become a dual-faceted instrument in cancer therapy. They provide a promising avenue for cancer treatment, but at the same time, they also create significant obstacles and complications that contribute to cancer growth and development. This review article explores the role of bacteria and viruses in cancer treatment, examining their potential benefits and drawbacks. By amalgamating established knowledge and perspectives, this review offers an in-depth examination of the present research landscape within this domain and identifies avenues for future investigation.
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Affiliation(s)
- Aref Yarahmadi
- Department of Biology, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran
| | - Mitra Zare
- Department of Microbiology, Faculty of Sciences, Kerman Branch, Islamic Azad University, Kerman, Iran
| | - Masoomeh Aghayari
- Department of Microbiology, Faculty of Sciences, Urmia Branch, Islamic Azad University, Urmia, Iran
| | - Hamed Afkhami
- Nervous System Stem Cells Research Center, Semnan University of Medical Sciences, Semnan, Iran.
- Cellular and Molecular Research Center, Qom University of Medical Sciences, Qom, Iran.
- Department of Medical Microbiology, Faculty of Medicine, Shahed University, Tehran, Iran.
| | - Gholam Ali Jafari
- Cellular and Molecular Research Center, Qom University of Medical Sciences, Qom, Iran.
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27
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Touray M, Ulug D, Gulsen SH, Cimen H, Hazir C, Bode HB, Hazir S. Natural products from Xenorhabdus and Photorhabdus show promise as biolarvicides against Aedes albopictus. PEST MANAGEMENT SCIENCE 2024. [PMID: 38619291 DOI: 10.1002/ps.8127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 04/04/2024] [Accepted: 04/10/2024] [Indexed: 04/16/2024]
Abstract
BACKGROUND In the perpetual struggle to manage mosquito populations, there has been increasing demand for the development of biopesticides to supplant/complement current products. The insecticidal potential of Xenorhabdus and Photorhabdus has long been recognized and is of interest for the control of important mosquitoes like Aedes albopictus which vectors over 20 different arboviruses of global public health concern. RESULTS The larvicidal effects of cell-free supernatants, cell growth cultures and cell mass of an extensive list of Xenorhabdus and Photorhabdus spp. was investigated. They were quite effective against Ae. albopictus causing larval mortality ranging between 52-100%. Three Photorhabdus spp. and 13 Xenorhabdus spp. release larvicidal compounds in cell-free supernatants. Cell growth culture of all tested species exhibited larvicidal activity, except for Xenorhabdus sp. TS4. Twenty-one Xenorhabdus and Photorhabdus bacterial cells (pellet) exhibited oral toxicity (59-91%) against exposed larvae. The effect of bacterial supernatants on the mosquito eggs were also assessed. Bacterial supernatants inhibited the hatching of mosquito eggs; when unhatched eggs were transferred to clean water, they all hatched. Using the easyPACId approach, the larvicidal compounds in bacterial supernatant were identified as fabclavine from X. szentirmaii and xencoumacin from X. nematophila (causing 98 and 70% mortality, respectively, after 48 h). Xenorhabdus cabanillasii and X. hominickii fabclavines were as effective as commercial Bacillus thuringiensis subsp. israelensis and spinosad products within 5 days post-application (dpa). CONCLUSION Fabclavine and xenocoumacin can be developed into novel biolarvicides, can be used as a model to synthesize other compounds or/and can be combined with other commercial biolarvicides. © 2024 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Mustapha Touray
- Department of Biology, Faculty of Science, Aydin Adnan Menderes University, Aydın, Turkey
| | - Derya Ulug
- Department of Biology, Faculty of Science, Aydin Adnan Menderes University, Aydın, Turkey
| | - Sebnem Hazal Gulsen
- Department of Biology, Faculty of Science, Aydin Adnan Menderes University, Aydın, Turkey
- Department of Plant and Animal Production, Kocarli Vocational School, Aydin Adnan Menderes University, Aydın, Turkey
| | - Harun Cimen
- Recombinant DNA and Recombinant Protein Center, Aydın Adnan Menderes University, Aydın, Turkey
| | - Canan Hazir
- Aydin Health Services Vocational School, Adnan Menderes University, Aydın, Turkey
| | - Helge B Bode
- Max-Planck-Institute for Terrestrial Microbiology, Department of Natural Products in Organismic Interactions, Marburg, Germany
- Molekulare Biotechnologie, Fachbereich Biowissenschaften, Goethe Universität Frankfurt, Frankfurt, Germany
- Center for Synthetic Microbiology, Phillips University Marburg, Marburg, Germany
- Department of Chemistry, Phillips University Marburg, Marburg, Germany
- Senckenberg Gesellschaft für Naturforschung, Frankfurt am Main, Germany
| | - Selcuk Hazir
- Department of Biology, Faculty of Science, Aydin Adnan Menderes University, Aydın, Turkey
- Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, India
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Fichant A, Lanceleur R, Hachfi S, Brun-Barale A, Blier AL, Firmesse O, Gallet A, Fessard V, Bonis M. New Approach Methods to Assess the Enteropathogenic Potential of Strains of the Bacillus cereus Group, including Bacillus thuringiensis. Foods 2024; 13:1140. [PMID: 38672813 PMCID: PMC11048917 DOI: 10.3390/foods13081140] [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: 02/14/2024] [Revised: 04/03/2024] [Accepted: 04/04/2024] [Indexed: 04/28/2024] Open
Abstract
Bacillus cereus (Bc) is a wide group of Gram-positive and spore-forming bacteria, known to be the etiological agents of various human infections, primarily food poisoning. The Bc group includes enteropathogenic strains able to germinate in the digestive tract and to produce enterotoxins such as Nhe, Hbl, and CytK. One species of the group, Bacillus thuringiensis (Bt), has the unique feature of producing insecticidal crystals during sporulation, making it an important alternative to chemical pesticides to protect crops from insect pest larvae. Nevertheless, several studies have suggested a link between the ingestion of pesticide strains and human cases of food poisoning, calling their safety into question. Consequently, reliable tools for virulence assessment are worth developing to aid decision making in pesticide regulation. Here, we propose complementary approaches based on two biological models, the human intestinal Caco-2 cell line and the insect Drosophila melanogaster, to assess and rank the enteric virulence potency of Bt strains in comparison with other Bc group members. Using a dataset of 48 Bacillus spp. strains, we showed that some Bc group strains, including Bt, were able to induce cytotoxicity in Caco-2 cells with concomitant release of IL-8 cytokine, a landmark of pro-inflammatory response. In the D. melanogaster model, we were able to sort a panel of 39 strains into four different classes of virulence, ranging from no virulence to strong virulence. Importantly, for the most virulent strains, mortality was associated with a loss of intestinal barrier integrity. Interestingly, although strains can share a common toxinotype, they display different degrees of virulence, suggesting the existence of specific mechanisms of virulence expression in vivo in the intestine.
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Affiliation(s)
- Arnaud Fichant
- Laboratory for Food Safety, University Paris-Est, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), 94700 Maisons-Alfort, France; (A.F.); (O.F.)
- Université Côte d’Azur, CNRS, INRAE, ISA, 06903 Sophia-Antipolis, France; (S.H.); (A.B.-B.); (A.G.)
| | - Rachelle Lanceleur
- Fougères Laboratory, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), 35306 Fougères, France; (R.L.); (A.-L.B.); (V.F.)
| | - Salma Hachfi
- Université Côte d’Azur, CNRS, INRAE, ISA, 06903 Sophia-Antipolis, France; (S.H.); (A.B.-B.); (A.G.)
| | - Alexandra Brun-Barale
- Université Côte d’Azur, CNRS, INRAE, ISA, 06903 Sophia-Antipolis, France; (S.H.); (A.B.-B.); (A.G.)
| | - Anne-Louise Blier
- Fougères Laboratory, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), 35306 Fougères, France; (R.L.); (A.-L.B.); (V.F.)
| | - Olivier Firmesse
- Laboratory for Food Safety, University Paris-Est, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), 94700 Maisons-Alfort, France; (A.F.); (O.F.)
| | - Armel Gallet
- Université Côte d’Azur, CNRS, INRAE, ISA, 06903 Sophia-Antipolis, France; (S.H.); (A.B.-B.); (A.G.)
| | - Valérie Fessard
- Fougères Laboratory, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), 35306 Fougères, France; (R.L.); (A.-L.B.); (V.F.)
| | - Mathilde Bonis
- Laboratory for Food Safety, University Paris-Est, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), 94700 Maisons-Alfort, France; (A.F.); (O.F.)
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Christensen T, Dyer LA, Forister ML, Bowers MD, Carper A, Teglas MB, Hurtado P, Smilanich AM. Host plant-mediation of viral transmission and its consequences for a native butterfly. Ecology 2024; 105:e4282. [PMID: 38483138 DOI: 10.1002/ecy.4282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 11/11/2023] [Accepted: 01/18/2024] [Indexed: 04/04/2024]
Abstract
Pathogens play a key role in insect population dynamics, contributing to short-term fluctuations in abundance as well as long-term demographic trends. Two key factors that influence the effects of entomopathogens on herbivorous insect populations are modes of pathogen transmission and larval host plants. In this study, we examined tritrophic interactions between a sequestering specialist lepidopteran, Euphydryas phaeton, and a viral pathogen, Junonia coenia densovirus, on its native host plant, Chelone glabra, and a novel host plant, Plantago lanceolata, to explore whether host plant mediates viral transmission, survival, and viral loads. A two-factor factorial experiment was conducted in the laboratory with natal larval clusters randomly assigned to either the native or novel host plant and crossed with either uninoculated controls or viral inoculation (20% of individuals in the cluster inoculated). Diapausing clusters were overwintered in the laboratory and checked weekly for mortality. At the end of diapause, all surviving individuals were reared to adulthood to estimate survivorship. All individuals were screened to quantify viral loads, and estimate horizontal transmission postmortem. To test for vertical transmission, adults were mated, and the progeny were screened for viral presence. Within virus-treated groups, we found evidence for both horizontal and vertical transmission. Larval clusters reared on the native host plant had slightly higher horizontal transmission. Survival probability was lower in clusters feeding on the native host plant, with inoculated groups reared on the native host plant experiencing complete mortality. Viral loads did not differ by the host plant, although viral loads decreased with increased sequestration of secondary compounds on both host plants. Our results indicate that the use of a novel host plant may confer fitness benefits in terms of survival and reduced viral transmission when larvae feeding on it are infected with this pathogen, supporting hypotheses of potential evolutionary advantages of a host range expansion in the context of tritrophic interactions.
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Affiliation(s)
- Tara Christensen
- Program in Ecology, Evolution, and Conservation Biology, University of Nevada, Reno, Nevada, USA
- Department of Biology, University of Nevada, Reno, Nevada, USA
| | - Lee A Dyer
- Program in Ecology, Evolution, and Conservation Biology, University of Nevada, Reno, Nevada, USA
- Department of Biology, University of Nevada, Reno, Nevada, USA
| | - Matthew L Forister
- Program in Ecology, Evolution, and Conservation Biology, University of Nevada, Reno, Nevada, USA
- Department of Biology, University of Nevada, Reno, Nevada, USA
| | - M Deane Bowers
- Department of Ecology and Evolutionary Biology and Museum of Natural History, University of Colorado, Boulder, Boulder, Colorado, USA
| | - Adrian Carper
- Department of Ecology and Evolutionary Biology and Museum of Natural History, University of Colorado, Boulder, Boulder, Colorado, USA
| | - Mike B Teglas
- Program in Ecology, Evolution, and Conservation Biology, University of Nevada, Reno, Nevada, USA
- Department of Agriculture, Veterinary and Rangeland Sciences, University of Nevada, Reno, Nevada, USA
| | - Paul Hurtado
- Program in Ecology, Evolution, and Conservation Biology, University of Nevada, Reno, Nevada, USA
- Department of Mathematics and Statistics, University of Nevada, Reno, Nevada, USA
| | - Angela M Smilanich
- Program in Ecology, Evolution, and Conservation Biology, University of Nevada, Reno, Nevada, USA
- Department of Biology, University of Nevada, Reno, Nevada, USA
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Fang H, Li M, Yu S, Sun J, Qin Z. Codon usage bias of secretory protein in Fusarium oxysporum f. sp. cubense tropical race 4. J Basic Microbiol 2024; 64:e2300310. [PMID: 38358951 DOI: 10.1002/jobm.202300310] [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: 06/02/2023] [Revised: 01/25/2024] [Accepted: 02/03/2024] [Indexed: 02/17/2024]
Abstract
Banana Fusarium oxysporum f. sp. cubense tropical race 4 (Foc-TR4) is a highly destructive pathogen that infects nearly all major banana cultivars and has a tendency to spread further. Secreted proteins play a crucial role in the process of Fusarium wilt infection in bananas. In this study, we analyzed the codon usage bias (CUB) of the Foc-TR4 classical secretory protein genome for the first time and observed a strong bias toward codons ending with C. We found that 572 out of the 14,543 amino acid sequences in the Foc-TR4 genome exhibited characteristics of classical secretory proteins. The CUB was largely influenced by selection optimization pressure, as indicated by the ENC value and neutral plot analysis. Among the identified codons, such as UCC and CCC, 11 were found to be optimal for Foc-TR4 gene expression. Codons with higher GC content and a C base in the third position showed greater selectivity. The CUB in the secretory proteins encoded by Foc-TR4 provides insights into their evolutionary patterns, contributing to the development and screening of novel and effective antifungal drugs.
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Affiliation(s)
- Hui Fang
- Agricultural Science and Technology Information Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, China
- Medical College, and State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, China
| | - Min Li
- Agricultural Science and Technology Information Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, China
| | - Shenxin Yu
- Agricultural Science and Technology Information Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, China
| | - Jiaman Sun
- Guangxi Crop Genetic Improvement and Biotechnology Laboratory, Guangxi Academy of Agricultural Sciences, Nanning, China
| | - Zelin Qin
- Agricultural Science and Technology Information Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, China
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Ammar A, Singh V, Ilic S, Samiksha F, Marsh A, Rodriguez-Palacios A. Rodent Gut Bacteria Coexisting with an Insect Gut Virus in Parasitic Cysts: Metagenomic Evidence of Microbial Translocation and Co-adaptation in Spatially-Confined Niches. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.22.585885. [PMID: 38562820 PMCID: PMC10983908 DOI: 10.1101/2024.03.22.585885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
In medicine, parasitic cysts or cysticerci (fluid-filled cysts, larval stage of tapeworms) are believed to be sterile (no bacteria), and therein, the treatment of cysticerci infestations of deep extra-intestinal tissues (e.g., brain) relies almost exclusively on the use of antiparasitic medications, and rarely antibiotics. To date, however, it is unclear why common post-treatment complications include abscessation. This study quantified the microbial composition of parasitic cyst contents in a higher-order rodent host, using multi-kingdom shotgun metagenomics, to improve our understanding of gut microbial translocation and adaptation strategies in wild environments. Analysis was conducted on DNA from two hepatic parasitic cysts (Hydatigera (Taeenia) taeniaeformis) in an adult vole mouse (Microtus arvalis), and from feces, liver, and peritoneal fluid of three other vole family members living in a vegetable garden in Ohio, USA. Bacterial metagenomics revealed the presence of gut commensal/opportunistic species, including Parabacteroides distasonis, Klebsiella variicola, Enterococcus faecium, and Lactobacillus acidophilus, inhabiting the cysts. Parabacteroides distasonis and other species were also present outside the cyst in the peritoneal fluid. Remarkably, viral metagenomics revealed various murine viral species, but unexpectedly, it detected an insect-origin virus from the army moth (Pseudaletia/Mythimna unipuncta) known as Mythimna unipuncta granulovirus A (MyunGV-A) in both cysts, and in one fecal and one peritoneal sample from two different voles, indicating survival of the insect virus and adaption in voles. Metagenomics also revealed a significantly lower probability of fungal detection in the cysts compared to other samples (peritoneal fluid, p<0.05; and feces p<0.05), with single taxon detection in each cyst for Malassezia and Pseudophaeomoniella oleicola. The samples with a higher probability of fungi were the peritoneal fluid. In conclusion, commensal/pathobiont bacterial species can inhabit parasitic tapeworm cysts, which needs to be considered during therapeutic decisions of cysticerci or other chronic disease scenarios where immune privileged and spatially restricted ecosystems with limited nutrients and minimal presence of immune cells could facilitate microbial adaptation, such as within gut wall cavitating micropathologies in Crohn's disease.
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Affiliation(s)
- Amro Ammar
- Division of Gastroenterology and Liver Disease, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
- Digestive Health Research Institute, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Vaidhvi Singh
- Division of Gastroenterology and Liver Disease, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
- Digestive Health Research Institute, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Sanja Ilic
- Department of Human Sciences, Human Nutrition and Food Microbiology, Ohio State University, Columbus, OH, USA
| | - Fnu Samiksha
- Department of Cancer Biology, Learner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Antoinette Marsh
- The Veterinary Medical Center Diagnostic Parasitology, The Ohio State University College of Veterinary Medicine Department of Veterinary Preventive Medicine, Columbus, OH, USA
| | - Alex Rodriguez-Palacios
- Division of Gastroenterology and Liver Disease, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
- Digestive Health Research Institute, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
- Department of Molecular Biology and Microbiology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
- University Hospitals Research and Education Institute, University Hospitals Cleveland Medical Center Cleveland, OH 44106, USA
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Guilger-Casagrande M, Migliorini BB, Germano-Costa T, Bilesky-José N, Harada LK, Campos EVR, Gonçalves KC, Polanczyk RA, Fraceto LF, Lima R. Beauveria bassiana biogenic nanoparticles for the control of Noctuidae pests. PEST MANAGEMENT SCIENCE 2024; 80:1325-1337. [PMID: 37903747 DOI: 10.1002/ps.7863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 10/24/2023] [Accepted: 10/31/2023] [Indexed: 11/01/2023]
Abstract
BACKGROUND Biogenic metallic and oxide metal nanoparticles have potential as alternatives for several current problems in agriculture, such as the control of caterpillars which cause huge losses in the production of important crops. In the present study, capped and uncapped silver, iron oxide and titanium dioxide nanoparticles were synthesized from the filtrate of Beauveria bassiana and evaluated in regard to physico-chemical characteristics, capping composition, cytotoxicity, genotoxicity and biological activity on Helicoverpa armigera and Spodoptera frugiperda caterpillars. RESULTS A difference in the physico-chemical parameters of the capped and uncapped nanoparticles was observed, with larger aggregation and lower stability of the uncapped. In regard to the study of the capping, the presence of functional groups of biomolecules as well as the activity of B. bassiana hydrolytic enzymes were observed. Cytotoxic effects on the tested cell lines were not observed and DNA damage levels increased with more intense effects of the uncapped nanoparticles. In regard to the biological activity against Noctuidae pests, the uncapped and capped iron oxide, and uncapped titanium dioxide nanoparticles occasioned higher mortality (76%, 60% and 51%, respectively) but no differences in LC50 were recorded. Moreover, sublethal effects were reported on Helicoverpa armigera whereas Spodoptera frugiperda showed low susceptibility to the nanoparticles. CONCLUSION The results demonstrate that biogenic metallic and oxide metal nanoparticles might show promising effects for the control of caterpillars which cause damage on important agricultural crops. Further investigations are necessary to understand the mechanisms of action and optimize the biological activity of these new nanomaterials. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Mariana Guilger-Casagrande
- Laboratory of Environmental Nanotechnology, São Paulo State University, São Paulo, Brazil
- Laboratory for Evaluation of the Bioactivity and Toxicology of Nanomaterials, University of Sorocaba, São Paulo, Brazil
| | - Bianca Bertolini Migliorini
- Laboratory for Evaluation of the Bioactivity and Toxicology of Nanomaterials, University of Sorocaba, São Paulo, Brazil
| | - Tais Germano-Costa
- Laboratory for Evaluation of the Bioactivity and Toxicology of Nanomaterials, University of Sorocaba, São Paulo, Brazil
| | - Natália Bilesky-José
- Laboratory for Evaluation of the Bioactivity and Toxicology of Nanomaterials, University of Sorocaba, São Paulo, Brazil
| | - Liliam Katsue Harada
- Laboratory of Environmental Nanotechnology, São Paulo State University, São Paulo, Brazil
- Laboratory for Evaluation of the Bioactivity and Toxicology of Nanomaterials, University of Sorocaba, São Paulo, Brazil
| | | | - Kelly Cristina Gonçalves
- Department of Agricultural Science, São Paulo State University, School of Agricultural and Veterinarian Sciences, Jaboticabal, São Paulo, Brazil
| | - Ricardo Antonio Polanczyk
- Department of Agricultural Science, São Paulo State University, School of Agricultural and Veterinarian Sciences, Jaboticabal, São Paulo, Brazil
| | | | - Renata Lima
- Laboratory for Evaluation of the Bioactivity and Toxicology of Nanomaterials, University of Sorocaba, São Paulo, Brazil
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Kgosiemang JL, Ramakuwela T, Figlan S, Cochrane N. Antifungal Effect of Metabolites from Bacterial Symbionts of Entomopathogenic Nematodes on Fusarium Head Blight of Wheat. J Fungi (Basel) 2024; 10:148. [PMID: 38392820 PMCID: PMC10890388 DOI: 10.3390/jof10020148] [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: 01/16/2024] [Revised: 02/05/2024] [Accepted: 02/07/2024] [Indexed: 02/24/2024] Open
Abstract
Fungal diseases such as Fusarium head blight (FHB) are significant biotic stressors, negatively affecting wheat production and quality. This study explored the antifungal activity of the metabolites produced by the bacterial symbionts of entomopathogenic nematodes (EPNs) against FHB-causing Fusarium sp. Fusarium graminearum. To achieve this, the symbiotic bacteria of nine EPN isolates from the EPN collection at the Agricultural Research Council-Small Grains (ARC-SG) were isolated from the cadavers of Galleria mellonella (Lepidoptera: Pyralidae) larvae after infection with EPNs. Broth cultures (crude) and their supernatants (filtered and autoclaved) of each bacterial isolate were used as bacterial metabolite treatments to test their inhibitory effect on the mycelial growth and spore germination of F. graminearum. Mycelial growth inhibition rates varied among both bacterial isolates and treatments. Crude metabolite treatments proved to be more effective than filtered and autoclaved metabolite treatments, with an overall inhibition rate of 75.25% compared to 23.93% and 13.32%, respectively. From the crude metabolite treatments, the Xenorhabdus khoisanae SGI 197 bacterial isolate from Steinernema beitlechemi SGI 197 had the highest mean inhibition rate of 96.25%, followed by Photorhabdus luminescens SGI 170 bacteria isolated from Heterorhabditis bacteriophora SGI 170 with a 95.79% mean inhibition rate. The filtered metabolite treatments of all bacterial isolates were tested for their inhibitory activity against Fusarium graminearum spore germination. Mean spore germination inhibition rates from Xenorhabdus spp. bacterial isolates were higher (83.91 to 96.29%) than those from Photorhabdus spp. (6.05 to 14.74%). The results obtained from this study suggest that EPN symbiotic bacterial metabolites have potential use as biological control agents of FHB. Although field efficacy against FHB was not studied, the significant inhibition of mycelial growth and spore germination suggest that the application of these metabolites at the flowering stage may provide protection to plants against infection with or spread of F. graminearum. These metabolites have the potential to be employed as part of integrated pest management (IPM) to inhibit/delay conidia germination until the anthesis (flowering stage) of wheat seedlings has passed.
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Affiliation(s)
- Julius Leumo Kgosiemang
- Agricultural Research Council-Small Grains, Bethlehem 9701, South Africa
- Department of Agriculture and Animal Health, University of South Africa, Florida 1710, South Africa
| | - Tshimangadzo Ramakuwela
- Agricultural Research Council-Small Grains, Bethlehem 9701, South Africa
- Department of Plant and Soil Sciences, University of Pretoria, Hatfield 0028, South Africa
| | - Sandiswa Figlan
- Department of Agriculture and Animal Health, University of South Africa, Florida 1710, South Africa
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Pedrini N, Fernandes ÉKK, Dubovskiy IM. Multifaceted Beauveria bassiana and Other Insect-Related Fungi. J Fungi (Basel) 2024; 10:142. [PMID: 38392814 PMCID: PMC10890700 DOI: 10.3390/jof10020142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 02/07/2024] [Indexed: 02/24/2024] Open
Abstract
Since Agostino Bassi first isolated the fungal pathogenic agent of the white muscardine in insects (later named Beauveria bassiana in his honor), and Ilya Mechnikov cultivated Metarhizium anisopliae as a first approach to use fungi as pest control agents, many other entomopathogenic fungi have been studied over the last two centuries [...].
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Affiliation(s)
- Nicolás Pedrini
- Biochemistry Research Institute of La Plata (INIBIOLP), CCT La Plata Council of Scientific and Technical Research (CONICET), National University of La Plata (UNLP), Calles 60 y 120, La Plata 1900, Argentina
| | - Éverton K K Fernandes
- Department of Biosciences and Technology, Institute of Tropical Pathology and Public Health, Federal University of Goiás, Goiânia 74690-900, Brazil
| | - Ivan M Dubovskiy
- Laboratory of Biological Plant Protection and Biotechnology, Novosibirsk State Agrarian University, Dobrolubova Str. 160, 630039 Novosibirsk, Russia
- Siberian Federal Scientific Centre of Agro-BioTechnologies of the Russian Academy of Sciences, 630501 Krasnoobsk, Russia
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Geremew D, Shiberu T, Leta A. Isolation, morphological characterization, and screening virulence of Beauveria bassiana and Metarhizium robertsii fungal isolates in Galleria mellonella. F1000Res 2024; 12:827. [PMID: 38434644 PMCID: PMC10905152 DOI: 10.12688/f1000research.134020.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/15/2024] [Indexed: 03/05/2024] Open
Abstract
Background Entomopathogenic fungi exists naturally in plants as an asymptote and have the potential to reduce the population of insect pests through indirect interactions. This study was conducted to detect and characterize the endophytic fungi Beauveria bassiana and Metarhizium robertsii from the rhizosphere soil of tomato plants and their virulence effect on Galleria melonella. Methods From the rhizosphere soil of 40 tomato fields, three Beauveria bassiana and seven Metarhizium robertsii isolates were isolated using the galleria bait method. All fungi isolate were morphologically characterized by their colony color, shape, and surface texture. Isolates with the highest percentages of germination, conidial yield, and radial growth were selected, and their virulence was evaluated on second instar larvae of Galleria melonella under laboratory conditions. Results In this study, Beauveria bassiana showed white colony color and aseptate hyphae, whereas Metarhizium robertsii showed dark green to light green colony color and septate hyphal structures. Maximum spore production and conidial length were obtained by Beauveria bassiana isolate APPRC-27 with 2.67x10 7 spores ml -1 and 3.24 µm, respectively. Colony radial growth rates ranged from 1.73 to 3.24 mm day -1. The results revealed that the highest mortality rate of Galleria melonella (100%) was obtained by Metarhizium robertsii isolates K-61 and K-102 at a concentration of 1x10 8 conidial ml -1 at 7 days post-inoculation. The lowest mortality rate was registered by Metarhizium robertsii isolate RST-11. Conclusions In the present study, isolates that produced the most spores and had the highest germination rates were the most virulent to Galleria mellonella second instar larvae. Therefore, virulent entomopathogenic fungi, Beauveria bassiana and Metarhizium robertsii, are promising bioagents for the control of insect pests.
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Affiliation(s)
- Dereje Geremew
- Ethiopian Institute of Agricultural Research,Ambo Agriculture Research Center, Ambo, Ethiopia
| | | | - Ararsa Leta
- Ambo University, Ambo, Oromia, 1000, Ethiopia
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de Oliveira JL, Gómez I, Sánchez J, Soberón M, Polanczyk RA, Bravo A. Performance insights into spray-dryer microencapsulated Bacillus thuringiensis cry pesticidal proteins with gum arabic and maltodextrin for effective pest control. Appl Microbiol Biotechnol 2024; 108:181. [PMID: 38285209 PMCID: PMC10824793 DOI: 10.1007/s00253-023-12990-7] [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: 08/17/2023] [Revised: 11/28/2023] [Accepted: 12/26/2023] [Indexed: 01/30/2024]
Abstract
Bacillus thuringiensis (Bt) produces crystals composed mainly of Cry pesticidal proteins with insecticidal activity against pests but are highly susceptible to degradation by abiotic factors. In this sense, encapsulation techniques are designed to improve their performance and lifetime. However, the effects of polymeric matrix encapsulation such as gum arabic and maltodextrin by spray-dryer in the mechanisms of action of Bt kurstaki and Bt aizawai are unknown. We analyzed crystal solubilization, protoxin activation, and receptor binding after microencapsulation and compared them with commercial non-encapsulated products. Microencapsulation did not alter protein crystal solubilization, providing 130 kDa (Cry1 protoxin) and 70 kDa (Cry2 protoxin). Activation with trypsin, chymotrypsin, and larval midgut juice was analyzed, showing that this step is highly efficient, and the protoxins were cleaved producing similar ~ 55 to 65 kDa activated proteins for both formulations. Binding assays with brush border membrane vesicles of Manduca sexta and Spodoptera frugiperda larvae provided a similar binding for both formulations. LC50 bioassays showed no significant differences between treatments but the microencapsulated treatment provided higher mortality against S. frugiperda when subjected to UV radiation. Microencapsulation did not affect the mechanism of action of Cry pesticidal proteins while enhancing protection against UV radiation. These data will contribute to the development of more efficient Bt biopesticide formulations. KEY POINTS: • Microencapsulation did not affect the mechanisms of action of Cry pesticidal proteins produced by Bt. • Microencapsulation provided protection against UV radiation for Bt-based biopesticides. • The study's findings can contribute to the development of more efficient Bt biopesticide formulations.
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Affiliation(s)
- Jhones Luiz de Oliveira
- Department of Agricultural Production Sciences, Faculty of Agronomy and Veterinary Sciences, São Paulo State University (UNESP), Jaboticabal, São Paulo, 14884-900, Brazil
- Department of Molecular Microbiology, Instituto de Biotecnología, Universidad Nacional Autónoma de Mexico, Cuernavaca, Morelos, Mexico
| | - Isabel Gómez
- Department of Molecular Microbiology, Instituto de Biotecnología, Universidad Nacional Autónoma de Mexico, Cuernavaca, Morelos, Mexico
| | - Jorge Sánchez
- Department of Molecular Microbiology, Instituto de Biotecnología, Universidad Nacional Autónoma de Mexico, Cuernavaca, Morelos, Mexico
| | - Mario Soberón
- Department of Molecular Microbiology, Instituto de Biotecnología, Universidad Nacional Autónoma de Mexico, Cuernavaca, Morelos, Mexico
| | - Ricardo Antonio Polanczyk
- Department of Agricultural Production Sciences, Faculty of Agronomy and Veterinary Sciences, São Paulo State University (UNESP), Jaboticabal, São Paulo, 14884-900, Brazil.
| | - Alejandra Bravo
- Department of Molecular Microbiology, Instituto de Biotecnología, Universidad Nacional Autónoma de Mexico, Cuernavaca, Morelos, Mexico.
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Peng Y, Yao Y, Pang J, Di T, Du G, Chen B. Genetic Diversity and Virulence Variation of Metarhizium rileyi from Infected Spodoptera frugiperda in Corn Fields. Microorganisms 2024; 12:264. [PMID: 38399668 PMCID: PMC10892884 DOI: 10.3390/microorganisms12020264] [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: 12/11/2023] [Revised: 01/10/2024] [Accepted: 01/22/2024] [Indexed: 02/25/2024] Open
Abstract
Metarhizium rileyi is an entomopathogenic fungus that naturally infects the larvae of Spodoptera frugiperda, and has biocontrol potential. To explore more natural entomopathogenic fungi resources, a total of 31 strains were isolated from 13 prefectures in Yunnan Province. All the strains were identified using morphology and molecular biology. The genetic diversity of the 31 isolates of M. rileyi was analyzed using inter-simple sequence repeat (ISSR) techniques. Seven primers with good polymorphism were selected, and fifty-four distinct amplification sites were obtained by polymerase chain reaction amplification. Among them, 50 were polymorphic sites, and the percentage of polymorphic sites was 94.44%. The thirty-one strains were divided into eight subpopulations according to the regions. The Nei's gene diversity was 0.2945, and the Shannon information index was 0.4574, indicating that M. rileyi had rich genetic diversity. The average total genetic diversity of the subpopulations in the different regions was 0.2962, the gene diversity within the populations was 0.1931, the genetic differentiation coefficient was 0.3482 (>0.25), and the gene flow was 0.9360 (<1). The individual cluster analysis showed that there was no obvious correlation between the genetic diversity of the strains and their geographical origin, which also indicated that the virulence of the strains was not related to their phylogeny. Thus, the genetic distance of the different populations of M. rileyi in Yunnan Province was not related to the geographical distance. The virulence of those 32 strains against the 3rd-instar larvae of S. frugiperda were varied with the differences in geographical locations. On the 10th day of inoculation, seventeen strains had an insect mortality rate of 70.0%, and seven strains had an insect mortality rate of 100%. The half-lethal times of the M. rileyi SZCY201010, XSBN200920, and MDXZ200803 strains against the S. frugiperda larvae were less than 4 d. Thus, they have the potential to be developed into fungal insecticidal agents.
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Affiliation(s)
| | | | | | | | | | - Bin Chen
- Yunnan State Key Laboratory of Conservation and Utilization of Biological Resources, College of Plant Protection, Yunnan Agricultural University, Kunming 650201, China; (Y.P.); (Y.Y.); (J.P.); (T.D.); (G.D.)
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Zhang K, Wang S, Li Y, Yin Y, Zhang X, Zhang Q, Kong X, Liu W, Yao D, Zhang R, Zhang Z. Application of bacteria and bacteriophage cocktails for biological control of houseflies. Parasit Vectors 2024; 17:22. [PMID: 38233948 PMCID: PMC10795258 DOI: 10.1186/s13071-023-06082-8] [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: 09/28/2023] [Accepted: 12/04/2023] [Indexed: 01/19/2024] Open
Abstract
BACKGROUND Houseflies, Musca domestica L., are an ubiquitous pest that can transmit numerous diseases and threaten human health. Increasing insecticide resistance shown by houseflies necessitates the develop new control alternatives. The housefly gut is densely colonized with microorganisms that interact with each other dynamically and benefit the host's health. However, the impact of multiple symbiotic bacteria on the composition of housefly gut microbiota and the host's activities remains unclear. METHODS We isolated and cultured 12 bacterial species from the intestines of housefly larvae. We also isolated seven bacteriophages to precisely target the regulation of certain bacterial species. Using 16S rRNA high-throughput gene sequencing, we analyzed the bacterial diversity after orally administering bacteria/phage cocktails to houseflies. RESULTS Our results showed that larval growth was promoted, the abundance of beneficial bacteria, such as Klebsiella and Enterobacter, was increased and the abundance of harmful bacteria, such as Providencia, Morganella and Pseudomonas, was decreased in housefly larvae fed with the beneficial bacteria cocktail. However, oral administration of both beneficial and harmful bacterial phage cocktails inhibited larval growth, probably due to the drastic alteration of gut flora. Untargeted metabolomics using liquid chromatography-mass spectrometry showed that disturbances in gut microbiota changed the larval metabolite profiles. Feeding experiments revealed that disrupting the intestinal flora suppressed the beneficial bacteria and increased the harmful bacteria, causing changes in the metabolites and inhibiting larval growth. CONCLUSIONS Based on our results, bacteria/phage cocktails are effective tools for regulating the intestinal flora of insects and have a high potential as a biological control agent for incorporation into an integrated pest management program.
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Affiliation(s)
- Kexin Zhang
- Hospital for Skin Diseases, Shandong First Medical University, Jinan, China
- Shandong Provincial Institute of Dermatology and Venereology, Shandong Academy of Medical Sciences, Jinan, China
- Collaborative Innovation Center for the Origin and Control of Emerging Infectious Diseases, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, China
| | - Shumin Wang
- Collaborative Innovation Center for the Origin and Control of Emerging Infectious Diseases, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, China
- School of Life Science, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, China
| | - Ying Li
- Collaborative Innovation Center for the Origin and Control of Emerging Infectious Diseases, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, China
- School of Clinical and Basic Medical Science, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Yansong Yin
- Collaborative Innovation Center for the Origin and Control of Emerging Infectious Diseases, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, China
- School of Clinical and Basic Medical Science, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Xinyu Zhang
- Collaborative Innovation Center for the Origin and Control of Emerging Infectious Diseases, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, China
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Qian Zhang
- Collaborative Innovation Center for the Origin and Control of Emerging Infectious Diseases, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, China
- School of Clinical and Basic Medical Science, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Xinxin Kong
- Collaborative Innovation Center for the Origin and Control of Emerging Infectious Diseases, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, China
- School of Clinical and Basic Medical Science, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Wenjuan Liu
- Collaborative Innovation Center for the Origin and Control of Emerging Infectious Diseases, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, China
- Department of Laboratory Medicine, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Shanwei, China
| | - Dawei Yao
- Shandong Institute of Endocrine and Metabolic Diseases, Shandong First Medical University, Jinan, Shandong, China.
| | - Ruiling Zhang
- Collaborative Innovation Center for the Origin and Control of Emerging Infectious Diseases, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, China.
- School of Clinical and Basic Medical Science, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China.
| | - Zhong Zhang
- School of Life Science, Weifang Medical University, Weifang, China.
- Medical Science and Technology Innovation Center, The First Affiliated Hospital of Shandong First Medical University, Jinan, China.
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Kadanakuppe Thammayya S, Manikyanahalli Chandrashekara K, Chinapolaiah A, Ramesan Syamala R, Kadukothanahalli Veerabhadraiah S, Somanna Gotyal B, Channappa M, Casini R, Mohamed Moussa I, Elansary HO, El-Sabrout AM. Comparative effectiveness of biorational pesticides for management of Phenacoccus solenopsis Tinsley and Paracoccus marginatus Williams & Granara de Willink in Gymnema sylvestre (Retz.) R.Br. ex Sm. Heliyon 2024; 10:e23648. [PMID: 38187271 PMCID: PMC10767387 DOI: 10.1016/j.heliyon.2023.e23648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 11/26/2023] [Accepted: 12/08/2023] [Indexed: 01/09/2024] Open
Abstract
The cotton mealybug, Phenacoccus solenopsis Tinsley and papaya mealybug, Paracoccus marginatus Williams and Granara de Willink (Hemiptera: Pseudococcidae) are becoming major threats to the production of Gymnema sylvestre R. Br. (Asclepiadaceae) in India. Management mainly depends on chemical insecticides which cause a serious problem of pesticide residue and insecticide resistance. The use of biorational insecticides such as biopesticides, botanicals, insect growth regulators, and microbial insecticides is important components of an Integrated Pest Management (IPM) program for successful management. We evaluated the bio-efficacy of twelve biorational insecticides, including entomopathogenic fungi (EPF), using the leaf spray method in laboratory conditions at 25 ± 1 °C, 70 % ± 5 % RH. The results revealed that the highest percent mortality was recorded by acetamiprid 20 % SP (100.00 %), followed by azadirachtin (98.27 %), Lecanicillium muscarium (2 × 109 spores/mL) (85.70 %) and Ocimum sanctum leaf extract (76.87 %) at 120 h after treatment (HAT) in P. solenopsis. In P. marginatus, 100.00 %, 96.39 % and 85.67 % and 74.90 % mortalities were achieved by acetamiprid 20 % SP, azadirachtin, L. muscarium (2 × 109 spores/mL) and O. sanctum leaf extract, respectively, at 120 HAT during the first spray. Various biorational insecticides showed a more or less similar trend of percent mortality in both species during the second spray. In both species, the lowest percent mortality was recorded by Andrographis paniculata leaf extract (46.29, 44.54) and (41.03, 46.39) at 120 Hours after treatment in the first and second spray, respectively. It was concluded that all the prescribed treatments are more effective than the control. Overall, azadirachtin recorded the highest percent mortality after acetamiprid and had the shortest LT50 (12.52 h) and (13.87 h) values in P. solenopsis and P. marginatus, respectively. Our study emphasizes that biopesticides like Azadirachtin 1 % EC (10000 ppm), L. muscarium (2 × 109 spores/mL) (5 mL/L) and O. sanctum leaf extract (5 %) may be recommended as alternatives to synthetic insecticides. Botanicals and EPF would be the most effective approach for sustainable integrated management of P. solenopsis and P. marginatus in the G. sylvestre ecosystem.
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Affiliation(s)
- Shivakumara Kadanakuppe Thammayya
- Division of Genomic Resources, ICAR-National Bureau of Agricultural Insect Resources, Bengaluru, Karnataka, 560024, India
- ICAR-Directorate of Medicinal and Aromatic Plant Research, Anand, Gujarat, 387310, India
| | | | - Akula Chinapolaiah
- ICAR-Directorate of Medicinal and Aromatic Plant Research, Anand, Gujarat, 387310, India
| | - Ramya Ramesan Syamala
- Division of Genomic Resources, ICAR-National Bureau of Agricultural Insect Resources, Bengaluru, Karnataka, 560024, India
| | | | - Bhemanna Somanna Gotyal
- Division of Genomic Resources, ICAR-National Bureau of Agricultural Insect Resources, Bengaluru, Karnataka, 560024, India
| | - Manjunatha Channappa
- Division of Genomic Resources, ICAR-National Bureau of Agricultural Insect Resources, Bengaluru, Karnataka, 560024, India
| | - Ryan Casini
- School of Public Health, University of California, Berkeley, 2121 Berkeley Way, Berkeley, CA, 94704, USA
| | - Ihab Mohamed Moussa
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box-2455, Riyadh, 11451, Saudi Arabia
| | - Hosam O. Elansary
- Plant Production Department, College of Food and Agriculture Sciences, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Ahmed M. El-Sabrout
- Department of Applied Entomology and Zoology, Faculty of Agriculture (EL-Shatby), Alexandria University, Alexandria, 21545, Egypt
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40
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Ma M, Luo J, Li C, Eleftherianos I, Zhang W, Xu L. A life-and-death struggle: interaction of insects with entomopathogenic fungi across various infection stages. Front Immunol 2024; 14:1329843. [PMID: 38259477 PMCID: PMC10800808 DOI: 10.3389/fimmu.2023.1329843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 12/15/2023] [Indexed: 01/24/2024] Open
Abstract
Insects constitute approximately 75% of the world's recognized fauna, with the majority of species considered as pests. Entomopathogenic fungi (EPF) are parasitic microorganisms capable of efficiently infecting insects, rendering them potent biopesticides. In response to infections, insects have evolved diverse defense mechanisms, prompting EPF to develop a variety of strategies to overcome or circumvent host defenses. While the interaction mechanisms between EPF and insects is well established, recent findings underscore that their interplay is more intricate than previously thought, especially evident across different stages of EPF infection. This review primarily focuses on the interplay between EPF and the insect defense strategies, centered around three infection stages: (1) Early infection stage: involving the pre-contact detection and avoidance behavior of EPF in insects, along with the induction of behavioral responses upon contact with the host cuticle; (2) Penetration and intra-hemolymph growth stage: involving the initiation of intricate cellular and humoral immune functions in insects, while symbiotic microbes can further contribute to host resistance; (3) Host insect's death stage: involving the ultimate confrontation between pathogens and insects. Infected insects strive to separate themselves from the healthy population, while pathogens rely on the infected insects to spread to new hosts. Also, we discuss a novel pest management strategy underlying the cooperation between EPF infection and disturbing the insect immune system. By enhancing our understanding of the intricate interplay between EPF and the insect, this review provides novel perspectives for EPF-mediated pest management and developing effective fungal insecticides.
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Affiliation(s)
- Meiqi Ma
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan, China
| | - Jing Luo
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan, China
| | - Chong Li
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan, China
| | - Ioannis Eleftherianos
- Infection and Innate Immunity Laboratory, Department of Biological Sciences, Institute for Biomedical Sciences, The George Washington University, Washington, DC, United States
| | - Wei Zhang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering (Ministry of Education), Guizhou University, Guiyang, China
| | - Letian Xu
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan, China
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Motta LF, Cerrudo CS, Belaich MN. A Comprehensive Study of MicroRNA in Baculoviruses. Int J Mol Sci 2024; 25:603. [PMID: 38203774 PMCID: PMC10778818 DOI: 10.3390/ijms25010603] [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: 11/27/2023] [Revised: 12/19/2023] [Accepted: 12/22/2023] [Indexed: 01/12/2024] Open
Abstract
Baculoviruses are viral pathogens that infect different species of Lepidoptera, Diptera, and Hymenoptera, with a global distribution. Due to their biological characteristics and the biotechnological applications derived from these entities, the Baculoviridae family is an important subject of study and manipulation in the natural sciences. With the advent of RNA interference mechanisms, the presence of baculoviral genes that do not code for proteins but instead generate transcripts similar to microRNAs (miRNAs) has been described. These miRNAs are functionally associated with the regulation of gene expression, both in viral and host sequences. This article provides a comprehensive review of miRNA biogenesis, function, and characterization in general, with a specific focus on those identified in baculoviruses. Furthermore, it delves into the specific roles of baculoviral miRNAs in regulating viral and host genes and presents structural and thermodynamic stability studies that are useful for detecting shared characteristics with predictive utility. This review aims to expand our understanding of the baculoviral miRNAome, contributing to improvements in the production of baculovirus-based biopesticides, management of resistance phenomena in pests, enhancement of recombinant protein production systems, and development of diverse and improved BacMam vectors to meet biomedical demands.
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Affiliation(s)
| | - Carolina Susana Cerrudo
- Laboratorio de Ingeniería Genética y Biología Celular y Molecular—Área Virosis de Insectos, Instituto de Microbiología Básica y Aplicada, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Roque Sáenz Peña 352, Bernal B1876BXD, Buenos Aires, Argentina;
| | - Mariano Nicolás Belaich
- Laboratorio de Ingeniería Genética y Biología Celular y Molecular—Área Virosis de Insectos, Instituto de Microbiología Básica y Aplicada, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Roque Sáenz Peña 352, Bernal B1876BXD, Buenos Aires, Argentina;
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Mezione de Carvalho L, Hwang HS, Lee KY. Effect of fluorescent brighteners on the insecticidal activity of Bacillus thuringiensis var. kurstaki and LdMNPV on Lymantria dispar asiatica in Korea. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2024; 115:e22066. [PMID: 38013610 DOI: 10.1002/arch.22066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 11/08/2023] [Accepted: 11/10/2023] [Indexed: 11/29/2023]
Abstract
Stilbene-based fluorescent brighteners (FBs) have been demonstrated to improve the insecticidal activities of entomopathogenic viruses; however, there is limited information regarding their effect on entomopathogenic bacteria. We conducted this study to investigate the effect of two FBs (FB 28 and FB 71) on the insecticidal activities of Bacillus thuringiensis var. kurstaki (Btk) and Lymantria dispar multiple nuclear polyhedrosis virus (LdMNPV) on Lymantria dispar asiatica. FB 28 and Btk combination at low concentration (1.6 × 102 IU/mL) increased the mortality, whereas FB 71 and Btk combination at intermediate and high concentrations (1.6 × 103 and 1.6 × 104 IU/mL) slightly reduced the mortality compared with that with Btk alone. The lethal time was also shorter with combinations of Btk and FB 28 than with FB 71. Both FB 28 and FB 71 increased the mortality in combination with LdMNPV at all concentrations (3 × 102 , 3 × 104 , and 3 × 106 polyhedral occlusion bodies/mL compared with that with LdMNPV alone. Our results suggest that FBs improve the insecticidal activities of Btk and LdMNPV, and their activities depend on their interactions with the midgut structures of the host insect species.
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Affiliation(s)
- Lucas Mezione de Carvalho
- Department of Applied Biology, College of Agriculture and Life Sciences, Kyungpook National University, Daegu, Republic of Korea
| | - Hwal-Su Hwang
- Department of Applied Biology, College of Agriculture and Life Sciences, Kyungpook National University, Daegu, Republic of Korea
- Sustainable Agriculture Research Center, Kyungpook National University, Gunwi, Republic of Korea
| | - Kyeong-Yeoll Lee
- Department of Applied Biology, College of Agriculture and Life Sciences, Kyungpook National University, Daegu, Republic of Korea
- Sustainable Agriculture Research Center, Kyungpook National University, Gunwi, Republic of Korea
- Department of Plant Medicine, College of Agriculture and Life Sciences, Kyungpook National University, Daegu, Republic of Korea
- Institute of Plant Medicine, Kyungpook National University, Daegu, Republic of Korea
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Paixão FRS, Falvo ML, Huarte-Bonnet C, Santana M, García JJ, Fernandes ÉKK, Pedrini N. Pathogenicity of microsclerotia from Metarhizium robertsii against Aedes aegypti larvae and antimicrobial peptides expression by mosquitoes during fungal-host interaction. Acta Trop 2024; 249:107061. [PMID: 37918505 DOI: 10.1016/j.actatropica.2023.107061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 10/23/2023] [Accepted: 10/30/2023] [Indexed: 11/04/2023]
Abstract
Aedes aegypti is a vector of various disease-causing arboviruses. Chemical insecticide-based methods for mosquito control have increased resistance in different parts of the world. Thus, alternative control agents such as the entomopathogenic fungi are excellent candidates to control mosquitoes as part of an ecofriendly strategy. There is evidence of the potential of entomopathogenic fungal conidia and blastospores for biological control of eggs, larval and adult stages, as well as the pathogenicity of fungal microsclerotia against adults and eggs. However, there are no studies on the pathogenicity of microsclerotia against either aquatic insects or insects that develop part of their life cycle in the water, such as the A. aegypti larvae. In this study, we assayed the production of microsclerotia and their pathogenicity against A. aegypti larvae of two isolates of Metarhizium robertsii, i.e., CEP 423 isolated in La Plata, Argentina, and the model ARSEF 2575. Both isolates significantly reduced the survival of A. aegypti exposed to their microsclerotia. The fungus-larva interaction resulted in a delayed response in the host. This was evidenced by the expression of some humoral immune system genes such as defensins and cecropin on the 9th day post-infection, when the fungal infection was consolidated as a successful process that culminates in larvae mortality. In conclusion, M. robertsii microsclerotia are promising propagules to be applied as biological control agents against mosquitoes since they produce pathogenic conidia against A. aegypti larvae.
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Affiliation(s)
- Flávia R S Paixão
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CCT La Plata Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de La Plata (UNLP), calles 60 y 120, 1900 La Plata, Argentina
| | - Marianel L Falvo
- Centro de Estudios Parasitológicos y de Vectores (CEPAVE), CCT La Plata Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de La Plata (UNLP), calles 60 y 122, 1900 La Plata, Argentina
| | - Carla Huarte-Bonnet
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CCT La Plata Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de La Plata (UNLP), calles 60 y 120, 1900 La Plata, Argentina
| | - Marianela Santana
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CCT La Plata Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de La Plata (UNLP), calles 60 y 120, 1900 La Plata, Argentina
| | - Juan J García
- Centro de Estudios Parasitológicos y de Vectores (CEPAVE), CCT La Plata Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de La Plata (UNLP), calles 60 y 122, 1900 La Plata, Argentina
| | - Éverton K K Fernandes
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, 74690-900, Goiânia, Goiás, Brazil
| | - Nicolás Pedrini
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CCT La Plata Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de La Plata (UNLP), calles 60 y 120, 1900 La Plata, Argentina.
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Zheng R, Xie M, Keyhani NO, Xia Y. An insect chemosensory protein facilitates locust avoidance to fungal pathogens via recognition of fungal volatiles. Int J Biol Macromol 2023; 253:127389. [PMID: 37827395 DOI: 10.1016/j.ijbiomac.2023.127389] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 09/16/2023] [Accepted: 10/09/2023] [Indexed: 10/14/2023]
Abstract
Locusts (Locusta migratoria) are one of the most destructive insect pests worldwide. Entomopathogenic fungi can infect and kill locusts, with Metarhizium acridum having evolved as a specialized acridid pathogen. However, locusts have evolved countermeasures to limit or avoid microbial pathogens, although the underlying molecular mechanisms behind these defenses remain obscure. Here, we demonstrate that L. migratoria exhibit avoidance behaviors towards M. acridum contaminated food via recognition of fungal volatiles, with locust perception of the volatile mediated by the LmigCSP60 chemosensory protein. RNAi-knockdown of LmigCSP60 lowered locust M. acridum avoidance behavior and increased infection and mortality. The fungal volatile, 2-phenylethanol (PEA), was identified to participate in locust behavioral avoidance. RNAi-knockdown of LmigCSP60 reduced antennal electrophysiological responses to PEA and impaired locust avoidance to the compound. Purified LmigCSP60 was able to bind a set of fungal volatiles including PEA. Furthermore, reduction of PEA emission by M. acridum via construction of a targeted gene knockout mutant of the alcohol dehydrogenase gene (ΔMaAdh strain) that contributes to PEA production reduced locust avoidance behavior towards the pathogen. These findings identify an olfactory circuit used by locusts to detect and avoid potential microbial pathogens before they are capable of initiating infection and highlight behavioral and olfactory adaptations affecting the co-evolution of host-pathogen interactions.
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Affiliation(s)
- Renwen Zheng
- School of Life Sciences, Chongqing University, Chongqing 401331, China; Chongqing Engineering Research Center for Fungal Insecticides, Chongqing 401331, China; Key Laboratory of Gene Function and Regulation Technologies under Chongqing Municipal Education Commission, Chongqing, China; School of Plant Protection, Anhui Agricultural University, Hefei 230036, China; Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, Anhui Agricultural University, Hefei 230036, China.
| | - Mushan Xie
- School of Life Sciences, Chongqing University, Chongqing 401331, China; Chongqing Engineering Research Center for Fungal Insecticides, Chongqing 401331, China; Key Laboratory of Gene Function and Regulation Technologies under Chongqing Municipal Education Commission, Chongqing, China
| | - Nemat O Keyhani
- School of Life Sciences, Chongqing University, Chongqing 401331, China; Department of Biological Sciences, University of Illinois, Chicago, IL 60607, USA.
| | - Yuxian Xia
- School of Life Sciences, Chongqing University, Chongqing 401331, China; Chongqing Engineering Research Center for Fungal Insecticides, Chongqing 401331, China; Key Laboratory of Gene Function and Regulation Technologies under Chongqing Municipal Education Commission, Chongqing, China.
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Rezende TMT, Menezes HSG, Rezende AM, Cavalcanti MP, Silva YMG, de-Melo-Neto OP, Romão TP, Silva-Filha MHNL. Culex quinquefasciatus Resistant to the Binary Toxin from Lysinibacillus sphaericus Displays a Consistent Downregulation of Pantetheinase Transcripts. Biomolecules 2023; 14:33. [PMID: 38254633 PMCID: PMC10813629 DOI: 10.3390/biom14010033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 12/07/2023] [Accepted: 12/11/2023] [Indexed: 01/24/2024] Open
Abstract
Culex quinquefasciatus resistance to the binary (Bin) toxin, the major larvicidal component from Lysinibacillus sphaericus, is associated with mutations in the cqm1 gene, encoding the Bin-toxin receptor. Downregulation of the cqm1 transcript was found in the transcriptome of larvae resistant to the L. sphaericus IAB59 strain, which produces both the Bin toxin and a second binary toxin, Cry48Aa/Cry49Aa. Here, we investigated the transcription profiles of two other mosquito colonies having Bin resistance only. These confirmed the cqm1 downregulation and identified transcripts encoding the enzyme pantetheinase as the most downregulated mRNAs in both resistant colonies. Further quantification of these transcripts reinforced their strong downregulation in Bin-resistant larvae. Multiple genes were found encoding this enzyme in Cx. quinquefasciatus and a recombinant pantetheinase was then expressed in Escherichia coli and Sf9 cells, with its presence assessed in the midgut brush border membrane of susceptible larvae. The pantetheinase was expressed as a ~70 kDa protein, potentially membrane-bound, which does not seem to be significantly targeted by glycosylation. This is the first pantetheinase characterization in mosquitoes, and its remarkable downregulation might reflect features impacted by co-selection with the Bin-resistant phenotype or potential roles in the Bin-toxin mode of action that deserve to be investigated.
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Affiliation(s)
- Tatiana M. T. Rezende
- Department of Entomology, Instituto Aggeu Magalhães-Fiocruz, Recife 50740-465, PE, Brazil; (T.M.T.R.); (H.S.G.M.); (Y.M.G.S.); (T.P.R.)
| | - Heverly S. G. Menezes
- Department of Entomology, Instituto Aggeu Magalhães-Fiocruz, Recife 50740-465, PE, Brazil; (T.M.T.R.); (H.S.G.M.); (Y.M.G.S.); (T.P.R.)
| | - Antonio M. Rezende
- Department of Microbiology, Instituto Aggeu Magalhães-Fiocruz, Recife 50740-465, PE, Brazil; (A.M.R.); (M.P.C.); (O.P.d.-M.-N.)
| | - Milena P. Cavalcanti
- Department of Microbiology, Instituto Aggeu Magalhães-Fiocruz, Recife 50740-465, PE, Brazil; (A.M.R.); (M.P.C.); (O.P.d.-M.-N.)
| | - Yuri M. G. Silva
- Department of Entomology, Instituto Aggeu Magalhães-Fiocruz, Recife 50740-465, PE, Brazil; (T.M.T.R.); (H.S.G.M.); (Y.M.G.S.); (T.P.R.)
| | - Osvaldo P. de-Melo-Neto
- Department of Microbiology, Instituto Aggeu Magalhães-Fiocruz, Recife 50740-465, PE, Brazil; (A.M.R.); (M.P.C.); (O.P.d.-M.-N.)
| | - Tatiany P. Romão
- Department of Entomology, Instituto Aggeu Magalhães-Fiocruz, Recife 50740-465, PE, Brazil; (T.M.T.R.); (H.S.G.M.); (Y.M.G.S.); (T.P.R.)
| | - Maria Helena N. L. Silva-Filha
- Department of Entomology, Instituto Aggeu Magalhães-Fiocruz, Recife 50740-465, PE, Brazil; (T.M.T.R.); (H.S.G.M.); (Y.M.G.S.); (T.P.R.)
- National Institute for Molecular Entomology, Rio de Janeiro 21941-902, RJ, Brazil
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Espín-Sánchez D, Preisegger L, Mazzolenis R, Santana M, Saparrat MCN, Pedrini N, Huarte-Bonnet C. Dark Pigments in Entomopathogenic Fungal Microsclerotia: Preliminary Evidence of a 1,8-Dihydroxynaphthalene-melanin-like Compound in Metarhizium robertsii. J Fungi (Basel) 2023; 9:1162. [PMID: 38132763 PMCID: PMC10744409 DOI: 10.3390/jof9121162] [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: 10/27/2023] [Revised: 11/23/2023] [Accepted: 11/29/2023] [Indexed: 12/23/2023] Open
Abstract
Metarhizium robertsii microsclerotia are fungal aggregates composed of compacted, pigmented hyphae. As they are highly tolerant to desiccation and produce infective conidia, they are promising candidates to be formulated as bioinsecticides. Despite this potential, the nature of the pigments within these structures remains unclear. In this study, routine culture media used for the differentiation of M. robertsii microsclerotia were supplemented with four melanin inhibitors, and the resulting propagules were characterized. Inhibitors of the 1,8-dihydroxynaphthalene (DHN)-melanin biosynthetic pathway such as tricyclazole and guaiacol induced significant phenotypic and molecular modifications in the obtained M. robertsii propagules, which exhibited a more spherical shape, reduced size, and increased susceptibility to desiccation, heat, and oxidative stress than microsclerotia obtained without inhibitors. Additionally, genes encoding for a polyketide synthase (Mrpks2) and a putative 1,3,6,8-tetrahydroxynaphthalene reductase (Mrthnr), potentially involved in the DHN-melanin biosynthetic pathway, were upregulated in fungi grown in the inhibitor-added media. In conclusion, M. robertsii microsclerotia contain melanins of type DHN that might play a role in both microsclerotia differentiation and environmental stress tolerance.
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Affiliation(s)
- Daysi Espín-Sánchez
- Instituto de Investigaciones Bioquímicas de La Plata “Profesor Doctor Rodolfo R. Brenner” (INIBIOLP), Universidad Nacional de La Plata (UNLP)-CCT-La Plata-CONICET, La Plata 1900, Argentina; (D.E.-S.); (L.P.); (R.M.); (M.S.)
| | - Lautaro Preisegger
- Instituto de Investigaciones Bioquímicas de La Plata “Profesor Doctor Rodolfo R. Brenner” (INIBIOLP), Universidad Nacional de La Plata (UNLP)-CCT-La Plata-CONICET, La Plata 1900, Argentina; (D.E.-S.); (L.P.); (R.M.); (M.S.)
| | - Romina Mazzolenis
- Instituto de Investigaciones Bioquímicas de La Plata “Profesor Doctor Rodolfo R. Brenner” (INIBIOLP), Universidad Nacional de La Plata (UNLP)-CCT-La Plata-CONICET, La Plata 1900, Argentina; (D.E.-S.); (L.P.); (R.M.); (M.S.)
| | - Marianela Santana
- Instituto de Investigaciones Bioquímicas de La Plata “Profesor Doctor Rodolfo R. Brenner” (INIBIOLP), Universidad Nacional de La Plata (UNLP)-CCT-La Plata-CONICET, La Plata 1900, Argentina; (D.E.-S.); (L.P.); (R.M.); (M.S.)
| | - Mario C. N. Saparrat
- Instituto de Fisiología Vegetal (INFIVE), Universidad Nacional de La Plata (UNLP)-CCT-La Plata-CONICET, La Plata 1900, Argentina;
| | - Nicolás Pedrini
- Instituto de Investigaciones Bioquímicas de La Plata “Profesor Doctor Rodolfo R. Brenner” (INIBIOLP), Universidad Nacional de La Plata (UNLP)-CCT-La Plata-CONICET, La Plata 1900, Argentina; (D.E.-S.); (L.P.); (R.M.); (M.S.)
| | - Carla Huarte-Bonnet
- Instituto de Investigaciones Bioquímicas de La Plata “Profesor Doctor Rodolfo R. Brenner” (INIBIOLP), Universidad Nacional de La Plata (UNLP)-CCT-La Plata-CONICET, La Plata 1900, Argentina; (D.E.-S.); (L.P.); (R.M.); (M.S.)
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Wang Z, Ogaya C, Dörfler V, Barg M, Ehlers RU, Molina C. Pheno- and genotyping in vitro dauer juvenile recovery in the nematode Heterorhabditis bacteriophora. Appl Microbiol Biotechnol 2023; 107:7181-7196. [PMID: 37733051 DOI: 10.1007/s00253-023-12775-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 08/25/2023] [Accepted: 09/03/2023] [Indexed: 09/22/2023]
Abstract
The entomopathogenic nematode (EPN) Heterorhabditis bacteriophora is an effective biological-control agent of insect pests. The dauer juveniles (DJs) seek for, infect insects, and release cells of the carried symbiotic bacterium of the genus Photorhabdus. Inside the host, the DJs perceive signals from the insect's haemolymph that trigger the exit from the arrested stage and the further development to mature adults. This developmental step is called DJ recovery. In commercial production, a high and synchronous DJ recovery determines the success of liquid-culture mass production. To enhance the understanding about genetic components regulating DJ recovery, more than 160 mutant- and 25 wild type inbred lines (WT ILs) were characterized for DJ recovery induced by cell-free bacterial supernatant. The mutant lines exhibited a broader DJ recovery range than WT ILs (4.6-67.2% vs 1.6-35.7%). A subset of mutant lines presented high variability of virulence against mealworm (Tenebrio molitor) (from 22 to 78% mortality) and mean time survival under oxidative stress (70 mM H2O2; from 10 to 151 h). Genotyping by sequencing of 96 mutant lines resulted in more than 150 single nucleotide polymorphisms (SNPs), of which four results are strongly associated with the DJ recovery trait. The present results are the basis for future approaches in improving DJ recovery by breeding under in vitro liquid-culture mass production in H. bacteriophora. This generated platform of EMS-mutants is as well a versatile tool for the investigation of many further traits of interest in EPNs. KEYPOINTS: • Exposure to bacterial supernatants of Photorhabdus laumondii induces the recovery of Heterorhabditis bacteriophora dauer juveniles (DJs). Both, the bacteria and the nematode partner, influence this response. However, the complete identity of its regulators is not known. • We dissected the genetic component of DJ recovery regulation in H. bacteriophora nematodes by generating a large array of EMS mutant lines and characterizing their recovery pheno- and genotypes. • We determined sets of mutants with contrasting DJ recovery and genotyped a subset of the EMS-mutant lines via genotyping by sequencing (GBS) and identified SNPs with significant correlation to the recovery trait.
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Affiliation(s)
- Zhen Wang
- , e-nema GmbH, Klausdorfer Str. 28-36, 24223, Schwentinental, Germany
- Faculty of Agricultural and Nutritional Sciences, Christian-Albrechts-University Kiel, Hermann-Rodewald-Str. 4, 24118, Kiel, Germany
| | - Christopher Ogaya
- , e-nema GmbH, Klausdorfer Str. 28-36, 24223, Schwentinental, Germany
- Faculty of Agricultural and Nutritional Sciences, Christian-Albrechts-University Kiel, Hermann-Rodewald-Str. 4, 24118, Kiel, Germany
| | - Verena Dörfler
- , e-nema GmbH, Klausdorfer Str. 28-36, 24223, Schwentinental, Germany
| | - Mike Barg
- , e-nema GmbH, Klausdorfer Str. 28-36, 24223, Schwentinental, Germany
| | - Ralf-Udo Ehlers
- , e-nema GmbH, Klausdorfer Str. 28-36, 24223, Schwentinental, Germany
- Faculty of Agricultural and Nutritional Sciences, Christian-Albrechts-University Kiel, Hermann-Rodewald-Str. 4, 24118, Kiel, Germany
- Department of Biology, Ghent University-Campus Ledeganck, Karel Lodewijk Ledeganckstraat 35, 9000, Ghent, Belgium
| | - Carlos Molina
- , e-nema GmbH, Klausdorfer Str. 28-36, 24223, Schwentinental, Germany.
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48
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Shin JH, Lee HK, Lee SC, Han YK. Biological Control of Fusarium oxysporum, the Causal Agent of Fusarium Basal Rot in Onion by Bacillus spp. THE PLANT PATHOLOGY JOURNAL 2023; 39:600-613. [PMID: 38081320 PMCID: PMC10721391 DOI: 10.5423/ppj.oa.08.2023.0118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 10/20/2023] [Accepted: 10/31/2023] [Indexed: 12/17/2023]
Abstract
Fusarium oxysporum is the main pathogen causing Fusarium basal rot in onion (Allium cepa L.), which incurs significant yield losses before and after harvest. Among management strategies, biological control is an environmentally safe and sustainable alternative to chemical control. In this study, we isolated and screened bacteria for antifungal activity against the basal rot pathogen F. oxysporum. Isolates 23-045, 23-046, 23-052, 23-055, and 23-056 significantly inhibited F. oxysporum mycelial growth and conidial germination. Isolates 23-045, 23-046, 23-052, and 23-056 suppressed the development of Fusarium basal rot in both onion seedlings and bulbs in pot and spray inoculation assays. Isolate 23-055 was effective in onion seedlings but exhibited weak inhibitory effect on onion bulbs. Based on analyses of the 16S rRNA and rpoB gene sequences together with morphological analysis, isolates 23-045, 23-046, 23-052, and 23-055 were identified as Bacillus thuringiensis, and isolate 23-056 as Bacillus toyonensis. All five bacterial isolates exhibited cellulolytic, proteolytic, and phosphate-solubilizing activity, which may contribute to their antagonistic activity against onion basal rot disease. Taken together B. thuringiensis 23-045, 23-046, 23-052, and 23-055 and B. toyonensis 23-056 have potential for the biological control of Fusarium basal rot in onion.
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Affiliation(s)
- Jong-Hwan Shin
- Horticultural and Herbal Crop Environment Division, National Institute of Horticultural & Herbal Science, Rural Development Administration, Wanju 55365, Korea
| | - Ha-Kyoung Lee
- Horticultural and Herbal Crop Environment Division, National Institute of Horticultural & Herbal Science, Rural Development Administration, Wanju 55365, Korea
| | - Seong-Chan Lee
- Horticultural and Herbal Crop Environment Division, National Institute of Horticultural & Herbal Science, Rural Development Administration, Wanju 55365, Korea
| | - You-Kyoung Han
- Horticultural and Herbal Crop Environment Division, National Institute of Horticultural & Herbal Science, Rural Development Administration, Wanju 55365, Korea
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Rangel DEN, Acheampong MA, Bignayan HG, Golez HG, Roberts DW. Conidial mass production of entomopathogenic fungi and tolerance of their mass-produced conidia to UV-B radiation and heat. Fungal Biol 2023; 127:1524-1533. [PMID: 38097326 DOI: 10.1016/j.funbio.2023.07.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 04/30/2023] [Accepted: 07/07/2023] [Indexed: 12/18/2023]
Abstract
We investigated conidial mass production of eight isolates of six entomopathogenic fungi (EPF), Aphanocladium album (ARSEF 1329), Beauveria bassiana (ARSEF 252 and 3462), Lecanicillium aphanocladii (ARSEF 6433), Metarhizium anisopliae sensu lato (ARSEF 2341), Metarhizium pingshaense (ARSEF 1545), and Simplicillium lanosoniveum (ARSEF 6430 and 6651) on white or brown rice at four moisture conditions (75-100%). The tolerance of mass-produced conidia of the eight fungal isolates to UV-B radiation and heat (45 °C) were also evaluated. For each moisture content compared, a 20-g sample of rice in a polypropylene bag was inoculated with each fungal isolate in three replicates and incubated at 28 ± 1 °C for 14 days. Conidia were then harvested by washing the substrate, and conidial concentrations determined by haemocytometer counts. Conidial suspensions were inoculated on PDAY with 0.002% benomyl in Petri plates and exposed to 978 mW m-2 of Quaite-weighted UV-B for 2 h. Additionally, conidial suspensions were exposed to 45 °C for 3 h, and aliquots inoculated on PDAY with benomyl. The plates were incubated at 28 ± 1 °C, and germination was assessed at 400 × magnification after 48 h. Conidial production was generally higher on white rice than on brown rice for all fungal species, except for L. aphanocladii ARSEF 6433, regardless of moisture combinations. The 100% moisture condition provided higher conidial production for B. bassiana (ARSEF 252 and ARSEF 3462) and M. anisopliae (ARSEF 2341) isolates, while the addition of 10% peanut oil enhanced conidial yield for S. lanosoniveum isolate ARSEF 6430. B. bassiana ARSEF 3462 on white rice with 100% water yielded the highest conidial production (approximately 1.3 × 1010 conidia g-1 of substrate). Conidia produced on white rice with the different moisture conditions did not differ in tolerance to UV-B radiation or heat. However, high tolerance to UV-B radiation and heat was observed for B. bassiana, M. anisopliae, and A. album isolates. Heat-treated conidia of S. lanosoniveum and L. aphanocladii did not germinate.
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Affiliation(s)
- Drauzio E N Rangel
- Universidade Tecnológica Federal do Paraná, Dois Vizinhos, Paraná, 85660-000, Brazil; Department of Biology, Utah State University, Logan, UT, 84322-5305, USA.
| | - Mavis A Acheampong
- Department of Crop Science, University of Ghana, Legon, P.O. Box LG 44, Accra, Ghana
| | - Helen G Bignayan
- Department of Biology, Utah State University, Logan, UT, 84322-5305, USA; Bureau of Plant Industry, National Mango Research, and Development Center, Jordan, Guimaras, 5045, Philippines
| | - Hernani G Golez
- Department of Biology, Utah State University, Logan, UT, 84322-5305, USA; Bureau of Plant Industry, National Mango Research, and Development Center, Jordan, Guimaras, 5045, Philippines
| | - Donald W Roberts
- Department of Biology, Utah State University, Logan, UT, 84322-5305, USA
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50
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Licona-Juárez KC, Bezerra AVS, Oliveira ITC, Massingue CD, Medina HR, Rangel DEN. Congo red induces trans-priming to UV-B radiation in Metarhizium robertsii. Fungal Biol 2023; 127:1544-1550. [PMID: 38097328 DOI: 10.1016/j.funbio.2023.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 06/09/2023] [Accepted: 06/12/2023] [Indexed: 12/18/2023]
Abstract
Metarhizium spp. is used as a biocontrol agent but is limited because of low tolerance to abiotic stress. Metarhizium robertsii is an excellent study model of fungal pathogenesis in insects, and its tolerance to different stress conditions has been extensively investigated. Priming is the time-limited pre-exposure of an organism to specific stress conditions that increases adaptive response to subsequent exposures. Congo red is a water-soluble azo dye extensively used in stress assays in fungi. It induces morphological changes and weakens the cell wall at sublethal concentrations. Therefore, this chemical agent has been proposed as a stressor to induce priming against other stress conditions in entomopathogenic fungi. This study aimed to evaluate the capacity of Congo red to induce priming in M. robertsii. Conidia were grown on potato dextrose agar with or without Congo red.The tolerance of conidia produced from mycelia grown in these three conditions was evaluated against stress conditions, including osmotic, oxidative, heat, and UV-B radiation. Conidia produced on medium supplemented with Congo red were significantly more tolerant to UV-B radiation but not to the other stress conditions assayed. Our results suggest that Congo red confers trans-priming to UV-B radiation but not for heat, oxidative, or osmotic stress.
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Affiliation(s)
- Karla Cecilia Licona-Juárez
- Universidade Brasil, São Paulo, SP, 08230-030, Brazil; Laboratorio de Biología Molecular, Tecnológico Nacional de Mexico, A. García Cubas 600, Celaya, Guanajuato, 38010, Mexico
| | | | | | | | - Humberto R Medina
- Laboratorio de Biología Molecular, Tecnológico Nacional de Mexico, A. García Cubas 600, Celaya, Guanajuato, 38010, Mexico
| | - Drauzio E N Rangel
- Universidade Tecnológica Federal do Paraná (UTFPR), Dois Vizinhos, PR, 85660-000, Brazil.
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