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Wu Y, Duan B, Lin Q, Liang Y, Du X, Zheng M, Zhu Y, Jiang Z, Li Q, Ni H, Li Z, Chen J. Fermentation of waste water from agar processing with Bacillus subtilis by metabolomic analysis. Appl Microbiol Biotechnol 2024; 108:15. [PMID: 38170310 DOI: 10.1007/s00253-023-12891-9] [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: 07/03/2023] [Revised: 11/01/2023] [Accepted: 11/22/2023] [Indexed: 01/05/2024]
Abstract
Fungal infection has become a major threat to crop loss and affects food safety. The waste water from agar processing industries extraction has a number of active substances, which could be further transformed by microorganisms to synthesize antifungal active substances. In this study, Bacillus subtilis was used to ferment the waste water from agar processing industries extraction to analyze the antifungal activity of the fermentation broth on Alternaria alternata and Alternaria spp. Results showed that 25% of the fermentation broth was the most effective in inhibited A. alternata and Alternaria spp., with fungal inhibition rates of 99.9% and 96.1%, respectively, and a minimum inhibitory concentration (MIC) was 0.156 μg/mL. Metabolomic analysis showed that flavonoid polyphenols such as coniferyl aldehyde, glycycoumarin, glycitin, and procyanidin A1 may enhance the inhibitory activity against the two pathogenic fungal strains. Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis showed that polyphenols involved in the biosynthesis pathways of isoflavonoid and phenylpropanoid were upregulated after fermentation. The laser confocal microscopy analyses and cell conductivity showed that the cytoplasm of fungi treated with fermentation broth was destroyed. This study provides a research basis for the development of new natural antifungal agents and rational use of seaweed agar waste. KEY POINTS: • Bacillus subtilis fermented waste water has antifungal activity • Bacillus subtilis could transform active substances in waste water • Waste water is a potential raw material for producing antifungal agents.
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Affiliation(s)
- Yanyan Wu
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen, 361021, Fujian, China
| | - Boyan Duan
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen, 361021, Fujian, China
| | - Qiaoyan Lin
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen, 361021, Fujian, China
| | - Yingying Liang
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen, 361021, Fujian, China
| | - Xiping Du
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen, 361021, Fujian, China
- Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, Xiamen, 361021, Fujian, China
- Research Center of Food Biotechnology of Xiamen City, Xiamen, 361021, Fujian, China
| | - Mingjing Zheng
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen, 361021, Fujian, China
- Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, Xiamen, 361021, Fujian, China
- Research Center of Food Biotechnology of Xiamen City, Xiamen, 361021, Fujian, China
| | - Yanbing Zhu
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen, 361021, Fujian, China
- Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, Xiamen, 361021, Fujian, China
- Research Center of Food Biotechnology of Xiamen City, Xiamen, 361021, Fujian, China
| | - Zedong Jiang
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen, 361021, Fujian, China
- Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, Xiamen, 361021, Fujian, China
- Research Center of Food Biotechnology of Xiamen City, Xiamen, 361021, Fujian, China
| | - Qingbiao Li
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen, 361021, Fujian, China
- Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, Xiamen, 361021, Fujian, China
- Research Center of Food Biotechnology of Xiamen City, Xiamen, 361021, Fujian, China
| | - Hui Ni
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen, 361021, Fujian, China
- Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, Xiamen, 361021, Fujian, China
- Research Center of Food Biotechnology of Xiamen City, Xiamen, 361021, Fujian, China
- Xiamen Ocean Vocational College, Xiamen, 361021, Fujian, China
| | - Zhipeng Li
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen, 361021, Fujian, China.
- Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, Xiamen, 361021, Fujian, China.
- Research Center of Food Biotechnology of Xiamen City, Xiamen, 361021, Fujian, China.
| | - Jinfang Chen
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen, 361021, Fujian, China.
- College of Harbour and Coastal Engineering, Jimei University, Xiamen, 361021, Fujian, China.
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Sánchez-Torres P, González-Candelas L, Ballester AR. Discovery and Transcriptional Profiling of Penicillium digitatum Genes That Could Promote Fungal Virulence during Citrus Fruit Infection. J Fungi (Basel) 2024; 10:235. [PMID: 38667906 PMCID: PMC11051341 DOI: 10.3390/jof10040235] [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: 02/16/2024] [Revised: 03/15/2024] [Accepted: 03/17/2024] [Indexed: 04/28/2024] Open
Abstract
Green mold caused by Penicillium digitatum (Pers.:Fr.) Sacc is the most prevalent postharvest rot concerning citrus fruits. Using the subtractive suppression hybridization (SSH) technique, different P. digitatum genes have been identified that could be involved in virulence during citrus infection in the early stages, a crucial moment that determines whether the infection progresses or not. To this end, a comparison of two P. digitatum strains with high and low virulence has been carried out. We conducted a study on the gene expression profile of the most relevant genes. The results indicate the importance of transcription and regulation processes as well as enzymes involved in the degradation of the plant cell wall. The most represented expressed sequence tag (EST) was identified as PDIP_11000, associated with the FluG domain, which is putatively involved in the activation of conidiation. It is also worth noting that PDIP_02280 encodes a pectin methyl esterase, a cell wall remodeling protein with a high expression level in the most virulent fungal strains, which is notably induced during citrus infection. Furthermore, within the group with the greatest representation and showing significant induction in the early stages of infection, regulatory proteins (PDIP_68700, PDIP_76160) and a chaperone (PDIP_38040) stand out. To a lesser extent, but not less relevant, it is worth distinguishing different regulatory proteins and transcription factors, such as PDIP_00580, PDIP_49640 and PDIP_78930.
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Affiliation(s)
- Paloma Sánchez-Torres
- Instituto Valenciano de Investigaciones Agrarias (IVIA), Centro de Protección Vegetal y Biotecnología, Moncada, 46113 Valencia, Spain
- Food Biotechnology Department, Instituto de Agroquímica y Tecnología de Alimentos (IATA), Consejo Superior de Investigaciones Científicas (CSIC), Catedrático Agustín Escardino Benlloch 7, Paterna, 46980 Valencia, Spain
| | - Luis González-Candelas
- Food Biotechnology Department, Instituto de Agroquímica y Tecnología de Alimentos (IATA), Consejo Superior de Investigaciones Científicas (CSIC), Catedrático Agustín Escardino Benlloch 7, Paterna, 46980 Valencia, Spain
| | - Ana Rosa Ballester
- Food Biotechnology Department, Instituto de Agroquímica y Tecnología de Alimentos (IATA), Consejo Superior de Investigaciones Científicas (CSIC), Catedrático Agustín Escardino Benlloch 7, Paterna, 46980 Valencia, Spain
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Huang N, Jin X, Wen JT, Zhang YF, Yang X, Wei GY, Wang YK, Qin M. Biocontrol and Growth Promotion Potential of Bacillus subtilis CTXW 7-6-2 against Rhizoctonia solani that Causes Tobacco Target Spot Disease. Pol J Microbiol 2024; 73:29-38. [PMID: 38437465 PMCID: PMC10911660 DOI: 10.33073/pjm-2024-004] [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: 09/15/2023] [Accepted: 12/19/2023] [Indexed: 03/06/2024] Open
Abstract
Fungal diseases form perforated disease spots in tobacco plants, resulting in a decline in tobacco yield and quality. The present study investigated the antagonistic effect of Bacillus subtilis CTXW 7-6-2 against Rhizoctonia solani, its ability to promote the growth of tobacco seedlings, and the expression of disease resistance-related genes for efficient and eco-friendly plant disease control. Our results showed that CTXW 7-6-2 had the most vigorous growth after being cultured for 96 h, and its rate of inhibition of R. solani growth in vitro was 94.02%. The volatile compounds produced by CTXW 7-6-2 inhibited the growth of R. solani significantly (by 96.62%). The fungal growthinhibition rate of the B. subtilis CTXW 7-6-2 broth obtained after high-temperature and no-high-temperature sterile fermentation was low, at 50.88% and 54.63%, respectively. The lipopeptides extracted from the B. subtilis CTXW 7-6-2 fermentation broth showed a 74.88% fungal growth inhibition rate at a concentration of 100 mg/l. Scanning and transmission electron microscopy showed some organelle structural abnormalities, collapse, shrinkage, blurring, and dissolution in the R. solani mycelia. In addition, CTXW 7-6-2 increased tobacco seedling growth and improved leaf and root weight compared to the control. After CTXW 7-6-2 inoculation, tobacco leaves showed the upregulation of the PDF1.2, PPO, and PAL genes, which are closely related to target spot disease resistance. In conclusion, B. subtilis CTXW 7-6-2 may be an efficient biological control agent in tobacco agriculture and enhance plant growth potential.
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Affiliation(s)
- Ning Huang
- Guizhou Province Tobacco Company Guiyang City Company, Guiyang, China
| | - Xin Jin
- Guizhou Province Tobacco Company Guiyang City Company, Guiyang, China
| | - Jin-Tao Wen
- Guizhou Province Tobacco Company Guiyang City Company, Guiyang, China
| | - Yi-Fei Zhang
- Guizhou Province Tobacco Company Guiyang City Company, Guiyang, China
| | - Xu Yang
- Guizhou Province Tobacco Company Guiyang City Company, Guiyang, China
| | - Guang-Yu Wei
- Guizhou Province Tobacco Company Guiyang City Company, Guiyang, China
| | - Yi-Kun Wang
- Guizhou Province Tobacco Company Guiyang City Company, Guiyang, China
| | - Min Qin
- Guizhou Province Tobacco Company Guiyang City Company, Guiyang, China
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Soares Mateus AR, Barros S, Pena A, Sanches-Silva A. The potential of citrus by-products in the development of functional food and active packaging. ADVANCES IN FOOD AND NUTRITION RESEARCH 2023; 107:41-90. [PMID: 37898542 DOI: 10.1016/bs.afnr.2023.06.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/30/2023]
Abstract
Food by-product valorization has become an important research area for promoting the sustainability of the food chain. Citrus fruits are among the most widely cultivated fruit crops worldwide. Citrus by-products, including pomace, seeds, and peels (flavedo and albedo), are produced in large amounts each year. Those by-products have an important economic value due to the high content on bioactive compounds, namely phenolic compounds and carotenoids, and are considered a valuable bio-resource for potential applications in the food industry. However, green extraction techniques are required to ensure their sustainability. This chapter addresses the main components of citrus by-products and their recent applications in food products and active food packaging, towards a circular economy. In addition, the concern regarding citrus by-products contamination (e.g. with pesticides residues and mycotoxins) is also discussed.
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Affiliation(s)
- Ana Rita Soares Mateus
- National Institute of Agrarian and Veterinary Research (INIAV), I.P., Rua dos Lagidos, Lugar da Madalena, Vairão, Vila do Conde, Portugal; University of Coimbra, Pharmacy Faculty, Polo III, Azinhaga de Stª Comba, Coimbra, Portugal; LAQV, REQUIMTE, Food Science and Pharmacology Laboratory, University of Coimbra, Pharmacy Faculty, Polo III, Azinhaga de Stª Comba, Coimbra, Portugal; Animal Science Studies Centre (CECA), ICETA, University of Porto, Apartado, Porto, Portugal
| | - Silvia Barros
- National Institute of Agrarian and Veterinary Research (INIAV), I.P., Rua dos Lagidos, Lugar da Madalena, Vairão, Vila do Conde, Portugal
| | - Angelina Pena
- National Institute of Agrarian and Veterinary Research (INIAV), I.P., Rua dos Lagidos, Lugar da Madalena, Vairão, Vila do Conde, Portugal; LAQV, REQUIMTE, Food Science and Pharmacology Laboratory, University of Coimbra, Pharmacy Faculty, Polo III, Azinhaga de Stª Comba, Coimbra, Portugal
| | - Ana Sanches-Silva
- National Institute of Agrarian and Veterinary Research (INIAV), I.P., Rua dos Lagidos, Lugar da Madalena, Vairão, Vila do Conde, Portugal; University of Coimbra, Pharmacy Faculty, Polo III, Azinhaga de Stª Comba, Coimbra, Portugal; Animal Science Studies Centre (CECA), ICETA, University of Porto, Apartado, Porto, Portugal.
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Deng YJ, Chen Z, Ruan CQ, Xiao RF, Lian HP, Liu B, Chen MC, Wang JP. Antifungal activities of Bacillus velezensis FJAT-52631 and its lipopeptides against anthracnose pathogen Colletotrichum acutatum. J Basic Microbiol 2023. [PMID: 36646522 DOI: 10.1002/jobm.202200489] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 12/08/2022] [Accepted: 01/08/2023] [Indexed: 01/18/2023]
Abstract
This study was aim at investigating antifungal activities of Bacillus velezensis FJAT-52631 and its lipopeptides against Colletotrichum acutatum ex situ and in situ. The results showed that the strain FJAT-52631 and its crude lipopeptides (10 mg/ml) exhibited strong inhibitory effects on growth of C. acutatum FJAT-30256 with an inhibition rate of 75.3% and an inhibition zone diameter of 17.66 mm, respectively. Both the viable bacterial cultures and lipopeptides of FJAT-52631 could delay the onset of loquat anthracnose by 1 day and lower the incidence of loquat anthracnose in situ. The whole cultures of B. velezensis FJAT-52631 displayed a 50% biocontrol efficacy on loquat anthracnose at the fourth day after inoculation, but the crude lipopeptides not. The average lesion diameter of the whole-culture treated group was 5.62 mm, which was smaller than that of control group (6.81 mm). All the three types of lipopeptides including iturin A, fengycin, and surfactin A secreted from the strain FJAT-52631 exhibited antifungal activities. Among them, surfactin A displayed higher antifungal activity at a concentration of 1.25 mg/mL than other two lipopeptides even if at a concentration of 60 mg/mL. Thus, the results indicated that surfactin A produced by FJAT-52631 played a major role in the biocontrol of the loquat anthracnose. Scanning electron microscopy (SEM) observation revealed the structural deformities in the mycelia of C. acutatum. The above results suggested that the antifungal lipopeptides from B. velezensis FJAT-52631 would be potential in biocontrol against anthracnose disease of loquat caused by C. acutatum.
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Affiliation(s)
- Ying-Jie Deng
- Agricultural Bioresources Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, China.,College of Life Science and Technology of Huazhong Agricultural University, Wuhan, China
| | - Zheng Chen
- Agricultural Bioresources Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, China
| | - Chuan-Qing Ruan
- Agricultural Bioresources Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, China
| | - Rong-Feng Xiao
- Agricultural Bioresources Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, China
| | - Heng-Ping Lian
- Shunchang Lehuo Laibu Tourism Development Co., Ltd, Nanping, China
| | - Bo Liu
- Agricultural Bioresources Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, China
| | - Mei-Chun Chen
- Agricultural Bioresources Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, China
| | - Jie-Ping Wang
- Agricultural Bioresources Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, China
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Torres-Rodriguez JA, Reyes-Pérez JJ, Quiñones-Aguilar EE, Hernandez-Montiel LG. Actinomycete Potential as Biocontrol Agent of Phytopathogenic Fungi: Mechanisms, Source, and Applications. PLANTS (BASEL, SWITZERLAND) 2022; 11:3201. [PMID: 36501241 PMCID: PMC9736024 DOI: 10.3390/plants11233201] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/09/2022] [Accepted: 11/17/2022] [Indexed: 06/17/2023]
Abstract
Synthetic fungicides have been the main control of phytopathogenic fungi. However, they cause harm to humans, animals, and the environment, as well as generating resistance in phytopathogenic fungi. In the last few decades, the use of microorganisms as biocontrol agents of phytopathogenic fungi has been an alternative to synthetic fungicide application. Actinomycetes isolated from terrestrial, marine, wetland, saline, and endophyte environments have been used for phytopathogenic fungus biocontrol. At present, there is a need for searching new secondary compounds and metabolites of different isolation sources of actinomycetes; however, little information is available on those isolated from other environments as biocontrol agents in agriculture. Therefore, the objective of this review is to compare the antifungal activity and the main mechanisms of action in actinomycetes isolated from different environments and to describe recent achievements of their application in agriculture. Although actinomycetes have potential as biocontrol agents of phytopathogenic fungi, few studies of actinomycetes are available of those from marine, saline, and wetland environments, which have equal or greater potential as biocontrol agents than isolates of actinomycetes from terrestrial environments.
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Affiliation(s)
- Juan A. Torres-Rodriguez
- Nanotechnology and Microbial Biocontrol Group, Centro de Investigaciones Biológicas del Noroeste, Av. Politécnico Nacional 195, Col. Playa Palo de Santa Rita Sur, La Paz 23090, Mexico
| | - Juan J. Reyes-Pérez
- Facultad de Ciencias Pecuarias, Universidad Técnica Estatal de Quevedo, Av. Quito km 1.5 vía a Santo Domingo, Quevedo 120501, Ecuador
| | - Evangelina E. Quiñones-Aguilar
- Centro de Investigaciones y Asistencia en Tecnología y Diseño del Estado de Jalisco, Camino Arenero, El Bajío del Arenal, Guadalajara 45019, Mexico
| | - Luis G. Hernandez-Montiel
- Nanotechnology and Microbial Biocontrol Group, Centro de Investigaciones Biológicas del Noroeste, Av. Politécnico Nacional 195, Col. Playa Palo de Santa Rita Sur, La Paz 23090, Mexico
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Kumari M, Qureshi KA, Jaremko M, White J, Singh SK, Sharma VK, Singh KK, Santoyo G, Puopolo G, Kumar A. Deciphering the role of endophytic microbiome in postharvest diseases management of fruits: Opportunity areas in commercial up-scale production. FRONTIERS IN PLANT SCIENCE 2022; 13:1026575. [PMID: 36466226 PMCID: PMC9716317 DOI: 10.3389/fpls.2022.1026575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 10/13/2022] [Indexed: 06/17/2023]
Abstract
As endophytes are widely distributed in the plant's internal compartments and despite having enormous potential as a biocontrol agent against postharvest diseases of fruits, the fruit-endophyte-pathogen interactions have not been studied detail. Therefore, this review aims to briefly discuss the colonization patterns of endophytes and pathogens in the host tissue, the diversity and distribution patterns of endophytes in the carposphere of fruits, and host-endophyte-pathogen interactions and the molecular mechanism of the endophytic microbiome in postharvest disease management in fruits. Postharvest loss management is one of the major concerns of the current century. It is considered a critical challenge to food security for the rising global population. However, to manage the postharvest loss, still, a large population relies on chemical fungicides, which affect food quality and are hazardous to health and the surrounding environment. However, the scientific community has searched for alternatives for the last two decades. In this context, endophytic microorganisms have emerged as an economical, sustainable, and viable option to manage postharvest pathogens with integral colonization properties and eliciting a defense response against pathogens. This review extensively summarizes recent developments in endophytic interactions with harvested fruits and pathogens-the multiple biocontrol traits of endophytes and colonization and diversity patterns of endophytes. In addition, the upscale commercial production of endophytes for postharvest disease treatment is discussed.
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Affiliation(s)
- Madhuree Kumari
- Department of Biochemistry, Indian Institute of Science, Bengaluru, India
| | - Kamal A. Qureshi
- Department of Pharmaceutics, Unaizah College of Pharmacy, Qassim University, Unaizah, Saudi Arabia
| | - Mariusz Jaremko
- Smart-Health Initiative (SHI) and Red Sea Research Center (R.S.R.C.), Division of Biological and Environmental Sciences and Engineering (B.E.S.E.), King Abdullah University of Science and Technology (K.A.U.S.T.), Thuwal, Saudi Arabia
| | - James White
- Department of Plant Biology, Rutgers University, The State University of New Jersey, New Brunswick, NJ, United States
| | - Sandeep Kumar Singh
- Division of Microbiology, Indian Council of Agricultural Research (ICAR), New Delhi, India
| | - Vijay Kumar Sharma
- Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi, India
| | | | - Gustavo Santoyo
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Mexico
| | - Gerardo Puopolo
- Center Agriculture Food Environment, University of Trento, Trentino, TN, Italy
| | - Ajay Kumar
- Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi, India
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γ-Cyclodextrin-Encapsulated Cinnamaldehyde for Citrus Preservation and Its Potential Mechanisms against Penicillium digitatum. J Fungi (Basel) 2022; 8:jof8111199. [DOI: 10.3390/jof8111199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 11/07/2022] [Accepted: 11/12/2022] [Indexed: 11/16/2022] Open
Abstract
In this study, a γ-cyclodextrin-cinnamaldehyde inclusion compound (γ-CDCL) was prepared to control green mold caused by Penicillium digitatum (P. digitatum) in citrus. The results showed that the minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC) of γ-CDCL against the mycelial growth of P. digitatum were 2.0 g L−1 and 4.0 g L−1, respectively. Simultaneously, eight × MFC γ-CDCL could effectively reduce the incidence of green mold in citrus fruit without impairment of the fruit qualities, meanwhile, eight × MFC γ-CDCL was comparable to Prochloraz in controlling fruit under natural storage conditions. The structure of γ-CDCL was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform-infrared spectroscopy (FT-IR), and nuclear magnetic resonance (NMR) analyses. Results showed that the successful preparation of γ-CDCL was due to the spatial interaction between H-4,8 of cinnamaldehyde and H-5′ of γ-cyclodextrin. Meanwhile, the cell membrane permeability of P. digitatum was impaired by γ-CDCL through massive accumulation of reactive oxygen species, whereas the cell wall integrity was barely affected. These results indicated that γ-CDCL might inhibit the growth of P. digitatum through a membrane damage mechanism and it is a promising alternative to chemical fungicides in controlling the post-harvest citrus decay.
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Lastochkina O, Aliniaeifard S, SeifiKalhor M, Bosacchi M, Maslennikova D, Lubyanova A. Novel Approaches for Sustainable Horticultural Crop Production: Advances and Prospects. HORTICULTURAE 2022; 8:910. [DOI: 10.3390/horticulturae8100910] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/23/2023]
Abstract
Reduction of plant growth, yield and quality due to diverse environmental constrains along with climate change significantly limit the sustainable production of horticultural crops. In this review, we highlight the prospective impacts that are positive challenges for the application of beneficial microbial endophytes, nanomaterials (NMs), exogenous phytohormones strigolactones (SLs) and new breeding techniques (CRISPR), as well as controlled environment horticulture (CEH) using artificial light in sustainable production of horticultural crops. The benefits of such applications are often evaluated by measuring their impact on the metabolic, morphological and biochemical parameters of a variety of cultures, which typically results in higher yields with efficient use of resources when applied in greenhouse or field conditions. Endophytic microbes that promote plant growth play a key role in the adapting of plants to habitat, thereby improving their yield and prolonging their protection from biotic and abiotic stresses. Focusing on quality control, we considered the effects of the applications of microbial endophytes, a novel class of phytohormones SLs, as well as NMs and CEH using artificial light on horticultural commodities. In addition, the genomic editing of plants using CRISPR, including its role in modulating gene expression/transcription factors in improving crop production and tolerance, was also reviewed.
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Wang S, Wang R, Zhao X, Ma G, Liu N, Zheng Y, Tan J, Qi G. Systemically engineering Bacillus amyloliquefaciens for increasing its antifungal activity and green antifungal lipopeptides production. Front Bioeng Biotechnol 2022; 10:961535. [PMID: 36159666 PMCID: PMC9490133 DOI: 10.3389/fbioe.2022.961535] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Accepted: 08/17/2022] [Indexed: 11/20/2022] Open
Abstract
The biosynthesis of antifungal lipopeptides iturin and fengycin has attracted broad interest; however, there is a bottleneck in its low yield in wild strains. Because the key metabolic mechanisms in the lipopeptides synthesis pathway remain unclear, genetic engineering approaches are all ending up with a single or a few gene modifications. The aim of this study is to develop a systematic engineering approach to improve the antifungal activity and biosynthesis of iturin and fengycin in Bacillus amyloliquefaciens. First, blocking the carbon overflow metabolic pathway to increase precursor supply of the branched-chain amino acids by knockout of bdh, disrupting sporulation to extend the stage for producing antifungal lipopeptides by deletion of kinA, blocking of siderophore synthesis to enhance the availability of amino acids and fatty acids by deletion of dhbF, and increasing Spo0A∼P by deletion of rapA, could improve the antifungal activity by 24%, 10%, 13% and 18%, respectively. Second, the double knockout strain ΔbdhΔkinA, triple knockout strain ΔbdhΔkinAΔdhbF and quadruple knockout strain ΔkinAΔbdhΔdhbFΔrapA could improve the antifungal activity by 38%, 44% and 53%, respectively. Finally, overexpression of sfp in ΔkinAΔbdhΔdhbFΔrapA further increased the antifungal activity by 65%. After purifying iturin and fengycin as standards for quantitative analysis of lipopeptides, we found the iturin titer was 17.0 mg/L in the final engineered strain, which was 3.2-fold of the original strain. After fermentation optimization, the titer of iturin and fengycin reached 31.1 mg/L and 175.3 mg/L in flask, and 123.5 mg/L and 1200.8 mg/L in bioreactor. Compared to the original strain, the iturin and fengycin titer in bioreactor increased by 22.8-fold and 15.9-fold in the final engineered strain, respectively. This study may pave the way for the commercial production of green antifungal lipopeptides, and is also favorable for understanding the regulatory and biosynthetic mechanism of iturin and fengycin.
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Affiliation(s)
- Susheng Wang
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Rui Wang
- Enshi Tobacco Technology Center, Enshi City, Hubei, China
| | - Xiuyun Zhao
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Gaoqiang Ma
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Na Liu
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Yuqing Zheng
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Jun Tan
- Enshi Tobacco Technology Center, Enshi City, Hubei, China
| | - Gaofu Qi
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
- *Correspondence: Gaofu Qi,
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Mohamed TM, Attia MS, El-Sayyad GS, Fathy RM, El-Batal AI. Gamma radiation crosslinking of PVA/myrrh resin thin film for improving the post-harvest time of lemon fruits. RSC Adv 2022; 12:5619-5628. [PMID: 35425529 PMCID: PMC8981498 DOI: 10.1039/d1ra09360f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2021] [Accepted: 01/29/2022] [Indexed: 11/21/2022] Open
Abstract
Preparation of a thin film of polyvinyl alcohol (PVA)/myrrh natural resin using a low gamma irradiation dose (1 kGy) was investigated towards increasing the post-harvest time of lemon fruit. Different analytical techniques, such as Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) spectroscopy, and mapping techniques were used to characterize the prepared thin film. This investigation was carried out to evaluate the effect of different concentrations of myrrh as an edible coating in prolonging shelf life and preserving the quality of lemon fruits (Citrus aurantifolia). Lemons were immersed directly in PVA solution containing 1%, 2%, and 3% concentrations of myrrh and then stored at ambient (25 ± 1 °C) and low (4 ± 1 °C) temperatures. The disease severity, acidity, total soluble solids (TSS), and ascorbic acid contents were tested after the coating with the PVA/myrrh thin film at different temperatures (4 °C and 25 °C) for different storage times (7 and 14 days). The application of different concentrations of the synthesized PVA/myrrh thin film (1%, 2%, and 3%) significantly reduced green mold disease symptoms and disease severity in the lemon fruits. The acidity value (pH value) was the lowest for the 2% myrrh treatment after 7 °C days at 25 °C, followed by the 1% myrrh treatment under the same conditions. The highest TSS was observed after the treatment for 7 days at 25 °C, with a value of 8.1 g dL-1. A high ascorbic acid concentration (33.5 mg dL-1) was noted after coating the lemons with the 1% PVA/myrrh thin film for 7 days at 25 °C. The results show that the application of a PVA/myrrh thin film extends the shelf-life and maintains the quality of lemon fruits by decreasing the levels of evaporation from the fruits and loss of weight due to the delay of the complete ripening stage of the lemon fruits.
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Affiliation(s)
- Tarek M Mohamed
- Polymer Chemistry Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA) P.O Box 29 Cairo Egypt
| | - Mohamed S Attia
- Botany and Microbiology Department, Faculty of Science (Boys), Al-Azhar University Cairo Egypt
| | - Gharieb S El-Sayyad
- Drug Microbiology Lab., Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA) P.O Box 29 Cairo Egypt
| | - Rasha M Fathy
- Drug Microbiology Lab., Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA) P.O Box 29 Cairo Egypt
| | - Ahmed I El-Batal
- Drug Microbiology Lab., Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA) P.O Box 29 Cairo Egypt
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