1
|
Huang Y, Li J, Shan X, Wang H, Duan Y. Bioactivities evaluation of an endophytic bacterial strain Bacillus tequilensis QNF2 inhibiting apple ring rot caused by Botryosphaeria dothidea on postharvest apple fruits. Food Microbiol 2024; 123:104590. [PMID: 39038895 DOI: 10.1016/j.fm.2024.104590] [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: 05/04/2024] [Revised: 06/13/2024] [Accepted: 06/28/2024] [Indexed: 07/24/2024]
Abstract
Apple ring rot, one of the most common apple postharvest diseases during storage, is caused by Botryosphaeria dothidea. Presently, the disease management is primarily dependent on chemical fungicide application. Here we demonstrated an endophyte bacterium Bacillus tequilensis QNF2, isolated from Chinese leek (Allium tuberosum) roots considerably suppressed B. dothidea mycelial growth, with the highest suppression of 73.56 % and 99.5 % in the PDA and PDB medium, respectively in vitro confront experiments. In in vivo experiments, B. tequilensis QNF2 exhibited a control efficacy of 88.52 % and 100 % on ring rot disease on postharvest apple fruits inoculated with B. dothidea disc and dipped into B. dothidea culture, respectively. In addition, B. tequilensis QNF2 volatile organic compounds (VOCs) also manifested markedly inhibition against B. dothidea mycelial growth and the ring rot on postharvest apple fruits. Moreover, B. tequilensis QNF2 severely damaged the mycelial morphology of B. dothidea. Finally, B. tequilensis QNF2 significantly repressed the expression of six pathogenicity-related genes, such as adh, aldh, aldh3, galm, pdc1, pdc2, involved in glycolysis/gluconeogenesis of B. dothidea. The findings of the study proved that B. tequilensis QNF2 was a promising alternative for controlling apple ring rot of postharvest apple fruit.
Collapse
Affiliation(s)
- Yonghong Huang
- College of Horticulture, Qingdao Agricultural University, Qingdao, China; Laboratory of Quality & Safety Risk Assessment for Fruit (Qingdao), Ministry of Agriculture and Rural Affairs, Qingdao, China; National Technology Centre for Whole Process Quality Control of FSEN Horticultural Products (Qingdao), Qingdao, China; Qingdao Key Laboratory of Modern Agriculture Quality and Safety Engineering, Qingdao, China.
| | - Jinghui Li
- College of Horticulture, Qingdao Agricultural University, Qingdao, China; Laboratory of Quality & Safety Risk Assessment for Fruit (Qingdao), Ministry of Agriculture and Rural Affairs, Qingdao, China; National Technology Centre for Whole Process Quality Control of FSEN Horticultural Products (Qingdao), Qingdao, China; Qingdao Key Laboratory of Modern Agriculture Quality and Safety Engineering, Qingdao, China
| | - Xiaoying Shan
- College of Horticulture, Qingdao Agricultural University, Qingdao, China; Laboratory of Quality & Safety Risk Assessment for Fruit (Qingdao), Ministry of Agriculture and Rural Affairs, Qingdao, China; National Technology Centre for Whole Process Quality Control of FSEN Horticultural Products (Qingdao), Qingdao, China; Qingdao Key Laboratory of Modern Agriculture Quality and Safety Engineering, Qingdao, China
| | - Hanting Wang
- College of Horticulture, Qingdao Agricultural University, Qingdao, China; Laboratory of Quality & Safety Risk Assessment for Fruit (Qingdao), Ministry of Agriculture and Rural Affairs, Qingdao, China; National Technology Centre for Whole Process Quality Control of FSEN Horticultural Products (Qingdao), Qingdao, China; Qingdao Key Laboratory of Modern Agriculture Quality and Safety Engineering, Qingdao, China
| | - Yanxin Duan
- College of Horticulture, Qingdao Agricultural University, Qingdao, China; Laboratory of Quality & Safety Risk Assessment for Fruit (Qingdao), Ministry of Agriculture and Rural Affairs, Qingdao, China; National Technology Centre for Whole Process Quality Control of FSEN Horticultural Products (Qingdao), Qingdao, China; Qingdao Key Laboratory of Modern Agriculture Quality and Safety Engineering, Qingdao, China.
| |
Collapse
|
2
|
Ozbil E, Ilktac M, Ogmen S, Isbilen O, Duran Ramirez JM, Gomez J, Walker JN, Volkan E. In vitro antibacterial, antibiofilm activities, and phytochemical properties of Posidonia oceanica (L.) Delile: An endemic Mediterranean seagrass. Heliyon 2024; 10:e35592. [PMID: 39170414 PMCID: PMC11336879 DOI: 10.1016/j.heliyon.2024.e35592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 07/29/2024] [Accepted: 07/31/2024] [Indexed: 08/23/2024] Open
Abstract
In the antibiotic resistance era, utilizing understudied sources for novel antimicrobials or antivirulence agents can provide new advances against antimicrobial resistant pathogens. In this study, we aimed to investigate antibacterial and antibiofilm activities of Posidonia oceanica (L.) Delile against Enterococcus faecalis ATCC 29212, Staphylococcus aureus ATCC 25923, Escherichia coli ATCC 25922 and Klebsiella pneumoniae ATCC 700603 and several S. aureus clinical isolates obtained from medical devices, including patient urinary catheters and breast implant infections, with varying antibiotic recalcitrance profiles. The ethanolic and methanolic extracts from P. oceanica rhizome exhibited significant antibacterial activity against E. faecalis and S. aureus, as well as drug resistant S. aureus clinical isolates. Furthermore, significant antibiofilm activity was observed against S. aureus and E. faecalis treated with ER, MR1, and MR2. P. oceanica extracts also exhibited synergistic antimicrobial activity with ciprofloxacin against E. faecalis, sensitizing E. faecalis to a lower ciprofloxacin concentration. Collectively, our data demonstrate the selective antibacterial and antibiofilm activity of the extracts of P. oceanica against Gram-positive bacteria and clinical isolates along with potentiation of current antibiotics, which suggests that P. oceanica can be further investigated as a potential source for novel therapeutic options in the treatment of drug resistant bacterial infections.
Collapse
Affiliation(s)
- Ertugrul Ozbil
- Faculty of Pharmacy, Eastern Mediterranean University, Famagusta, Northern Cyprus, 99258 via Mersin 10, Turkey
- Faculty of Pharmacy, Department of Pharmaceutical Microbiology, Cyprus International University, Nicosia, Northern Cyprus, 99258 via Mersin 10, Turkey
| | - Mehmet Ilktac
- Faculty of Pharmacy, Eastern Mediterranean University, Famagusta, Northern Cyprus, 99258 via Mersin 10, Turkey
| | - Sultan Ogmen
- Faculty of Pharmacy, Eastern Mediterranean University, Famagusta, Northern Cyprus, 99258 via Mersin 10, Turkey
- Faculty of Pharmacy, Department of Pharmaceutical Microbiology, Cyprus International University, Nicosia, Northern Cyprus, 99258 via Mersin 10, Turkey
| | - Ovgu Isbilen
- Faculty of Pharmacy, Department of Pharmaceutical Microbiology, Cyprus International University, Nicosia, Northern Cyprus, 99258 via Mersin 10, Turkey
- Faculty of Arts and Sciences, Department of Basic Sciences and Humanities, Cyprus International University, Nicosia, Northern Cyprus, 99258 via Mersin 10, Turkey
| | - Jesus M. Duran Ramirez
- Department of Microbiology and Molecular Genetics, McGovern Medical School, University of Texas Health Science Center at Houston, Texas, USA
| | - Jana Gomez
- Department of Microbiology and Molecular Genetics, McGovern Medical School, University of Texas Health Science Center at Houston, Texas, USA
| | - Jennifer N. Walker
- Department of Microbiology and Molecular Genetics, McGovern Medical School, University of Texas Health Science Center at Houston, Texas, USA
- Department of Epidemiology, Human Genetics, and Environmental Science, School of Public Health, University of Texas Health Science Center at Houston, Texas, USA
| | - Ender Volkan
- Faculty of Pharmacy, Department of Pharmaceutical Microbiology, Cyprus International University, Nicosia, Northern Cyprus, 99258 via Mersin 10, Turkey
- Faculty of Arts and Sciences, Department of Basic Sciences and Humanities, Cyprus International University, Nicosia, Northern Cyprus, 99258 via Mersin 10, Turkey
| |
Collapse
|
3
|
Mim J, Sultana MS, Dhar PK, Hasan MK, Dutta SK. Green mediated synthesis of cerium oxide nanoparticles by using Oroxylum indicum for evaluation of catalytic and biomedical activity. RSC Adv 2024; 14:25409-25424. [PMID: 39139232 PMCID: PMC11320963 DOI: 10.1039/d4ra04132a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2024] [Accepted: 08/02/2024] [Indexed: 08/15/2024] Open
Abstract
The present perspective emphasizes the green synthesis of CeO2-NPs using Oroxylum indicum fruit extract. The synthesized NPs were characterized utilizing analytical techniques, including FT-IR, UV-vis, XRD, SEM-EDX, and VSM. Of them, XRD analysis ratifies the cubic fluorite crystal structure along with a particle size of 23.58 nm. EDX results support the presence of cerium and oxygen in a proper ratio. The surface morphology of NPs, however, was scrutinized using SEM. The lower IC50 value (20.8 μg mL-1) of NPs compared to the reference substance, ascorbic acid (33.2 μg mL-1), demonstrates CeO2-NPs to be a compatible antioxidant. Moreover, the drug-releasing capability of CeO2-NPs was a buffer pH-dependent parameter. The acidic pH solution was 20.5%, while the basic pH solution was 16.9%. The drug-releasing capability was analyzed using the Higuchi model and Korsmeyer-Peppas kinetics. The values of the determination coefficient (R 2) were found to be 0.9944 and 0.9834, respectively. The photocatalytic activity of CeO2-NPs was evaluated, considering methylene blue as a model dye. The degradation percentage was attained up to 56.77% after it had been exposed for 150 min. Apart from this, the synthesized NPs were screened against two fungus species, Bipolaris sorokiniana and Fusarium. The percentage of growth was measured at 56% and 49%, respectively.
Collapse
Affiliation(s)
- Jannatul Mim
- Chemistry Discipline, Khulna University Khulna 9208 Bangladesh
| | | | | | - Md Kamrul Hasan
- Chemistry Discipline, Khulna University Khulna 9208 Bangladesh
| | | |
Collapse
|
4
|
Cenobio-Galindo ADJ, Hernández-Fuentes AD, González-Lemus U, Zaldívar-Ortega AK, González-Montiel L, Madariaga-Navarrete A, Hernández-Soto I. Biofungicides Based on Plant Extracts: On the Road to Organic Farming. Int J Mol Sci 2024; 25:6879. [PMID: 38999990 PMCID: PMC11241162 DOI: 10.3390/ijms25136879] [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: 05/13/2024] [Revised: 06/11/2024] [Accepted: 06/20/2024] [Indexed: 07/14/2024] Open
Abstract
Phytopathogenic fungi are responsible for diseases in commercially important crops and cause major supply problems in the global food chain. Plants were able to protect themselves from disease before humans played an active role in protecting plants. They are known to synthesize a variety of secondary metabolites (SMs), such as terpenes, alkaloids, and phenolic compounds, which can be extracted using conventional and unconventional techniques to formulate biofungicides; plant extracts have antifungal activity and various mechanisms of action against these organisms. In addition, they are considered non-phytotoxic and potentially effective in disease control. They are a sustainable and economically viable alternative for use in agriculture, which is why biofungicides are increasingly recognized as an attractive option to solve the problems caused by synthetic fungicides. Currently, organic farming continues to grow, highlighting the importance of developing environmentally friendly alternatives for crop production. This review provides a compilation of the literature on biosynthesis, mechanisms of action of secondary metabolites against phytopathogens, extraction techniques and formulation of biofungicides, biological activity of plant extracts on phytopathogenic fungi, regulation, advantages, disadvantages and an overview of the current use of biofungicides in agriculture.
Collapse
Affiliation(s)
- Antonio de Jesús Cenobio-Galindo
- Instituto de Ciencias Agropecuarias, Universidad Autónoma del Estado de Hidalgo, Av. Universidad Km 1 Rancho Universitario, Tulancingo 43600, Hidalgo, Mexico; (A.d.J.C.-G.); (A.D.H.-F.); (U.G.-L.); (A.K.Z.-O.); (A.M.-N.)
| | - Alma Delia Hernández-Fuentes
- Instituto de Ciencias Agropecuarias, Universidad Autónoma del Estado de Hidalgo, Av. Universidad Km 1 Rancho Universitario, Tulancingo 43600, Hidalgo, Mexico; (A.d.J.C.-G.); (A.D.H.-F.); (U.G.-L.); (A.K.Z.-O.); (A.M.-N.)
| | - Uriel González-Lemus
- Instituto de Ciencias Agropecuarias, Universidad Autónoma del Estado de Hidalgo, Av. Universidad Km 1 Rancho Universitario, Tulancingo 43600, Hidalgo, Mexico; (A.d.J.C.-G.); (A.D.H.-F.); (U.G.-L.); (A.K.Z.-O.); (A.M.-N.)
| | - Ana Karen Zaldívar-Ortega
- Instituto de Ciencias Agropecuarias, Universidad Autónoma del Estado de Hidalgo, Av. Universidad Km 1 Rancho Universitario, Tulancingo 43600, Hidalgo, Mexico; (A.d.J.C.-G.); (A.D.H.-F.); (U.G.-L.); (A.K.Z.-O.); (A.M.-N.)
| | - Lucio González-Montiel
- Instituto de Tecnología de los Alimentos, Universidad de la Cañada, Teotitlán de Flores Magón 68540, Oaxaca, Mexico;
| | - Alfredo Madariaga-Navarrete
- Instituto de Ciencias Agropecuarias, Universidad Autónoma del Estado de Hidalgo, Av. Universidad Km 1 Rancho Universitario, Tulancingo 43600, Hidalgo, Mexico; (A.d.J.C.-G.); (A.D.H.-F.); (U.G.-L.); (A.K.Z.-O.); (A.M.-N.)
| | - Iridiam Hernández-Soto
- Instituto de Ciencias Agropecuarias, Universidad Autónoma del Estado de Hidalgo, Av. Universidad Km 1 Rancho Universitario, Tulancingo 43600, Hidalgo, Mexico; (A.d.J.C.-G.); (A.D.H.-F.); (U.G.-L.); (A.K.Z.-O.); (A.M.-N.)
| |
Collapse
|
5
|
Choi S, Lee SH, Hwang BS, Oh YT, Jeon J. Antifungal Activity-Guided Analysis of Actinostemma lobatum Extracts through Serial Sub-fractions. THE PLANT PATHOLOGY JOURNAL 2024; 40:218-224. [PMID: 38606450 PMCID: PMC11016561 DOI: 10.5423/ppj.nt.11.2023.0152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 01/30/2024] [Accepted: 03/06/2024] [Indexed: 04/13/2024]
Abstract
Plants are treasure trove of novel compounds that have potential for antifungal chemicals and drugs. In our previous study, we had screened plant extracts obtained from more than eight hundred plant materials collected in Korea, and found that butanol fraction of the Actinostemma lobatum were most potent in suppressing growth of diverse fungal pathogens of plants. Here in this study, we describe further analysis of the butanol fraction, and summarize the results of subsequent antifungal activity test for the sub-fractions against a selected set of plant pathogenic fungi. This line of analyses allowed us to identify the sub-fractions that could account for a significant proportion of observed antifungal activity of initial butanol fraction from A. lobatum. Further analysis of these sub-fractions and determination of structure would provide the shortlist for novel compounds that can be a lead to new agrochemicals.
Collapse
Affiliation(s)
- Seonwoo Choi
- Department of Biotechnology, College of Life and Applied Sciences, Yeungnam University, Gyeongsan 38541, Korea
| | - Song Hee Lee
- Plant Immunity Research Center, Seoul National University, Seoul 08826, Korea
| | - Byeong Su Hwang
- Animal and Plant Research Department, Nakdonggang National Institute of Biological Resources, Sangju 37242, Korea
| | - Young Taek Oh
- Animal and Plant Research Department, Nakdonggang National Institute of Biological Resources, Sangju 37242, Korea
| | - Junhyun Jeon
- Department of Biotechnology, College of Life and Applied Sciences, Yeungnam University, Gyeongsan 38541, Korea
- Plant Immunity Research Center, Seoul National University, Seoul 08826, Korea
| |
Collapse
|
6
|
Das S, Rabha J, Narzary D. Assessment of soil yeasts Papiliotrema laurentii S-08 and Saitozyma podzolica S-77 for plant growth promotion and biocontrol of Fusarium wilt of brinjal. J Appl Microbiol 2023; 134:lxad252. [PMID: 37930719 DOI: 10.1093/jambio/lxad252] [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: 09/11/2023] [Revised: 10/11/2023] [Accepted: 10/30/2023] [Indexed: 11/07/2023]
Abstract
AIM This study aimed to determine the efficacy of the soil yeasts Papiliotrema laurentii S-08 and Saitozyma podzolica S-77 for plant growth promotion (PGP) and biocontrol of wilt disease in brinjal plants while applying yeasts individually or as a consortium in pot experiments. METHODS AND RESULTS The yeasts were tested for various PGP characteristics and antagonistic activity against the phytopathogen Fusarium oxysporum f. sp. melongenae. Both the yeast isolates demonstrated some PGP attributes as well as inhibited the growth of the phytopathogen. A gas chromatography-mass spectrometry analysis of the yeast metabolites revealed the presence of several antifungal compounds. The pot experiment performed under nursery conditions showed that applying these yeasts, individually or in consortium, decreased the percent disease incidence in brinjal seedlings while significantly enhancing their growth parameters. CONCLUSION Papiliotrema laurentii S-08 and S. podzolica S-77 can be used in brinjal plants as plant growth promoters and also as biocontrol agents against the brinjal wilt disease.
Collapse
Affiliation(s)
- Sukanya Das
- Microbiology & Molecular Systematics Laboratory, Department of Botany, Gauhati University, Guwahati 781014, Assam, India
| | - Jintu Rabha
- Microbiology & Molecular Systematics Laboratory, Department of Botany, Gauhati University, Guwahati 781014, Assam, India
| | - Diganta Narzary
- Microbiology & Molecular Systematics Laboratory, Department of Botany, Gauhati University, Guwahati 781014, Assam, India
| |
Collapse
|
7
|
Fanele A, Ndlovu SI. Endophytic fungal species Nigrospora oryzae and Alternaria alternata exhibit antimicrobial activity against gram-positive and gram-negative multi-drug resistant clinical bacterial isolates. BMC Complement Med Ther 2023; 23:323. [PMID: 37715184 PMCID: PMC10504728 DOI: 10.1186/s12906-023-04157-8] [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: 10/26/2022] [Accepted: 09/07/2023] [Indexed: 09/17/2023] Open
Abstract
BACKGROUND The emergence of multidrug-resistant pathogens and the lack of new antimicrobial drugs is a major public health concern that needs urgent and innovative solutions. Endophytic fungi living in unique niches such as in endosymbiosis with plants are increasingly drawing attention as alternative sources of novel and chemically diverse compounds with unique mechanisms of action. METHODS In the present study, ten endophytic fungi isolated from the medicinal plant, Sclerocarya birrea were screened for bioactivity against a panel of indicator bacteria. Three bioactive endophytic fungi (strains P02PL2, P02MS1, and P02MS2A) were selected and identified through ITS-rDNA sequencing. The whole broth extracts of the three selected isolates were further screened against contemporary drug-resistant bacterial pathogens. This was followed by partial purification by solid phase extraction and GC-MS analysis of bioactive fractions. RESULTS The bioactive endophytic fungi were identified as Alternaria alternata species (strains P02PL2 and P02MS1) and Nigrospora oryzae (strain P02MS2A). The whole broth extracts from N. oryzae P02MS2A exhibited a MIC of one μg/mL and 16 μg/mL against gram-negative, MDR Pseudomonas 5625574 and gram-positive MRSA 25775 clinical isolates, respectively. After partial purification and GC-MS analysis of whole broth extract from A. alternaria PO2MS1, 2-fluorobenzoic acid heptadecyl was putatively identified as the active compound in fraction C of this extract. This compound was also putatively identified in fraction E of A. alternata P02PL2, fraction B of A. alternata P02MS1 and fraction B of N. oryzae P02MS2A, and interestingly, all these fractions retained activity against the two MDR clinical isolates. CONCLUSION The putative identification of 2-fluorobenzoic acid heptadecyl compound showing a broad-spectrum of activity, more especially against gram-negative MDR contemporary pathogens is highly encouraging in the initiative at developing novel drugs to combat multi-drug resistance.
Collapse
Affiliation(s)
- Asiphe Fanele
- Discipline of Medical Microbiology, School of Laboratory Medicine and Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Sizwe I Ndlovu
- Department of Biotechnology and Food Technology, Doornfontein Campus, University of Johannesburg, Johannesburg, South Africa.
| |
Collapse
|
8
|
Sánchez-Hernández E, Álvarez-Martínez J, González-García V, Casanova-Gascón J, Martín-Gil J, Martín-Ramos P. Helichrysum stoechas (L.) Moench Inflorescence Extract for Tomato Disease Management. Molecules 2023; 28:5861. [PMID: 37570830 PMCID: PMC10421166 DOI: 10.3390/molecules28155861] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/01/2023] [Accepted: 08/02/2023] [Indexed: 08/13/2023] Open
Abstract
Helichrysum stoechas is a singular halophyte that has been shown to have anti-inflammatory, antioxidant, and allelopathic properties. In the work presented herein, we have characterized its inflorescences hydromethanolic extract and assessed its antifungal activity for the pre- and postharvest management of tomato crop diseases. Gas chromatography-mass spectrometry characterization of the extract showed that 4-ethenyl-1,3-benzenediol, 2,3-dihydro-benzofuran, quinic acid, 3,5-dihydroxy-6,7,8-trimethoxy-2-phenyl-4H-1-benzopyran-4-one, 1,6-anhydro-β-D-glucopyranose, catechol, scopoletin, and maltol were the main constituents. The co-occurrence of pyranones, benzenediols, and quinic acids as phytoconstituents of H. stoechas extract resulted in promising in vitro minimum inhibitory concentrations of 500, 375, 500, 187.5, 187.5, and 375 μg·mL-1 against mycelia of Alternaria alternata, Colletotrichum coccodes, Fusarium oxysporum f. sp. lycopersici, Rhizoctonia solani, Sclerotinia sclerotiorum, and Verticillium dahliae, respectively. Further, to assess the potential of H. stoechas inflorescence extract for postharvest tomato crop protection, ex situ tests were conducted against C. coccodes, obtaining high protection at a dose of 750 μg·mL-1. Taking into consideration that the demonstrated activity is among the highest reported to date for plant extracts and comparable to that of the synthetic fungicides tested as positive controls, H. stoechas inflorescence extract may be put forward as a promising biorational and may deserve further testing in field-scale studies.
Collapse
Affiliation(s)
- Eva Sánchez-Hernández
- Department of Agricultural and Forestry Engineering, ETSIIAA, Universidad de Valladolid, Avenida de Madrid 44, 34004 Palencia, Spain; (E.S.-H.); (J.Á.-M.); (J.M.-G.)
| | - Javier Álvarez-Martínez
- Department of Agricultural and Forestry Engineering, ETSIIAA, Universidad de Valladolid, Avenida de Madrid 44, 34004 Palencia, Spain; (E.S.-H.); (J.Á.-M.); (J.M.-G.)
| | - Vicente González-García
- Department of Agricultural, Forest and Environmental Systems, Agrifood Research and Technology Centre of Aragón, Instituto Agroalimentario de Aragón—IA2 (CITA-Universidad de Zaragoza), Avda. Montañana 930, 50059 Zaragoza, Spain;
| | - José Casanova-Gascón
- Instituto Agroalimentario de Aragón—IA2 (CITA-Universidad de Zaragoza), EPS, Universidad de Zaragoza, Carretera de Cuarte s/n, 22071 Huesca, Spain;
| | - Jesús Martín-Gil
- Department of Agricultural and Forestry Engineering, ETSIIAA, Universidad de Valladolid, Avenida de Madrid 44, 34004 Palencia, Spain; (E.S.-H.); (J.Á.-M.); (J.M.-G.)
| | - Pablo Martín-Ramos
- Department of Agricultural and Forestry Engineering, ETSIIAA, Universidad de Valladolid, Avenida de Madrid 44, 34004 Palencia, Spain; (E.S.-H.); (J.Á.-M.); (J.M.-G.)
| |
Collapse
|
9
|
Pishgouii F, Lotfi S, Sedaghati E. Anti-AChE and Anti-BuChE Screening of the Fermentation Broth Extracts from Twelve Aspergillus Isolates and GC-MS and Molecular Docking Studies of the Most Active Extracts. Appl Biochem Biotechnol 2023; 195:5199-5216. [PMID: 37129742 DOI: 10.1007/s12010-023-04548-0] [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] [Accepted: 04/13/2023] [Indexed: 05/03/2023]
Abstract
Nowadays, the administration of cholinesterase enzyme (acetylcholinesterase: AChE and butyrylcholinesterase: BuChE) inhibitors is very common for the symptomatic treatment of Alzheimer's disease and the other forms of dementia and CNS disorders. In this paper, the anti-AChE and anti-BuChE activities of the fermentation broth ethyl acetate extracts from twelve Aspergillus isolates were evaluated by Ellman method. The results showed that A1 (Aspergillus flavus) and A5 (Aspergillus tubingensis, isolate 1) extracts with IC50 values of 46.77 μg/mL and 75.85 μg/mL possess the greatest ability to inhibit AChE and BuChE, respectively. GC-MS analysis of the extracts (A1 and A5) demonstrated that two alkaloids named 14-methyl-16-azabicyclo[10.3.1]hexadeca-1(15),12(16),13-triene (MAHT) and 6-chloro-2-methyl-7,8,9,10-tetrahydro-phenanthridine (CMTP) account for the highest percentage of A1 (26.95%) and A5 (25.5%) extracts, respectively. A 2-pyrazoline derivative, 5-hydroxy-3-(4-pyridinyl)-5-trifluoromethyl-1-(2,4,6-trimethylphenoxyacetyl)- (PHPTT), also constituted the high percentage (9.54%) of A5 extract. The anticholinesterase and neuroprotective effects of some 2-pyrazoline derivatives have been previously reported. The interaction study of MAHT with human AChE and CMTP and PHPTT with human BuChE using molecular docking indicated that these alkaloids bind to the active site gorge of the enzymes with high affinity. The best docking scores of MAHT, CMTP, and PHPTT were -7.1, -8.2, and -9.7 kcal/mol, respectively.
Collapse
Affiliation(s)
- Fatemeh Pishgouii
- Department of Biotechnology, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran
| | - Safa Lotfi
- Department of Biotechnology, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran.
| | - Ebrahim Sedaghati
- Department of Plant Protection, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran
| |
Collapse
|
10
|
Deresa EM, Diriba TF. Phytochemicals as alternative fungicides for controlling plant diseases: A comprehensive review of their efficacy, commercial representatives, advantages, challenges for adoption, and possible solutions. Heliyon 2023; 9:e13810. [PMID: 36879959 PMCID: PMC9984788 DOI: 10.1016/j.heliyon.2023.e13810] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 01/23/2023] [Accepted: 02/14/2023] [Indexed: 02/19/2023] Open
Abstract
Fungal infections are responsible for about 70-80% of the losses in agricultural production brought on by microbial diseases. Synthetic fungicides have been employed to manage plant diseases caused by phytopathogenic fungi but their use has been criticized due to unfavorable side effects. As alternative strategies, botanical fungicides have caught the interest of many researchers in recent years. There are numerous experimental studies on the fungicidal activities of phytochemicals against phytopathogenic fungi, but there is not a thorough review article that summarizes these experimental studies. The purpose of this review is therefore to consolidate data from in vitro and in vivo studies on the antifungal activity of phytochemicals reported by various researchers. This paper describes antifungal activities of plant extracts and compounds against phytopathogenic fungi, approved botanical fungicides, their benefits, obstacles and mitigation strategies. Relevant sources were collected using online data bases such as Google Scholar, PubMed and Science Direct, and comprehensively reviewed for preparation of this manuscript. This review revealed that phytochemicals are effective to manage plant diseases caused by phytopathogenic fungi. Botanical fungicides are endowed with benefits such as resistance inhibition, being ecofriendly, effective, selective, and more affordable compared to synthetic fungicides. However, there are only small number of approved botanical fungicides due to the many challenges that hinder their adoption and utilization for a wider scale production. Farmers' reluctance, lack of standardized formulation techniques, strict legislation, rapid degradation, and other factors hinder their adoption and utilization. The ways to address these challenges include increasing awareness among farmers, conducting more research to identify potential plants with fungicidal properties, standardizing extraction and formulation techniques, implementing the idea of plant breeding to increase bioactive agents, identifying favorable environments for site-specific plant species production, discovering synthetic analogues of the active ingredient to maintain quality standards, establishing reasonable regulation procedures and price points for a quicker market introduction. To put all these into practice, we recommend collaboration of regulatory agencies and researchers from a variety of fields.
Collapse
Affiliation(s)
- Ebisa Mirete Deresa
- Department of Chemistry, College of Natural Sciences, Jimma University, Jimma, Ethiopia
| | - Tamiru Fayisa Diriba
- Department of Chemistry, College of Natural Sciences, Jimma University, Jimma, Ethiopia
| |
Collapse
|
11
|
Zhao Y, Wang X, Zhang L, Wang K, Wu Y, Yao J, Cui B, Chen Z. Anti-Fungal Activity of Moutan cortex Extracts against Rice Sheath Blight ( Rhizoctonia solani) and Its Action on the Pathogen's Cell Membrane. ACS OMEGA 2022; 7:47048-47055. [PMID: 36570206 PMCID: PMC9773796 DOI: 10.1021/acsomega.2c06150] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 11/25/2022] [Indexed: 06/17/2023]
Abstract
Rice sheath blight (RSB) caused by Rhizoctonia solani is one of the most destructive diseases of rice (Oryza sativa). Although chemical fungicides are the most important control methods, their long-term unreasonable application has brought about problems such as environmental pollution, food risks, and non-target poisoning. Therefore, considering the extraction of fungistatic substances from plants may be an alternative in the future. In this study, we found that the Moutan cortex ethanol extract has excellent antifungal activity against R. solani, with a 100% inhibition rate at 1000 μg/mL, which aroused our great exploration interest. In-depth exploration found that the antifungal active ingredients of M. cortex were mainly concentrated in the petroleum ether extract of the M. cortex ethanol extract, which still maintained a 100% inhibition rate with 250 μg/mL, and its effective medium concentration (EC50) was 145.33 μg/mL against R. solani. Through the measurement of extracellular relative conductivity and OD260, the petroleum ether extract induced leakage of intracellular electrolytes and nucleic acids, indicating that the cell membrane was ruined. Therefore, we preliminarily determined that the cell membrane may be the target of the petroleum ether extract. Moreover, we found that petroleum ether extract reduced the content of ergosterol, a component of the cell membrane, which may be one of the reasons for the cell membrane destruction. Furthermore, the increase of MDA content would lead to membrane lipid peroxidation, further aggravating membrane damage, resulting in increased membrane permeability. Also, the destruction of the cell membrane was observed by the phenomenon of the mycelium being transparent and broken. In conclusion, this is the first report of the M. cortex petroleum ether extract exhibiting excellent antifungal activity against R. solani. The effect of the M. cortex petroleum ether extract on R. solani may be on the cell membrane, inducing the disorder of intracellular substances and metabolism, which may be one of the antifungal mechanisms against R. solani.
Collapse
Affiliation(s)
- Yongtian Zhao
- College
of Life Science and Agriculture, Qiannan
Normal University for Nationalities, Duyun, Guizhou558000, China
| | - Xinge Wang
- College
of Life Science and Agriculture, Qiannan
Normal University for Nationalities, Duyun, Guizhou558000, China
| | - Lian Zhang
- College
of Life Science and Agriculture, Qiannan
Normal University for Nationalities, Duyun, Guizhou558000, China
| | - Keying Wang
- College
of Life Science and Agriculture, Qiannan
Normal University for Nationalities, Duyun, Guizhou558000, China
| | - Yanchun Wu
- College
of Life Science and Agriculture, Qiannan
Normal University for Nationalities, Duyun, Guizhou558000, China
| | - Jia Yao
- College
of Life Science and Agriculture, Qiannan
Normal University for Nationalities, Duyun, Guizhou558000, China
| | - Baolu Cui
- College
of Life Science and Agriculture, Qiannan
Normal University for Nationalities, Duyun, Guizhou558000, China
| | - Zhuo Chen
- Key
Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry
of Education, Guizhou University, Guiyang, Guizhou550025, China
| |
Collapse
|
12
|
Lee SH, Oh YT, Lee DY, Cho E, Hwang BS, Jeon J. Large-Scale Screening of the Plant Extracts for Antifungal Activity against the Plant Pathogenic Fungi. THE PLANT PATHOLOGY JOURNAL 2022; 38:685-691. [PMID: 36503198 PMCID: PMC9742798 DOI: 10.5423/ppj.nt.07.2022.0098] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 09/27/2022] [Accepted: 10/09/2022] [Indexed: 06/17/2023]
Abstract
Plants produce chemicals of immense diversity that provide great opportunities for development of new antifungal compounds. In search for environment-friendly alternatives to the fungicide of current use, we screened plant extracts obtained from more than eight hundred plant materials collected in Korea for their antifungal activity against the model plant pathogenic fungus, Magnaporthe oryzae. This initial screening identified antifungal activities from the eleven plant extract samples, among which nine showed reproducibility in the follow-up screening. These nine samples were able to suppress not only M. oryzae but also other fungal pathogens. Interestingly, the plant extracts obtained from Actinostemma lobatum comprised five out of eight samples, and were the most effective in their antifungal activity. We found that butanol fraction of the A. lobatum extract is the most potent. Identification and characterization of antifungal substances in the A. lobatum extracts would provide the promising lead compounds for new fungicide.
Collapse
Affiliation(s)
- Song Hee Lee
- Plant Immunity Research Center, Seoul National University, Seoul 08826,
Korea
- Department of Biotechnology, College of Life and Applied Sciences, Yeungnam University, Gyeongsan 38541,
Korea
| | - Young Taek Oh
- Animal and Plant Research Department, Nakdonggang National Institute of Biological Resources, Sangju 37242,
Korea
| | - Do-Yeon Lee
- Department of Biotechnology, College of Life and Applied Sciences, Yeungnam University, Gyeongsan 38541,
Korea
| | - Eunbyeol Cho
- Department of Biotechnology, College of Life and Applied Sciences, Yeungnam University, Gyeongsan 38541,
Korea
| | - Byung Su Hwang
- Animal and Plant Research Department, Nakdonggang National Institute of Biological Resources, Sangju 37242,
Korea
| | - Junhyun Jeon
- Plant Immunity Research Center, Seoul National University, Seoul 08826,
Korea
- Department of Biotechnology, College of Life and Applied Sciences, Yeungnam University, Gyeongsan 38541,
Korea
| |
Collapse
|
13
|
Pestalotiopsis Diversity: Species, Dispositions, Secondary Metabolites, and Bioactivities. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27228088. [PMID: 36432188 PMCID: PMC9695833 DOI: 10.3390/molecules27228088] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 10/23/2022] [Accepted: 10/29/2022] [Indexed: 11/23/2022]
Abstract
Pestalotiopsis species have gained attention thanks to their structurally complex and biologically active secondary metabolites. In past decades, several new secondary metabolites were isolated and identified. Their bioactivities were tested, including anticancer, antifungal, antibacterial, and nematicidal activity. Since the previous review published in 2014, new secondary metabolites were isolated and identified from Pestalotiopsis species and unidentified strains. This review gathered published articles from 2014 to 2021 and focused on 239 new secondary metabolites and their bioactivities. To date, 384 Pestalotiopsis species have been discovered in diverse ecological habitats, with the majority of them unstudied. Some may contain secondary metabolites with unique bioactivities that might benefit pharmacology.
Collapse
|
14
|
Antiviral Activity of Ficus rubiginosa Leaf Extracts against HSV-1, HCoV-229E and PV-1. Viruses 2022; 14:v14102257. [PMID: 36298811 PMCID: PMC9607631 DOI: 10.3390/v14102257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 10/04/2022] [Accepted: 10/11/2022] [Indexed: 11/17/2022] Open
Abstract
Ficus rubiginosa plant extract showed antimicrobial activity, but no evidence concerning its antiviral properties was reported. The antiviral activity of the methanolic extract (MeOH) and its n-hexane (H) and ethyl acetate (EA) fractions against Herpes simplex virus-1 (HSV-1), Human coronavirus (HCoV) -229E, and Poliovirus-1 (PV-1) was investigated in the different phases of viral infection in the VERO CCL-81 cell line. To confirm the antiviral efficacy, a qPCR was conducted. The recorded cytotoxic concentration 50% was 513.1, 298.6, and 56.45 µg/mL for MeOH, H, and EA, respectively, assessed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay after 72 h of treatment. The Ficus rubiginosa leaf extract inhibited the replication of HSV-1 in the early stages of infection, showing a complete inhibition up to 0.62, 0.31, and 1.25 µg/mL. Against HCoV-229E, a total inhibition up to 1.25 µg/mL for MeOH and H as well as 5 µg/mL for EA was observed. Otherwise, no activity was recorded against PV-1. The leaf extract could act directly on the viral envelope, destructuring the lipid membrane and/or directly blocking the enriched proteins on the viral surface. The verified gene inhibition suggested that the treatments with M, H, and EA impaired HSV-1 and HCoV-229E replication, with a greater antiviral efficiency against HSV-1 compared to HCoV-229E, possibly due to a greater affinity of Ficus rubiginosa towards membrane glycoproteins and/or the different lipid envelopes.
Collapse
|
15
|
Aguilar-Rodríguez S, López-Villafranco ME, Jácquez-Ríos MP, Hernández-Delgado CT, Mata-Pimentel MF, Estrella-Parra EA, Espinosa-González AM, Nolasco-Ontiveros E, Avila-Acevedo JG, García-Bores AM. Chemical profile, antimicrobial activity, and leaf anatomy of Adenophyllum porophyllum var. cancellatum. Front Pharmacol 2022; 13:981959. [DOI: 10.3389/fphar.2022.981959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 09/20/2022] [Indexed: 11/13/2022] Open
Abstract
Adenophyllum porophyllum var. cancellatum, known as “árnica del monte” in Mexico, is an aromatic annual plant belonging to the Asteraceae family that grows from southern Arizona to central Mexico. The aerial parts of the plant are used in traditional medicine to treat skin diseases such as irritations, infections, and wounds. In this study, the essential oil of this plant was characterized, and its antimicrobial activity was evaluated. This species has large glands in its leaves; therefore, for quality control purposes, an anatomical study of the leaves was performed. The essential oil was isolated from the aerial parts of the plant through hydro-distillation and analyzed using a gas chromatography/mass spectrometry (GC/MS) system. Its anti-yeast activity was evaluated against three Candida species and ten bacterial strains using the disk diffusion technique. The minimum inhibitory concentration (MIC), minimum fungicidal concentration (MFC), and minimum bactericidal concentration (MBC) were determined using broth microdilution. Anatomical study was performed on the middle part of the leaf. A yield of 0.5% of the essential oil was obtained from the herb, and Eighteen compounds in the essential oil were identified, within them trans pinocamphone (29.5%), limonene (24.7%), pinocarvone (21.8%), and cis pinocamphone (8.0%) were the main components. The inhibition zones were between 10 mm and 20 mm, and the MIC and MFC against the three Candida species ranged from 60 to 500 μg/ml. The leaf anatomy showed anisocytic stomata, simple and glandular trichomes of different types, and large and elliptical-shaped lysigenous glands, which can be used for taxonomic identification. The A. porophyllum var. cancellatum essential oil can serve as an alternative source of natural antimicrobial agents as an affordable approach to control infectious diseases. This is the first study that reports the chemical composition and antimicrobial activity of the essential oil, as well as the leaf anatomy of this species.
Collapse
|
16
|
Sun Y, Jiang P, Yang H, Zhang Z, Zhou Y, Li P, Zeng Q, Zhang X. Network Pharmacology-Based Analysis of the Potential Biological Mechanisms of Coix Seed against Colorectal Cancer. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2022; 2022:9261768. [PMID: 36248436 PMCID: PMC9560812 DOI: 10.1155/2022/9261768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 09/23/2022] [Indexed: 11/17/2022]
Abstract
Objective The aim of this study was to explore the potential biological mechanisms of coix seed in the treatment of colorectal cancer (CRC) based on network pharmacology analysis. Methods The active components of coix seed and their potential action targets were retrieved from Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform(TCMSP). The disease targets related to CRC were obtained from the DisGeNET database. The intersection targets of the drug targets and disease targets were selected, and a component-target-disease network was built using Cytoscape 3.8.0 tool. A global network of the core target protein interactions was constructed using String database. Biological function analysis and pathway enrichment analysis of core targets were conducted to explore the potential. Results A total of nine active components were obtained from the TCMSP database corresponding to 37 targets. Further analysis showed that 18 overlapping targets were associated with CRC. Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis was conducted based on the 18 targets and 11 significantly enriched signaling pathways implicated in CRC were identified. Conclusion The multicomponent and multitarget characteristics of coix seed are preliminarily verified, and the potential biological mechanisms of coix seed in the treatment of CRC are predicted, which provides a theoretical basis for the experimental research.
Collapse
Affiliation(s)
- Yi Sun
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Peishi Jiang
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Hongjie Yang
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Zhichun Zhang
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Yuanda Zhou
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Peng Li
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Qingsheng Zeng
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Xipeng Zhang
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| |
Collapse
|
17
|
Liu J, Clarke JA, McCann S, Hillier NK, Tahlan K. Analysis of Streptomyces Volatilomes Using Global Molecular Networking Reveals the Presence of Metabolites with Diverse Biological Activities. Microbiol Spectr 2022; 10:e0055222. [PMID: 35900081 PMCID: PMC9431705 DOI: 10.1128/spectrum.00552-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 07/09/2022] [Indexed: 12/20/2022] Open
Abstract
Streptomyces species produce a wide variety of specialized metabolites, some of which are used for communication or competition for resources in their natural environments. In addition, many natural products used in medicine and industry are derived from Streptomyces, and there has been interest in their capacity to produce volatile organic compounds (VOCs) for different industrial and agricultural applications. Recently, a machine-learning workflow called MSHub/GNPS was developed, which enables auto-deconvolution of gas chromatography-mass spectrometry (GC-MS) data, molecular networking, and library search capabilities, but it has not been applied to Streptomyces volatilomes. In this study, 131 Streptomyces isolates from the island of Newfoundland were phylogenetically typed, and 37 were selected based on their phylogeny and growth characteristics for VOC analysis using both a user-guided (conventional) and an MSHub/GNPS-based approach. More VOCs were annotated by MSHub/GNPS than by the conventional method. The number of unknown VOCs detected by the two methods was higher than those annotated, suggesting that many novel compounds remain to be identified. The molecular network generated by GNPS can be used to guide the annotation of such unknown VOCs in future studies. However, the number of overlapping VOCs annotated by the two methods is relatively small, suggesting that a combination of analysis methods might be required for robust volatilome analysis. More than half of the VOCs annotated with high confidence by the two approaches are plant-associated, many with reported bioactivities such as insect behavior modulation. Details regarding the properties and reported functions of such VOCs are described. IMPORTANCE This study represents the first detailed analysis of Streptomyces volatilomes using MSHub/GNPS, which in combination with a routinely used conventional method led to many annotations. More VOCs could be annotated using MSHub/GNPS as compared to the conventional method, many of which have known antimicrobial, anticancer, and insect behavior-modulating activities. The identification of numerous plant-associated VOCs by both approaches in the current study suggests that their production could be a more widespread phenomenon by members of the genus, highlighting opportunities for their large-scale production using Streptomyces. Plant-associated VOCs with antimicrobial activities, such as 1-octen-3-ol, octanol, and phenylethyl alcohol, have potential applications as fumigants. Furthermore, many of the annotated VOCs are reported to influence insect behavior, alluding to a possible explanation for their production based on the functions of other recently described Streptomyces VOCs in dispersal and nutrient acquisition.
Collapse
Affiliation(s)
- Jingyu Liu
- Department of Biology, Memorial University of Newfoundland, St. John’s, Newfoundland and Labrador, Canada
| | - Jody-Ann Clarke
- Department of Biology, Memorial University of Newfoundland, St. John’s, Newfoundland and Labrador, Canada
| | - Sean McCann
- Department of Biology, Acadia University, Wolfville, Nova Scotia, Canada
| | - N. Kirk Hillier
- Department of Biology, Acadia University, Wolfville, Nova Scotia, Canada
| | - Kapil Tahlan
- Department of Biology, Memorial University of Newfoundland, St. John’s, Newfoundland and Labrador, Canada
| |
Collapse
|
18
|
Mostafa YS, Alamri SA, Alrumman SA, Hashem M, Baka ZA. Green Synthesis of Silver Nanoparticles Using Pomegranate and Orange Peel Extracts and Their Antifungal Activity against Alternaria solani, the Causal Agent of Early Blight Disease of Tomato. PLANTS (BASEL, SWITZERLAND) 2021; 10:plants10112363. [PMID: 34834726 PMCID: PMC8619153 DOI: 10.3390/plants10112363] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 10/20/2021] [Accepted: 10/29/2021] [Indexed: 06/13/2023]
Abstract
This study aimed to synthesize silver nanoparticles (AgNPs) by pomegranate and orange peel extracts using a low concentration of AgNO3 solution to controlearly blight of tomato caused by Alternaria solani. The pathogen was isolated from infected tomato plants growing in different areas of Saudi Arabia. The isolates of this pathogen were morphologically and molecularly identified. Extracts from peels of pomegranate and orange fruits effectively developed a simple, quick, eco-friendly and economical method through a synthesis of AgNPs as antifungal agents against A. solani. Phenolic content in the pomegranate peel extract was greater than orange peel extract. Phenolic compounds showed a variation of both peel extracts as identified and quantified by High-Performance Liquid Chromatography. The phenolic composition displayed variability as the pomegranate peel extract exhibited an exorbitant amount of Quercitrin (23.62 mg/g DW), while orange peel extract recorded a high amount of Chlorogenic acid (5.92 mg/g DW). Biosynthesized AgNPs were characterized using UV- visible spectroscopy which recorded an average wavelength of 437 nm and 450 nm for pomegranate and orange peels, respectively. Fourier-transform infrared spectroscopy exhibited 32x73.24, 2223.71, 2047.29 and 1972.46 cm-1, and 3260.70, 1634.62, 1376.62 and 1243.76 cm-1 for pomegranate and orange peels, respectively. Transmission electron microscopy showed spherical shape of nanoparticles. Zetasizer analysis presented negative charge values; -16.9 and -19.5 mV with average particle sizes 8 and 14 nm fin case of pomegranate and orange peels, respectively. In vitro, antifungal assay was done to estimate the possibility of biosynthesized AgNPs and crude extracts of fruit peels to reduce the mycelial growth of A. solani. AgNPs displayed more fungal mycelial inhibition than crude extracts of two peels and AgNO3. We recommend the use of AgNPs synthesized from fruit peels for controlling fungal plant pathogens and may be applied broadly and safely in place by using the chemical fungicides, which display high toxicity for humans.
Collapse
Affiliation(s)
- Yasser S. Mostafa
- Department of Biology, College of Science, King Khalid University, Abha P.O. Box 9004, Saudi Arabia; (Y.S.M.); (S.A.A.); (S.A.A.); (M.H.)
| | - Saad A. Alamri
- Department of Biology, College of Science, King Khalid University, Abha P.O. Box 9004, Saudi Arabia; (Y.S.M.); (S.A.A.); (S.A.A.); (M.H.)
| | - Sulaiman A. Alrumman
- Department of Biology, College of Science, King Khalid University, Abha P.O. Box 9004, Saudi Arabia; (Y.S.M.); (S.A.A.); (S.A.A.); (M.H.)
| | - Mohamed Hashem
- Department of Biology, College of Science, King Khalid University, Abha P.O. Box 9004, Saudi Arabia; (Y.S.M.); (S.A.A.); (S.A.A.); (M.H.)
- Department of Botany and Microbiology, Faculty of Science, Assiut University, Assiut P.O. Box 71515, Egypt
| | - Zakaria A. Baka
- Department of Botany and Microbiology, Faculty of Science, Damietta University, New Damietta P.O. Box 34517, Egypt
| |
Collapse
|