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Li F, Wang C, Xu J, Wang X, Cao M, Wang S, Zhang T, Xu Y, Wang J, Pan S, Hu W. Evaluation of the antibacterial activity of Elsholtzia ciliate essential oil against halitosis-related Fusobacterium nucleatum and Porphyromonas gingivalis. Front Microbiol 2023; 14:1219004. [PMID: 37608950 PMCID: PMC10440386 DOI: 10.3389/fmicb.2023.1219004] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 07/24/2023] [Indexed: 08/24/2023] Open
Abstract
The broad-spectrum antimicrobial activity of Elsholtzia ciliate essential oil (ECO) has been previously reported, but its effectiveness against halitosis-causing bacteria such as Fusobacterium nucleatum and Porphyromonas gingivalis is not well understood. In this study, we investigated the bacteriostatic activity of ECO against planktonic cells and biofilms of F. nucleatum and P. gingivalis, as well as its ability to inhibit bacterial metabolism and production of volatile sulfur compounds (VSCs) at sub-lethal concentrations. Our findings revealed that ECO exhibited comparable activities to chlorhexidine against these oral bacteria. Treatment with ECO significantly reduced the production of VSCs, including hydrogen sulfide, dimethyl disulfide, and methanethiol, which are major contributors to bad breath. As the major chemical components of ECO, carvacrol, p-cymene, and phellandrene, were demonstrated in vitro inhibitory effects on F. nucleatum and P. gingivalis, and their combined use showed synergistic and additive effects, suggesting that the overall activity of ECO is derived from the cumulative or synergistic effect of multiple active components. ECO was found to have a destructive effect on the bacterial cell membrane by examining the cell morphology and permeability. Furthermore, the application of ECO induced significant changes in the bacterial composition of saliva-derived biofilm, resulting in the elimination of bacterial species that contribute to halitosis, including Fusobacterium, Porphyromonas, and Prevotella. These results provide experimental evidence for the potential clinical applications of ECOs in the prevention and treatment of halitosis.
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Affiliation(s)
- Fengjiao Li
- College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Chuandong Wang
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, Qingdao, China
| | - Jing Xu
- Shenzhen RELX Technology Co., Ltd., Shenzhen, China
| | - Xiaoyu Wang
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, Qingdao, China
| | - Meng Cao
- Shandong Aobo Biotechnology Co., Ltd., Liaocheng, China
| | - Shuhua Wang
- Shandong Aobo Biotechnology Co., Ltd., Liaocheng, China
| | | | - Yanyong Xu
- Beijing Xinyue Technology Co., Ltd., Beijing, China
| | - Jing Wang
- College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Shaobin Pan
- College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Wei Hu
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, Qingdao, China
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Han S, He K, An J, Qiao M, Ke R, Wang X, Xu Y, Tang X. Detection of Specific Volatile Organic Compounds in Tribolium castaneum (Herbst) by Solid-Phase Microextraction and Gas Chromatography-Mass Spectrometry. Foods 2023; 12:2484. [PMID: 37444222 DOI: 10.3390/foods12132484] [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: 05/24/2023] [Revised: 06/19/2023] [Accepted: 06/21/2023] [Indexed: 07/15/2023] Open
Abstract
The red flour beetle, Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae), is a major storage pest that could lead to a wide range of damage. Its secretions have a significant impact on the quality of stored grain and food, leading to serious food safety problems such as grain spoilage and food carcinogenesis. This study investigates new detection techniques for grain storage pests to improve grain insect detection in China. The primary volatile organic chemicals (VOCs) in these secretions are identified using headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography-mass spectrometry (GC-MS). The specific VOCs that are unique to T. castaneum are selected as criteria for determining the presence of T. castaneum in the granary. To obtain more specific VOCs, experiments were designed for the analysis of T. castaneum samples under different extraction times, two types of SPME fibers and two GC-MS devices of different manufacturers. The experimental results showed that 12 VOCs were detected at relatively high levels, seven of which were common and which were not detected in other grains and grain insects. The seven compounds are 1-pentadecene, 2-methyl-p-benzoquinone, 2-ethyl-p-benzoquinone, 1-hexadecene, cis-9-tetradecen-1-ol, m-cresol and paeonol. These seven compounds can be used as volatile markers to identify the presence of T. castaneum, which could serve as a research foundation for the creation of new techniques for T. castaneum monitoring.
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Affiliation(s)
- Shaoyun Han
- College of Engineering, China Agricultural University, Beijing 100083, China
| | - Ke He
- College of Engineering, China Agricultural University, Beijing 100083, China
| | - Jing An
- College of Engineering, China Agricultural University, Beijing 100083, China
| | - Mengmeng Qiao
- College of Engineering, China Agricultural University, Beijing 100083, China
| | - Runhui Ke
- Sinolight Inspection& Certification Co., Ltd., Beijing 100083, China
| | - Xiao Wang
- Sinolight Inspection& Certification Co., Ltd., Beijing 100083, China
| | - Yang Xu
- College of Engineering, China Agricultural University, Beijing 100083, China
| | - Xiuying Tang
- College of Engineering, China Agricultural University, Beijing 100083, China
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Yu X, Song YR, Zhao ZN. The complete chloroplast genome of Elsholtzia fruticosa (D. Don) Rehd. (Labiatae), an ornamental plant with high medicinal value. Mitochondrial DNA B Resour 2023; 8:336-341. [PMID: 36876144 PMCID: PMC9980026 DOI: 10.1080/23802359.2023.2183069] [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] [Indexed: 03/05/2023] Open
Abstract
Elsholtzia fruticosa is an ornamental plant with high medicinal value. In this study, we sequenced and analyzed the complete chloroplast (cp) genome of the species. The complete cp sequence is 151,550 bp, including the large single-copy (LSC) region of 82,778 bp, the small single-copy (SSC) region of 17,492 bp, and a pair of invert repeats (IRs) regions of 25,640 bp. It encodes 132 unique genes in total, including 87 protein-coding genes, 37 transfer RNA genes (tRNAs), and eight ribosomal RNA genes (rRNAs). The comparative analysis of complete cp genomes showed that the genomic structure and gene order of E. fruticosa cps were conserved. The sequences of rps15, rps19, ycf1, ycf3, ycf15, psbL, psaI, trnG-UCC, trnS-GCU, trnR-UCU, trnL-UAG, trnP-UG, and trnL-UAA serve as hotspots for developing the DNA barcoding of Elsholtzia species. There are 49 SSR loci in the cp genome of E. fruticosa, among which the repeat numbers of mononucleotide, dinucleotide, trinucleotide, tetranucleotide, and pentanucleotides SSR are 37, 9, 3, 0, and 0, respectively. A total of 50 repeats were detected, including 15 forward repeats, seven reverse repeats, 26 palindromic repeats, and two complementary repeats. Phylogenetic analysis based on the complete cp genome and protein-coding DNA sequences of 26 plants indicates that E. fruticosa has a dose relationship with E. splendens and E. byeonsanensis.
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Affiliation(s)
- Xiao Yu
- School of Landscape Architecture and Horticulture Sciences, Southwest Forestry University, Kunming, China
| | - Yu-Ru Song
- School of Forestry, Southwest Forestry University, Kunming, China
| | - Zhen-Ning Zhao
- School of Forestry, Southwest Forestry University, Kunming, China
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Sang YL, Dai L, Wang P, Chen LJ, Jiao ML, Liu JY, Zhang NZ, Fan GW, Hao YJ, Wang XL. Investigation of insecticidal activity of two Rhododendron species on stored-product insects. JOURNAL OF PLANT DISEASES AND PROTECTION : SCIENTIFIC JOURNAL OF THE GERMAN PHYTOMEDICAL SOCIETY (DPG) 2023; 130:371-382. [PMID: 35965943 PMCID: PMC9361267 DOI: 10.1007/s41348-022-00654-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 07/20/2022] [Indexed: 05/03/2023]
Abstract
This study was designed to investigate the insecticidal activity of the essential oils (EOs) and extracts from Rhododendron rufum and Rhododendron przewalskii. The EOs were extracted from the leaves of R. Rufum and R. przewalskii by hydro-distillation and their chemical components were analyzed by gas chromatography-mass spectrometry (GC-MS). The repellency, contact toxicity and antifeedant activity of the EOs and extracts were evaluated against Sitophilus oryzae and Tribolium castaneum along with those of their main components. A total of nine compounds were identified from the EO of R. Rufum, and the most abundant component was myristicin (79.72%). The EO of R. Rufum exhibited repellent activities at different levels and its main compound myristicin showed contact toxicity and repellent effects against S. oryzae and T. castaneum. Meanwhile, by bioassay-guided fractionation, four compounds with strong antifeedant activities against T. castaneum, 24-methylenecycloartanyl-2'E, 4'Z-tetradecadienoate (1), methyl thyrsiflorin B acetate (2), friedelin (3) and Excoecarin R1 methyl ester (4) were separated and identified from the ethanol extract of R. przewalskii for the first time. Considering the significant anti-insect activities, the EOs and extracts of R. Rufum and R. przewalskii might be used in integrated pest strategies, establishing a good perspective for the comprehensive use of natural plant resources of Rhododendron genus.
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Affiliation(s)
- Yu-Li Sang
- College of Pharmacy, Liaoning University, No.66 Middle Chongshan Road, Shenyang, 110036 Liaoning China
| | - Lu Dai
- College of Pharmacy, Liaoning University, No.66 Middle Chongshan Road, Shenyang, 110036 Liaoning China
| | - Pei Wang
- College of Pharmacy, Liaoning University, No.66 Middle Chongshan Road, Shenyang, 110036 Liaoning China
| | - Li-Jiang Chen
- College of Pharmacy, Liaoning University, No.66 Middle Chongshan Road, Shenyang, 110036 Liaoning China
| | - Mei-Ling Jiao
- College of Pharmacy, Liaoning University, No.66 Middle Chongshan Road, Shenyang, 110036 Liaoning China
| | - Jing-Yu Liu
- College of Pharmacy, Liaoning University, No.66 Middle Chongshan Road, Shenyang, 110036 Liaoning China
| | - Nai-Zhi Zhang
- College of Pharmacy, Liaoning University, No.66 Middle Chongshan Road, Shenyang, 110036 Liaoning China
| | - Guang-Wen Fan
- College of Pharmacy, Liaoning University, No.66 Middle Chongshan Road, Shenyang, 110036 Liaoning China
| | - Yan-Jun Hao
- Liaoning Academy of Traditional Chinese Medicine, Liaoning University of Traditional Chinese Medicine, No.79 East Chongshan Road, Shenyang, 110032 Liaoning China
| | - Xiu-Lan Wang
- Inner Mongolia Institute of Mongolian Medicine Engineering Technology, Inner Mongolia University for Nationalities, No.536 West Huolinhe Street, Tongliao, 028000 China
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Sang Y, Wang P, Liu J, Hao Y, Wang X. Chemical Composition of Essential Oils from Three Rhododendron Species and Their Repellent, Insecticidal and Fumigant Activities. Chem Biodivers 2022; 19:e202200740. [PMID: 36310430 DOI: 10.1002/cbdv.202200740] [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: 08/02/2022] [Accepted: 10/28/2022] [Indexed: 12/27/2022]
Abstract
In order to assess the repellent, contact, and fumigant properties of three essential oils (EOs) from Rhododendron species in China against adults of Tribolium castaneum, Lasioderma serricorne, Sitophilus oryzae, this study analyzed their chemical components. The three EOs were extracted by hydrodistillation from leaves of Rhododendron species, including R. davidsonianum, R. heliolepis and R. strigillosum. Sesquiterpenoids and monoterpenes were the main components of the three EOs that were detected by GC/MS and GC-FID. α-Pinene, β-Caryophyllene, α-Humulene, Kaura-16-ene and Sandaracopimaradiene was among the comparatively high components. In this study, the EOs of three Rhododendron species demonstrated repellent activities against T. castaneum and L. serricorne in 2 h and 4 h exposure, but the repellent activity to S. oryzae was not obvious. The three EOs from R. davidsonianum, R. heliolepis and R. strigillosum also had contact activities and fumigant activities against the Tribolium castaneum (LC50 =13.453 mg/L air, 4.728 mg/L air, 4.529 mg/L air and LD50 =15.027 μg/adult, 15.017 μg/adult, 10.994 μg/adult, respectively), Lasioderma serricorne (LC50 =8.584 mg/L air, 6.044 mg/L air, 6.355 mg/L air and LD50 =4.566 μg/adult, 7.067 μg/adult, 3.652 μg/adult, respectively) and Sitophilus oryzae (LC50 =3.304 mg/L air, 6.795 mg/L air, 7.130 mg/L air and LD50 =10.200 μg/adult, 15.021 μg/adult, 9.178 μg/adult, respectively) adults. The above results not only opened a potential prospect for applications of Rhododendrons in the prevention and control of insects in stored products, but also provide a basis for the comprehensive utilization of the rich natural Rhododendron plant resources.
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Affiliation(s)
- YuLi Sang
- College of Pharmacy, Liaoning University, No. 66 Middle Chongshan Road, Shenyang, 110036, Liaoning, China
| | - Pei Wang
- College of Pharmacy, Liaoning University, No. 66 Middle Chongshan Road, Shenyang, 110036, Liaoning, China
| | - JingYu Liu
- College of Pharmacy, Liaoning University, No. 66 Middle Chongshan Road, Shenyang, 110036, Liaoning, China
| | - YanJun Hao
- Liaoning Academy of Traditional Chinese Medicine, Liaoning University of Traditional Chinese Medicine, No. 79 East Chongshan Road, Shenyang, 110032, Liaoning, China
| | - XiuLan Wang
- Inner Mongolia Institute of Mongolian Medicine Engineering Technology, Inner Mongolia University for Nationalities, No. 536 West Huolinhe Street, Tongliao, 028000, China
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Ebadollahi A, Jalali Sendi J, Setzer WN, Changbunjong T. Encapsulation of Eucalyptus largiflorens Essential Oil by Mesoporous Silicates for Effective Control of the Cowpea Weevil, Callosobruchus maculatus (Fabricius) (Coleoptera: Chrysomelidae). MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27113531. [PMID: 35684469 PMCID: PMC9182336 DOI: 10.3390/molecules27113531] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 05/24/2022] [Accepted: 05/28/2022] [Indexed: 11/16/2022]
Abstract
Although the use of synthetic chemicals is the principal method for insect pest management, their widespread application has led to numerous side effects, including environmental pollution and threats to human and animal health. Plant essential oils have been introduced as promising natural substitutes for synthetic insecticides. However, high volatility and/or low durability are the main limiting factors for essential oil application for control of insect pests. Accordingly, along with an evaluation of the fumigant toxicity of Eucalyptus largiflorens essential oil against the cowpea weevil, Callosobruchus maculatus, essential oil was nanoencapsulated by two mesoporous silicates, MCM-41 and zeolite 3A, to enhance fumigant persistence and toxicity. The chemical profile of essential oil was also analyzed through gas chromatographic-mass spectrometry. E. largiflorens essential oil showed significant concentration-dependent toxicity against insect pests; a concentration of 5.16 μL/L resulted in 100% mortality after 48 h. The toxicity of essential oil could be attributed to the presence of various insecticidal terpenes, such as spathulenol (15.6%), cryptone (7.0%), and 1,8-cineole (5.8%). Fumigant persistence was increased from 6 days to 19 and 17 days for pure and capsulated essential oil with MCM-41 and Zeolite 3A, respectively. The insect mortality also increased from 99 insects in pure essential oil to 178 and 180 insects in MCM-41 and Zeolite 3A encapsulated formulations, respectively. Therefore, the encapsulation of E. largiflorens essential oil by MCM- 41 and Zeolite 3A is a beneficial method for enhancing its persistence and toxicity against C. maculatus.
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Affiliation(s)
- Asgar Ebadollahi
- Department of Plant Sciences, Moghan College of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil 5697194781, Iran
- Correspondence: (A.E.); (T.C.)
| | - Jalal Jalali Sendi
- Department of Plant Protection, Faculty of Agricultural Sciences, University of Guilan, Rasht 416351314, Iran;
| | - William N. Setzer
- Department of Chemistry, University of Alabama in Huntsville, Huntsville, AL 35899, USA;
- Aromatic Plant Research Center, 230 N 1200 E, Suite 100, Lehi, UT 84043, USA
| | - Tanasak Changbunjong
- Department of Pre-Clinic and Applied Animal Science, Faculty of Veterinary Science, Mahidol University, Nakhon Pathom 73170, Thailand
- Correspondence: (A.E.); (T.C.)
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Ren Y, Wang T, Jiang Y, Chen D, Zuo W, Guo J, Jin D. Behavioral Response, Fumigation Activity, and Contact Activity of Plant Essential Oils Against Tobacco Beetle (Lasioderma serricorne (F.)) Adults. Front Chem 2022; 10:880608. [PMID: 35402369 PMCID: PMC8988062 DOI: 10.3389/fchem.2022.880608] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 03/03/2022] [Indexed: 11/13/2022] Open
Abstract
Tobacco beetle (Lasioderma serricorne (F.)) is one of the main storage pests that harm tobacco leaves. The current control methods mainly include physical control, chemical control, and biological control, but they all have their own disadvantages. In this study, 22 kinds of plant essential oils in grapefruit, peppermint, juniper, eucalyptus, myrrh, lemon grass, geranium, tea tree, cypress, citronella, patchouli, benzoin, rosemary, cinnamon, clary sage, bergamot, mastic, ginger, rose hydrosol, cedar, thyme, and basil, respectively, are selected to explore their behavioral responses against L. serricorne adults using a glass Y-tube olfactometer. The behavioral responses results show that 17 kinds of essential oils in eucalyptus, basil, grapefruit, cypress, mastic, peppermint, patchouli, juniper, geranium, thyme, benzoin, lemon grass, cinnamon, ginger, rosemary, clary sage, and citronella can avoid L. serricorne adults, while five kinds of essential oils in tea tree, rose hydrosol, myrrh, bergamot, and cedar can attract L. serricorne adults. Especially, essential oils in eucalyptus and grapefruit can avoid L. serricorne adults at 1 μl/L with the repellent rates of 94.67 and 94.56%, respectively. Meanwhile, 17 kinds of essential oils which can avoid L. serricorne adults are selected to determine their fumigation activity against L. serricorne adults using the Erlenmeyer flask test method, and bioassay results show that after 72 h of treatment, five kinds of plant essential oils in rosemary, eucalyptus, basil, citronella, and geranium show excellent fumigation activity against L. serricorne adults with the mortality rates of 100.00, 95.29, 95.29, 94.12, and 91.76%, respectively, and their LD50 of the contact activity against L. serricorne adults determined using the leaf-dipping method are 3.60, 3.49, 8.90, 6.70, and 7.80 μl/L, respectively. Our results show that plant essential oils could be developed as environmentally friendly insect control agents.
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Affiliation(s)
- Yanling Ren
- Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, Institute of Entomology, Scientific Observing and Experimental Station of Crop Pest in Guiyang, Ministry of Agriculture, Guizhou University, Guiyang, China
- Guizhou Light Industry Technical College, Guiyang, China
| | - Tao Wang
- Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, Institute of Entomology, Scientific Observing and Experimental Station of Crop Pest in Guiyang, Ministry of Agriculture, Guizhou University, Guiyang, China
- Guizhou Light Industry Technical College, Guiyang, China
- *Correspondence: Tao Wang, ; Daochao Jin,
| | - Yingjie Jiang
- Guizhou Light Industry Technical College, Guiyang, China
| | - Ding Chen
- China Tobacco Guizhou Import and Export Co., Ltd., Guiyang, China
| | - Wenyu Zuo
- Guizhou Tobacco Redrying Co., Ltd., Guiyang Redrying Factory, Guiyang, China
| | - Jianjun Guo
- Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, Institute of Entomology, Scientific Observing and Experimental Station of Crop Pest in Guiyang, Ministry of Agriculture, Guizhou University, Guiyang, China
| | - Daochao Jin
- Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, Institute of Entomology, Scientific Observing and Experimental Station of Crop Pest in Guiyang, Ministry of Agriculture, Guizhou University, Guiyang, China
- *Correspondence: Tao Wang, ; Daochao Jin,
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