scholarly journals Identification and Characterization of Nnematicidal Volatile Organic Compounds from Deep-Sea Virgibacillus dokdonensis MCCC 1A00493

Molecules ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 744 ◽  
Author(s):  
Dian Huang ◽  
Chen Yu ◽  
Zongze Shao ◽  
Minmin Cai ◽  
Guangyu Li ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Deep Sea ◽  
Direct Contact ◽  
Dimethyl Disulfide ◽  
Economic Losses ◽  
Root Knot Nematodes ◽  
Fumigant Activity ◽  
Volatile Organic ◽  
Contact Killing

Root-knot nematode diseases cause severe yield and economic losses each year in global agricultural production. Virgibacillus dokdonensis MCCC 1A00493, a deep-sea bacterium, shows a significant nematicidal activity against Meloidogyne incognita in vitro. However, information about the active substances of V. dokdonensis MCCC 1A00493 is limited. In this study, volatile organic compounds (VOCs) from V. dokdonensis MCCC 1A00493 were isolated and analyzed through solid-phase microextraction and gas chromatography–mass spectrometry. Four VOCs, namely, acetaldehyde, dimethyl disulfide, ethylbenzene, and 2-butanone, were identified, and their nematicidal activities were evaluated. The four VOCs had a variety of active modes on M. incognita juveniles. Acetaldehyde had direct contact killing, fumigation, and attraction activities; dimethyl disulfide had direct contact killing and attraction activities; ethylbenzene had an attraction activity; and 2-butanone had a repellent activity. Only acetaldehyde had a fumigant activity to inhibit egg hatching. Combining this fumigant activity against eggs and juveniles could be an effective strategy to control the different developmental stages of M. incognita. The combination of direct contact and attraction activities could also establish trapping and killing strategies against root-knot nematodes. Considering all nematicidal modes or strategies, we could use V. dokdonensis MCCC 1A00493 to set up an integrated strategy to control root-knot nematodes.

scholarly journals Identification of Volatile Sulfur Compounds Produced by Schizophyllum commune

2021 ◽  
Vol 7 (6) ◽  
pp. 465
Author(s):  
Takahito Toyotome ◽  
Masahiko Takino ◽  
Masahiro Takaya ◽  
Maki Yahiro ◽  
Katsuhiko Kamei
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Lead Acetate ◽  
Schizophyllum Commune ◽  
Dimethyl Disulfide ◽  
Sulfur Compounds ◽  
Volatile Sulfur Compounds ◽  
Volatile Organic ◽  
Allergic Bronchopulmonary Mycosis ◽  
Volatile Sulfur

Schizophyllum commune is a causative agent of allergic bronchopulmonary mycosis, allergic fungal rhinosinusitis, and basidiomycosis. Diagnosis of these diseases remains difficult because no commercially available tool exists to identify the pathogen. Unique volatile organic compounds produced by a pathogen might be useful for non-invasive diagnosis. Here, we explored microbial volatile organic compounds produced by S. commune. Volatile sulfur compounds, dimethyl disulfide (48 of 49 strains) and methyl ethyl disulfide (49 of 49 strains), diethyl disulfide (34 of 49 strains), dimethyl trisulfide (40 of 49 strains), and dimethyl tetrasulfide (32 of 49 strains) were detected from headspace air in S. commune cultured vials. Every S. commune strain produced at least one volatile sulfur compound analyzed in this study. Those volatile sulfur compounds were not detected from the cultures of Aspergillus spp. (A. fumigatus, A. flavus, A. niger, and A. terreus), which are other major causative agents of allergic bronchopulmonary mycosis. The last, we examined H2S detection using lead acetate paper. Headspace air from S. commune rapidly turned the lead acetate paper black. These results suggest that those volatile sulfur compounds are potent targets for the diagnosis of S. commune and infectious diseases.

The Succession of Flies of Forensic Importance Is Influenced by Volatiles Organic Compounds Emitted During the First Hours of Decomposition of Chicken Remains

2020 ◽  
Vol 57 (5) ◽  
pp. 1411-1420 ◽  
Author(s):  
Yensy María Recinos-Aguilar ◽  
María Dolores García-García ◽  
Edi A Malo ◽  
Leopoldo Cruz-López ◽  
Samuel Cruz-Esteban ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Dimethyl Disulfide ◽  
Chrysomya Rufifacies ◽  
Dimethyl Trisulfide ◽  
Cochliomyia Macellaria ◽  
Volatile Organic ◽  
Primary Reactions ◽  
Decomposition Time ◽  
Apparent Association

Abstract After death, a series of primary reactions occur that produce volatile organic compounds (VOCs) that are released into the environment. In this study, we investigated if the succession of flies of forensic importance in the first hours after death is mediated by VOCs in order to better understanding of the ecology of necrophagous insects. In total, 685 adult insects (Diptera and Hymenoptera) were collected by traps baited with chicken remains at different decomposition times (0, 6, 12, 24, 36, or 48 h). Of the total of insects caught, individuals from six families of Diptera can be cataloged of forensic importance. The most abundant dipteran family was Piophilidae with 213 individuals, followed by Calliphoridae with 178 specimens. Of the total flies caught, 90% were females and the rest were males. Most of the caught females were categorized as gravid, which visited more often the decaying tissues compared to nongravid females. The abundance of the flies increased in the remains with a longer time of decomposition. Six VOCs emitted in different relative quantities were identified according to the decomposition time of the remains. An apparent association was observed between the emission of ρ-cresol with Lucilia eximia (Wiedemann), between the emission of phenol, dimethyl disulfide, and dimethyl trisulfide with Chrysomya rufifacies (Macquart), and between the emissions of indole with Cochliomyia macellaria (Fabricius).

scholarly journals Ecological Role of Volatile Organic Compounds Emitted by Pantoea agglomerans as Interspecies and Interkingdom Signals

2021 ◽  
Vol 9 (6) ◽  
pp. 1186
Author(s):  
Maria Vasseur-Coronado ◽  
Anthi Vlassi ◽  
Hervé Dupré du Boulois ◽  
Rainer Schuhmacher ◽  
Alexandra Parich ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Dimethyl Disulfide ◽  
Dry Weight ◽  
Plant Growth Promoting Rhizobacteria ◽  
Pantoea Agglomerans ◽  
Bacterial Cells ◽  
Tomato Plants ◽  
Tomato Seedlings ◽  
Volatile Organic

Volatile organic compounds (VOCs) play an essential role in microbe–microbe and plant–microbe interactions. We investigated the interaction between two plant growth-promoting rhizobacteria, and their interaction with tomato plants. VOCs produced by Pantoea agglomerans MVC 21 modulates the release of siderophores, the solubilisation of phosphate and potassium by Pseudomonas (Ps.) putida MVC 17. Moreover, VOCs produced by P. agglomerans MVC 21 increased lateral root density (LRD), root and shoot dry weight of tomato seedlings. Among the VOCs released by P. agglomerans MVC 21, only dimethyl disulfide (DMDS) showed effects similar to P. agglomerans MVC 21 VOCs. Because of the effects on plants and bacterial cells, we investigated how P. agglomerans MVC 21 VOCs might influence bacteria–plant interaction. Noteworthy, VOCs produced by P. agglomerans MVC 21 boosted the ability of Ps. putida MVC 17 to increase LRD and root dry weight of tomato seedlings. These results could be explained by the positive effect of DMDS and P. agglomerans MVC 21 VOCs on acid 3-indoleacetic production in Ps. putida MVC 17. Overall, our results clearly indicated that P. agglomerans MVC 21 is able to establish a beneficial interaction with Ps. putida MVC 17 and tomato plants through the emission of DMDS.

Kuantifikasi Kandungan Volatile Organic Compounds (VOC) di Kawasan Desa Sungai Rambe untuk Memprediksi Keberadaan Minyak Bumi

2019 ◽  
Vol 2 (2) ◽  
Author(s):  
Sutrisno ◽  
Rayandra Asyhar ◽  
Rahmi ◽  
Andrian Tri Kesuma Wardana
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Dimethyl Sulfide ◽  
Dimethyl Disulfide ◽  
Dimethyl Sulphide ◽  
Alpha Pinene ◽  
Volatile Organic ◽  
Carbonyl Sulphide ◽  
Hydrocarbon Compound ◽  
Three Components

Penelitian ini menggunakan metode Gore Sorber dengan menanamkan alat ke dalam tanah selama 21 hari dan pada hari ke-21 alat tersebut diambil kemudian kandungannya dianalisis dengan menggunakan GC-MS untuk mengetahui jumlah senyawa hidrokarbon yang terkandung dalam minyak bumi. Beberapa senyawa yang terdeteksi dengan metode Gore Sorber diantaranya adalah alfa pinena, dimetil sulfida, karbonil sulfide, dimetil disulfida, butana dana etana. Senyawa tersebut merupakan senyawa yang umum ditemukan pada minyak bumi dengan komposisi alfa pinena 206,34 ng; dimetil sulfida 196,65 ng; dan dimetil disulfida 205,8 ng. Tiga komponen tersebut merupakan komponen minyak bumi hidrokarbon dan non-hidrokarbon.   This research uses Gore Sorber method by implanting the tool into the soil for 21 days then taken on day 21 and directly analyzed using GC-MS instrument to know the amount of hydrocarbon compound contained in petroleum. Some of the compounds detected using Gore-Sorber are alpha pinene, dimethyl sulphide, carbonyl sulphide, dimethyl disulfide, butane and ethane. These components are typical of petroleum compounds seen from the highest components of alpha pinene 206.34 ng, dimethyl sulfide 196.65 ng and dimethyl disulfide 205.8 ng. The three components are petroleum components of hydrocarbons and non-hydrocarbons.

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