Antimicrobial and Herbicidal Activities of the Essential Oil from the Mediterranean<i>Thymus eigii</i>

Ulukanlı, Zeynep; Çenet, Menderes; Ince, Huseyin; Yılmaztekin, Murat

doi:10.1080/0972060x.2017.1327824

Cited by 19 publications

(16 citation statements)

References 29 publications

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“…Summing up, the data reflect the high potency of T. decussatus EOs, which could be attributed to its content of terpenoid compounds, particularly the monoterpenes, such as the major compounds carvacrol and p -cymene. It is worth mentioning that p -cymene is represented as the major phytotoxic compound of many plants, such as Origanum acutidens [ 49 ], Zataria multiflora [ 50 ], Eucalyptus citriodora , Eucalyptus grandis [ 51 ], Thymbra spicata [ 52 ], Thymus eigii [ 53 ], and Thymus daenensis [ 54 ].…”

Section: Resultsmentioning

confidence: 99%

“…Thereby, it could play the main role of the phytotoxic activity of both the extracted EOs. Additionally, carvacrol was previously reported to exhibit phytotoxic activity in many plants, such as Plectranthus amboinicus [ 55 ], Melissa officinalis , Origanum vulgare [ 56 ], Zataria multiflora [ 50 ], Eriocephalus africanus [ 57 ], Origanum acutidens [ 49 ], Thymbra spicata [ 52 ], Thymus eigii [ 53 ], Satureja [ 58 ], and Thymus daenensis [ 54 ].…”

Section: Resultsmentioning

confidence: 99%

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Phytotoxic and Antimicrobial Activities of Teucrium polium and Thymus decussatus Essential Oils Extracted Using Hydrodistillation and Microwave-Assisted Techniques

Saleh

Abd‐ElGawad

Gendy

et al. 2020

Plants

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Essential oils (EOs) have been described as promising eco-friendly secondary products of aromatic plants with several biological activities. The present study aimed to characterize the chemical composition and explore phytotoxic and antimicrobial activities of Teucrium polium and Thymus decussatus EOs extracted using hydrodistillation (HD) and microwave-assisted extraction (MAE) methods. Twenty-seven and twenty-eight compounds were identified from HD and MAE extracted EOs of T. polium, respectively. The oxygenated sesquiterpenes (57.68%) were characterized as the main components of the hydrodistilled EO with a prominence of 6-epi-shyobunol (33.00%), while sesquiterpene hydrocarbons (54.48%) were the main components of the MAE method, with a prominence of delta-cadinene (25.13%). Eighteen and nineteen compounds, were characterized in T. decussatus EOs extracted using HD and MAE methods, respectively, and oxygenated monoterpenes represented the main components of both EOs with carvacrol (94.40% and 75.91%, respectively) as the main compound. The EOs extracted using the MAE method were slightly more phytotoxic than those extracted using the HD method. The T. decussatus EO extracted using the MAE method showed a higher inhibitory effect than T. polium by 16-, 32-, and 24-fold, regarding seed germination, shoot, and root growth of lettuce, respectively. Moreover, EOs extracted by HD method showed a similar pattern with 16-, 28-, and 14-fold effects. Both T. decussatus EOs exhibited potent inhibitory effect against all tested bacteria with an inhibition zone of 34–39 mm and the lowest minimum inhibitory concentration (MIC) of 0.49, 0.98, and 1.95 μg/mL against Aspergillus niger, Escherichia coli, and Staphylococcus aureus, respectively. However, the EOs of T. polium showed weak antibacterial activity and no antifungal effect. Further studies are needed for the characterization of bioactive major compounds, either singular or synergistic, at field scale and to determine their modes of action and safety.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Phytotoxic and Antimicrobial Activities of Teucrium polium and Thymus decussatus Essential Oils Extracted Using Hydrodistillation and Microwave-Assisted Techniques

Saleh

Abd‐ElGawad

Gendy

et al. 2020

Plants

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“…Monoterpenes including carvacrol, γ -terpinene, p -cymene were found to be the predominant constituents of the EO of Thymbra spicata and may be responsible for the strong phytotoxic activity reported against Zea mays , Triticum aestivum , Lactuca sativa , Lepidium sativum , and Portulaca oleracea [ 27 ]. Ulukanli, et al [ 26 ] reported that the EO of Thymus eigii exhibited significant toxic effects against Lepidium sativum , Lactuca sativa , and P. oleracea . This oil was found to be rich with monoterpenes, with thymol, carvacrol, and p -cymene the major constituents [ 26 ].…”

Section: Phytotoxic Eos Derived From Plants Rich In Monoterpenesmentioning

confidence: 99%

“…Ulukanli, et al [ 26 ] reported that the EO of Thymus eigii exhibited significant toxic effects against Lepidium sativum , Lactuca sativa , and P. oleracea . This oil was found to be rich with monoterpenes, with thymol, carvacrol, and p -cymene the major constituents [ 26 ]. Moreover, EOs extracted from Thymus daenensis collected from four different habitats inhibited germination in Avena fatua , Amaranthus retroflexus , Datura stramonium , and Lepidium sativum .…”

Section: Phytotoxic Eos Derived From Plants Rich In Monoterpenesmentioning

confidence: 99%

Phytotoxic Effects of Plant Essential Oils: A Systematic Review and Structure-Activity Relationship Based on Chemometric Analyses

Abd‐ElGawad

Gendy

Assaeed

et al. 2020

Plants

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Herbicides are natural or synthetic chemicals used to control unwanted plants (weeds). To avoid the harmful effects of synthetic herbicides, considerable effort has been devoted to finding alternative products derived from natural sources. Essential oils (EOs) from aromatic plants are auspicious source of bioherbicides. This review discusses phytotoxic EOs and their chemical compositions as reported from 1972 to 2020. Using chemometric analysis, we attempt to build a structure-activity relationship between phytotoxicity and EO chemical composition. Data analysis reveals that oxygenated terpenes, and mono- and sesquiterpenes, in particular, play principal roles in the phytotoxicity of EOs. Pinene, 1,8 cineole, linalool, and carvacrol are the most effective monoterpenes, with significant phytotoxicity evident in the EOs of many plants. Caryophyllene and its derivatives, including germacrene, spathulenol, and hexahydrofarnesyl acetone, are the most effective sesquiterpenes. EOs rich in iridoids (non-terpene compounds) also exhibit allelopathic activity. Further studies are recommended to evaluate the phytotoxic activity of these compounds in pure forms, determine their activity in the field, evaluate their safety, and assess their modes of action.

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“…Recently, there is an increasing trend by researchers, scientists, and policymakers to integrate natural, eco‐friendly, and safer compounds such as EOs. The EOs were reported as a green eco‐friendly natural product that used as antimicrobial agents [7–13] . Also, the EOs were integrated as safe and powerful antioxidant compounds used in pharmaceutical and industrial applications as well as food preservation [2,10,14–22] …”

Section: Introductionmentioning

confidence: 99%

Essential Oil of Deverra tortuosa Aerial Parts: Detailed Chemical Profile, Allelopathic, Antimicrobial, and Antioxidant Activities

Fayed

Abd-EIGawad

Elshamy³

et al. 2021

Chemistry & Biodiversity

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Essential oils (EOs) are a promising group of natural products of the aromatic plants due to their various biological effects such as allelopathic, antioxidant, antimicrobial activities. The present study aimed to construct the detailed chemical profile of the EO derived from Deverra tortuosa aerial parts along with assessing its allelopathic, antimicrobial, and antioxidant potentialities. The EO was extracted by hydrodistillation and analyzed via gas chromatography‐mass spectrometry (GC/MS). The allelopathic activity of the EO was assessed against the germination and seedling growth of the weed Chenopodium murale. Also, the EO was tested against five microbes. The antioxidant activity was determined using the free radical 2,2‐diphenyl‐1‐picrylhydrazyl (DPPH) and 2,2′‐azinobis(3‐ethylbenzothiazoline‐6‐sulfonic acid) (ABTS). The GC/MS analysis of EO revealed the presence of 86 compounds with a preponderance of oxygenated sesquiterpenes and monoterpene hydrocarbons. Widdrol, β‐phellandrene, piperitol, cubedol, α‐terpinene, (E)‐10‐heptadecen‐8‐ynoic acid methyl ester, citronellyl tiglate, and m‐cymene were the major compounds. A comparative profile was established between the EOs constituents of our study with the documented EOs of D. tortuosa and the other Deverra species around the world via agglomerative hierarchical clustering (AHC) and principal components analysis (PCA). The EO showed a substantial allelopathic activity against C. murale, as well as it showed considerable antimicrobial and antioxidant activities. Thereby, the EO of D. tortuosa could be considered as a promising environmental‐friendly bioherbicide against weeds. Also, it could be integrated into food preservation due to its potent antimicrobial and antioxidant activities. However, further study is recommended for more characterization of the major compounds and evaluation of their activities, either singular or synergistic, and assess their efficiency and biosafety.

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Antimicrobial and Herbicidal Activities of the Essential Oil from the MediterraneanThymus eigii

Cited by 19 publications

References 29 publications

Phytotoxic and Antimicrobial Activities of Teucrium polium and Thymus decussatus Essential Oils Extracted Using Hydrodistillation and Microwave-Assisted Techniques

Phytotoxic and Antimicrobial Activities of Teucrium polium and Thymus decussatus Essential Oils Extracted Using Hydrodistillation and Microwave-Assisted Techniques

Phytotoxic Effects of Plant Essential Oils: A Systematic Review and Structure-Activity Relationship Based on Chemometric Analyses

Essential Oil of Deverra tortuosa Aerial Parts: Detailed Chemical Profile, Allelopathic, Antimicrobial, and Antioxidant Activities

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