Limonene and eucalyptol rich essential oils with their antimicrobial activity from the leaves and rhizomes of Conamomum vietnamense N.S. Lý &amp;amp; T.S. Hoang (Zingiberaceae)

Nguyen, Danh Duc; Nguyen, Huu Tung; Trung, Hieu Tran; Nguyen, Dang-Khoa; Nguyen, Lien-Thuong Thi

doi:10.3897/pharmacia.70.e96946

Cited by 6 publications

(5 citation statements)

References 12 publications

(9 reference statements)

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“…Based on the micro-morphological analysis, oil cells were found in C. vietnamense leaves more than in rhizomes. This is consistent with the results of hydrolyzed distillate oil yield from leaves (0.43%) and rhizomes (0.37%) from C. vietnamense reported by Nguyen et al (2023). Rhizomes of most species within the family Zingiberaceae (e.g., Amomum tsao-ko, Z. officinale, Z. montanum, Z. zerumbet, and C. sahuynhensis) are commonly used in folklore for the flavor, color, aroma of food and the treatment of diseases including stomach problems, ulcers, gastrointestinal disorders, nausea, vomiting, sore throat, cough, common cold, bruises, wounds, rheumatism, muscular pains, atherosclerosis, and anti-cancer (Shukla and Singh 2007;Sharifi-Rad et al 2017;Van Chen et al 2022b;He et al 2023).…”

Section: Rhizomessupporting

confidence: 93%

“…Rhizomes of most species within the family Zingiberaceae (e.g., Amomum tsao-ko, Z. officinale, Z. montanum, Z. zerumbet, and C. sahuynhensis) are commonly used in folklore for the flavor, color, aroma of food and the treatment of diseases including stomach problems, ulcers, gastrointestinal disorders, nausea, vomiting, sore throat, cough, common cold, bruises, wounds, rheumatism, muscular pains, atherosclerosis, and anti-cancer (Shukla and Singh 2007;Sharifi-Rad et al 2017;Van Chen et al 2022b;He et al 2023). Nguyen et al (2023) reported that eucalyptol (49.49% in leaves oil, 40.47% in rhizomes oil), limonene (26.20% in leaves oil, 18.74% in rhizomes oil), α-pinene (4.91% in leaves oil, 3.60% in rhizomes oil), and αphellandrene (3.77% in leaves oil, 3.30% in rhizomes oil) were the main constituents in the essential oil of C. vietnamense leaves and rhizomes. It shows that the rhizome is a commonly used part.…”

Section: Rhizomesmentioning

confidence: 99%

“…A previous study reported that the essential oils of the rhizomes and leaves of C. vietnamense are effective against pathogenic microorganisms (Nguyen et al 2023). However, except for the essential oil and its anti-bacterial activity, the other information about C. vietnamense has not yet been investigated further.…”

Section: Introductionmentioning

confidence: 99%

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Morphological and anatomical studies of Conamomum vietnamense N.S. Lý & T.S. Hoang: An endemic plant from Vietnam

NHI,

CHEN,

LAM

et al. 2023

Biodiversitas

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Abstract. Nhi NTT, Chen TV, Lam DNX, Nguyen DD, Dinh QD, Linh NHK. 2023. Morphological and anatomical studies of Conamomum vietnamense N.S. Lý & T.S. Hoang: An endemic plant from Vietnam. Biodiversitas 24: 5022-5034. Conamomum vietnamense N.S. Lý & T.S. Hoang (Zingiberaceae) is an endemic plant from Vietnam. Information on the anatomical structure of leaves, roots, rhizomes, and the powder characteristics of C. vietnamense has not been reported. This study aimed to combine macro- and micro-morphological analysis to identify C. vietnamense accurately. Twenty fresh plants were randomly collected from the wild habitats in Vietnam were used for the study. Macromorphological characteristics were observed and compared to earlier research. Iodine green-carmine staining was then used to histologically examine the leaves, roots, and rhizomes. The powdered rhizome and leaf features were described via a microscope. Macromorphologically, C. vietnamense is characterized by its stout stilt roots, short petioles, oblong-lanceolate leaf blades with lightly plicate, inflorescences with obovoid, and narrowly ovate bracts, hairy underside bracteoles, bilobed calyx, yellow flowers with broadly obovate, glabrous, trilobed labellum. Micromorphologically, the anatomical features of leaves, roots, and rhizomes have similarities with those of Zingiberaceae species. The tetracytic stomata was observed on both leaf surfaces. The stomatal indexes on the abaxial and adaxial surfaces of the leaves are 8.81±0.55% and 0.1±0.06%, respectively. Calcium oxalate crystals were found in the leaf. Starch grains and reticulate xylem vessels were present only in rhizome powder. These findings are important characteristics for identifying C. vietnamense.

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Section: Rhizomessupporting

confidence: 93%

Section: Rhizomesmentioning

confidence: 99%

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Morphological and anatomical studies of Conamomum vietnamense N.S. Lý & T.S. Hoang: An endemic plant from Vietnam

NHI,

CHEN,

LAM

et al. 2023

Biodiversitas

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“…The EO yield based on the fresh weight of the sample was calculated. [14][15][16] Preparation of the Different Extracts of C. longii Flowers…”

Section: Extraction Of the Eo Of C Longii Flowersmentioning

confidence: 99%

Characterization and Evaluation of the In Vitro Antioxidant, α-Glucosidase Inhibitory Activities of Camellia longii Orel and Luu. (Theaceae) Flower Essential Oil and Extracts From Vietnam

Tran-Trung,

Nguyen,

Dung

et al. 2023

Natural Product Communications

Self Cite

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Objective/Background: Camellia longii Orel and Luu was discovered for the first time in Cat Tien National Park of Lam Dong Province, Southern Vietnam, was determined as a new species. To the best of our knowledge, this is the first report on the phytochemical and bioactivity of this species. Methods: The chemical profile of essential oil (EO) prepared from C. longii flowers was determined by GC/MS analysis and comparison of the recorded retention indices and the corresponding literature values. The total phenolic and flavonoid contents in different flower extracts were estimated by Folin-Ciocalteu and aluminum chloride methods with a spectrophotometer, respectively. The antioxidant activities of the extracts were determined by various bioassays, including DPPH free radical scavenging, ferric reducing power, and cupric reducing antioxidant capacity. The α-glucosidase inhibitory activity of the extracts was evaluated using p-nitrophenyl α-D-glucopyranoside solution as a substrate and acarbose as the positive control. Results: Fifty-seven compounds were identified from the EO of C. longii flowers. Among these, the main components were α-eudesmol (16.1%), followed by ( E)-nerolidol (13.0%), β-eudesmol (8.9%), τ-cadinol (6.5%), and γ-eudesmol (5.8%). The total phenolic and flavonoid contents were found high in ethyl acetate, n-butanol, and ethanol extracts (206.8-378.6 mg gallic acid equivalents/g crude extract and 298.5-390.3 mg rutin equivalents/g crude extract, respectively). These extracts were shown to possess potent antioxidant activities in the examined bioassays. As for the α-glucosidase inhibitory assay, the ethyl acetate, butanol, and ethanol extracts were shown to be more potent than acarbose with IC50 values of 2.16 ± 0.04, 1.95 ± 0.05, and 1.53 ± 0.04 μg/mL, respectively. Conclusion: The findings first provide the phytochemical profiles of Camellia longii Orel and Luu and its bioactivities, indicating moderate potentials in antioxidant activity and strong α-glucosidase inhibition.

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“…Mulyaningsih et al [107] evidenced antibacterial activity against E. coli with a MIC > 4 mg/mL. In comparison, Van et al reported a median MIC of 27.26 mg/mL against P. aeruginosa isolates [108]. However, EEOs recorded a moderate antibiofilm efficacy on S. aureus and E. coli strains and a substantial one against P. aeruginosa, like OEOs.…”

mentioning

confidence: 99%

Antibacterial and Antibiofilm Effects of Different Samples of Five Commercially Available Essential Oils

Neagu

Popovici

Ionescu³

et al. 2023

Antibiotics

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Essential oils (EOs) have gained economic importance due to their biological activities, and increasing amounts are demanded everywhere. However, substantial differences between the same essential oil samples from different suppliers are reported—concerning their chemical composition and bioactivities—due to numerous companies involved in EOs production and the continuous development of online sales. The present study investigates the antibacterial and antibiofilm activities of two to four samples of five commercially available essential oils (Oregano, Eucalyptus, Rosemary, Clove, and Peppermint oils) produced by autochthonous companies. The manufacturers provided all EOs’ chemical compositions determined through GC-MS. The EOs’ bioactivities were investigated in vitro against Gram-positive (Staphylococcus aureus) and Gram-negative bacteria (Escherichia coli and Pseudomonas aeruginosa). The antibacterial and antibiofilm effects (ABE% and, respectively, ABfE%) were evaluated spectrophotometrically at 562 and 570 nm using microplate cultivation techniques. The essential oils’ calculated parameters were compared with those of three standard broad-spectrum antibiotics: Amoxicillin/Clavulanic acid, Gentamycin, and Streptomycin. The results showed that at the first dilution (D1 = 25 mg/mL), all EOs exhibited antibacterial and antibiofilm activity against all Gram-positive and Gram-negative bacteria tested, and MIC value > 25 mg/mL. Generally, both effects progressively decreased from D1 to D3. Only EOs with a considerable content of highly active metabolites revealed insignificant differences. E. coli showed the lowest susceptibility to all commercially available essential oils—15 EO samples had undetected antibacterial and antibiofilm effects at D2 and D3. Peppermint and Clove oils recorded the most significant differences regarding chemical composition and antibacterial/antibiofilm activities. All registered differences could be due to different places for harvesting the raw plant material, various technological processes through which these essential oils were obtained, the preservation conditions, and complex interactions between constituents.

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Limonene and eucalyptol rich essential oils with their antimicrobial activity from the leaves and rhizomes of Conamomum vietnamense N.S. Lý & T.S. Hoang (Zingiberaceae)

Cited by 6 publications

References 12 publications

Morphological and anatomical studies of Conamomum vietnamense N.S. Lý & T.S. Hoang: An endemic plant from Vietnam

Morphological and anatomical studies of Conamomum vietnamense N.S. Lý & T.S. Hoang: An endemic plant from Vietnam

Characterization and Evaluation of the In Vitro Antioxidant, α-Glucosidase Inhibitory Activities of Camellia longii Orel and Luu. (Theaceae) Flower Essential Oil and Extracts From Vietnam

Antibacterial and Antibiofilm Effects of Different Samples of Five Commercially Available Essential Oils

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