Latest News on Lamiaceae Research: Sep – 2019

Impedance measurements to study the antimicrobial activity of essential oils from Lamiaceae and Compositae

A wide vary of essential oils from sage, mint, hyssop, chamomile and oregano were tested for his or her repressing effects against 9 strains of gram-negative bacterium and 6 strains of gram-positive bacterium. 3 principles were employed in describing the associate degreetimicrobial effects of the essential oils: the antimicrobial activity determined by use of an impedometric methodology, the disinfectant result determined as colony forming units once exposure to the essential oils, and also the range of apparent dead cells determined once additional enrichment. the information obtained indicate that whereas the essential oils of sage, mint, hyssop and chamomile had usually a biological process activity, the oil from oregano perceived to be disinfectant at concentrations higher than four hundred ppm, in all probability thanks to high contents in phenoplast compounds. For the opposite essential oils, the analysis was unable to clarify the antimicrobial result. [1]

Antimicrobial and Antioxidant Properties of Rosemary and Sage (Rosmarinus officinalis L. and Salvia officinalis L., Lamiaceae) Essential Oils

The essential oils of rosemary (Rosmarinus officinalis L.) and sage (Salvia officinalis L.) were analyzed by suggests that of gas chromatography–mass spectrographic analysis and assayed for his or her antimicrobial and inhibitor activities. Antimicrobial activity was tested against thirteen microorganism strains and six fungi, together with candida and five dermatomycetes. the foremost vital bactericide activity of each essential oils was expressed on E. coli, Salmonella typhi, S. enteritidis, and enteric bacteria sonei. a major rate of antifungal activity, particularly of oil of rosemary, was conjointly exhibited. inhibitor activity was evaluated as a radical scavenging capability (RSC), beside the impact on lipoid peroxidation (LP). RSC was assessed by mensuration the scavenging activity of essential oils on a pair of,2-diphenyl-1-picrylhydrazil (DPPH) and radical radicals. [2]

Antimicrobial and antioxidant activities of the essential oil and various extracts of Salvia tomentosa Miller (Lamiaceae)

This study was designed to look at the in vitro antimicrobial and inhibitor activities of the oil and numerous extracts (prepared by mistreatment solvents of varied polarity) of herb tomentosa (Miller). The oil was significantly found to possess sturdy antimicrobial activity whereas different non-polar extracts and subfractions showed moderate activities whereas polar extracts remained virtually inactive. GHz and GC/MS analyses of the oil resulted within the identification of forty four compounds, representing ninety seven.7% of the oil; β-pinene (39.7%), α-pinene (10.9%) and natural resin (9.7%) were the most elements. The samples were conjointly subjected to screening for his or her doable inhibitor activity by mistreatment a pair of,2-diphenyl-1-picrylhydrazyl (DPPH) and β-carotene-linoleic acid assays. [3]

A large-scale chloroplast phylogeny of the Lamiaceae sheds new light on its subfamilial classification

Lamiaceae, the sixth largest flowering plant family, contains quite 7000 species distributed everywhere the globe. However, though extensive progress has been created within the last 20 years, its organic process backbone has ne’er been well resolved. within the gift study, a large-scale organic process reconstruction of family Labiatae mistreatment plastid sequences was distributed with the foremost comprehensive sampling of the family thus far (288 species in 191 genera, representing about seventy eight of the genera of Lamiaceae). Twelve powerfully supported primary clades were inferred, that type the organic process backbone of family Labiatae. Six of the first clades correspond to the present recognized subfamilies Ajugoideae, Lamioideae, Nepetoideae, Prostantheroideae, Scutellarioideae, and Symphorematoideae, and one corresponds to a little of Viticoideae. [4]

Evaluation of Anti-stress Activity of Orthosiphon stamineus Benth. Lamiaceae Aqueous Leaves Extract on Wistar Albino Rats

Aim: this study was aimed to see the in-vivo anti-stress activity of Orthosiphon stamineus binary compound leaves extracts exploitation Wistar unusual person rats.

Methodology: In hypoxia stress tolerance check and noise iatrogenic check Wistar unusual person rats of either sex was willy-nilly divided into 5 teams of 4 animals every. binary compound leaves extract of Orthosiphon stamineus (200 mg/kg and four hundred mg/kg p.o) was administered for twenty one days for hypoxia stress tolerance technique, whereas fifteen days for noise iatrogenic stress technique and Last Judgement, blood was collected by retro-orbital route to estimate vegetative cell count and organic chemistry parameters (glucose, sterol, triglycerides, breadstuff & ACTH) to assess the anti-stress activity in Wistar unusual person rats. Withania somnifera (WS) (100 mg/kg p.o) was elect as reference customary. [5]

Reference

[1] Marino, M., Bersani, C. and Comi, G., 2001. Impedance measurements to study the antimicrobial activity of essential oils from Lamiaceae and Compositae. International journal of food microbiology, 67(3), (Web Link)

[2] Bozin, B., Mimica-Dukic, N., Samojlik, I. and Jovin, E., 2007. Antimicrobial and antioxidant properties of rosemary and sage (Rosmarinus officinalis L. and Salvia officinalis L., Lamiaceae) essential oils. Journal of agricultural and food chemistry, 55(19), (Web Link)

[3] Tepe, B., Daferera, D., Sokmen, A., Sokmen, M. and Polissiou, M., 2005. Antimicrobial and antioxidant activities of the essential oil and various extracts of Salvia tomentosa Miller (Lamiaceae). Food chemistry, 90(3), (Web Link)

[4] A large-scale chloroplast phylogeny of the Lamiaceae sheds new light on its subfamilial classification
Bo Li, Philip D. Cantino, Richard G. Olmstead, Gemma L. C. Bramley, Chun-Lei Xiang, Zhong-Hui Ma, Yun-Hong Tan & Dian-Xiang Zhang
Scientific Reportsvolume 6, Article number: 34343 (2016) (Web Link)

[5] Bethala, K., Mohan, R., Paramasivam, S., Supriya Veeralla, R. and Kalusalingam, A. (2018) “Evaluation of Anti-stress Activity of Orthosiphon stamineus Benth. Lamiaceae Aqueous Leaves Extract on Wistar Albino Rats”, Asian Journal of Research in Medical and Pharmaceutical Sciences, 3(2), (Web Link)