Seasonal variation in content, chemical composition and antimicrobial and cytotoxic activities of essential oils from four Mentha species

Abstract

Of the Mentha essential oils tested, M. arvensis essential oil showed relatively better antimicrobial and cytotoxic activities. A significant variation in the content of most of the chemical components and biological activities of seasonally collected samples was documented.

Effect of essential oils of medicinal plants on leaf blotch in Tanzania grass

“…The essential oil of the peppermint (Mentha piperita L. (Lamiaceae)) has high antimicrobial potential against phytopathogens Aspergillus flavus and A. niger (HUSSAIN et al, 2010). The antimicrobial action of the oils from the neem (Azadirachta indica A. Juss.…”

Chemical Composition, Antioxidant and In vitro Antibacterial Activities of Essential Oils of Mentha spicata Leaf from Tiaret Area (Algeria)

“…Many previous studies reported a small MIC ranging from 0.21 ± 0.01mg/ml, 0.345 ± 0.01mg/ml to 0.349 ± 0.008 mg/ml against E. coli. 18,24 Likewise, Martins et al 22 showed the MIC values ringing from 250 µg/ml to 500 µg/ml against E. coli, Salmonella enteritidis and Klebsiella pneumonia. The lowest value of MIC < 3.5μg/ml was reported by Sarer et al 36 M. spicata essential oil was detected as active against only Klebsiella spp.…”

“…23 The difference in yield can be attributed to the harvest season of the plant when a high essential oil yield was seen in summer (when the plants were in full bloom) than in winter (when the plants reached the end of their growing cycle). 7,24,25 The composition of essential oils of M. spicata is presented in table 1. One hundred and sixteen compounds were identified accounting for 99.92% of the total amount.…”

“…17 M. spicata growing in other countries also contains carvone as one of the major components of its essential oil, e.g., Portugual (41.1%) 22 , Morocco (29.0%) 26 , Bangladesh (73.29%) 20 and Serbia (49.52%). 15 Nevertheless, Dhifi et al 27 24 Other explanation for the differences in oil content and composition may be attributed to factors related to ecotype, phenophases, temperature, relative humidity, photoperiod, irradiance, genotype, and agronomic conditions (harvesting time, plant age, crop density). 5 In addition, the duration of sunshine, the movement of air and precipitation can play roles in the difference in composition of essential oils.…”

Chemical Composition and Antibacterial Activity of Essential Oils From Azorella Spinosa (Apiaceae) Against Wild Phytopathogenic Bacteria

“…Generally, these compounds determine the biological properties of the oils 25 . The chemical composition of plants can be subject to quantitative and qualitative variation, however biological activity is similarly subject to variation 36,37,38 . In this study A. spinosa was collected in the same place but at different times and years, however, in the same period spring summer of southern hemisphere.…”