Composition and antifungal activity of essential oils of Mentha piperita and Lavendula angustifolia on post-harvest phytopathogens
ABSTRACT The general antifungal activity of essential oils is well documented. The advantage of essential oils is their bioactivity in the vapor phase, a characteristic that makes them attractive as possible fumigants for stored product protection. Essential oils of aerial parts of Mentha piperita and Lavendula angustifolia were obtained with hydrodistillation and oils composition identified with GC-MS. Menthanol (36.24%) and menthone (32.42%) were the major compounds of the M. piperata essential oil. The essential oil of L. angustifolia was rich in linalool (49.2%) , linalyl acetate (12.3%), Lavendul acetate (6.5%), 4-terpineol (5.9%). Fungal toxicity of the essential oils were evaluated against three pathogenic fungi (Rhizopus stolonifer, Botrytis cinerea and Aspergillus niger) in vitro. Plate assayes showed that the different concentrations of essential oils have antifungal activity against these fungi, and the essential oil of L. angustifolia showed stronger fungistatic activity. Lavendula oil exhibited complete growth inhibition of all pathogens at 1000 ppm and minimum EC50 (311.24 ppm) resulted on B. cinerea.
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- "Because of their cooling, pleasant aroma and flavor, essential oils of mint are used in perfumery, cosmetics, confectionery, and the pharmaceutical industries. The oil of M. piperita, known as peppermint oil, is widely used for headache, nerve pain, toothache, oral inflammation, joint conditions, itchiness, allergic rash, repelling mosquitoes, rheumatism, muscular pains, etc.  . Menthol is the major constituent of the essential oil constituents of peppermint oil . "
ABSTRACT: EST sequences of M. piperita available in the public domain (NCBI) were exploited to develop SSR markers. A total of 1316 ESTs were assembled into 155 contigs and 653 singletons and of these, 110 sequences were found to contain 130 SSRs, with a frequency of 1 SSR/3.4 kb. Dinucleotide repeat SSRs were most frequent (72.3%) with the AG/CT (43.8%) repeat motif followed by AT/AT (16.2%). Primers were successfully designed for 68 SSR-containing sequences (62.0%). The 68 primers amplified 13 accessions of M. piperita and 54 produced clear amplicons of the expected size. Of these 54, 33 (61%) were found to be polymorphic among M. piperita accessions, showing from 2 to 4 alleles with an average of 2.33 alleles/SSR, and the polymorphic information content (PIC) value varied between 0.13 and 0.51 (average 0.25). All the amplified SSRs showed transferability among four different species of Mentha, with a highest in M. arvensis (87.0%) and minimum in M. citrata (37.0%). The newly developed SSRs markers were found to be useful for diversity analysis, as they successfully differentiated among species and accessions of Mentha.02/2015; 22. DOI:10.1016/j.cj.2015.02.002
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- "Two broad morphological types of glandular trichomes: capitate and peltate have been defined in plants. Abundance of glandular trichomes in plants and their relationship with essential oil production in many plants including peppermint (McCaskill and Croteau 1995; McCaskill and Croteau 1999; McConkey et al. 2000; Lange et al. 2000; Turner et al. 2000a, b; Mahmoud and Croteau 2003; Mahmoud et al. 2004; Ringer et al. 2005; Hyatt et al. 2007), lima bean (Bartram et al. 2006; Pinto et al. 2007), Lavender (Behnam et al. 2006; Bertomeu et al. 2006), and tomato (Li et al. 2004; Enfissi et al. 2005; Fridman et al. 2005), have been discussed, which has enriched our understanding of isoprenoid biosynthesis in plants. "
ABSTRACT: The terpenoids, or isoprenoids, are a large family of natural products that are best known as constituents of the essential oils in plants. Because of their pleasant flavor and aromatic properties, essential oils have an economic importance in perfumery, cosmetic, pharmaceutical and various other industries. However, expression profiles of regulatory genes in essential oil production have not been dissected entirely, which may be an interesting topic of future research. In this report, we review recent studies on isoprenoids biosynthesis in plants. We also discuss the progress of our recent research activities on isoprenoid studies.Acta Physiologiae Plantarum 01/2009; 31(1):13-19. DOI:10.1007/s11738-008-0214-y · 1.52 Impact Factor
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ABSTRACT: S u m m a r y The aim of this study was the estimation of influence of essential oils deriving from two varieties of peppermint: white mint (Mentha x piperita L var. officinalis Sole f. palles-cens Camus) and bergamot mint (Mentha x piperita L. var. citrata Ehrh.), on the growth of some filamentous fungi: Aspergillus niger, Botrytis cinerea, Eurotium amstelodami, Eu-rotium chevalieri, Penicillium cyclopium and Trichothecium roseum. The oils were extracted from dried, ground herb by means of hydro-distillation method. The disc diffusion method was used to estimation an antifungal activity of oils (doses of oil: 10 and 5 µl/disc). The diameters of growth inhibition zones were measured and expressed in mm. It was stated that the oils from both varieties of peppermint inhibited the growth of all tested fungi. The activity of oils was significantly differentiated in dependence on kind of oil, dose of oil and species of fungi. The oil from bergamot mint (in both doses) was more effective to most of the tested strains than the oil from white mint. It also possessed a greater content of carvone and pulegone. Usually, the inhibition growth zones at the oil dose of 10 µl/disc were proportionally bigger than at dose of 5 µl/disc. The strains of P. cyclopium and A. niger were most resistant to the influence of both oils – the average inhibition growth zones were 12.4 and 16.7 mm, respectively. E. chevalieri and E. amstelodami were most sensitive – average zones of their growth inhibition amounted to 90.0 and 75.9 mm, respectively.