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  • Yield, content, and composition of peppermint and spearmints as a function of harvesting time and drying.

    Author(s) : Zheljazkov, V. D.Cantrell, C. L.Astatkie, T.Hristov, A.

    Author Affiliation : North Mississippi Research and Extension Center, Mississippi State University, 5421 Highway 145 South, Verona, MS 38879, USA.

    Author Email : vj40@pss.msstate.edu

    Journal article : Journal of Agricultural and Food Chemistry 2010 Vol.58 No.21 pp.11400-11407 ref.40

    Abstract : Peppermint (Mentha × piperita L.) and spearmints ('Scotch' spearmint, M. × gracilis Sole, and 'Native' spearmint, Mentha spicata L.) are widely grown essential oil crops in more northern latitudes; however, there is limited information on how harvest time and drying influence peppermint and spearmint yield, oil composition, and bioactivity, when grown south of the 41st parallel. In this 2-year study, the effects of harvest time and drying on the yield, oil composition, and bioactivity of peppermint ('Black Mitcham' and 'B90-9'), 'Scotch' spearmint, and 'Native' spearmint were evaluated. Peppermint oil from the dried material had higher menthol and eucalyptol concentrations. Menthone in both peppermint cultivars decreased from harvest 1 (late June) to harvest 5 (late August) or 6 (early September), whereas menthol increased. (-)-Carvone in spearmints accumulated early, before flowering, allowing for early harvest. Oil yields from the dried spearmint biomass reached the maximum at harvest 3 (mid-July). The essential oil compositions of the four mint genotypes were similar to that of 11 commercially available oils, suggesting that these genotypes can be grown in the hot, humid environment of the southeastern United States. The antioxidant activities (ORACoil values) of the essential oils were 4372, 1713, 1107, and 471 µmol of TE L-1 for 'Scotch' spearmint, 'Native' spearmint, peppermint, and Japanese cornmint (Mentha canadensis), respectively. The oils of the four mint genotypes did not affect ruminal fermentation in vivo, and did not exhibit antimicrobial, antileishmanial, or antimalarial activity at levels that would warrant bioassay-directed fractionation in a drug-discovery screening program. Specifically, the oils did not show greater than 50% growth inhibition against Leishmania donovani, Plasmodium falciparum clones D6 and W2, Candida albicans, Escherichia coli, Pseudomonas aeruginosa, Cryptococcus neoformans, Mycobacterium intracellulare, or Aspergillus fumigates at 50 µg mL-1.

    ISSN : 0021-8561

    DOI : 10.1021/jf1022077

    URL : http://pubs.acs.org/.../index.html

    Record Number : 20103380365

    Publisher : American Chemical Society

    Location of publication : Washington

    Country of publication : USA

    Language of text : English

    Language of summary : English

    Indexing terms for this abstract:

    Organism descriptor(s) : Aspergillus fumigatus, Candida albicans, Cryptococcus neoformans, Escherichia coli, Leishmania donovani, Mentha, Mentha canadensis, Mentha gracilis, Mentha piperita, Mentha spicata, Mycobacterium intracellulare, plants, Plasmodium falciparum, Protozoa, Pseudomonas aeruginosa

    Descriptor(s) : antibacterial properties, antifungal properties, antioxidant properties, antiprotozoal properties, chemical composition, crop yield, cultivars, drying, essential oil plants, essential oils, eucalyptol, flowering, genotypes, harvesting date, infections, menthol, oil plants, parasites, parasitoses, pathogens, plant composition, protozoal infections

    Identifier(s) : anthesis, anti-fungal properties, anti-oxidant properties, anti-protozoal properties, bactericidal properties, bacterium, cajeputol, chemical constituents of plants, cineol, cineole, cultivated varieties, E. coli, essential oil crops, eucalyptole, fungicidal properties, fungus, harvest date, limonene oxide, mint, parasitic diseases, parasitic infestations, parasitosis, protozoal diseases, United States of America

    Geographical Location(s) : USA

    Broader term(s) : Aspergillus, Trichocomaceae, Eurotiales, Eurotiomycetes, Pezizomycotina, Ascomycota, fungi, eukaryotes, Candida, Saccharomycetales, Saccharomycetes, Saccharomycotina, Cryptococcus (Fungi), Tremellaceae, Tremellales, Tremellomycetes, Agaricomycotina, Basidiomycota, Escherichia, Enterobacteriaceae, Enterobacteriales, Gammaproteobacteria, Proteobacteria, Bacteria, prokaryotes, Leishmania, Trypanosomatidae, Kinetoplastida, Sarcomastigophora, Protozoa, Lamiaceae, Lamiales, eudicots, angiosperms, Spermatophyta, plants, Mentha, Mycobacterium, Mycobacteriaceae, Corynebacterineae, Actinomycetales, Actinobacteridae, Actinobacteria, Plasmodium, Plasmodiidae, Haemospororida, Apicomplexa, Pseudomonas, Pseudomonadaceae, Pseudomonadales, APEC countries, Developed Countries, North America, America, OECD Countries