Über die bildung von limonen und carvon im kümmel, Carum carvi

Identification of the Genotype from the Content and Composition of the Essential Oil of Lemon Verbena (Aloysia citriodora Palau)

“…As shown in Tables and , lemon verbena accessions differed in the stability of the composition of the essential oils when the environmental conditions had changed. The minor content of monoterpenes and the increase of sesquiterpenes during 2001–2002 in relation to 2002–2003 could be explained in part by the different temperatures and volatility of the constituents of the essential oils, as previously suggested by Von Schantz and Ek . According to these authors, it could be possible that the more volatile monoterpenes (e.g., limonene, neral, geranial) had evaporated more easily than the sesquiterpenes (beta-caryophyllene, ar -curcumene, caryophyllene oxide, and spathulenol), thus leading to an altered ratio between them.…”

Biosynthesis of the Monoterpenes Limonene and Carvone in the Fruit of Caraway1

“…During fruit development the content of carvone (as a percentage of fruit weight) increases at the expense of limonene, providing support for this hypothesis. However, after measuring the changes in the absolute amounts of limonene and carvone in caraway fruits and performing in vivo-radiolabeling experiments, Von Schantz and Ek (1971) and Von Schantz and Huhtikangas (1971) showed that limonene is no longer available as a precursor for carvone biosynthesis once it has been secreted into the essential oil ducts.…”

“…Whereas limonene accumulation predominates in the early stages of development, carvone accumulation predominates in the later stages such that, when the fruits mature, carvone and limonene contents are approximately equal (Von Schantz and Ek, 1971;Bouwmeester and Kuijpers, 1993;Bouwmeester et al, 1995a). Although it has been suggested that carvone and limonene accumulation continue until fruit maturity (Von Schantz and Ek, 1971;Von Schantz and Huhtikangas, 1971), Bouwmeester et al (1995a) showed that carvone and limonene accumulation ceases several weeks before.…”

Essential Oils and Related Products

“…It was shown that carvone coes not form from limonene. Von Schantz and Huhtikangas (740) used tracer analysis to study the development of limonene and carvone in caraway seed. A volatile oil obtained from cardamon seed by CO2 extraction by Meerov et al (479) proved to be of equal quality with distilled oils.…”