Suppression

Acinos genus

Category: Medicines - plant based

Type

Voluntary

Introduction and description

Acinos is a genus of around 50 species of plant of which about ten are well known and used medicinally.

Its name comes from the Greek word akinos, the name for a small aromatic plant.

Species include the following according to Kew’s Plant List:

Acinos acuminatus Friv.

Acinos acutifolius Schur

Acinos adscendens Moench [Illegitimate]

Acinos aestivalis Kit. [Unplaced]

Acinos alpinus (L.) Moench

Acinos arvensis (Schur)

Acinos baumgartenii (Simonk.) Klokov

Acinos × bolnokensis (Simonk.) Šilic

Acinos canus (Steven ex M.Bieb.) Rchb.

Acinos corsicus G.Don

Acinos eglandulosus Klokov

Acinos erectus Friv.

Acinos exiguus G.Don ex Steud.

Acinos fominii Des.-Shost.

 

 

Acinos granatensis (Boiss. & Reut.)

Acinos grandiflorus (L.) G.Don ex Loudon

Acinos graveolens (M.Bieb.) Link

Acinos herba-barona (Loisel.) G.Don

Acinos heterophyllus G.Don

Acinos hungaricus (Simonk.)

Acinos incanus Griseb.

Acinos inflectus Klokov

Acinos × jahnianus (Simonk.)

Acinos majoranifolius (Mill.)

Acinos minae (Lojac.)

Acinos montenegrinus (Sagorski) Šilic

Acinos multiflorus K.Koch ex Boiss. [Unplaced]

Acinos nanus P.H.Davis & Doroszenko

Acinos orontius (K.Malý)

Acinos patavinus (Jacq.) Pers.

Acinos pseudacinos (Lacaita) Fen.

Acinos purpurascens Pers.

Acinos rotundifolius Pers.

Acinos sardous (Asch. & Levier) Arrigoni

Acinos schizodontus Klokov

Acinos suaveolens (Sm.)

Acinos subcrispus Klokov

Acinos thubcrispus Klokov

Acinos thymoides Moench

Acinos transsilvanica Schur

Acinos troodi (Post)

Acinos villosus Pers.

Acinos vulgaris (L.) Pers.

Acinos ymoides Moench

The observations are species specific, however, the genus itself as a whole has shown antimicrobial activity and a number of the plants are also able to sequester metals, thus they are capable of being used as chelation agents.

Habitat

The plants are native to southern Europe and western Asia.

Description

Acinos is a genus of either annual or short-lived evergreen perennial woody plants. They belong to the Lamiaceae family – the ‘mints’ and share the characteristics of the mints - any plant of the family Lamiaceae (formerly Labiatae), having square stems, aromatic leaves, and a two-lipped corolla:  The family includes mint, thyme, sage, rosemary, etc  [Etymology: from New Latin labiātus, from Latin labium lip].  Acinos suaveolens’ specific epithet suaveolens, for example, means “with a sweet fragrance”.

Acinos are small, tufted, bushy or spreading plants growing to 10–45 cm tall. The 2-lipped, tubular flowers are in whorls borne on erect spike-like inflorescence produced in mid-summer.  

Cultivation

Mostly quite frost hardy, they will grow in poor soil as long as it is well drained (they do not like wet conditions) and need full sun. Propagate from seed or cuttings in spring.

Medicinal uses

Acinos features quite prominently in herbal medicine, principally because it has antimicrobial activity.  The following paper provides an example of uses in Greece:

The herbs of the "mint" group traded in the herbal market of Thessaloniki include eight taxa, members of two genera, Acinos (two species) and Mentha (four species and two hybrids).
The essential oil content of 72 samples examined ranged from traces up to 1.69ml/100g of dry weight.
Besides three almost scentless samples, the different "mints" are distinguished according to their prominent smell differences, i.e. samples with a pungent, musty and sweet type of smell. As a result, the commercial names attributed to them correspond to a particular type of smell and not to a particular taxon.
A number of 29 medicinal uses were recorded in total. In most cases uses were not associated with particular taxa but were rather determined by plant smells.
A literature survey has shown that the "mints" traded in Thessaloniki are also used as herbal medicines all over the Mediterranean area, with 67 different therapeutic uses. Among them the 22 uses, already mentioned by Dioscurides, show that the utilization of "mints" as herbal medicines in the Mediterranean countries has a long tradition.  PMID:  16962274

Please note that Acinos is not edible, it may be part of the mint family, but it is not an edible mint.  It contains chemicals such as Pulegone. Pulegone is a naturally occurring organic compound obtained from the essential oils of a variety of plants such as Nepeta cataria (catmint), Mentha piperita, and Pennyroyal. It is classified as a monoterpene. Ingestion of high doses of pennyroyal oil – which contains pulegone - has caused severe toxicity, and the shoot on Acinos according to Dr Duke contains 2,125 - 6,200 ppm of this chemical.  BUT, Pulegone is also an insecticide − the most powerful of three insecticides naturally occurring in many mint species, as such this plant could be useful as a natural insect repellant.

One area, however, where interest in the plants’ possible activity has been increasing is in its external use in treating Trichomoniasis.  Trichomoniasis is an extremely common infection worldwide. Current treatment with metronidazole is according to the medical profession “reliable and inexpensive” [sic]; however, the number of strains resistant to metronidazole is increasing and the drug may be ‘inexpensive’, but it is not free, nor is it universally available world-wide.  Furthermore, common side effects include nausea, a metallic taste, loss of appetite, headaches, and occasionally seizures.  It cannot be used in pregnancy or when breastfeeding.  So a plant based approach which does not need to be taken by mouth may prove to be cheaper and safer.

Chemical constituents

Dr Duke’s analysis – see observations, shows there to be over 30 components in the shoot of Acinos suaveolens.  Please refer to the Dr Duke database for an up-to-date list of chemicals and activities.

The analysis of the volatile components in the essential oil of ACINOS SUAVEOLENS (Sibt. and Smith) G. Donfil (Lamiaceae) by capillary GC and GC-MS, demonstrated the presence of at least 36 compounds; 32 of them were identified, corresponding to the 95.57% of the oil; 28 of these components were detected for the first time in this plant.  PMID:  17265281

The following paper, however, shows that this plant’s chemistry responds to both abiotic and biotic environmental conditions:

Thyme basil (Acinos suaveolens) growing in an area regularly grazed by mammals contains double the concentration of monoterpenoids (15.61 vs. 8.18 mg/g dry matter, P = 0.001) when contrasted with plants growing on inaccessible rock pillars and not exposed to mammalian herbivores. Thyme basil produces two monoterpenoids-menthone and R-(+)-pulegone-that show contrasting toxicity. The more toxic R-(+)-pulegone shows an increase in relative abundance (66.3% vs. 47.5%, P < 0.001) in plants exposed to browsing. [Muller-Schwarze D, Thoss V; J Chem Ecol 34 (11): 1377-81 (2008)]

Perhaps of especial interest are the number of monoterpenes all the Acinos genus contain -  including sabinene, myrcene, limonene, camphene, and borneol .  Dr Duke’s analysis tends to support the hypothesis that Acinos has a place as an external antimicrobial agent, including as a fungicide

  • 1,8-CINEOLE Shoot 5 ppm- Trichiamonicide, Candidicide, Fungicide
  • BETA-PINENE Shoot 50 ppm; - Candidicide
  • BORNEOL Shoot 25 ppm; - Candidicide, Fungicide
  • CARVACROL Shoot 15 ppm;– Trichiamonicide, Fungicide
  • CARVONE Shoot 5 ppm; - Trichiamonicide
  • GERANIAL Shoot 50 ppm;– Trichiamonicide, Fungicide
  • MENTHOL Shoot 3 ppm; - Candidicide
  • MENTHONE Shoot 150 ppm;– Candidicide, Fungicide
  • P-CYMENE Shoot 4 ppm;– Trichiamonicide, Fungicide
  • PERILLALDEHYDE Shoot 710 ppm;– Candidicide, Fungicide
  • PULEGONE Shoot 2,125 - 6,200 ppm– Candidicide, Fungicide
  • TERPINEN-4-OL Shoot 8 ppm;- Fungicide
  • THYMOL Shoot 5 ppm; – Trichiamonicide, Fungicide

 

 

 

 

References and further reading

  • J Ethnopharmacol. 2007 Jan 19;109(2):248-57. Epub 2006 Jul 25.  "Mints", smells and traditional uses in Thessaloniki (Greece) and other Mediterranean countries.  Karousou R1, Balta M, Hanlidou E, Kokkini S.
  • Planta Med. 1988 Aug;54(4):340-2.  Composition of the Volatile Oil from Acinos suaveolens.  Kokkalou E1.
  • Vrach Delo. 1966 Jul;7:95-6.  [On the pharmacology of Acinos thymoides].  [Article in Russian] Kutsevich VA, Sergienko TA. PMID: 5990720
  • Farmatsiia. 1967 Jan-Feb;16(1):34-8.  [Chemical study of flavonoids of Acinos thymoides Moench]. [Article in Russian]  Sergienko TA, Kazarnovskiĭ LS, Litvinenko VI.  PMID:  5611954J Chem Ecol. 2008 Nov;34(11):1377-81. doi: 10.1007/s10886-008-9543-y. Epub 2008 Oct 17.
  • Defense on the rocks: low monoterpenoid levels in plants on pillars without mammalian herbivores. - Müller-Schwarze D1, Thoss V.  PMID:  18925383
  • Keeler, R.F. and Tu, A.T. eds. 1991. Toxicology of Plant and Fungal Compounds. (Handbook of Natural Toxins Vol. 6)
  • Patterns And Traits Of The Endemic Plants Of Greece - Kyriacos Georghiou, Pinelopi Delipetrou ;   Botanical Journal Of The Linnean Society, Volume 162, Issue 2, 1 February 2010, https://Doi.Org/10.1111/J.1095-8339.2010.01025.X

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