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Abstract <p><i>Myrtus communis</i> L. (common myrtle) is one of the important aromatic and medicinal plants of the family Myrtaceae. Its organs contain sufficient quantities of essential oils, phenolic acids, flavonoids, tannins, anthocyanin pigments, and fatty acids, which make it a promising object for the pharmaceutical and perfume industries. In the Russian Federation, <i>M.&#xa0;communis</i> has been cultivated as an ornamental and essential oil plant on the Southern Coast of Crimea and the Black Sea coast of the Caucasus since the 19th century. In the conditions of the Southern Coast of Crimea, <i>M.&#xa0;communis</i> leaf blade and fruit morpho-anatomical characteristics were investigated. However, data on the stem structure is still limited overall. Therefore, the aims of this work were a comparative analysis of the non-woody (young) and woody stem anatomy and the detection of the localization of essential oil and phenolic compounds in its tissues. It was estimated that the young and woody stems of <i>M.&#xa0;communis</i> differed in color and shape, and a possible contribution of the axial organs to a whole portion of the essential oil yield was determined. It was shown for the first time that the woody stems of <i>M.&#xa0;communis</i> had a special type of phellem cells that were elongated in the radial direction with thin cell walls. The special structure of the secondary dermal tissue may cause freezing of shoots and limit the spread of <i>M.&#xa0;communis</i> beyond the humid and dry subtropics of the Russian Federation. Qualitative histochemical studies revealed accumulation of essential oil in the cavities of young and woody stems, with suberization of the endogenous secretory structure sheath layer cells and a tendency for their destruction as the periderm develops. Phenolic compounds are found in stem tissues, some of which are structurally linked to cell walls, while others accumulate in the protoplasts of the epidermis, parenchyma, and phloem, and the greatest quantities are in young (non-woody) organs.</p>

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Myrtus communis Stem Structure Peculiarities and Histochemical Analysis

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • I. V. Bulavin,
  • D. I. Kalmykova,
  • V. D. Konobeev,
  • L. A. Logvinenko,
  • O. M. Shevchuk

摘要

Abstract

Myrtus communis L. (common myrtle) is one of the important aromatic and medicinal plants of the family Myrtaceae. Its organs contain sufficient quantities of essential oils, phenolic acids, flavonoids, tannins, anthocyanin pigments, and fatty acids, which make it a promising object for the pharmaceutical and perfume industries. In the Russian Federation, M. communis has been cultivated as an ornamental and essential oil plant on the Southern Coast of Crimea and the Black Sea coast of the Caucasus since the 19th century. In the conditions of the Southern Coast of Crimea, M. communis leaf blade and fruit morpho-anatomical characteristics were investigated. However, data on the stem structure is still limited overall. Therefore, the aims of this work were a comparative analysis of the non-woody (young) and woody stem anatomy and the detection of the localization of essential oil and phenolic compounds in its tissues. It was estimated that the young and woody stems of M. communis differed in color and shape, and a possible contribution of the axial organs to a whole portion of the essential oil yield was determined. It was shown for the first time that the woody stems of M. communis had a special type of phellem cells that were elongated in the radial direction with thin cell walls. The special structure of the secondary dermal tissue may cause freezing of shoots and limit the spread of M. communis beyond the humid and dry subtropics of the Russian Federation. Qualitative histochemical studies revealed accumulation of essential oil in the cavities of young and woody stems, with suberization of the endogenous secretory structure sheath layer cells and a tendency for their destruction as the periderm develops. Phenolic compounds are found in stem tissues, some of which are structurally linked to cell walls, while others accumulate in the protoplasts of the epidermis, parenchyma, and phloem, and the greatest quantities are in young (non-woody) organs.