Page 172 - Zbornik_Konf_2019

https://doi.org/10.15414/2019.9788055220703

4 International Scientific Conference Abstracts Book
th
MORPHOLOGICAL AND ANATOMICAL FEATURES OF LEAVES STRUCTURE SPECIES OF
GENUS THYMUS L., INTRODUCED IN BOTANICAL GARDEN OF IVAN FRANKO NATIONAL
UNIVERSITY OF LVIV
Myroslava Hrytsyna , Mariya Skybitska , Ivan Salamon
2
3
1
1 Stepan Gzhytskyi National University of Veterinary Medicine and Biotechnologies, Lviv, Ukraine; Е-
mail.: hrytsynamr@gmail.com
2 Botanical Garden of Ivan Franko National University of Lviv, Ukraine
3 University of Presov, Slovak Republic
Introduction of local and outlander flora species have great meaning in the extension of
an assortment of medical plants. Species of genus Thymus L. are rich in essential oils that
demonstrate antimicrobial, antioxidant features and are used in medicine, aromatherapy,
cosmetology, and cooking.
The aim of work is the exploration of morphological and anatomical features of the
structure of leaves of species of genus Thymus, which are exhibited at a ‘medical plants’
collection in Вotanical Garden of Ivan Franko National University of Lviv, namely Th. vulgaris L.,
Th. zygis L. and Th. camphoratus Hoffmanns. Link (Mediterranean species); Th. Callieri Borb.
and Th. serpyllum L. (Ukrainian species). Anatomical structure studies of a lamina of leaves
were conducted with the help of ‘Leica DM 500’ microscope.
Raw of species of genus Thymus is aboveground mass on a stage of flowering. Pubescent
leaves and the presence of essential oils for its identification structure of leaves are used. In
explored species leaves are contrary crisscrossed, in the lower part of sprout they are small
petioled and upwards they become sedentary. The pattern of the lamina is changed in a
similar way. In all species, these laminas are wrapped up and only in Th. serpyllum they are
straight.
Pubescence of leaves is made of simple, non-glandular hairs and glandular essential oils
(capitate and peltate) trichomes. In Th. vulgaris, Th. callieri and Th. serpyllum leaves are green,
over the edge of lamina they have pubescence of long, 5–7 cellular impacted hairs and
between them short, 1–3 cellular hairs are situated. Simple hairs also are situated along veins
as well. Leaves of Th. zygis are grey because of thick pubescence, especially from below. It is
created of a single cell, upwards sharpened hairs, and two-cell geniculate curved hairs, where
three cellular hairs can be met. In all of the species capitate trichomes with unicellular gland,
sedentary or unicellular stalk are situated on the surface of a lamina. Except this, on the
surface of lamina essential peltate hairs with multicellular gland are situated. Its amount is
bigger on the abaxial surface of a leaf than on an adaxial surface. In Th. camphoratus there are
much more trichomes than in all of the other species.
Cells of the upper epidermis of Th. vulgaris are oval, sometimes vaguely pentagonal from
the upper side and with weakly winded anticline walls from inside. In Th. zygis they are multi
oval. Th. callieri and Th. serpyllum has epidermis cells with winding walls. Stomata apparatus
is of a diacetate type. The amount of stomata’s is bigger from the abaxial side than from
adaxial surface leaves.
Essential oil fittings are situated above big veins in mesophile of a leaf. Their numerous
cells contain thick cytoplasmic content, only Th. camphoratus does not contain inner fittings.
Summing it up, features that are listed above can be used for identification of medical
raw of explored essential species of genus Thymus.

Keywords: Thymus spp., morphology and anatomy, leaves, trichomes.

|172 4 International Scientific Conference Agrobiodiversity Nutrition, Health and Quality of Human and Bees Life
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September 11–13, 2019