Histoanatomical research regarding the vegetative organs of origanum vulgare l
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BOZ, Irina, NECULA, Radu Dan, BUDEANU, Oleg, GHITA, Georgiana, GILLE, Elvira. Histoanatomical research regarding the vegetative organs of origanum vulgare l. In: Conservation of plant diversity, Ed. 3, 22-24 mai 2014, Chișinău. Chișinău: Gradina Botanica (Institut), 2014, Ediția 3, pp. 9-10. ISBN 978-9975-62-370-4.
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Conservation of plant diversity
Ediția 3, 2014
Simpozionul "Conservation of plant diversity"
3, Chișinău, Moldova, 22-24 mai 2014

Histoanatomical research regarding the vegetative organs of origanum vulgare l


Pag. 9-10

Boz Irina1, Necula Radu Dan2, Budeanu Oleg3, Ghita Georgiana2, Gille Elvira2
 
1 Institute of Biological Research, Iasi,
2 Center of Biological Sciences „Stejarul”, Piatra Neamţ,
3 University of the Academy of Sciences of Moldova
 
Disponibil în IBN: 17 mai 2019



Teza

The species Origanum vulgare L. is one of the most variable species of the genus and is commonly known as oregano in the most European countries (Vokou et al. 1993, Tucker and Maciarello 1994). The leaves of this species are rich in essential oil, being widely used as a very popular spice for food production. Lately, this species has been granted with a special attention due to the antifungal, antimicrobial, insecticidal and antioxidative effects (Kokkini 1997, Bakkali et al. 2008). In this paper, the authors analyze the structure of vegetative organs of Origanum vulgare L., evidencing the constant and particular histo-anatomical features of this species. Peculiar attention has been given to the structure, distribution and morphology of the glandular hairs. Material and methods The vegetal material under study is represented by Origanum vulgare L., collected from different areas of Moldova, during 2013. All taxa were collected during anthesis, in order to highlight any differences that may occur in the structure of vegetative organs, differences that can be given by geographical position. In order to fulfi ll the present study, the vegetal material has been fi xed and preserved in 70% ethylic alcohol. The sections were cut with a microtome and a botanical razor. The vegetative organs were cross sectioned, on different levels, from the top to the basis. The obtained sections were then coloured with iodine green and alaun-carmine. The next stage was mounting the sections in gel. The micrographs were performed by means of a Novex (Holland) microscope, using a Sony (Cubershot) camera. Results and discussions Our investigations dealt with the aerial vegetative organs (the stem and the lamina) of Origanum vulgare L., underlining a few histo-anatomical aspects; a very important issue being the structure of the secretory trichomes. After analyzing the studied taxa, there were no signifi cant differences from histoanatomical point of view, the structure being one specifi c to the species of the Lamiaceae family. Regarding the glandular hair, two types of glandular hair were distinguished: capitates hairs and peltates hairs. After analyzing histo-anatomical peculiarities, the studied plants were analyzed from phytochemical point of view, highlighting the content of active principles with antioxidant activity (fl avones and polyphenols). Also, it was evaluated the amount of essential oil, highlighting a great chemical variability. Conclusions Following research carried out there were no signifi cant differences in the structure of vegetative organs, according to geographical position. Regarding the secretory hairs, responsible for secretion of essential oils, it was observed that they are more numerous in the leaf lamina, especially in the upper epidermis. These studies are the part of Moldova-Romanian project “Genetic intraspecifi c polymorfysm analysis for the elaboration of molecular markers of some medicinal and aromatic plants chemotypes”.