ECOLOGICAL ANATOMICAL STUDY OF STRUCTURAL-PLASTIC RESPONSE REACTIONS OF THE MEDICINALLY IMPORTANT SPECIES LAURUS NOBILIS (LAURACEAE) IN VARIOUS ECOLOGICAL CONDITIONS | Anatomical study of Laurus nobilis

The aim of the research is to carry out comparative ecological anatomical analyses to study the structural anatomical differences that may arise under the influence of environmental factors in representatives of the plant species Laurus nobilis collected from various ecosystems of the Republic of Azerbaijan. During the scientific investigation, in order to determine the internal anatomical structures and to obtain the necessary descriptive materials, samples were taken from specific organs of the plant, preserved in fixative, and prepared for sectioning under laboratory conditions. Cross-sections obtained from leaves, petioles, and stems were processed with histochemical reagents, and permanent preparations were made from them. These preparations were analyzed using a light microscope, and the necessary photomicrographs were taken. Based on microscopic observations and references to bibliographic databases, the structural-functional dependencies in the different organs of the plant were explained. During the research, microscopic analysis revealed the formation of trichomes in the leaf of the L. nobilis species collected from Toghanali. Additionally, it was determined that all vegetative organs of the three ecotype samples studied in comparison contained schizogenous secretion cavities, which is an endogenous secretion tissue structure that confirms the species' phytotherapeutic value. In addition, lysigenous cavities and various ergastic and constitutional substances accumulated in the cells were identified in the cortex region of each analyzed vegetative organ. In the leaf of the sample collected from Ganja area, parenchymatic excretion was observed as an adaptation characteristic to the ecosystem of the region. Based on histo-anatomical studies, differences were noted both in the structural characteristics of the species and in the local concentrations, which can be considered as an ecotopic characteristic of the L. nobilis species.