VEGETATIVE ORGAN ANATOMICAL STRUCTURAL FEATURES OF SOLIDAGO CANADENSIS L. DURING THE PREGENERATIVE STAGE

Solidago canadensis L., a species of the Asteraceae family, is a well-known medicinal plant valued for its diuretic and anti-inflammatory properties. Despite its widespread distribution and pharmacological potential, the ontogenetic and anatomical development of its vegetative organs remains insufficiently studied. This study investigates the anatomical changes in the vegetative organs of S. canadensis L. across three early ontogenetic stages—seedling, juvenile, and virginile—under cultivated conditions. Anatomical observations were performed using standard histological techniques and light microscopy. The results revealed gradual and stage-specific differentiation in the epidermal, mesophyll, and vascular tissues. A significant increase in the thickness of leaf epidermal cells and mesophyll, as well as an enlargement of xylem vessel area in the roots, was observed from the seedling to virginile stages. Additionally, the presence of resin canals near the endodermis in the virginile root suggests an adaptive mechanism for enhanced stress resistance. These findings contribute to the anatomical characterization of S. canadensis and provide a foundation for future studies on its ecological adaptability and pharmacological exploitation.