MORPHOLOGICAL FEATURES OF LEAF TRACES IN LEAF SCARS OF ARBORIFLORA SPECIES IN PRIMORSKY KRAI
Primorsky Krai is a region with a high degree of floristic diversity and is represented mainly by forest formations. The forests of the studied subregion are of industrial importance - logging and timber processing. In the arboriflora of Primorsky Krai, there are more than 285 species, which is about 13% of the total number of species of vascular plants in Primorye Territory. Due to the fact that the main cuttings, logging and forest management work are carried out in winter, in the absence of plant leaf apparatus, there is a need for a correct systematic identification of species belonging to the group of rare and endangered. An additional tool in the correct determination of species is the morphological structure of leaf traces in leaf scars (their number and types of location). Purpose - to study the morphological features of leaf traces in leaf scars of arboriflora species of Primorsky Krai. Research methods: microscopic examination of wood sections using an MBS-9 stereoscopic microscope, phenological observations, descriptive method. Results of the work: 161 species of tree flora belonging to 35 genera and 15 families were studied. As a result of the research, it was found that 89 representatives of arboriflora have 3 traces; 38 species from 12 genera and 8 families have 1 leaf trace; in 17 species from 9 genera and 7 families, leaf traces are arranged in groups; 16 species from 11 genera and 5 families have solitary numerous (up to 34) leaf traces; in 1 species, 5 leaf traces were noted. The location of leaf marks on the leaf scar is different along the midline of the scar, in its central part, at the corners of the scar, etc.