Leaves surface of Ginkgo biloba L. in heat conditions (in Kyiv city)

Abstract

Objective — to investigate the anatomical and morphological structure of Ginkgo biloba leaves in the heat conditions of Kyiv. Material and methods. The study was carried out on the territory of Academician O.V. Fomin Botanical Garden and M.M. Gryshko National Botanical Garden of the NAS of Ukraine. It was used light and scanning electron microscopy. Results. The investigated plants in O.V. Fomin Botanical Garden have hipostomatic leaves. Adaxial epidermis is formed by polygonal cells. The epidermal tissue cells are large (773.3 cells per 1 mm2). External periclinal walls are curved. The boundaries between the cells are obscure. The surface relief is colycular. Epicuticular wax is present (represented by piddling wax sticks). Abaxial epidermis is formed by epidermal cells and stoma complex. Epidermal cells are polygonal or isodiametral. External periclinal walls of epidermal cells are curved and have papillas formed by external periclinal walls. Epicuticular wax is well-developed, represented by wax sticks. Stomata are not oriented by their stomatal slits along leaf vein and are located between main fascicles, under the level of main epidermal cells. Number of stomata is low (168.6 per 1 mm2). In M.M. Gryshko National Botanical Garden G. biloba trees are characterized by similar micromorphological structure of leaf plates and almost identical to plants from O.V. Fomin Botanical Garden by their epidermal tissue structure. Differences are related to quantitative indicators (plants from M.M. Gryshko National Botanical Garden have more developed epicuticullar wax on both of epidermises, number of stomata per 1 mm2 — 165.3). Conclusion. Taking into account the existing global climate change in the direction of aridization Gingko biloba is promising for use in park landscaping.