Home – Home – Jornals – Flora and Vegetation of Asian Russia 2020 number 1

On the basis of studying the mesophyll of leaves at 69 species of plants of the Roaceae family from 49 genera and 29 species of plants of the Pinaceae family from 6 genera, information on cells of complex shape in connection with their configurations and features of location was generalized. Additionally, the data on the cellular organization of the stem chlorenchyma and generative organs for 38 species of grasses were also used. The common features in the structure of grasses and pine chlorenchyma are revealed. It is shown that the assimilative cells of complex shape are oriented by their folds and projections in three mutually perpendicular directions, so three groups are distinguished among them: cellular cells of the first and second groups, as well as lobed or folded cells. Cellular cells are located along the photosynthetic organ and differ in more or less uniform sections, while in the cells of the first group they are perpendicular to the epidermis, and in the cells of the second group - are parallel to it. In lobed cells, various protrusions of the envelope manifest on the cross-sections. There are variants of the structure of chlorenchyma with the even development of all cells or with the predominance of one or another group. Along with flat cells of complex shape, many species of grasses and pine have more complicated spatial cellular configurations. More often there are cells in which the the lobed outlines on the transverse sections are combined with the cellular contours in the longitudinal direction, while the structure of the assimilation tissue is preserved.