Some features of the anatomical structure of vegetative shoots species Rebutia k. schum. family Cactaceae Juss. in glasshouse conditions

The paper deals with the anatomical features of vegetative shoots of some species of the genus Rebutia K. Schum. The main methods of research are: anatomy, systematic, statistical. In the process, the following data were obtained: the species of the genus Rebutia epidermis has anticlinal walls, type of stomata - paracytic, stomatal guard cells oblong-oval; the species R. neocumingii, R. robustispina traced not significant variation in the parameters of stomatal apparatus. In R. neocumingii variability of parameters does not exceed the permissible limit and assessed as weak: bean-length cell is - 5.6%, the stomata length - 9.5%; stomata width - 14,2% (average volatility). The air temperature in the areas where it grows R. neocumingii range from 2.0 °C to 30.5 °C, and in the conditions of the protected ground of the Donetsk Botanical Garden of the air temperature is 9.0 to 27.0 °C. The above temperature range fits into the framework of the possible range of habitats of species, so the plant is in a rather favorable conditions of the protected ground, as indicated by the low variability of anatomical parameters. It was revealed that in the juvenile age condition ( j ) the species R. robustispina, R. fiebrigii there is an active work of the cambium, the formation of xylem and phloem cells. Xylem is laid to the center, in the form of small, rounded cells, and phloem to the periphery. In R. robustispina, R. fiebrigii collateral vascular bundles - open. The division of the cambium cells made tangential, one of the cambial cells remains, and the other becomes an element of the phloem or xylem. Thus, we analyzed the prospects for the use of anatomical parameters of cacti as diagnostic taxonomy of the test species.