Abstract
In modern biotechnological studies of economically valuable plants, numerous developments aimed at obtaining calluses are presented, in which various pathways and types of morphogenesis are induced in vitro. At the same time, such the type of morphogenesis as rhizogenesis in vitro, consisting in the formation and development of roots, but without further regeneration of plants, has not been studied sufficiently. Nevertheless, it is important to identify the tissue mechanisms of formation and development in calluses the roots as rhizogenesis structures. Using the example of calluses obtained from immature wheat embryos, it was revealed that the formation of morphogenetic foci is the basis of rhizogenesis in vitro. Anatomical characteristics of the emerging roots have been revealed, which largely coincide with similar characteristics of the cereal roots under in planta conditions. It is proposed to use morphogenic calluses in vitro as model systems for studying the rhizogenesis of intact plants.
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