Preservation of representatives the genus Drosera L. using biotechnological methods

Abstract

The peculiarities of obtaining planting material of rare representatives Drosera spatulate L. and Drosera aliciae L. using microclonal propagation in order to preserve and cultivate them in ex vitro conditions were studied. The method of sterilization of D. spatulate and D. aliciae explants with 80-90% obtaining aseptic material has been developed. The influence of different sterilization options on the development of microshoots has been studied. The best mode of sterilization is 0,1% solution of AgNO3 and 12.5% solution of H2O2. The features of organogenesis and regeneration of the whole organism from cultivated tissues and organs of Drosera L. was investigated. The effect of exogenous growth regulators at different stages of plant morphogenesis in vitro is shown. Improved conditions of rhizogenesis in vitro. It was found experimentally that MS nutrient media with the addition of 2 g∙l-1 PVP is optimal at the stage of introduction into culture in vitro D. spatulate and D. aliciae. The regeneration of microshoots of D. spatulate and D. aliciae depending on the type of explant and the composition of nutrient media was studied. Morphogenesis was most effective on nutrient media with the addition of 0.25 mg∙l-1 kinetin and on the hormone free MS media. Such cultivation conditions provided 100% regeneration of plants with a reproduction rate of 1:8. Studying the effect of cytokinins on the microclonal reproduction of D. spatulate and D. aliciae, it was found that the development and induction of multiple shoot formation in vitro is best performed on hormone free MS media. To induce the formation of the root system, it is necessary to add into MS nutrient media 0.5 mg∙l-1 IBA. According to the results of the research, a method of microclonal propagation was developed by cutting stem culture, which made it possible to obtain genetically stable, disease-free regenerating plants of D. spatulate and D. aliciae with an optimally formed root system and vegetative mass. The obtained homogeneous planting material can be used in floriculture, creation of terrariums, for pharmacological purposes and for the purpose of introduction. Keywords: Drosera L., microclonal reproduction, morphogenes.