IMPACT OF LIGHTING QUALITY AND THE NUTRIENT MEDIUM COMPOSITION ON THE GROWTH AND DEVELOPMENT OF POTATO PLANTS IN VITRO
The results of potato seed production depend on many factors. The quality of lighting and the nutrient medium composition are among the most important. To determine the optimal parameters of lighting and nutrient medium appropriate studies using early ripening potato varieties Zhukovsky Early and Udacha, as well as a promising hybrid of our own selection (11.26/28) were carried out. It was revealed that the requirements of different potato genotypes to lighting conditions and the nutrient medium composition are not the same. The optimal parameters of lighting conditions and the nutrient medium composition were determined. The best development indicators of the tested potato genotypes’ microplants were noted. The range of 400-700 nm was determined by the optimal light radiation and 2 % sucrose concentration was the most acceptable in the nutrient substrate for the variety Zhukovsky Early. Variety Udacha showed the best performance when illuminated with a light flux with a wavelength of 610 nm and 3 % sucrose in a nutrient medium. Light exposure in the range of 610 nm and the presence of 5 % sucrose in the nutrient medium turned out to be the most preferable for the hybrid 11.26/28.