The research was carried out in 2019–2020 in the laboratory of the fruit-growing department of RUЕ “Brest regional
 agricultural experimental station of the National Academy of Science of Belarus”. The objects of research were microplants
 of in vitro zoned rootstocks VPK-1, Saint Julien GF 655/2 and microplants of domestic plum varieties Vengerka Belorusskaya,
 Venera, Empress. Studies have shown that at the stage of proliferation a high propagation coefficient was achieved at the
 second passage of Empress variety, when illuminated by the spectrum “red, blue, infrared, ultraviolet” (4.7±1.17) and
 in “control” (4.3±0.32). On fourth passage of cultivation when illuminated by the spectrum “red, blue, infrared, ultraviolet”
 Empress’s variety propagation coefficient is 5.4±0.17.
 When illuminated by the spectrum “red, blue, infrared, ultraviolet” the average shoot length was the longest for the
 Vengerka Belorusskaya variety (4.5±0.68 сm), by “full spectrum” was the best variant for the Venera variety (3.3±0.34 cm).
 When evaluating the number of leaves on the shoot, the advantage of the “full spectrum” lamp for the Vengerka Belorusskaya variety (16.4±0.68 pcs) is noted.