Influence of light-emitting diodes on the efficiency of valuable woody plants micropropagation

The article presents the results of studying effect light-emitting diodes (LEDs) on efficiency micropropagation valuable woody plants. Commercial use requires optimization various parameters, including light quality and lighting regime. Nowadays, LED have become an alternative source illumination for plant tissue culture, Recently, along with medicinal herbaceous plants, tree crops also widely used as a pharmaceuticals. Therefore, it is promising to optimize technology rapid massive production current research focused analysing effects different LEDs Paulownia sp. micropropagation: white (W), red (R), blue (B), mixed (R:B), Fitotron climate chamber. fluorescent was control. Micropropagation evaluated using following parameters: height, number axillary buds, length internodes, roots, photosynthetic pigment content. P. tomentosa produced greatest roots under R LEDs, while hybrid Sieb.Zucc. × Elongata - W LEDs. In Elongata, most intense leaf internode formation observed R:B content chlorophyll b in leaves significantly higher LED, HP B LED. obtained are important contribution commercial other plants mass material biologically active properties.