TY JOUR TI QUERCETIN AND STEVIOL GLYCOSIDES ACCUMULATION IN STEVIA REBAUDIANA PLANTS AS AFFECTED BY SUPPLEMENTARY TO THE MAIN PHOTOSYNTHETIC PHOTON FLUX UV-C IRRADIATION KW stevia KW ultraviolet KW UV-C KW LEDs KW quercetin KW steviol glycosides KW stevioside KW secondary metabolites JO Bulletin of KSAU AU Ivanitskikh, A.S. AU Tarakanov, I.G. PY 2026 IS 0 PB Krasnoyarsk State Agrarian University