The effect of different illumination levels on the germination of Psidium guajava L. seeds in the greenhouse complex of the Donetsk Botanical Garden was studied. It was determined that a 25 and 50 % decrease in the illumination level reduces the germination of P. guajava seeds by 22.5 % and 42.5 %, whereas the light level of 7124.3 ± 242.7 lux (without shading) facilitates germination of this species in 6,7 days earlier compared to the conditions when it was reduced by 25 % and 50 %. The statistical significance of the illumination level effect on the germination rates in P. guajava seeds was revealed.

Zagumenny R.A., Nikolaeva A.V., Panchenko M.M.