Propagation of Ornamental Plants Vol. 18, № 1, 2018: 12-18 EFFECTS OF LIGHT SPECTRA AND BENZYL ADENINE ON IN VITRO ADVENTITIOUS BULB AND SHOOT FORMATION OF LILIUM REGALE E. H. WILSON Barbara Prokopiuk, Monika Cioć*, Małgorzata Maślanka, and Bożena Pawłowska Department of Ornamental Plants, University of Agriculture in Krakow, 29 Listopada 54 Avenue, 31-425 Kraków, Poland, *Fax: + 48 12 662 5269, *E-mail:
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