RESEARCH REGARDING PLANT MATERIAL FORTIFICATION OBTAINED BY MICROPROPAGATION OF SOME CULTIVARS OF SYRINGA VULGARIS SPECIES Journal title: Current Trends in Natural Sciences Authors: Mihaela Ileana Oprea, Magdalena Duţă, Manuela Elena Concioiu Subject(s): Horticulture, Soil Sciences, Ecology, Landscape, Biology, Environmental Protection