Palynological features and pollen germination at Scilla Bifolia L.

Abstract

The paper presents the main features palinological of Scilla bifolia L. ssp. bifolia on the one hand and the potential germination of pollen same taxon, on the other hand. Palinological measurements focused: shape, color of pollen grains, exin ornamentation, size of pollen grains, the number of germination pore/grain of pollen. Testing of germinating potential was carried out by "in vitro" on nutrient mediums with varied concentration in carbohydrate elements between 0% and 100%. The pollen germination potential of Scilla bifolia is expressed at its peak when in culture medium is sucrose 15%, 20%, 25%, 24 hours after inoculation when the number of pollen grains germinated is more than 70%. The pollen germinated "in vitro" is viable over 144 hours. The results prove a normal meiosis and well balanced male gametes, so fertile for this diploid genotype. Investigations carried provides important information in taxonomy for genus Scilla and ornamental plant breeding.