CHARACTERISTICS OF SEED PROPAGATION SOME SPECIES OF THE GENUS PRIMULA L. (PRIMROSE) IN CONNECTION WITH THE POSSIBILITY OF THEIR PRACTICAL USE
The article presents the results of studying the characteristics of seed germination of 4 species of the genus Primula (P. macrocalyx Bunge., P. cortusoides L., P. pallasii Lehm., P. denticulata Smith.). Regular fruiting was observed in all species studied. The thousand-seed weight of different species varied from 0,05 g to 1,00 g; maximum values were found in species of Primula section. New-gathered seeds have a high germination rate of 70,7–98,7%, with the exception of P. macrocalyx (seeds did not germinate or germination was 6,7–22,0%). Maximum seed quality indicators identified in P. cortusoides. P. denticulata seeds are photosensitive. Treatment of the gibberellic acid solution induced germination of P. macrocalyx and P. pallasii seeds: germination after treatment by GA3 in 0,1% concentration was 86,7–97,3% (after 7 months storage), and 36,7–45,3% (after 31 months). The maximum content of ascorbic acid found in the leaves of P. pallasii.