Testowano możliwość uprawy rozchodnika okazałego w doniczkach. Rozmnożono go za pomocą sadzonek pędowych w trzech terminach: 5.03., 28.04. i 27.05.1999 roku. Wszystkie rośliny niezależnie od terminu rozmnażania zakwitły w pierwszej połowie września. Okazy rozmnożone wcześniej były największe. Rośliny z ostatniego terminu sadzonkowania były najmniejsze, ale miały najładniejsze kwiatostany i efektowny wygląd. Rozchodnik okazały spełnił wymagania stawiane roślinom doniczkowym i może być w ten sposób uprawiany.
PL
The possibility of growing Sedum spectabile as a pot plant was tested. Plant material was obtained from shoot cuttings at three dates: 5 March, 28 April and 27 May. All plants, irrespective of propagation dates, bloomed in the first half of September 1999. Larger plants were achieved from earlier propagation. Plants from the last date were smaller but having the nicest inflorescences and showy appearance. Sedum spectabile satisfied the quality requirements for pot plants and it may be cultivated in such a way.
Plant regeneration was studied in petal cultures of three Sedum species: S. aizoon, S. spectabile and S. gracile. The course of morphogenesis was examined by light and electron microscopy. Histological examination revealed that morphogenesis took place as direct organogenesis, indirect organogenesis or somatic embryogenesis, depending on the species and the concentrations of growth regulators in the medium. Initial petals and explants from cultures were studied to determine the origin of organogenesis. Petal histology showed that all cells at the time of culture initiation were differentiated. Epidermal and parenchymatous cells were highly vacuolated and the parenchyma contained chloroplasts with starch grains. TEM revealed that cell dedifferentiation occurred in culture under the influence of BAP and IBA. In petal culture the first cell division started subepidermally on day 2 of culture initiation. Epidermal cells underwent regular anticlinal divisions on day 3 of culture initiation, as confirmed by histology and SEM. Direct formation of adventitious buds in petals was observed in meristematic cells dedifferentiated from the epidermis and parenchyma. In indirect organogenesis, callus tissue resulted from division of dedifferentiated parenchyma cells. Somatic embryos were formed directly from subepidermal parenchymatous cells.