חיפוש מתקדם
Scientia Horticulturae
Wallerstein, I., Department of Ornamental Horticulture, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, 50250, Israel
Kadman-Zahzvi, A., Department of Ornamental Horticulture, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, 50250, Israel
Nissim, A., Department of Ornamental Horticulture, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, 50250, Israel
Stav, R., Department of Ornamental Horticulture, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, 50250, Israel
Michal, S., Department of Ornamental Horticulture, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, 50250, Israel
The role of the rhizomatous zone in the preservation of the juvenile state and in the production of basal buds and new rhizomes was studied in two Aster cultivars, 'Dark Pink Star' and 'White Butterfly', grown during winter under controlled photoperiod in a commercial greenhouse with minimum temperatures maintained at 27°C/16°C (day/night). Basal bud production was found to originate from the rhizomatous zone and to be strongly influenced by photoperiod and growth stage. Short day length (10 h sunlight) promoted and long day length (10 h sunlight + 4 h incandescent light, 3 μmol m-2 s-1 photosynthetically active radiation) retarded the production of basal buds and rhizomes in vegetative plants at different stages of development. At the transition to flowering the production of basal buds and rhizomes was increased independently of photoperiod. Under both photperiods, the application of ethephon increased the number of basal buds produced on the newly formed rhizomes. The ethephon effect was more pronounced under short day conditions even though it delayed flower initiation. Apical as well as basal meristems, detached from rosette shoots and developed in tissue culture into plantlest, retained the ability to produce leaves with juvenille morphology. The presence of a slice of rhizome attached to the basal meristem did not alter the jvenile morphology of the plantlet, but when a slice of shoot tip was attached to the apical meristem the resulting plantlet developed mature leaves. Under shortday conditions in the greenhouse, the presence of the rhizomatous zone on the rooted rosetted shoot was important for the preservation of rosette form. © 1992.
פותח על ידי קלירמאש פתרונות בע"מ -
הספר "אוצר וולקני"
אודות
תנאי שימוש
Control by photoperiod and the rhizomatous zone over the production of basal buds and the preservation of the rosette form in Aster cultivars
51
Wallerstein, I., Department of Ornamental Horticulture, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, 50250, Israel
Kadman-Zahzvi, A., Department of Ornamental Horticulture, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, 50250, Israel
Nissim, A., Department of Ornamental Horticulture, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, 50250, Israel
Stav, R., Department of Ornamental Horticulture, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, 50250, Israel
Michal, S., Department of Ornamental Horticulture, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, 50250, Israel
Control by photoperiod and the rhizomatous zone over the production of basal buds and the preservation of the rosette form in Aster cultivars
The role of the rhizomatous zone in the preservation of the juvenile state and in the production of basal buds and new rhizomes was studied in two Aster cultivars, 'Dark Pink Star' and 'White Butterfly', grown during winter under controlled photoperiod in a commercial greenhouse with minimum temperatures maintained at 27°C/16°C (day/night). Basal bud production was found to originate from the rhizomatous zone and to be strongly influenced by photoperiod and growth stage. Short day length (10 h sunlight) promoted and long day length (10 h sunlight + 4 h incandescent light, 3 μmol m-2 s-1 photosynthetically active radiation) retarded the production of basal buds and rhizomes in vegetative plants at different stages of development. At the transition to flowering the production of basal buds and rhizomes was increased independently of photoperiod. Under both photperiods, the application of ethephon increased the number of basal buds produced on the newly formed rhizomes. The ethephon effect was more pronounced under short day conditions even though it delayed flower initiation. Apical as well as basal meristems, detached from rosette shoots and developed in tissue culture into plantlest, retained the ability to produce leaves with juvenille morphology. The presence of a slice of rhizome attached to the basal meristem did not alter the jvenile morphology of the plantlet, but when a slice of shoot tip was attached to the apical meristem the resulting plantlet developed mature leaves. Under shortday conditions in the greenhouse, the presence of the rhizomatous zone on the rooted rosetted shoot was important for the preservation of rosette form. © 1992.
Scientific Publication
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