Effect of the storage of cuttings in the rooting of different chrysanthemum cultivars (Dendranthema grandiflora Tzvelev) in two seasons
K.F.L. Pivetta and J.B.S.A. Almeida
Proceedings of XXVI International Horticultural Congress & Exhibition, Toronto, Canada, 2002. Vol. 1. p. 493-494.
2002
บทคัดย่อ
Chrysanthemum (Dendranthema grandiflora Tzvelev) is commercially propagated by cuttings. Pre-rooting storage of cuttings, in the dark, is a common practice among producers and compaines that work and trade with chrysanthemum cuttings. However, the maximum period of storage cutting and differences of tolerance among cultivars have been investigated. In this context, the aim of this work was to determine the effect of time of cold storage of cuttings (0, 1, 2, 3, 4, 5 and 6 weeks) on rooting of four chrysanthemum cultivars (Super White, Sheena, Dark Orange Reagan and Town Talk) in two seasons of the year (summer and winter of 2000) and also to analyse the origin of root formation in chrysanthemum cuttings. The experiment was arranged in a complete randomized design with 5 replications for each storage each storage treatment. Each plot was constituted by three cuttings that were evaluated after 14 days after the cutting practice. In winter, cold storage affected cutting rooting, mainly after two weeks of storage for all cultivrs. The rooting percentage was inferior in the winter and the cuttings were conserved for a shorter period. The source and growth of roots in chrysanthemum cutting is endogenous. After three days, the callus was formed in the percycle and the first emergence of the adventitious roots occurred at the fourth day of rooting.