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ISHS Acta Horticulturae 517: XXV International Horticultural Congress, Part 7: Quality of Horticultural Products

EFFECT OF DIFFERENT BULB SECTIONS ON LYCORIS BULBLET MULTIPLICATION BY CHIPPING

Authors:   U. Amico Roxas, G. Iapichino, G.V. Zizzo
Keywords:   bulb section, propagation, Resurrection flower
DOI:   10.17660/ActaHortic.2000.517.11
Abstract:
The genus Lycoris consists of about 11 species all native to China and Japan. Among these species L. aurea and L. radiata deserve particular attention as outdoor and greenhouse cut flowers. Natural propagation of Lycoris is by offsets which require 1–2 years to grow into flower sized bulbs. However, multiplication rate is not satisfactory as 0.5–1 offset-bulblets per year are formed. Even though Lycoris are listed among those plants which respond to the bulb-cutting method of propagation little experimental work on bulb propagation from Lycoris chipping has been presented in the scientific literature. This paper reports on the effect of different bulb sections on in vivo bulblet multiplication of two Lycoris species. Lycoris aurea and L. radiata bulbs graded from 10 to 12 cm in circumference were used in this experiment. Bulbs were cut longitudinally by hand into one quarter (¼), one eighth (1/8), one sixteenth (1/16) sections (chips) according to the experimental treatments. Sections were vertically planted into plastic boxes filled with 50% peat and 50% perlite (v/v) and placed in an unheated glasshouse. The design was a split-plot, with Lycoris species as main plots and bulb sections as subplots. Cutting mother bulbs into sections encouraged adventitious bulblet formation. Bulblets formed more readily from ¼ and 1/8 sections than from 1/16 sections. Irrespective of the species tested, one quarter sections gave the highest number of bulblets per chip (1.1), whereas 1/16 sections showed the least regenerative capacity (0.2 bulblets per chip). L. aurea performed better than L. radiata. The use of both ¼ and 1/8 bulb sections should be considered for Lycoris commercial propagation as a maximum of 5.2 and 7.2 bulblets per mother bulb were obtained during a six month period.
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