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KMID : 0903619850260020150
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Journal of the Korean Society for Horticultural Science
1985 Volume.26 No. 2 p.150 ~ p.157
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Effects of Scaling Time , Temperature , and Light Condition on the Leaf Emergence of Bulblet during the Scaling of Lilium spp .
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Abstract
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The experiment was carried out to investigate the effects of scaling time, temperature, and light condition for scaling period on the leaf growth behaviour of bulblets formed from the parent scales during scaling of Lilium spp. (L. Longiflorum `Georgia´ and `Hinomoto,´ L, speciosum `Uchida,´ L. lancifolium `Tiger´) and to clarify the correlation with the leaf formation of bulblets and the changes of endogenous growth regulators in the parent bulbs or parent scales scaled with various treatments.
In certain cultivars, leaf emergence of bulblets was increased more in post-dormant bulbs than predormant and dormant ones.
Furthermore, it was recognized that leaf emergence of bulblets formed during the scaling of postdormant Easter lily bulbs was promoted at high temperature (20˚∼30℃), whereas it was promoted so both in Showy lily `Uchida´ and Tiger lily at low temperature (10˚∼15℃).
In the predormant and dormant bulbs, however, that of cultivars were inhibited at high temperatures. Days required to leaf emergece needed a longer period of time in the Showy lily and Tiger lily than Easter lily.
Dark condition during the scaling promoted the formation of stem leaf, and scaly leaf was easily formed under the light, in the all cultivars used.
In the begining period of the scaling of Easter lily `Georgia,´ dark treatment for over 70 days promoted the formation of stem leaf, only 10 days of light treatment inhibited it. All cultivars showed the activity of endogenous promoters (auxin and gibbellin like substance) markedly increased in the postdormant bulbs, however, in the predormant and dormant bulbs, growth inhibitors decreased.
Changes of endogenous promoters in the parent scales and bulblets formed during the scaling were similar to the pattern of leaf growth curve influenced by the light and dark treatment during the scaling of postdormant Easter lily `Georgia´ bulbs.
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KEYWORD
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