Eisuke Matsuo

Effect of bulb storage temperature on leaf emergence and plant development during scale propagation of Lilium longiflorum ‘White American’

Effects of temperature and duration of bulb storage on leaf emergence of scale bulblets and on the type of plant development were investigated in Lilium longiflorum ‘White American’. After the parent bulbs had been stored for 0, 5, 10 or 15 weeks at 30, 20, 10, or 0°C, scales collected from different parts of a bulb were scale-propagated at 25 or 14°C, or under the temperature regimes normally used in The Netherlands. Independently of the scale position, a higher storage temperature promoted leaf emergence from scale bulblets, whereas a lower temperature delayed it. Higher storage temperatures produced more epigeous type plants, especially from outer and middle scales. Sprouting of the parent bulb had no effect on leaf emergence from the scale bulblets nor on the type of plant development.

Asexual propagation of variegated Lilium longiflorum ‘Chotaro’

Abstract Scale propagation of variegated Lilium longiflorum cultivar ‘Chotaro’ produced more than 93% of variegated plants from middle scales (MS), inner scales (IS) and innermost scales (IMS). Outer scales (OS) produced a lower percentage of variegated plants and a higher percentage of non-variegated (green) plants than the other scales. A total of 875 typical variegated plants was obtained from 620 scales detached from 10 parent bulbs. Parent bulbs, of which the basal plate was wounded with a nail, produced three times more daughter bulbs than the controls. All these daughter bulbs were variegated.