ISHS Acta Horticulturae 813: VI International Symposium on New Floricultural Crops
EFFECT OF TEMPERATURE ON THE ADVENTITIOUS BUD FORMATION BY LEAF CUTTING OF HELONIOPSIS LEUCANTHA |
| Authors: | I. Nishida, T. Takagi, T. Koutaka, H. Yamazaki, A. Hasegawa |
| Keywords: | endangered plant, Liliaceae, ornamental value, propagation, adventitious root |
| Abstract:
Heloniopsis leucantha (Liliaceae) is an evergreen perennial plant that inhabits parts of Okinawa and Kagoshima, Japan. It is an endangered species and sometimes admired as a potted plant. The effect of temperature on adventitious bud formation in leaf cutting propagation was investigated to meet the supply of young plants. Leaf cutting was taken on May 15, 2006, and maintained for four and a half months at natural temperature, and at 15°C, 20°C, 25°C, and 30°C. The adventitious bud formation rate was highest at 20°C with a 100% of cuttings forming adventitious buds, followed by 95% at 25°C, 85% at natural temperature, 70% at 30°C, and 20% at 15°C. Temperatures of 20-25°C are equivalent to spring and autumn temperatures in its natural habitat. Leaf cutting form few adventitious buds at 15°C and leaves were damaged at 30°C. The adventitious bud originated from a cell under the cuticle layer of the basal part of the leaf after rooting from the cut end of the leaf. The number of adventitious buds per leaf was high (2.6-1.9) at the natural temperature, 20 and 25°C. | |
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