Abstract
The Easter lily from Uotsuri-jima (Hoa-pin-su) Island, referred as ′Senkaku′ in this paper, was propagated by scale, and the scale bulblets were grown at 4 different temperatures in a phytotron. Their growth responses were compared with those of cultivars ′Hinomoto′ and ′Munakata′.
′Senkaku′ had more slender and glossy leaves and also the stem elongation was greater than the others. When scaled at 15°C, ′Senkaku′ produced scaly leaves earlier than others during the scaling period. When scaled at 25°C, no leaves emerged in any lilies until the end of the scaling period. ′Hinomoto′ scaled at 15°C bolted in some degree before the beginning of the growing period. When scaled at 25°C, ca. 60% of scale bulblets bolted in ′Senkaku′ and ca. 30-40% in ′Hinomoto′ and Munakata′ within 1-2 months after they were moved to the growing temperatures. All of these bolted plants did not have any scaly leaf but had stem one. ′Hinomoto′ and ′Munakata′, however, began to bolt in 3-4 months on some bulblets which had scaly leaves. These plants had both scaly and stem leaves. When scaled at 15°C, ′Senkaku′ did not bolt during the growing period at any temperature. ′Hinomoto′ and ′Munakata′ did not bolt within 1-2 months, but began to bolt in 3-4 months at 15 and 20°C of growing temperature. These bolted plants had both scaly and stem leaves whereas non-bolted plants had scaly leaves only. As mentioned above, the growth responses of ′Senkaku′ were rather different from other lilies.
Above results made clear about the growth sequence from the scale bulblets to the yearling as follows.
