LA型雜交種百合組培苗促成栽培之研究

Abstract

LA型雜交百合組培苗生長於不同控溫條件，其鱗片葉展開速率為0.40-0.75枚/週，以20/15℃條件較佳，顯示呈中強簇生型。在抽莖轉換期，其莖頂分生組織細胞分裂頻率增加，初生加厚分生組織由縱分裂轉為橫向分裂，細胞亦伸長，造成節間迅速增長，使第一伸長節間以上的幼葉及葉原體被提升至地面而發育為莖生葉。簇生期轉換至抽莖期為低溫感應型，以15/13℃綠株低溫處理5-6週，抽莖率可達100%，低溫處理後生長於25/20℃，則可在79-92天內開花，株高47-52公分，平均花蕾數為6.3個，表現早生多花特性，適合切花或盆花栽培利用。

Vitro plants of LA hybrids lily werw grown under different temperature regimes. The rate of scale leaf formation was 0.40 - 0.75 per week, with 20/15℃ relatively better, expressing dominant rosette type. In phase change, shoot apex was observed having high mitotic activity. Cell division in primary thickening meristem (PTM) was oriented from longitudinal to horizontal, and the internodes elongated rapidly. The young leaves and leaf primordia at upper site were raised with the elongation zone and developed into foliage leaves. The transition of compressed stem to elongated type was low temperature depended. Plants grown at 15/13℃ for 5 - 6 weeks were induced with shoot emergence rate up to 100%. Cultured under 25/20℃, the pretreated plants would bloom in 79 - 92 days. Record of the height was 47 - 52 cm, and the average number of buds was 6.3. The result indicates that LA hybrids are precocious and multiflorous, and the characteristics are suitable for cut flowers or potted flowers .