蝴蝶兰花芽诱导过程中碳水化合物在叶与腋芽中的分配变化

 研究了粉色蝴蝶兰（KM 833）在两个不同条件下处理（处理组：人工气候箱日/夜温25℃/20℃；对照组：温室大棚生长条件）过程中叶片和腋芽中碳水化合物在叶与腋芽中的分配变化。结果发现对照的蝴蝶兰新叶开始时面积增长较快，但最后的叶面积的大小基本相同，处理组的单位叶面积干样质量在15 d后超过对照组；处理组蝴蝶兰叶片还原糖含量在20 d达到1个小高峰后下降，在30 d后开始急剧上升,至50 d达到最大值(31.08 mg·g^-1DM)，对照组的蝴蝶兰叶片还原糖含量在整个试验期间则较为恒定且缓慢地增长，腋芽中的还原糖含量则随时间而下降；两种处理蝴蝶兰叶片的可溶性糖和淀粉含量均随着时间的进程而逐步升高，处理组的蝴蝶兰腋芽中的可溶性糖和淀粉含量则在处理15 d内有个快速增加后缓慢下降，对照组腋芽的三类碳水化合物在处理期间处于上升趋势。无论在叶还是腋芽中,诱导组的碳水化合物含量均高于对照组。

Changes in Carbohydrates Distribution in Phalaenopsis Leaves and Axillary Buds During Floral Induction

The changes of carbohydrates distribution in Phalaenopsis' leaves and axillary buds were studied by two different temperature treatments. The experimental group was cultivated at 25℃/20℃(day/night), while the control group (control) was carried out in the plastic greenhouse. The results showed that areas of the young leaves increased faster in control than those of the experimental groups in primary stage of the experiment, but their area of mature leaves were approximately equal; while the dry mass of specific leaf area in experimental group exceeded that of control after 15 d treatment. Reducing sugar content of Phalaenopsis' leaves in experimental group dropped after reaching a peak at 20 d, and then elevated rapidly after 30 d and got the largest value which was 31.08 mg·g^-1DM at 50 d. While reducing sugar content in the axillary buds descended gradually. The content of soluble sugar, starch and total sugar in Phalaenopsis' leaves rose under the two treatments, but these carbohydrates of Phalaenopsis' axillary buds in experimental group increased rapidly in 15 d and then decreased slowly, at the same time these substances in axillary buds of control increased during the whole experiment. However, the total carbohydrates contents in both leaves and axillary buds in the experimental group were higher than those in control during the period of treatment.